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alessandro bason 2026-03-04 16:50:09 +01:00
parent 7f37187c92
commit 507d635433
7 changed files with 488 additions and 292 deletions
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33
data/obj.glsl
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@ -1,37 +1,50 @@
@ctype mat4 mat4 @ctype mat4 HMM_Mat4
@ctype vec3 HMM_Vec3
@vs vs @vs vs
layout(binding=0) uniform vs_params { layout(binding=0) uniform vs_params {
mat4 mvp; mat4 mvp;
vec3 cam_pos;
}; };
in vec4 position; in vec4 position;
in vec3 norm; in vec3 norm;
in vec2 uv; in vec2 tex_uv;
in vec2 lightmap_uv;
out vec3 fs_norm; out vec3 fs_norm;
out vec2 fs_uv; out vec2 fs_tex_uv;
out vec2 fs_lightmap_uv;
out float depth;
void main() { void main() {
gl_Position = mvp * position; // for now m == identity
vec4 view_pos = mvp * position;
depth = -view_pos.z;
gl_Position = view_pos;
fs_norm = norm; fs_norm = norm;
fs_uv = uv; fs_tex_uv = tex_uv;
fs_lightmap_uv = lightmap_uv;
} }
@end @end
@fs fs @fs fs
layout(binding=0) uniform texture2D tex; layout(binding=0) uniform texture2D tex;
layout(binding=0) uniform sampler smp; layout(binding=0) uniform sampler smp;
layout(binding=1) uniform texture2D lightmap;
layout(binding=1) uniform sampler lightmap_smp;
in vec3 fs_norm; in vec3 fs_norm;
in vec2 fs_uv; in vec2 fs_tex_uv;
in vec2 fs_lightmap_uv;
in float depth;
out vec4 frag_color; out vec4 frag_color;
void main() { void main() {
frag_color = texture(sampler2D(tex, smp), fs_uv); vec4 tex_color = texture(sampler2D(tex, smp), fs_tex_uv);
// frag_color = vec4(fs_norm * 0.5 + 0.5, 1.0); vec4 lightmap_color = texture(sampler2D(lightmap, lightmap_smp), fs_lightmap_uv);
// vec2 uv = fs_uv * 0.5 + 0.5; frag_color = tex_color * lightmap_color;
// frag_color = vec4(uv, 0.0, 1.0);
} }
@end @end

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data/scene.glb Normal file
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data/testino.glb Normal file
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2
src/camera.c
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@ -38,7 +38,7 @@ camera_t cam_init(void) {
void cam_update(camera_t *cam, float dt) { void cam_update(camera_t *cam, float dt) {
float strafe = (float)((int)is_key_down(SAPP_KEYCODE_D) - (int)is_key_down(SAPP_KEYCODE_A)); float strafe = (float)((int)is_key_down(SAPP_KEYCODE_D) - (int)is_key_down(SAPP_KEYCODE_A));
float forward = (float)((int)is_key_down(SAPP_KEYCODE_W) - (int)is_key_down(SAPP_KEYCODE_S)); float forward = (float)((int)is_key_down(SAPP_KEYCODE_W) - (int)is_key_down(SAPP_KEYCODE_S));
float movup = (float)((int)is_key_down(SAPP_KEYCODE_Q) - (int)is_key_down(SAPP_KEYCODE_E)); float movup = (float)((int)is_key_down(SAPP_KEYCODE_E) - (int)is_key_down(SAPP_KEYCODE_Q));
float move_speed = cam->mov_speed * dt; float move_speed = cam->mov_speed * dt;
float look_speed = cam->look_speed * dt; float look_speed = cam->look_speed * dt;

666
src/gen/obj.h
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@ -16,19 +16,20 @@
Attributes: Attributes:
