496 lines
12 KiB
C
496 lines
12 KiB
C
#include "debugdraw.h"
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#include "openglrender.h"
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#include "shader.h"
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#include "log.h"
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#include <assert.h>
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#include "debug.h"
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#include "window.h"
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#include "2dphysics.h"
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#include "stb_ds.h"
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#include "sokol/sokol_gfx.h"
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#define PAR_STREAMLINES_IMPLEMENTATION
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#include "par/par_streamlines.h"
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#include "font.h"
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static sg_shader point_shader;
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static sg_pipeline point_pipe;
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static sg_bindings point_bind;
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struct point_vertex {
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cpVect pos;
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struct rgba color;
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float radius;
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};
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static int point_c = 0;
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static sg_pipeline grid_pipe;
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static sg_bindings grid_bind;
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static sg_shader grid_shader;
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static int grid_c = 0;
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static sg_pipeline poly_pipe;
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static sg_bindings poly_bind;
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static sg_shader poly_shader;
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static int poly_c = 0;
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static int poly_v = 0;
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struct poly_vertex {
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float pos[2];
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float uv[2];
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struct rgba color;
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};
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static sg_pipeline circle_pipe;
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static sg_bindings circle_bind;
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static sg_shader csg;
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static int circle_count = 0;
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static int circle_vert_c = 7;
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struct circle_vertex {
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float pos[2];
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float radius;
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struct rgba color;
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};
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void debug_flush()
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{
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sg_apply_pipeline(circle_pipe);
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sg_apply_bindings(&circle_bind);
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sg_apply_uniforms(SG_SHADERSTAGE_VS, 0, SG_RANGE_REF(projection));
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sg_draw(0,4,circle_count);
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circle_count = 0;
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sg_apply_pipeline(poly_pipe);
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sg_apply_bindings(&poly_bind);
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sg_apply_uniforms(SG_SHADERSTAGE_VS,0,SG_RANGE_REF(projection));
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sg_draw(0,poly_c,1);
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poly_c = 0;
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poly_v = 0;
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sg_apply_pipeline(point_pipe);
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sg_apply_bindings(&point_bind);
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sg_apply_uniforms(SG_SHADERSTAGE_VS,0,SG_RANGE_REF(projection));
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sg_draw(0,point_c,1);
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point_c = 0;
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}
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static sg_shader_uniform_block_desc projection_ubo = {
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.size = sizeof(projection),
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.uniforms = {
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[0] = { .name = "proj", .type = SG_UNIFORMTYPE_MAT4 },
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}
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};
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sg_blend_state blend_trans = {
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.enabled = true,
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.src_factor_rgb = SG_BLENDFACTOR_SRC_ALPHA,
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.dst_factor_rgb = SG_BLENDFACTOR_ONE_MINUS_SRC_ALPHA,
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.src_factor_alpha = SG_BLENDFACTOR_SRC_ALPHA,
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.src_factor_alpha = SG_BLENDFACTOR_ONE_MINUS_SRC_ALPHA
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};
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void debugdraw_init()
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{
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point_shader = sg_make_shader(&(sg_shader_desc){
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.vs.source = slurp_text("shaders/point_v.glsl"),
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.fs.source = slurp_text("shaders/point_f.glsl"),
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.vs.uniform_blocks[0] = projection_ubo
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});
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point_pipe = sg_make_pipeline(&(sg_pipeline_desc){
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.shader = point_shader,
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.layout = {
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.attrs = {
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[0].format = SG_VERTEXFORMAT_FLOAT2, /* pos */
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[1].format = SG_VERTEXFORMAT_UBYTE4N, /* color */
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[2].format = SG_VERTEXFORMAT_FLOAT /* radius */
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}
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},
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.primitive_type = SG_PRIMITIVETYPE_POINTS,
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.colors[0].blend = blend_trans
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});
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point_bind.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
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.size = sizeof(struct point_vertex)*5000,
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.usage = SG_USAGE_STREAM
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});
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csg = sg_make_shader(&(sg_shader_desc){
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.vs.source = slurp_text("shaders/circlevert.glsl"),
