362 lines
8.8 KiB
C
362 lines
8.8 KiB
C
#include "model.h"
|
|
|
|
#include "log.h"
|
|
#include "resources.h"
|
|
#include "stb_ds.h"
|
|
#include "font.h"
|
|
#include "gameobject.h"
|
|
|
|
//#include "diffuse.sglsl.h"
|
|
#include "unlit.sglsl.h"
|
|
|
|
#include "render.h"
|
|
|
|
#include "HandmadeMath.h"
|
|
|
|
#include "math.h"
|
|
#include "time.h"
|
|
|
|
#define CGLTF_IMPLEMENTATION
|
|
#include <cgltf.h>
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "texture.h"
|
|
|
|
#include "sokol/sokol_gfx.h"
|
|
|
|
static void processnode();
|
|
static void processmesh();
|
|
static void processtexture();
|
|
|
|
static sg_shader model_shader;
|
|
static sg_pipeline model_pipe;
|
|
|
|
struct bone_weights {
|
|
char b1;
|
|
char b2;
|
|
char b3;
|
|
char b4;
|
|
};
|
|
|
|
struct mesh_v {
|
|
HMM_Vec3 pos;
|
|
struct uv_n uv;
|
|
uint32_t norm;
|
|
struct bone_weights bones;
|
|
};
|
|
|
|
void model_init() {
|
|
model_shader = sg_make_shader(unlit_shader_desc(sg_query_backend()));
|
|
|
|
model_pipe = sg_make_pipeline(&(sg_pipeline_desc){
|
|
.shader = model_shader,
|
|
.layout = {
|
|
.attrs = {
|
|
[0].format = SG_VERTEXFORMAT_FLOAT3,
|
|
[1].format = SG_VERTEXFORMAT_USHORT2N,
|
|
[1].buffer_index = 1,
|
|
[2].format = SG_VERTEXFORMAT_FLOAT3,
|
|
[2].buffer_index = 2
|
|
},
|
|
},
|
|
.index_type = SG_INDEXTYPE_UINT16,
|
|
.cull_mode = SG_CULLMODE_FRONT,
|
|
.depth.write_enabled = true,
|
|
.depth.compare = SG_COMPAREFUNC_LESS_EQUAL
|
|
});
|
|
}
|
|
|
|
cgltf_attribute *get_attr_type(cgltf_primitive *p, cgltf_attribute_type t)
|
|
{
|
|
for (int i = 0; i < p->attributes_count; i++) {
|
|
if (p->attributes[i].type == t)
|
|
return &p->attributes[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
unsigned short pack_short_texcoord(float x, float y)
|
|
{
|
|
unsigned short s;
|
|
char xc = x*255;
|
|
char yc = y*255;
|
|
return (((unsigned short)yc) << 8) | xc;
|
|
}
|
|
|
|
unsigned short pack_short_tex(float c) { return c * USHRT_MAX; }
|
|
|
|
uint32_t pack_int10_n2(float *norm)
|
|
{
|
|
uint32_t ni[3];
|
|
|
|
for (int i = 0; i < 3; i++) {
|
|
ni[i] = fabs(norm[i]) * 511.0 + 0.5;
|
|
ni[i] = (ni[i] > 511) ? 511 : ni[i];
|
|
ni[i] = ( norm[i] < 0.0 ) ? -ni[i] : ni[i];
|
|
}
|
|
|
|
return (ni[0] & 0x3FF) | ( (ni[1] & 0x3FF) << 10) | ( (ni[2] & 0x3FF) << 20) | ( (0 & 0x3) << 30);
|
|
}
|
|
|
|
void mesh_add_material(mesh *mesh, cgltf_material *mat)
|
|
{
|
|
if (!mat) return;
|
|
|
|
if (mat && mat->has_pbr_metallic_roughness) {
|
|
cgltf_image *img = mat->pbr_metallic_roughness.base_color_texture.texture->image;
|
|
if (img->buffer_view) {
|
|
cgltf_buffer_view *buf = img->buffer_view;
|
|
mesh->bind.fs.images[0] = texture_fromdata(buf->buffer->data, buf->size)->id;
|
|
} else
|
|
mesh->bind.fs.images[0] = texture_from_file(img->uri)->id;
|
|
} else
|
|
mesh->bind.fs.images[0] = texture_from_file("icons/moon.gif")->id;
|
|
|
|
mesh->bind.fs.samplers[0] = std_sampler;
|
|
}
|
|
|
|
sg_buffer texcoord_floats(float *f, int verts, int comp)
|
|
{
|
|
int n = verts*comp;
|
|
unsigned short packed[n];
|
|
for (int i = 0, v = 0; i < n; i++)
|
|
packed[i] = pack_short_tex(f[i]);
|
|
|
|
return sg_make_buffer(&(sg_buffer_desc){
|
|
.data.ptr = packed,
|
|