ATTR_obj_position => 0 ATTR_obj_position => 0
ATTR_obj_norm => 1 ATTR_obj_norm => 1
ATTR_obj_uv => 2 ATTR_obj_tex_uv => 2
ATTR_obj_lightmap_uv => 3
Bindings: Bindings:
Uniform block 'vs_params': Uniform block 'vs_params':
C struct: vs_params_t C struct: vs_params_t
Bind slot: UB_vs_params => 0 Bind slot: UB_vs_params => 0
Texture 'tex': Texture 'lightmap':
Image type: SG_IMAGETYPE_2D Image type: SG_IMAGETYPE_2D
Sample type: SG_IMAGESAMPLETYPE_FLOAT Sample type: SG_IMAGESAMPLETYPE_FLOAT
Multisampled: false Multisampled: false
Bind slot: VIEW_tex => 0 Bind slot: VIEW_lightmap => 1
Sampler 'smp': Sampler 'lightmap_smp':
Type: SG_SAMPLERTYPE_FILTERING Type: SG_SAMPLERTYPE_FILTERING
Bind slot: SMP_smp => 0 Bind slot: SMP_lightmap_smp => 1
*/ */
#if !defined(SOKOL_GFX_INCLUDED) #if !defined(SOKOL_GFX_INCLUDED)
#error "Please include sokol_gfx.h before obj.h" #error "Please include sokol_gfx.h before obj.h"
@ -42,135 +43,184 @@
#endif #endif
#define ATTR_obj_position (0) #define ATTR_obj_position (0)
#define ATTR_obj_norm (1) #define ATTR_obj_norm (1)
#define ATTR_obj_uv (2) #define ATTR_obj_tex_uv (2)
#define ATTR_obj_lightmap_uv (3)
#define UB_vs_params (0) #define UB_vs_params (0)
#define VIEW_tex (0) #define VIEW_lightmap (1)
#define SMP_smp (0) #define SMP_lightmap_smp (1)
#pragma pack(push,1) #pragma pack(push,1)
SOKOL_SHDC_ALIGN(16) typedef struct vs_params_t { SOKOL_SHDC_ALIGN(16) typedef struct vs_params_t {
mat4 mvp; HMM_Mat4 mvp;
HMM_Vec3 cam_pos;
uint8_t _pad_76[4];
} vs_params_t; } vs_params_t;
#pragma pack(pop) #pragma pack(pop)
/* /*
cbuffer vs_params : register(b0) cbuffer vs_params : register(b0)
{ {
row_major float4x4 _19_mvp : packoffset(c0); row_major float4x4 _14_mvp : packoffset(c0);
float3 _14_cam_pos : packoffset(c4);
}; };
static float4 gl_Position; static float4 gl_Position;
static float4 position; static float4 position;
static float depth;
static float3 fs_norm; static float3 fs_norm;
static float3 norm; static float3 norm;
static float2 fs_uv; static float2 fs_tex_uv;
static float2 uv; static float2 tex_uv;
static float2 fs_lightmap_uv;
static float2 lightmap_uv;
struct SPIRV_Cross_Input struct SPIRV_Cross_Input
{ {
float4 position : TEXCOORD0; float4 position : TEXCOORD0;
float3 norm : TEXCOORD1; float3 norm : TEXCOORD1;
float2 uv : TEXCOORD2; float2 tex_uv : TEXCOORD2;
float2 lightmap_uv : TEXCOORD3;
}; };
struct SPIRV_Cross_Output struct SPIRV_Cross_Output
{ {
float3 fs_norm : TEXCOORD0; float3 fs_norm : TEXCOORD0;
float2 fs_uv : TEXCOORD1; float2 fs_tex_uv : TEXCOORD1;
float2 fs_lightmap_uv : TEXCOORD2;
float depth : TEXCOORD3;
float4 gl_Position : SV_Position; float4 gl_Position : SV_Position;
}; };
void vert_main() void vert_main()
{ {
gl_Position = mul(position, _19_mvp); float4 _23 = mul(position, _14_mvp);
depth = -_23.z;
gl_Position = _23;
fs_norm = norm; fs_norm = norm;
fs_uv = uv; fs_tex_uv = tex_uv;
fs_lightmap_uv = lightmap_uv;
} }
SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input) SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
{ {