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.fs.source = slurp_text("shaders/circlefrag.glsl"),
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.vs.uniform_blocks[0] = projection_ubo,
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});
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circle_pipe = sg_make_pipeline(&(sg_pipeline_desc){
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.shader = csg,
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.layout = {
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.attrs = {
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[0].format = SG_VERTEXFORMAT_FLOAT2,
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[0].buffer_index = 1,
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[1].format = SG_VERTEXFORMAT_FLOAT2,
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[2].format = SG_VERTEXFORMAT_FLOAT,
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[3].format = SG_VERTEXFORMAT_UBYTE4N
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},
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.buffers[0].step_func = SG_VERTEXSTEP_PER_INSTANCE,
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},
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.primitive_type = SG_PRIMITIVETYPE_TRIANGLE_STRIP,
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.cull_mode = SG_CULLMODE_BACK,
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.colors[0].blend = blend_trans,
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.label = "circle pipeline"
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});
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circle_bind.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
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.size = sizeof(float)*circle_vert_c*5000,
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.usage = SG_USAGE_STREAM,
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});
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float circleverts[8] = {
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-1,-1,
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-1,1,
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1,-1,
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1,1
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};
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circle_bind.vertex_buffers[1] = sg_make_buffer(&(sg_buffer_desc){
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.data = SG_RANGE(circleverts),
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.usage = SG_USAGE_IMMUTABLE,
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});
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grid_shader = sg_make_shader(&(sg_shader_desc){
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.vs.source = slurp_text("shaders/gridvert.glsl"),
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.fs.source = slurp_text("shaders/gridfrag.glsl"),
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.vs.uniform_blocks[0] = projection_ubo,
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.vs.uniform_blocks[1] = {
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.size = sizeof(float)*2,
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.uniforms = { [0] = { .name = "offset", .type = SG_UNIFORMTYPE_FLOAT2 } } },
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.fs.uniform_blocks[0] = {
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.size = sizeof(float)*6,
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.uniforms = {
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[0] = { .name = "thickness", .type = SG_UNIFORMTYPE_FLOAT },
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[1] = { .name = "span", .type = SG_UNIFORMTYPE_FLOAT },
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[2] = { .name = "color", .type = SG_UNIFORMTYPE_FLOAT4 },
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}
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},
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});
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grid_pipe = sg_make_pipeline(&(sg_pipeline_desc){
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.shader = grid_shader,
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.layout = {
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.attrs = {
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[0].format = SG_VERTEXFORMAT_FLOAT2, /* pos */
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}
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},
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.primitive_type = SG_PRIMITIVETYPE_TRIANGLE_STRIP,
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// .cull_mode = sg_cullmode_back,
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.label = "grid pipeline",
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.colors[0].blend = blend_trans,
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});
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grid_bind.vertex_buffers[0] = circle_bind.vertex_buffers[1];
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poly_shader = sg_make_shader(&(sg_shader_desc){
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.vs.source = slurp_text("shaders/poly_v.glsl"),
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.fs.source = slurp_text("shaders/poly_f.glsl"),
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.vs.uniform_blocks[0] = projection_ubo
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});
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poly_pipe = sg_make_pipeline(&(sg_pipeline_desc){
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.shader = poly_shader,
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.layout = {
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.attrs = { [0].format = SG_VERTEXFORMAT_FLOAT2, /* pos */
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[1].format = SG_VERTEXFORMAT_FLOAT2, /* uv */
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[2].format = SG_VERTEXFORMAT_UBYTE4N /* color rgba */
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}
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},
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.index_type = SG_INDEXTYPE_UINT32,
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.colors[0].blend = blend_trans,
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});
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poly_bind.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
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.size = sizeof(struct poly_vertex)*1000,
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.usage = SG_USAGE_STREAM,
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.type = SG_BUFFERTYPE_VERTEXBUFFER,
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});
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poly_bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
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.size = sizeof(uint32_t)*6*1000,
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.usage = SG_USAGE_STREAM,
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.type = SG_BUFFERTYPE_INDEXBUFFER
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});
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}
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void draw_line(cpVect s, cpVect e, struct rgba color)
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{
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cpVect verts[2] = {s, e};
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draw_poly(verts, 2, color);
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}
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cpVect center_of_vects(cpVect *v, int n)
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{
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cpVect c;
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for (int i = 0; i < n; i++) {
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c.x += v[i].x;
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c.y += v[i].y;