.data.size = sizeof(unsigned short) * verts,
|
|
.label = "tex coord vert buffer",
|
|
});
|
|
}
|
|
|
|
sg_buffer normal_floats(float *f, int verts, int comp)
|
|
{
|
|
uint32_t packed_norms[verts];
|
|
for (int v = 0, i = 0; v < verts; v++, i+= comp)
|
|
packed_norms[v] = pack_int10_n2(f+i);
|
|
|
|
return sg_make_buffer(&(sg_buffer_desc){
|
|
.data.ptr = packed_norms,
|
|
.data.size = sizeof(uint32_t) * verts,
|
|
.label = "normal vert buffer",
|
|
});
|
|
}
|
|
|
|
HMM_Vec3 index_to_vert(uint32_t idx, float *f)
|
|
{
|
|
return (HMM_Vec3){f[idx*3], f[idx*3+1], f[idx*3+2]};
|
|
}
|
|
|
|
void mesh_add_primitive(mesh *mesh, cgltf_primitive *prim)
|
|
{
|
|
uint16_t *idxs;
|
|
if (prim->indices) {
|
|
int c = prim->indices->count;
|
|
idxs = malloc(sizeof(*idxs)*c);
|
|
memcpy(idxs, cgltf_buffer_view_data(prim->indices->buffer_view), sizeof(uint16_t) * c);
|
|
|
|
mesh->bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
|
|
.data.ptr = idxs,
|
|
.data.size = sizeof(uint16_t) * c,
|
|
.type = SG_BUFFERTYPE_INDEXBUFFER,
|
|
.label = "mesh index buffer",
|
|
});
|
|
|
|
mesh->idx_count = c;
|
|
} else {
|
|
YughWarn("Model does not have indices. Generating them.");
|
|
int c = prim->attributes[0].data->count;
|
|
|
|
mesh->idx_count = c;
|
|
idxs = malloc(sizeof(*idxs)*c);
|
|
|
|
for (int z = 0; z < c; z++)
|
|
idxs[z] = z;
|
|
|
|
mesh->bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
|
|
.data.ptr = idxs,
|
|
.data.size = sizeof(uint16_t) * c,
|
|
.type = SG_BUFFERTYPE_INDEXBUFFER});
|
|
}
|
|
free(idxs);
|
|
|
|
printf("adding material\n");
|
|
mesh_add_material(mesh, prim->material);
|
|
int has_norm = 0;
|
|
|
|
for (int k = 0; k < prim->attributes_count; k++) {
|
|
cgltf_attribute attribute = prim->attributes[k];
|
|
|
|
int n = cgltf_accessor_unpack_floats(attribute.data, NULL, 0); /* floats per vertex x num elements. In other words, total floats pulled */
|
|
int comp = cgltf_num_components(attribute.data->type);
|
|
int verts = n/comp;
|
|
float vs[n];
|
|
cgltf_accessor_unpack_floats(attribute.data, vs, n);
|
|
|
|
switch (attribute.type) {
|
|
case cgltf_attribute_type_position:
|
|
mesh->bind.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
|
|
.data.ptr = vs,
|
|
.data.size = sizeof(float) * n,
|
|
.label = "mesh vert buffer"
|
|
});
|
|
break;
|
|
|
|
case cgltf_attribute_type_normal:
|
|
has_norm = 1;
|
|
mesh->bind.vertex_buffers[2] = normal_floats(vs, verts, comp);
|
|
break;
|
|
|
|
case cgltf_attribute_type_tangent:
|
|
break;
|
|
|
|
case cgltf_attribute_type_color:
|
|
break;
|
|
|
|
case cgltf_attribute_type_weights:
|
|
break;
|
|
|
|
case cgltf_attribute_type_joints:
|
|
break;
|
|
|
|
case cgltf_attribute_type_texcoord:
|
|
mesh->bind.vertex_buffers[1] = texcoord_floats(vs, verts, comp);
|
|
break;
|
|
case cgltf_attribute_type_invalid:
|
|
YughWarn("Invalid type.");
|
|
break;
|
|
|
|
case cgltf_attribute_type_custom:
|
|
break;
|
|
case cgltf_attribute_type_max_enum:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!has_norm) {
|
|
cgltf_attribute *pa = get_attr_type(prim, cgltf_attribute_type_position);
|
|
int n = cgltf_accessor_unpack_floats(pa->data, NULL,0);
|
|
int comp = 3;
|
|
int verts = n/comp;
|
|
uint32_t face_norms[verts];
