1404 lines
46 KiB
C
1404 lines
46 KiB
C
/**
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* cgltf_write - a single-file glTF 2.0 writer written in C99.
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*
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* Version: 1.13
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*
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* Website: https://github.com/jkuhlmann/cgltf
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*
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* Distributed under the MIT License, see notice at the end of this file.
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*
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* Building:
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* Include this file where you need the struct and function
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* declarations. Have exactly one source file where you define
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* `CGLTF_WRITE_IMPLEMENTATION` before including this file to get the
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* function definitions.
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*
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* Reference:
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* `cgltf_result cgltf_write_file(const cgltf_options* options, const char*
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* path, const cgltf_data* data)` writes JSON to the given file path. Buffer
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* files and external images are not written out. `data` is not deallocated.
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*
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* `cgltf_size cgltf_write(const cgltf_options* options, char* buffer,
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* cgltf_size size, const cgltf_data* data)` writes JSON into the given memory
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* buffer. Returns the number of bytes written to `buffer`, including a null
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* terminator. If buffer is null, returns the number of bytes that would have
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* been written. `data` is not deallocated.
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*
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* To write custom JSON into the `extras` field, aggregate all the custom JSON
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* into a single buffer, then set `file_data` to this buffer. By supplying
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* start_offset and end_offset values for various objects, you can select a
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* range of characters within the aggregated buffer.
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*/
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#ifndef CGLTF_WRITE_H_INCLUDED__
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#define CGLTF_WRITE_H_INCLUDED__
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#include "cgltf.h"
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#include <stddef.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data);
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cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data);
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#ifdef __cplusplus
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}
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#endif
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#endif /* #ifndef CGLTF_WRITE_H_INCLUDED__ */
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/*
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*
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* Stop now, if you are only interested in the API.
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* Below, you find the implementation.
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*
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*/
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#if defined(__INTELLISENSE__) || defined(__JETBRAINS_IDE__)
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/* This makes MSVC/CLion intellisense work. */
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#define CGLTF_WRITE_IMPLEMENTATION
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#endif
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#ifdef CGLTF_WRITE_IMPLEMENTATION
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#include <assert.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <float.h>
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#define CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM (1 << 0)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT (1 << 1)
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#define CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS (1 << 2)
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#define CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL (1 << 3)
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#define CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION (1 << 4)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT (1 << 5)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_IOR (1 << 6)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR (1 << 7)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION (1 << 8)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_SHEEN (1 << 9)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS (1 << 10)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_VOLUME (1 << 11)
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#define CGLTF_EXTENSION_FLAG_TEXTURE_BASISU (1 << 12)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH (1 << 13)
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#define CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING (1 << 14)
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#define CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE (1 << 15)
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typedef struct {
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char* buffer;
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cgltf_size buffer_size;
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cgltf_size remaining;
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char* cursor;
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cgltf_size tmp;
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cgltf_size chars_written;
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const cgltf_data* data;
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int depth;
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const char* indent;
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int needs_comma;
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uint32_t extension_flags;
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uint32_t required_extension_flags;
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} cgltf_write_context;
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#define CGLTF_MIN(a, b) (a < b ? a : b)
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#ifdef FLT_DECIMAL_DIG
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// FLT_DECIMAL_DIG is C11
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#define CGLTF_DECIMAL_DIG (FLT_DECIMAL_DIG)
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#else
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#define CGLTF_DECIMAL_DIG 9
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#endif
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#define CGLTF_SPRINTF(...) { \
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assert(context->cursor || (!context->cursor && context->remaining == 0)); \
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context->tmp = snprintf ( context->cursor, context->remaining, __VA_ARGS__ ); \
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context->chars_written += context->tmp; \
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if (context->cursor) { \
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context->cursor += context->tmp; \
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context->remaining -= context->tmp; \
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} }
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#define CGLTF_SNPRINTF(length, ...) { \
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assert(context->cursor || (!context->cursor && context->remaining == 0)); \
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context->tmp = snprintf ( context->cursor, CGLTF_MIN(length + 1, context->remaining), __VA_ARGS__ ); \
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context->chars_written += length; \
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if (context->cursor) { \
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context->cursor += length; \
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context->remaining -= length; \
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} }
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#define CGLTF_WRITE_IDXPROP(label, val, start) if (val) { \
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cgltf_write_indent(context); \
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CGLTF_SPRINTF("\"%s\": %d", label, (int) (val - start)); \
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context->needs_comma = 1; }
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#define CGLTF_WRITE_IDXARRPROP(label, dim, vals, start) if (vals) { \
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cgltf_write_indent(context); \
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CGLTF_SPRINTF("\"%s\": [", label); \
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for (int i = 0; i < (int)(dim); ++i) { \
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int idx = (int) (vals[i] - start); \
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if (i != 0) CGLTF_SPRINTF(","); \
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CGLTF_SPRINTF(" %d", idx); \
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} \
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CGLTF_SPRINTF(" ]"); \
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context->needs_comma = 1; }
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#define CGLTF_WRITE_TEXTURE_INFO(label, info) if (info.texture) { \
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cgltf_write_line(context, "\"" label "\": {"); \
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CGLTF_WRITE_IDXPROP("index", info.texture, context->data->textures); \
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cgltf_write_intprop(context, "texCoord", info.texcoord, 0); \
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cgltf_write_floatprop(context, "scale", info.scale, 1.0f); \
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if (info.has_transform) { \
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context->extension_flags |= CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM; \
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cgltf_write_texture_transform(context, &info.transform); \
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} \
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cgltf_write_extras(context, &info.extras); \
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cgltf_write_line(context, "}"); }
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static void cgltf_write_indent(cgltf_write_context* context)
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{
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if (context->needs_comma)
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{
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CGLTF_SPRINTF(",\n");