position = stage_input.position; position = stage_input.position;
norm = stage_input.norm; norm = stage_input.norm;
uv = stage_input.uv; tex_uv = stage_input.tex_uv;
lightmap_uv = stage_input.lightmap_uv;
vert_main(); vert_main();
SPIRV_Cross_Output stage_output; SPIRV_Cross_Output stage_output;
stage_output.gl_Position = gl_Position; stage_output.gl_Position = gl_Position;
stage_output.depth = depth;
stage_output.fs_norm = fs_norm; stage_output.fs_norm = fs_norm;
stage_output.fs_uv = fs_uv; stage_output.fs_tex_uv = fs_tex_uv;
stage_output.fs_lightmap_uv = fs_lightmap_uv;
return stage_output; return stage_output;
} }
*/ */
static const uint8_t vs_source_hlsl5[917] = { static const uint8_t vs_source_hlsl5[1380] = {
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}; };
/* /*
Texture2D<float4> tex : register(t0); Texture2D<float4> lightmap : register(t1);
SamplerState smp : register(s0); SamplerState lightmap_smp : register(s1);
static float2 fs_tex_uv;
static float2 fs_lightmap_uv;
static float4 frag_color; static float4 frag_color;
static float2 fs_uv;
static float3 fs_norm; static float3 fs_norm;
static float depth;
struct SPIRV_Cross_Input struct SPIRV_Cross_Input
{ {
float3 fs_norm : TEXCOORD0; float3 fs_norm : TEXCOORD0;
float2 fs_uv : TEXCOORD1; float2 fs_tex_uv : TEXCOORD1;
float2 fs_lightmap_uv : TEXCOORD2;
float depth : TEXCOORD3;
}; };
struct SPIRV_Cross_Output struct SPIRV_Cross_Output
@ -180,59 +230,77 @@ static const uint8_t vs_source_hlsl5[917] = {
void frag_main() void frag_main()
{ {
frag_color = tex.Sample(smp, fs_uv); frag_color = lightmap.Sample(lightmap_smp, fs_lightmap_uv);
} }
SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input) SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
{ {
fs_uv = stage_input.fs_uv; fs_tex_uv = stage_input.fs_tex_uv;
fs_lightmap_uv = stage_input.fs_lightmap_uv;
fs_norm = stage_input.fs_norm; fs_norm = stage_input.fs_norm;
depth = stage_input.depth;
frag_main(); frag_main();
SPIRV_Cross_Output stage_output; SPIRV_Cross_Output stage_output;
stage_output.frag_color = frag_color; stage_output.frag_color = frag_color;
return stage_output; return stage_output;
} }
*/ */
static const uint8_t fs_source_hlsl5[614] = { static const uint8_t fs_source_hlsl5[865] = {
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}; };
/* /*
#version 460 #version 460
@ -240,174 +308,220 @@ static const uint8_t fs_source_hlsl5[614] = {
layout(set = 0, binding = 0, std140) uniform vs_params layout(set = 0, binding = 0, std140) uniform vs_params
{ {
mat4 mvp; mat4 mvp;
} _19; vec3 cam_pos;
} _14;
layout(location = 0) in vec4 position; layout(location = 0) in vec4 position;
layout(location = 3) out float depth;
layout(location = 0) out vec3 fs_norm; layout(location = 0) out vec3 fs_norm;
layout(location = 1) in vec3 norm; layout(location = 1) in vec3 norm;
layout(location = 1) out vec2 fs_uv; layout(location = 1) out vec2 fs_tex_uv;
layout(location = 2) in vec2 uv; layout(location = 2) in vec2 tex_uv;
layout(location = 2) out vec2 fs_lightmap_uv;