|
|
float ps[n];
|
|
cgltf_accessor_unpack_floats(pa->data,ps,n);
|
|
|
|
for (int i = 0; i < verts; i+=3) {
|
|
HMM_Vec3 a = index_to_vert(i,ps);
|
|
HMM_Vec3 b = index_to_vert(i+1,ps);
|
|
HMM_Vec3 c = index_to_vert(i+2,ps);
|
|
HMM_Vec3 norm = HMM_NormV3(HMM_Cross(HMM_SubV3(b,a), HMM_SubV3(c,a)));
|
|
uint32_t packed_norm = pack_int10_n2(norm.Elements);
|
|
face_norms[i] = face_norms[i+1] = face_norms[i+2] = packed_norm;
|
|
}
|
|
|
|
mesh->bind.vertex_buffers[2] = sg_make_buffer(&(sg_buffer_desc){
|
|
.data.ptr = face_norms,
|
|
.data.size = sizeof(uint32_t) * verts});
|
|
}
|
|
}
|
|
|
|
void model_add_cgltf_mesh(model *model, cgltf_mesh *gltf_mesh)
|
|
{
|
|
mesh mesh = {0};
|
|
|
|
for (int i = 0; i < gltf_mesh->primitives_count; i++)
|
|
mesh_add_primitive(&mesh, &gltf_mesh->primitives[i]);
|
|
|
|
arrput(model->meshes,mesh);
|
|
}
|
|
|
|
void model_add_cgltf_anim(model *model, cgltf_animation *anim)
|
|
{
|
|
|
|
}
|
|
|
|
void model_add_cgltf_skin(model *model, cgltf_skin *skin)
|
|
{
|
|
|
|
}
|
|
|
|
void model_process_node(model *model, cgltf_node *node)
|
|
{
|
|
if (node->has_matrix)
|
|
memcpy(model->matrix.Elements, node->matrix, sizeof(float)*16);
|
|
|
|
if (node->mesh)
|
|
model_add_cgltf_mesh(model, node->mesh);
|
|
|
|
if (node->skin)
|
|
model_add_cgltf_skin(model, node->skin);
|
|
}
|
|
|
|
void model_process_scene(model *model, cgltf_scene *scene)
|
|
{
|
|
for (int i = 0; i < scene->nodes_count; i++)
|
|
model_process_node(model, scene->nodes[i]);
|
|
}
|
|
|
|
struct model *model_make(const char *path)
|
|
{
|
|
YughInfo("Making the model from %s.", path);
|
|
cgltf_options options = {0};
|
|
cgltf_data *data = NULL;
|
|
cgltf_result result = cgltf_parse_file(&options, path, &data);
|
|
|
|
if (result) {
|
|
YughError("CGLTF could not parse file %s, err %d.", path, result);
|
|
return NULL;
|
|
}
|
|
|
|
result = cgltf_load_buffers(&options, data, path);
|
|
|
|
if (result) {
|
|
YughError("CGLTF could not load buffers for file %s, err %d.", path, result);
|
|
return NULL;
|
|
}
|
|
|
|
struct model *model = calloc(1, sizeof(*model));
|
|
|
|
if (data->scenes_count == 0 || data->scenes_count > 1) return NULL;
|
|
model_process_scene(model, data->scene);
|
|
|
|
for (int i = 0; i < data->meshes_count; i++)
|
|
model_add_cgltf_mesh(model, &data->meshes[i]);
|
|
|
|
for (int i = 0; i < data->animations_count; i++)
|
|
model_add_cgltf_anim(model, &data->animations[i]);
|
|
|
|
return model;
|
|
}
|
|
|
|
void model_free(model *m)
|
|
{
|
|
|
|
}
|
|
|
|
void model_draw_go(model *model, gameobject *go, gameobject *cam)
|
|
{
|
|
HMM_Mat4 view = t3d_go2world(cam);
|
|
HMM_Mat4 proj = HMM_Perspective_RH_NO(20, 1, 0.01, 10000);
|
|
HMM_Mat4 vp = HMM_MulM4(proj, view);
|
|
|
|
vs_p_t vs_p;
|
|
memcpy(vs_p.vp, vp.Elements, sizeof(float)*16);
|
|
memcpy(vs_p.model, t3d_go2world(go).Elements, sizeof(float)*16);
|
|
|
|
sg_apply_pipeline(model_pipe);
|
|
sg_apply_uniforms(SG_SHADERSTAGE_VS, SLOT_vs_p, SG_RANGE_REF(vs_p));
|
|
|
|
for (int i = 0; i < arrlen(model->meshes); i++) {
|
|
sg_apply_bindings(&model->meshes[i].bind);
|
|
sg_draw(0, model->meshes[i].idx_count, 1);
|
|
}
|
|
}
|
|
|
|
void material_free(material *mat)
|
|
{
|
|
|
|
}
|