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context->needs_comma = 0;
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}
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else
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{
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CGLTF_SPRINTF("\n");
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}
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for (int i = 0; i < context->depth; ++i)
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{
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CGLTF_SPRINTF("%s", context->indent);
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}
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}
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static void cgltf_write_line(cgltf_write_context* context, const char* line)
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{
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if (line[0] == ']' || line[0] == '}')
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{
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--context->depth;
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context->needs_comma = 0;
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}
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cgltf_write_indent(context);
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CGLTF_SPRINTF("%s", line);
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cgltf_size last = (cgltf_size)(strlen(line) - 1);
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if (line[0] == ']' || line[0] == '}')
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{
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context->needs_comma = 1;
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}
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if (line[last] == '[' || line[last] == '{')
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{
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++context->depth;
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context->needs_comma = 0;
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}
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}
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static void cgltf_write_strprop(cgltf_write_context* context, const char* label, const char* val)
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{
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if (val)
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{
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cgltf_write_indent(context);
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CGLTF_SPRINTF("\"%s\": \"%s\"", label, val);
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context->needs_comma = 1;
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}
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}
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static void cgltf_write_extras(cgltf_write_context* context, const cgltf_extras* extras)
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{
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cgltf_size length = extras->end_offset - extras->start_offset;
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if (length > 0 && context->data->file_data)
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{
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char* json_string = ((char*) context->data->file_data) + extras->start_offset;
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cgltf_write_indent(context);
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CGLTF_SPRINTF("%s", "\"extras\": ");
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CGLTF_SNPRINTF(length, "%.*s", (int)(extras->end_offset - extras->start_offset), json_string);
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context->needs_comma = 1;
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}
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}
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static void cgltf_write_stritem(cgltf_write_context* context, const char* item)
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{
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cgltf_write_indent(context);
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CGLTF_SPRINTF("\"%s\"", item);
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context->needs_comma = 1;
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}
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static void cgltf_write_intprop(cgltf_write_context* context, const char* label, int val, int def)
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{
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if (val != def)
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{
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cgltf_write_indent(context);
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CGLTF_SPRINTF("\"%s\": %d", label, val);
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context->needs_comma = 1;
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}
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}
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static void cgltf_write_sizeprop(cgltf_write_context* context, const char* label, cgltf_size val, cgltf_size def)
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{
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if (val != def)
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{
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cgltf_write_indent(context);
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CGLTF_SPRINTF("\"%s\": %zu", label, val);
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context->needs_comma = 1;
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}
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}
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static void cgltf_write_floatprop(cgltf_write_context* context, const char* label, float val, float def)
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{
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if (val != def)
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{
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cgltf_write_indent(context);
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CGLTF_SPRINTF("\"%s\": ", label);
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CGLTF_SPRINTF("%.*g", CGLTF_DECIMAL_DIG, val);
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context->needs_comma = 1;
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if (context->cursor)
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{
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char *decimal_comma = strchr(context->cursor - context->tmp, ',');
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if (decimal_comma)
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{
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*decimal_comma = '.';
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}
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}
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}
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}
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static void cgltf_write_boolprop_optional(cgltf_write_context* context, const char* label, bool val, bool def)
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{
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if (val != def)
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{
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cgltf_write_indent(context);
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CGLTF_SPRINTF("\"%s\": %s", label, val ? "true" : "false");
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context->needs_comma = 1;
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}
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}
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static void cgltf_write_floatarrayprop(cgltf_write_context* context, const char* label, const cgltf_float* vals, cgltf_size dim)
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{
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cgltf_write_indent(context);
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CGLTF_SPRINTF("\"%s\": [", label);
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for (cgltf_size i = 0; i < dim; ++i)
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{
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if (i != 0)
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{
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CGLTF_SPRINTF(", %.*g", CGLTF_DECIMAL_DIG, vals[i]);
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}
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else
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{
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CGLTF_SPRINTF("%.*g", CGLTF_DECIMAL_DIG, vals[i]);
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}
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}
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CGLTF_SPRINTF("]");
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context->needs_comma = 1;
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}
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static bool cgltf_check_floatarray(const float* vals, int dim, float val) {
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while (dim--)
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{
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if (vals[dim] != val)
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{
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return true;
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}
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}
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return false;
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}
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static int cgltf_int_from_component_type(cgltf_component_type ctype)
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{
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switch (ctype)
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{
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case cgltf_component_type_r_8: return 5120;
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case cgltf_component_type_r_8u: return 5121;
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case cgltf_component_type_r_16: return 5122;
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case cgltf_component_type_r_16u: return 5123;
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case cgltf_component_type_r_32u: return 5125;
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case cgltf_component_type_r_32f: return 5126;
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default: return 0;
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}
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}
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static const char* cgltf_str_from_alpha_mode(cgltf_alpha_mode alpha_mode)
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{
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switch (alpha_mode)
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{
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case cgltf_alpha_mode_mask: return "MASK";
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case cgltf_alpha_mode_blend: return "BLEND";
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default: return NULL;
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}
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}
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static const char* cgltf_str_from_type(cgltf_type type)
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{