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}
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c.x /= n;
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c.y /= n;
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return c;
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}
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float vecs2m(cpVect a, cpVect b)
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{
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return (b.y-a.y)/(b.x-a.x);
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}
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cpVect inflatepoint(cpVect a, cpVect b, cpVect c, float d)
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{
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cpVect ba = cpvnormalize(cpvsub(a,b));
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cpVect bc = cpvnormalize(cpvsub(c,b));
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cpVect avg = cpvadd(ba, bc);
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avg = cpvmult(avg, 0.5);
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float dot = cpvdot(ba, bc);
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dot /= cpvlength(ba);
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dot /= cpvlength(bc);
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float mid = acos(dot)/2;
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avg = cpvnormalize(avg);
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return cpvadd(b, cpvmult(avg, d/sin(mid)));
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}
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void inflatepoints(cpVect *r, cpVect *p, float d, int n)
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{
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if (d == 0) {
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for (int i = 0; i < n; i++)
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r[i] = p[i];
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return;
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}
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if (cpveql(p[0], p[n-1])) {
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r[0] = inflatepoint(p[n-2],p[0],p[1],d);
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r[n-1] = r[0];
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} else {
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cpVect outdir = cpvmult(cpvnormalize(cpvsub(p[0],p[1])),fabs(d));
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cpVect perp;
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if (d > 0)
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perp = cpvperp(outdir);
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else
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perp = cpvrperp(outdir);
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r[0] = cpvadd(p[0],cpvadd(outdir,perp));
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outdir = cpvmult(cpvnormalize(cpvsub(p[n-1],p[n-2])),fabs(d));
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if (d > 0)
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perp = cpvrperp(outdir);
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else
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perp = cpvperp(outdir);
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r[n-1] = cpvadd(p[n-1],cpvadd(outdir,perp));
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}
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for (int i = 0; i < n-2; i++)
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r[i+1] = inflatepoint(p[i],p[i+1],p[i+2], d);
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}
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void draw_edge(cpVect *points, int n, struct rgba color, int thickness, int closed, int flags)
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{
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static_assert(sizeof(cpVect) == 2*sizeof(float));
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/* todo: should be dashed, and filled. use a texture. */
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/* draw polygon outline */
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parsl_position par_v[n];
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for (int i = 0; i < n; i++) {
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par_v[i].x = points[i].x;
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par_v[i].y = points[i].y;
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}
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uint16_t spine_lens[] = {n};
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parsl_context *par_ctx = parsl_create_context((parsl_config){
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.thickness = 1,
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.flags = PARSL_FLAG_ANNOTATIONS
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});
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parsl_mesh *mesh = parsl_mesh_from_lines(par_ctx, (parsl_spine_list){
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.num_vertices = n,
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.num_spines = 1,
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.vertices = par_v,
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.spine_lengths = spine_lens,
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.closed = closed
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});
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for (int i = 0; i < mesh->num_triangles*3; i++)
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mesh->triangle_indices[i] += poly_v;
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sg_range it = {
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.ptr = mesh->triangle_indices,
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.size = sizeof(uint32_t)*mesh->num_triangles*3
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};
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struct poly_vertex vertices[mesh->num_vertices];
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for (int i = 0; i < mesh->num_vertices; i++) {
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vertices[i].pos[0] = mesh->positions[i].x;
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vertices[i].pos[1] = mesh->positions[i].y;
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vertices[i].uv[0] = mesh->annotations[i].u_along_curve;
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vertices[i].uv[1] = mesh->annotations[i].v_across_curve;
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vertices[i].color = color;
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}
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sg_range vvt = {
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.ptr = vertices,
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.size = sizeof(struct poly_vertex)*mesh->num_vertices
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};
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sg_append_buffer(poly_bind.vertex_buffers[0], &vvt);
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sg_append_buffer(poly_bind.index_buffer, &it);
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poly_c += mesh->num_triangles*3;
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poly_v += mesh->num_vertices;
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parsl_destroy_context(par_ctx);
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}
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void draw_circle(int x, int y, float radius, int pixels, struct rgba color, int fill)
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{
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struct circle_vertex cv;
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cv.pos[0] = x;
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cv.pos[1] = y;
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cv.radius = radius;
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cv.color = color;