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switch (type)
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{
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case cgltf_type_scalar: return "SCALAR";
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case cgltf_type_vec2: return "VEC2";
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case cgltf_type_vec3: return "VEC3";
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case cgltf_type_vec4: return "VEC4";
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case cgltf_type_mat2: return "MAT2";
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case cgltf_type_mat3: return "MAT3";
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case cgltf_type_mat4: return "MAT4";
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default: return NULL;
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}
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}
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static cgltf_size cgltf_dim_from_type(cgltf_type type)
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{
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switch (type)
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{
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case cgltf_type_scalar: return 1;
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case cgltf_type_vec2: return 2;
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case cgltf_type_vec3: return 3;
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case cgltf_type_vec4: return 4;
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case cgltf_type_mat2: return 4;
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case cgltf_type_mat3: return 9;
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case cgltf_type_mat4: return 16;
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default: return 0;
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}
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}
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static const char* cgltf_str_from_camera_type(cgltf_camera_type camera_type)
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{
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switch (camera_type)
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{
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case cgltf_camera_type_perspective: return "perspective";
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case cgltf_camera_type_orthographic: return "orthographic";
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default: return NULL;
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}
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}
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static const char* cgltf_str_from_light_type(cgltf_light_type light_type)
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{
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switch (light_type)
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{
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case cgltf_light_type_directional: return "directional";
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case cgltf_light_type_point: return "point";
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case cgltf_light_type_spot: return "spot";
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default: return NULL;
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}
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}
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static void cgltf_write_texture_transform(cgltf_write_context* context, const cgltf_texture_transform* transform)
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{
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cgltf_write_line(context, "\"extensions\": {");
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cgltf_write_line(context, "\"KHR_texture_transform\": {");
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if (cgltf_check_floatarray(transform->offset, 2, 0.0f))
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{
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cgltf_write_floatarrayprop(context, "offset", transform->offset, 2);
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}
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cgltf_write_floatprop(context, "rotation", transform->rotation, 0.0f);
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if (cgltf_check_floatarray(transform->scale, 2, 1.0f))
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{
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cgltf_write_floatarrayprop(context, "scale", transform->scale, 2);
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}
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if (transform->has_texcoord)
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{
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cgltf_write_intprop(context, "texCoord", transform->texcoord, -1);
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}
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cgltf_write_line(context, "}");
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cgltf_write_line(context, "}");
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}
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static void cgltf_write_asset(cgltf_write_context* context, const cgltf_asset* asset)
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{
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cgltf_write_line(context, "\"asset\": {");
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cgltf_write_strprop(context, "copyright", asset->copyright);
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cgltf_write_strprop(context, "generator", asset->generator);
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cgltf_write_strprop(context, "version", asset->version);
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cgltf_write_strprop(context, "min_version", asset->min_version);
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cgltf_write_extras(context, &asset->extras);
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cgltf_write_line(context, "}");
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}
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static void cgltf_write_primitive(cgltf_write_context* context, const cgltf_primitive* prim)
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{
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cgltf_write_intprop(context, "mode", (int) prim->type, 4);
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CGLTF_WRITE_IDXPROP("indices", prim->indices, context->data->accessors);
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CGLTF_WRITE_IDXPROP("material", prim->material, context->data->materials);
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cgltf_write_line(context, "\"attributes\": {");
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for (cgltf_size i = 0; i < prim->attributes_count; ++i)
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{
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const cgltf_attribute* attr = prim->attributes + i;
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CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
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}
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cgltf_write_line(context, "}");
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if (prim->targets_count)
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{
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cgltf_write_line(context, "\"targets\": [");
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for (cgltf_size i = 0; i < prim->targets_count; ++i)
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{
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cgltf_write_line(context, "{");
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for (cgltf_size j = 0; j < prim->targets[i].attributes_count; ++j)
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{
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const cgltf_attribute* attr = prim->targets[i].attributes + j;
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CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
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}
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cgltf_write_line(context, "}");
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}
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cgltf_write_line(context, "]");
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}
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cgltf_write_extras(context, &prim->extras);
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if (prim->has_draco_mesh_compression || prim->mappings_count > 0)
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{
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cgltf_write_line(context, "\"extensions\": {");
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if (prim->has_draco_mesh_compression)
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{
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context->extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION;
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if (prim->attributes_count == 0 || prim->indices == 0)
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{
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context->required_extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION;
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}
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|
|
cgltf_write_line(context, "\"KHR_draco_mesh_compression\": {");
|
|
CGLTF_WRITE_IDXPROP("bufferView", prim->draco_mesh_compression.buffer_view, context->data->buffer_views);
|
|
cgltf_write_line(context, "\"attributes\": {");
|
|
for (cgltf_size i = 0; i < prim->draco_mesh_compression.attributes_count; ++i)
|
|
{
|
|
const cgltf_attribute* attr = prim->draco_mesh_compression.attributes + i;
|
|
CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
if (prim->mappings_count > 0)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS;
|
|
cgltf_write_line(context, "\"KHR_materials_variants\": {");
|
|
cgltf_write_line(context, "\"mappings\": [");
|
|
for (cgltf_size i = 0; i < prim->mappings_count; ++i)
|
|
{
|
|
const cgltf_material_mapping* map = prim->mappings + i;
|
|
cgltf_write_line(context, "{");
|
|
CGLTF_WRITE_IDXPROP("material", map->material, context->data->materials);
|
|
|
|
cgltf_write_indent(context);
|
|
CGLTF_SPRINTF("\"variants\": [%d]", (int)map->variant);
|
|
context->needs_comma = 1;
|
|
|
|
cgltf_write_extras(context, &map->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
}
|
|
|
|
static void cgltf_write_mesh(cgltf_write_context* context, const cgltf_mesh* mesh)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", mesh->name);
|
|
|
|
cgltf_write_line(context, "\"primitives\": [");
|
|
for (cgltf_size i = 0; i < mesh->primitives_count; ++i)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_primitive(context, mesh->primitives + i);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
|
|
if (mesh->weights_count > 0)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "weights", mesh->weights, mesh->weights_count);
|
|
}
|
|
|
|
cgltf_write_extras(context, &mesh->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_buffer_view(cgltf_write_context* context, const cgltf_buffer_view* view)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", view->name);
|
|
CGLTF_WRITE_IDXPROP("buffer", view->buffer, context->data->buffers);
|
|
cgltf_write_sizeprop(context, "byteLength", view->size, (cgltf_size)-1);
|
|
cgltf_write_sizeprop(context, "byteOffset", view->offset, 0);
|
|
cgltf_write_sizeprop(context, "byteStride", view->stride, 0);
|
|
// NOTE: We skip writing "target" because the spec says its usage can be inferred.
|
|
cgltf_write_extras(context, &view->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
|
|
static void cgltf_write_buffer(cgltf_write_context* context, const cgltf_buffer* buffer)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", buffer->name);
|
|
cgltf_write_strprop(context, "uri", buffer->uri);
|
|
cgltf_write_sizeprop(context, "byteLength", buffer->size, (cgltf_size)-1);
|
|
cgltf_write_extras(context, &buffer->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_material(cgltf_write_context* context, const cgltf_material* material)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", material->name);
|
|
if (material->alpha_mode == cgltf_alpha_mode_mask)
|
|
{
|
|
cgltf_write_floatprop(context, "alphaCutoff", material->alpha_cutoff, 0.5f);
|
|
}
|
|
cgltf_write_boolprop_optional(context, "doubleSided", (bool)material->double_sided, false);
|
|
// cgltf_write_boolprop_optional(context, "unlit", material->unlit, false);
|
|
|
|
if (material->unlit)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT;
|
|
}
|
|
|
|
if (material->has_pbr_specular_glossiness)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS;
|
|
}
|
|
|
|
if (material->has_clearcoat)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT;
|
|
}
|
|
|
|
if (material->has_transmission)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION;
|
|
}
|
|
|
|
if (material->has_volume)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_VOLUME;
|
|
}
|
|
|
|
if (material->has_ior)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IOR;
|
|
}
|
|
|
|
if (material->has_specular)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR;
|
|
}
|
|
|
|
if (material->has_sheen)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_SHEEN;
|
|
}
|
|
|
|
if (material->has_emissive_strength)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH;
|
|
}
|
|
|
|
if (material->has_iridescence)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE;
|
|
}
|
|
|
|
if (material->has_pbr_metallic_roughness)
|
|
{
|
|
const cgltf_pbr_metallic_roughness* params = &material->pbr_metallic_roughness;
|
|
cgltf_write_line(context, "\"pbrMetallicRoughness\": {");
|
|
CGLTF_WRITE_TEXTURE_INFO("baseColorTexture", params->base_color_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("metallicRoughnessTexture", params->metallic_roughness_texture);
|
|
cgltf_write_floatprop(context, "metallicFactor", params->metallic_factor, 1.0f);
|
|
cgltf_write_floatprop(context, "roughnessFactor", params->roughness_factor, 1.0f);
|
|
if (cgltf_check_floatarray(params->base_color_factor, 4, 1.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "baseColorFactor", params->base_color_factor, 4);
|
|
}
|
|
cgltf_write_extras(context, ¶ms->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission || material->has_sheen || material->has_volume || material->has_emissive_strength || material->has_iridescence)
|
|
{
|
|
cgltf_write_line(context, "\"extensions\": {");
|
|
if (material->has_clearcoat)
|
|
{
|
|
const cgltf_clearcoat* params = &material->clearcoat;
|
|
cgltf_write_line(context, "\"KHR_materials_clearcoat\": {");
|
|
CGLTF_WRITE_TEXTURE_INFO("clearcoatTexture", params->clearcoat_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("clearcoatRoughnessTexture", params->clearcoat_roughness_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("clearcoatNormalTexture", params->clearcoat_normal_texture);
|
|
cgltf_write_floatprop(context, "clearcoatFactor", params->clearcoat_factor, 0.0f);
|
|
cgltf_write_floatprop(context, "clearcoatRoughnessFactor", params->clearcoat_roughness_factor, 0.0f);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->has_ior)
|
|
{
|
|
const cgltf_ior* params = &material->ior;
|
|
cgltf_write_line(context, "\"KHR_materials_ior\": {");
|
|
cgltf_write_floatprop(context, "ior", params->ior, 1.5f);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->has_specular)
|
|
{
|
|
const cgltf_specular* params = &material->specular;
|
|
cgltf_write_line(context, "\"KHR_materials_specular\": {");
|
|
CGLTF_WRITE_TEXTURE_INFO("specularTexture", params->specular_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("specularColorTexture", params->specular_color_texture);
|
|
cgltf_write_floatprop(context, "specularFactor", params->specular_factor, 1.0f);
|
|
if (cgltf_check_floatarray(params->specular_color_factor, 3, 1.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "specularColorFactor", params->specular_color_factor, 3);
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->has_transmission)
|
|
{
|
|
const cgltf_transmission* params = &material->transmission;
|
|
cgltf_write_line(context, "\"KHR_materials_transmission\": {");
|
|
CGLTF_WRITE_TEXTURE_INFO("transmissionTexture", params->transmission_texture);
|
|
cgltf_write_floatprop(context, "transmissionFactor", params->transmission_factor, 0.0f);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->has_volume)
|
|
{
|
|
const cgltf_volume* params = &material->volume;
|
|
cgltf_write_line(context, "\"KHR_materials_volume\": {");
|
|
CGLTF_WRITE_TEXTURE_INFO("thicknessTexture", params->thickness_texture);
|
|
cgltf_write_floatprop(context, "thicknessFactor", params->thickness_factor, 0.0f);
|
|
if (cgltf_check_floatarray(params->attenuation_color, 3, 1.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "attenuationColor", params->attenuation_color, 3);
|
|
}
|
|
if (params->attenuation_distance < FLT_MAX)
|
|
{
|
|
cgltf_write_floatprop(context, "attenuationDistance", params->attenuation_distance, FLT_MAX);
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->has_sheen)
|
|
{
|
|
const cgltf_sheen* params = &material->sheen;
|
|
cgltf_write_line(context, "\"KHR_materials_sheen\": {");