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sg_append_buffer(circle_bind.vertex_buffers[0], SG_RANGE_REF(cv));
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circle_count++;
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}
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void draw_rect(int x, int y, int w, int h, struct rgba color)
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{
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float hw = w / 2.f;
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float hh = h / 2.f;
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cpVect verts[4] = {
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{ .x = x-hw, .y = y-hh },
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{ .x = x+hw, .y = y-hh },
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{ .x = x+hw, .y = y+hh },
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{ .x = x-hw, .y = y+hh }
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};
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draw_poly(verts, 4, color);
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}
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void draw_box(struct cpVect c, struct cpVect wh, struct rgba color)
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{
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draw_rect(c.x, c.y, wh.x, wh.y, color);
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}
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void draw_arrow(struct cpVect start, struct cpVect end, struct rgba color, int capsize)
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{
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draw_line(start, end, color);
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draw_cppoint(end, capsize, color);
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}
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void draw_grid(int width, int span, struct rgba color)
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{
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cpVect offset = cam_pos();
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offset = cpvmult(offset, 1/cam_zoom());
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offset.x -= mainwin->width/2;
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offset.y -= mainwin->height/2;
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sg_apply_pipeline(grid_pipe);
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sg_apply_bindings(&grid_bind);
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float col[4] = { color.r/255.0 ,color.g/255.0 ,color.b/255.0 ,color.a/255.0 };
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float fubo[6];
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fubo[0] = 1;
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fubo[1] = span;
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memcpy(&fubo[2], col, sizeof(float)*4);
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sg_apply_uniforms(SG_SHADERSTAGE_VS, 0, SG_RANGE_REF(projection));
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sg_apply_uniforms(SG_SHADERSTAGE_VS, 1, SG_RANGE_REF(offset));
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sg_apply_uniforms(SG_SHADERSTAGE_FS, 0, SG_RANGE_REF(fubo));
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sg_draw(0,4,1);
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}
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void draw_point(int x, int y, float r, struct rgba color)
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{
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struct point_vertex p;
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p.pos.x = x;
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p.pos.y = y;
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p.color = color;
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p.radius = r;
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sg_range pt = {
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.ptr = &p,
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.size = sizeof(p)
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};
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sg_append_buffer(point_bind.vertex_buffers[0], &pt);
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point_c++;
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}
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void draw_cppoint(struct cpVect point, float r, struct rgba color)
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{
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draw_point(point.x, point.y, r, color);
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}
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void draw_points(struct cpVect *points, int n, float size, struct rgba color)
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{
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for (int i = 0; i < n; i++)
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draw_point(points[i].x, points[i].y, size, color);
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}
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void draw_poly(cpVect *points, int n, struct rgba color)
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{
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draw_edge(points,n,color,1,1,0);
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color.a = 40;
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/* Find polygon mesh */
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int tric = n - 2;
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if (n < 1) return;
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uint32_t tridxs[tric*3];
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for (int i = 2, ti = 0; i < n; i++, ti+=3) {
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tridxs[ti] = 0;
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tridxs[ti+1] = i-1;
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tridxs[ti+2] = i;
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}
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for (int i = 0; i < tric*3; i++)
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tridxs[i] += poly_v;
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sg_range trip = {
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.ptr = tridxs,
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.size = sizeof(uint32_t)*3*tric
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};
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struct poly_vertex polyverts[n];
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for (int i = 0; i < n; i++) {
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polyverts[i].pos[0] = points[i].x;
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polyverts[i].pos[1] = points[i].y;
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polyverts[i].uv[0] = 0.0;
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polyverts[i].uv[1] = 0.0;
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polyverts[i].color = color;
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}
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sg_range ppp = {
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.ptr = polyverts,
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.size = sizeof(struct poly_vertex)*n
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};
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sg_append_buffer(poly_bind.vertex_buffers[0], &ppp);
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sg_append_buffer(poly_bind.index_buffer, &trip);
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poly_c += tric*3;
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poly_v += n;
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}
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void debugdraw_flush()
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{
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}
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