|
|
CGLTF_WRITE_TEXTURE_INFO("sheenColorTexture", params->sheen_color_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("sheenRoughnessTexture", params->sheen_roughness_texture);
|
|
if (cgltf_check_floatarray(params->sheen_color_factor, 3, 0.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "sheenColorFactor", params->sheen_color_factor, 3);
|
|
}
|
|
cgltf_write_floatprop(context, "sheenRoughnessFactor", params->sheen_roughness_factor, 0.0f);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->has_pbr_specular_glossiness)
|
|
{
|
|
const cgltf_pbr_specular_glossiness* params = &material->pbr_specular_glossiness;
|
|
cgltf_write_line(context, "\"KHR_materials_pbrSpecularGlossiness\": {");
|
|
CGLTF_WRITE_TEXTURE_INFO("diffuseTexture", params->diffuse_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("specularGlossinessTexture", params->specular_glossiness_texture);
|
|
if (cgltf_check_floatarray(params->diffuse_factor, 4, 1.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "diffuseFactor", params->diffuse_factor, 4);
|
|
}
|
|
if (cgltf_check_floatarray(params->specular_factor, 3, 1.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "specularFactor", params->specular_factor, 3);
|
|
}
|
|
cgltf_write_floatprop(context, "glossinessFactor", params->glossiness_factor, 1.0f);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->unlit)
|
|
{
|
|
cgltf_write_line(context, "\"KHR_materials_unlit\": {}");
|
|
}
|
|
if (material->has_emissive_strength)
|
|
{
|
|
cgltf_write_line(context, "\"KHR_materials_emissive_strength\": {");
|
|
const cgltf_emissive_strength* params = &material->emissive_strength;
|
|
cgltf_write_floatprop(context, "emissiveStrength", params->emissive_strength, 1.f);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
if (material->has_iridescence)
|
|
{
|
|
cgltf_write_line(context, "\"KHR_materials_iridescence\": {");
|
|
const cgltf_iridescence* params = &material->iridescence;
|
|
cgltf_write_floatprop(context, "iridescenceFactor", params->iridescence_factor, 0.f);
|
|
CGLTF_WRITE_TEXTURE_INFO("iridescenceTexture", params->iridescence_texture);
|
|
cgltf_write_floatprop(context, "iridescenceIor", params->iridescence_ior, 1.3f);
|
|
cgltf_write_floatprop(context, "iridescenceThicknessMinimum", params->iridescence_thickness_min, 100.f);
|
|
cgltf_write_floatprop(context, "iridescenceThicknessMaximum", params->iridescence_thickness_max, 400.f);
|
|
CGLTF_WRITE_TEXTURE_INFO("iridescenceThicknessTexture", params->iridescence_thickness_texture);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
CGLTF_WRITE_TEXTURE_INFO("normalTexture", material->normal_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("occlusionTexture", material->occlusion_texture);
|
|
CGLTF_WRITE_TEXTURE_INFO("emissiveTexture", material->emissive_texture);
|
|
if (cgltf_check_floatarray(material->emissive_factor, 3, 0.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "emissiveFactor", material->emissive_factor, 3);
|
|
}
|
|
cgltf_write_strprop(context, "alphaMode", cgltf_str_from_alpha_mode(material->alpha_mode));
|
|
cgltf_write_extras(context, &material->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_image(cgltf_write_context* context, const cgltf_image* image)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", image->name);
|
|
cgltf_write_strprop(context, "uri", image->uri);
|
|
CGLTF_WRITE_IDXPROP("bufferView", image->buffer_view, context->data->buffer_views);
|
|
cgltf_write_strprop(context, "mimeType", image->mime_type);
|
|
cgltf_write_extras(context, &image->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_texture(cgltf_write_context* context, const cgltf_texture* texture)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", texture->name);
|
|
CGLTF_WRITE_IDXPROP("source", texture->image, context->data->images);
|
|
CGLTF_WRITE_IDXPROP("sampler", texture->sampler, context->data->samplers);
|
|
|
|
if (texture->has_basisu)
|
|
{
|
|
cgltf_write_line(context, "\"extensions\": {");
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_TEXTURE_BASISU;
|
|
cgltf_write_line(context, "\"KHR_texture_basisu\": {");
|
|
CGLTF_WRITE_IDXPROP("source", texture->basisu_image, context->data->images);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_extras(context, &texture->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_skin(cgltf_write_context* context, const cgltf_skin* skin)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
CGLTF_WRITE_IDXPROP("skeleton", skin->skeleton, context->data->nodes);
|
|
CGLTF_WRITE_IDXPROP("inverseBindMatrices", skin->inverse_bind_matrices, context->data->accessors);
|
|
CGLTF_WRITE_IDXARRPROP("joints", skin->joints_count, skin->joints, context->data->nodes);
|
|
cgltf_write_strprop(context, "name", skin->name);
|
|
cgltf_write_extras(context, &skin->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static const char* cgltf_write_str_path_type(cgltf_animation_path_type path_type)
|
|
{
|
|
switch (path_type)
|
|
{
|
|
case cgltf_animation_path_type_translation:
|
|
return "translation";
|
|
case cgltf_animation_path_type_rotation:
|
|
return "rotation";
|
|
case cgltf_animation_path_type_scale:
|
|
return "scale";
|
|
case cgltf_animation_path_type_weights:
|
|
return "weights";
|
|
default:
|
|
break;
|
|
}
|
|
return "invalid";
|
|
}
|
|
|
|
static const char* cgltf_write_str_interpolation_type(cgltf_interpolation_type interpolation_type)
|
|
{
|
|
switch (interpolation_type)
|
|
{
|
|
case cgltf_interpolation_type_linear:
|
|
return "LINEAR";
|
|
case cgltf_interpolation_type_step:
|
|
return "STEP";
|
|
case cgltf_interpolation_type_cubic_spline:
|
|
return "CUBICSPLINE";
|
|
default:
|
|
break;
|
|
}
|
|
return "invalid";
|
|
}
|
|
|
|
static void cgltf_write_path_type(cgltf_write_context* context, const char *label, cgltf_animation_path_type path_type)
|
|
{
|
|
cgltf_write_strprop(context, label, cgltf_write_str_path_type(path_type));
|
|
}
|
|
|
|
static void cgltf_write_interpolation_type(cgltf_write_context* context, const char *label, cgltf_interpolation_type interpolation_type)
|
|
{
|
|
cgltf_write_strprop(context, label, cgltf_write_str_interpolation_type(interpolation_type));
|
|
}
|
|
|
|
static void cgltf_write_animation_sampler(cgltf_write_context* context, const cgltf_animation_sampler* animation_sampler)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_interpolation_type(context, "interpolation", animation_sampler->interpolation);
|
|
CGLTF_WRITE_IDXPROP("input", animation_sampler->input, context->data->accessors);
|
|
CGLTF_WRITE_IDXPROP("output", animation_sampler->output, context->data->accessors);
|
|
cgltf_write_extras(context, &animation_sampler->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_animation_channel(cgltf_write_context* context, const cgltf_animation* animation, const cgltf_animation_channel* animation_channel)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
CGLTF_WRITE_IDXPROP("sampler", animation_channel->sampler, animation->samplers);
|
|
cgltf_write_line(context, "\"target\": {");
|
|
CGLTF_WRITE_IDXPROP("node", animation_channel->target_node, context->data->nodes);
|
|
cgltf_write_path_type(context, "path", animation_channel->target_path);
|
|
cgltf_write_line(context, "}");
|
|
cgltf_write_extras(context, &animation_channel->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_animation(cgltf_write_context* context, const cgltf_animation* animation)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", animation->name);
|
|
|
|
if (animation->samplers_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"samplers\": [");
|
|
for (cgltf_size i = 0; i < animation->samplers_count; ++i)
|
|
{
|
|
cgltf_write_animation_sampler(context, animation->samplers + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
if (animation->channels_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"channels\": [");
|
|
for (cgltf_size i = 0; i < animation->channels_count; ++i)
|
|
{
|
|
cgltf_write_animation_channel(context, animation, animation->channels + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
cgltf_write_extras(context, &animation->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_sampler(cgltf_write_context* context, const cgltf_sampler* sampler)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", sampler->name);
|
|
cgltf_write_intprop(context, "magFilter", sampler->mag_filter, 0);
|
|
cgltf_write_intprop(context, "minFilter", sampler->min_filter, 0);
|
|
cgltf_write_intprop(context, "wrapS", sampler->wrap_s, 10497);
|
|
cgltf_write_intprop(context, "wrapT", sampler->wrap_t, 10497);
|
|
cgltf_write_extras(context, &sampler->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_node(cgltf_write_context* context, const cgltf_node* node)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
CGLTF_WRITE_IDXARRPROP("children", node->children_count, node->children, context->data->nodes);
|
|
CGLTF_WRITE_IDXPROP("mesh", node->mesh, context->data->meshes);
|
|
cgltf_write_strprop(context, "name", node->name);
|
|
if (node->has_matrix)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "matrix", node->matrix, 16);
|
|
}
|
|
if (node->has_translation)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "translation", node->translation, 3);
|
|
}
|
|
if (node->has_rotation)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "rotation", node->rotation, 4);
|
|
}
|
|
if (node->has_scale)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "scale", node->scale, 3);
|
|
}
|
|
if (node->skin)
|
|
{
|
|
CGLTF_WRITE_IDXPROP("skin", node->skin, context->data->skins);
|
|
}
|
|
|
|
bool has_extension = node->light || (node->has_mesh_gpu_instancing && node->mesh_gpu_instancing.attributes_count > 0);
|
|
if(has_extension)
|
|
cgltf_write_line(context, "\"extensions\": {");
|
|
|
|
if (node->light)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL;
|
|
cgltf_write_line(context, "\"KHR_lights_punctual\": {");
|
|
CGLTF_WRITE_IDXPROP("light", node->light, context->data->lights);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
if (node->has_mesh_gpu_instancing && node->mesh_gpu_instancing.attributes_count > 0)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING;
|
|
context->required_extension_flags |= CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING;
|
|
|
|
cgltf_write_line(context, "\"EXT_mesh_gpu_instancing\": {");
|
|
{
|
|
CGLTF_WRITE_IDXPROP("bufferView", node->mesh_gpu_instancing.buffer_view, context->data->buffer_views);
|
|
cgltf_write_line(context, "\"attributes\": {");
|
|
{
|
|
for (cgltf_size i = 0; i < node->mesh_gpu_instancing.attributes_count; ++i)
|
|
{
|
|
const cgltf_attribute* attr = node->mesh_gpu_instancing.attributes + i;
|
|
CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
|
|
}
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
if (has_extension)
|
|
cgltf_write_line(context, "}");
|
|
|
|
if (node->weights_count > 0)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "weights", node->weights, node->weights_count);
|
|
}
|
|
|
|
if (node->camera)
|
|
{
|
|
CGLTF_WRITE_IDXPROP("camera", node->camera, context->data->cameras);
|
|
}
|
|
|
|
cgltf_write_extras(context, &node->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_scene(cgltf_write_context* context, const cgltf_scene* scene)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", scene->name);
|
|
CGLTF_WRITE_IDXARRPROP("nodes", scene->nodes_count, scene->nodes, context->data->nodes);
|
|
cgltf_write_extras(context, &scene->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_accessor(cgltf_write_context* context, const cgltf_accessor* accessor)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", accessor->name);
|
|
CGLTF_WRITE_IDXPROP("bufferView", accessor->buffer_view, context->data->buffer_views);
|
|
cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->component_type), 0);
|
|
cgltf_write_strprop(context, "type", cgltf_str_from_type(accessor->type));
|
|
cgltf_size dim = cgltf_dim_from_type(accessor->type);
|
|
cgltf_write_boolprop_optional(context, "normalized", (bool)accessor->normalized, false);
|
|
cgltf_write_sizeprop(context, "byteOffset", (int)accessor->offset, 0);
|
|
cgltf_write_intprop(context, "count", (int)accessor->count, -1);
|
|
if (accessor->has_min)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "min", accessor->min, dim);
|
|
}
|
|
if (accessor->has_max)
|
|
{
|
|
cgltf_write_floatarrayprop(context, "max", accessor->max, dim);
|
|
}
|
|
if (accessor->is_sparse)
|
|
{
|
|
cgltf_write_line(context, "\"sparse\": {");
|
|
cgltf_write_intprop(context, "count", (int)accessor->sparse.count, 0);
|
|
cgltf_write_line(context, "\"indices\": {");
|
|
cgltf_write_sizeprop(context, "byteOffset", (int)accessor->sparse.indices_byte_offset, 0);
|
|
CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.indices_buffer_view, context->data->buffer_views);
|
|
cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->sparse.indices_component_type), 0);
|
|
cgltf_write_extras(context, &accessor->sparse.indices_extras);
|
|
cgltf_write_line(context, "}");
|
|
cgltf_write_line(context, "\"values\": {");
|
|
cgltf_write_sizeprop(context, "byteOffset", (int)accessor->sparse.values_byte_offset, 0);
|
|
CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.values_buffer_view, context->data->buffer_views);
|
|
cgltf_write_extras(context, &accessor->sparse.values_extras);
|
|
cgltf_write_line(context, "}");
|
|
cgltf_write_extras(context, &accessor->sparse.extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_extras(context, &accessor->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_camera(cgltf_write_context* context, const cgltf_camera* camera)
|
|
{
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "type", cgltf_str_from_camera_type(camera->type));
|
|
if (camera->name)
|
|
{
|
|
cgltf_write_strprop(context, "name", camera->name);
|
|
}
|
|
|
|
if (camera->type == cgltf_camera_type_orthographic)
|
|
{
|
|
cgltf_write_line(context, "\"orthographic\": {");
|
|
cgltf_write_floatprop(context, "xmag", camera->data.orthographic.xmag, -1.0f);
|
|
cgltf_write_floatprop(context, "ymag", camera->data.orthographic.ymag, -1.0f);
|
|
cgltf_write_floatprop(context, "zfar", camera->data.orthographic.zfar, -1.0f);
|
|
cgltf_write_floatprop(context, "znear", camera->data.orthographic.znear, -1.0f);
|
|
cgltf_write_extras(context, &camera->data.orthographic.extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
else if (camera->type == cgltf_camera_type_perspective)
|
|
{
|
|
cgltf_write_line(context, "\"perspective\": {");
|
|
|
|
if (camera->data.perspective.has_aspect_ratio) {
|
|
cgltf_write_floatprop(context, "aspectRatio", camera->data.perspective.aspect_ratio, -1.0f);
|
|
}
|
|
|
|
cgltf_write_floatprop(context, "yfov", camera->data.perspective.yfov, -1.0f);
|
|
|
|
if (camera->data.perspective.has_zfar) {
|
|
cgltf_write_floatprop(context, "zfar", camera->data.perspective.zfar, -1.0f);
|
|
}
|
|
|
|
cgltf_write_floatprop(context, "znear", camera->data.perspective.znear, -1.0f);
|
|
cgltf_write_extras(context, &camera->data.perspective.extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_extras(context, &camera->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_light(cgltf_write_context* context, const cgltf_light* light)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL;
|
|
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "type", cgltf_str_from_light_type(light->type));
|
|
if (light->name)
|
|
{
|
|
cgltf_write_strprop(context, "name", light->name);
|
|
}
|
|
if (cgltf_check_floatarray(light->color, 3, 1.0f))
|
|
{
|
|
cgltf_write_floatarrayprop(context, "color", light->color, 3);
|
|
}
|
|
cgltf_write_floatprop(context, "intensity", light->intensity, 1.0f);
|
|
cgltf_write_floatprop(context, "range", light->range, 0.0f);
|
|
|
|
if (light->type == cgltf_light_type_spot)
|
|
{
|
|
cgltf_write_line(context, "\"spot\": {");
|
|
cgltf_write_floatprop(context, "innerConeAngle", light->spot_inner_cone_angle, 0.0f);
|
|
cgltf_write_floatprop(context, "outerConeAngle", light->spot_outer_cone_angle, 3.14159265358979323846f/4.0f);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
static void cgltf_write_variant(cgltf_write_context* context, const cgltf_material_variant* variant)
|
|
{
|
|
context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS;
|
|
|
|
cgltf_write_line(context, "{");
|
|
cgltf_write_strprop(context, "name", variant->name);
|
|
cgltf_write_extras(context, &variant->extras);
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data)
|
|
{
|
|
cgltf_size expected = cgltf_write(options, NULL, 0, data);
|
|
char* buffer = (char*) malloc(expected);
|
|
cgltf_size actual = cgltf_write(options, buffer, expected, data);
|
|
if (expected != actual) {
|
|
fprintf(stderr, "Error: expected %zu bytes but wrote %zu bytes.\n", expected, actual);
|
|
}
|
|
FILE* file = fopen(path, "wt");
|
|
if (!file)
|
|
{
|
|
return cgltf_result_file_not_found;
|
|
}
|
|
// Note that cgltf_write() includes a null terminator, which we omit from the file content.
|
|
fwrite(buffer, actual - 1, 1, file);
|
|
fclose(file);
|
|
free(buffer);
|
|
return cgltf_result_success;
|
|
}
|
|
|
|
static void cgltf_write_extensions(cgltf_write_context* context, uint32_t extension_flags)
|
|
{
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM) {
|
|
cgltf_write_stritem(context, "KHR_texture_transform");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT) {
|
|
cgltf_write_stritem(context, "KHR_materials_unlit");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS) {
|
|
cgltf_write_stritem(context, "KHR_materials_pbrSpecularGlossiness");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL) {
|
|
cgltf_write_stritem(context, "KHR_lights_punctual");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION) {
|
|
cgltf_write_stritem(context, "KHR_draco_mesh_compression");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT) {
|
|
cgltf_write_stritem(context, "KHR_materials_clearcoat");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IOR) {
|
|
cgltf_write_stritem(context, "KHR_materials_ior");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR) {
|
|
cgltf_write_stritem(context, "KHR_materials_specular");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION) {
|
|
cgltf_write_stritem(context, "KHR_materials_transmission");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_SHEEN) {
|
|
cgltf_write_stritem(context, "KHR_materials_sheen");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS) {
|
|
cgltf_write_stritem(context, "KHR_materials_variants");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_VOLUME) {
|
|
cgltf_write_stritem(context, "KHR_materials_volume");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_TEXTURE_BASISU) {
|
|
cgltf_write_stritem(context, "KHR_texture_basisu");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH) {
|
|
cgltf_write_stritem(context, "KHR_materials_emissive_strength");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE) {
|
|
cgltf_write_stritem(context, "KHR_materials_iridescence");
|
|
}
|
|
if (extension_flags & CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING) {
|
|
cgltf_write_stritem(context, "EXT_mesh_gpu_instancing");
|
|
}
|
|
}
|
|
|
|
cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data)
|
|
{
|
|
(void)options;
|
|
cgltf_write_context ctx;
|
|
ctx.buffer = buffer;
|
|
ctx.buffer_size = size;
|
|
ctx.remaining = size;
|
|
ctx.cursor = buffer;
|
|
ctx.chars_written = 0;
|
|
ctx.data = data;
|
|
ctx.depth = 1;
|
|
ctx.indent = " ";
|
|
ctx.needs_comma = 0;
|
|
ctx.extension_flags = 0;
|
|
ctx.required_extension_flags = 0;
|
|
|
|
cgltf_write_context* context = &ctx;
|
|
|
|
CGLTF_SPRINTF("{");
|
|
|
|
if (data->accessors_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"accessors\": [");
|
|
for (cgltf_size i = 0; i < data->accessors_count; ++i)
|
|
{
|
|
cgltf_write_accessor(context, data->accessors + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
cgltf_write_asset(context, &data->asset);
|
|
|
|
if (data->buffer_views_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"bufferViews\": [");
|
|
for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
|
|
{
|
|
cgltf_write_buffer_view(context, data->buffer_views + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->buffers_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"buffers\": [");
|
|
for (cgltf_size i = 0; i < data->buffers_count; ++i)
|
|
{
|
|
cgltf_write_buffer(context, data->buffers + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->images_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"images\": [");
|
|
for (cgltf_size i = 0; i < data->images_count; ++i)
|
|
{
|
|
cgltf_write_image(context, data->images + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->meshes_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"meshes\": [");
|
|
for (cgltf_size i = 0; i < data->meshes_count; ++i)
|
|
{
|
|
cgltf_write_mesh(context, data->meshes + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->materials_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"materials\": [");
|
|
for (cgltf_size i = 0; i < data->materials_count; ++i)
|
|
{
|
|
cgltf_write_material(context, data->materials + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->nodes_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"nodes\": [");
|
|
for (cgltf_size i = 0; i < data->nodes_count; ++i)
|
|
{
|
|
cgltf_write_node(context, data->nodes + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->samplers_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"samplers\": [");
|
|
for (cgltf_size i = 0; i < data->samplers_count; ++i)
|
|
{
|
|
cgltf_write_sampler(context, data->samplers + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
CGLTF_WRITE_IDXPROP("scene", data->scene, data->scenes);
|
|
|
|
if (data->scenes_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"scenes\": [");
|
|
for (cgltf_size i = 0; i < data->scenes_count; ++i)
|
|
{
|
|
cgltf_write_scene(context, data->scenes + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->textures_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"textures\": [");
|
|
for (cgltf_size i = 0; i < data->textures_count; ++i)
|
|
{
|
|
cgltf_write_texture(context, data->textures + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->skins_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"skins\": [");
|
|
for (cgltf_size i = 0; i < data->skins_count; ++i)
|
|
{
|
|
cgltf_write_skin(context, data->skins + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->animations_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"animations\": [");
|
|
for (cgltf_size i = 0; i < data->animations_count; ++i)
|
|
{
|
|
cgltf_write_animation(context, data->animations + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->cameras_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"cameras\": [");
|
|
for (cgltf_size i = 0; i < data->cameras_count; ++i)
|
|
{
|
|
cgltf_write_camera(context, data->cameras + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (data->lights_count > 0 || data->variants_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"extensions\": {");
|
|
|
|
if (data->lights_count > 0)
|
|
{
|
|
cgltf_write_line(context, "\"KHR_lights_punctual\": {");
|
|
cgltf_write_line(context, "\"lights\": [");
|
|
for (cgltf_size i = 0; i < data->lights_count; ++i)
|
|
{
|
|
cgltf_write_light(context, data->lights + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
if (data->variants_count)
|
|
{
|
|
cgltf_write_line(context, "\"KHR_materials_variants\": {");
|
|
cgltf_write_line(context, "\"variants\": [");
|
|
for (cgltf_size i = 0; i < data->variants_count; ++i)
|
|
{
|
|
cgltf_write_variant(context, data->variants + i);
|
|
}
|
|
cgltf_write_line(context, "]");
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
cgltf_write_line(context, "}");
|
|
}
|
|
|
|
if (context->extension_flags != 0)
|
|
{
|
|
cgltf_write_line(context, "\"extensionsUsed\": [");
|
|
cgltf_write_extensions(context, context->extension_flags);
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
if (context->required_extension_flags != 0)
|
|
{
|
|
cgltf_write_line(context, "\"extensionsRequired\": [");
|
|
cgltf_write_extensions(context, context->required_extension_flags);
|
|
cgltf_write_line(context, "]");
|
|
}
|
|
|
|
cgltf_write_extras(context, &data->extras);
|
|
|
|
CGLTF_SPRINTF("\n}\n");
|
|
|
|
// snprintf does not include the null terminator in its return value, so be sure to include it
|
|
// in the returned byte count.
|
|
return 1 + ctx.chars_written;
|
|
}
|
|
|
|
#endif /* #ifdef CGLTF_WRITE_IMPLEMENTATION */
|
|
|
|
/* cgltf is distributed under MIT license:
|
|
*
|
|
* Copyright (c) 2019-2021 Philip Rideout
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|