layout(location = 3) in vec2 lightmap_uv;
void main() void main()
{ {
gl_Position = _19.mvp * position; vec4 _23 = _14.mvp * position;
depth = -_23.z;
gl_Position = _23;
fs_norm = norm; fs_norm = norm;
fs_uv = uv; fs_tex_uv = tex_uv;
fs_lightmap_uv = lightmap_uv;
} }
*/ */
static const uint8_t vs_bytecode_spirv_vk[1348] = { static const uint8_t vs_bytecode_spirv_vk[1780] = {
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0x38,0x00,0x01,0x00, 0x38,0x00,0x01,0x00,
}; };
/* /*
#version 460 #version 460
layout(set = 1, binding = 0) uniform texture2D tex; layout(set = 1, binding = 1) uniform texture2D lightmap;
layout(set = 1, binding = 32) uniform sampler smp; layout(set = 1, binding = 33) uniform sampler lightmap_smp;
layout(location = 1) in vec2 fs_tex_uv;
layout(location = 2) in vec2 fs_lightmap_uv;
layout(location = 0) out vec4 frag_color; layout(location = 0) out vec4 frag_color;
layout(location = 1) in vec2 fs_uv;
layout(location = 0) in vec3 fs_norm; layout(location = 0) in vec3 fs_norm;
layout(location = 3) in float depth;
void main() void main()
{ {
frag_color = texture(sampler2D(tex, smp), fs_uv); frag_color = texture(sampler2D(lightmap, lightmap_smp), fs_lightmap_uv);
} }
*/ */
static const uint8_t fs_bytecode_spirv_vk[764] = { static const uint8_t fs_bytecode_spirv_vk[916] = {
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0x3d,0x00,0x04,0x00,0x0e,0x00,0x00,0x00,0x11,0x00,0x00,0x00,0x10,0x00,0x00,0x00, 0x15,0x00,0x00,0x00,0x16,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x3b,0x00,0x04,0x00,
0x56,0x00,0x05,0x00,0x12,0x00,0x00,0x00,0x13,0x00,0x00,0x00,0x0d,0x00,0x00,0x00, 0x15,0x00,0x00,0x00,0x19,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x17,0x00,0x04,0x00,
0x11,0x00,0x00,0x00,0x3d,0x00,0x04,0x00,0x14,0x00,0x00,0x00,0x17,0x00,0x00,0x00, 0x1a,0x00,0x00,0x00,0x06,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x20,0x00,0x04,0x00,
0x16,0x00,0x00,0x00,0x57,0x00,0x05,0x00,0x07,0x00,0x00,0x00,0x18,0x00,0x00,0x00, 0x1b,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x1a,0x00,0x00,0x00,0x3b,0x00,0x04,0x00,
0x13,0x00,0x00,0x00,0x17,0x00,0x00,0x00,0x3e,0x00,0x03,0x00,0x09,0x00,0x00,0x00, 0x1b,0x00,0x00,0x00,0x1c,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x20,0x00,0x04,0x00,
0x18,0x00,0x00,0x00,0xfd,0x00,0x01,0x00,0x38,0x00,0x01,0x00, 0x1d,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x06,0x00,0x00,0x00,0x3b,0x00,0x04,0x00,
0x1d,0x00,0x00,0x00,0x1e,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x36,0x00,0x05,0x00,
0x02,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,
0xf8,0x00,0x02,0x00,0x05,0x00,0x00,0x00,0x3d,0x00,0x04,0x00,0x0a,0x00,0x00,0x00,
0x0d,0x00,0x00,0x00,0x0c,0x00,0x00,0x00,0x3d,0x00,0x04,0x00,0x0e,0x00,0x00,0x00,
0x11,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x56,0x00,0x05,0x00,0x12,0x00,0x00,0x00,
0x13,0x00,0x00,0x00,0x0d,0x00,0x00,0x00,0x11,0x00,0x00,0x00,0x3d,0x00,0x04,0x00,
0x14,0x00,0x00,0x00,0x17,0x00,0x00,0x00,0x16,0x00,0x00,0x00,0x57,0x00,0x05,0x00,
0x07,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x13,0x00,0x00,0x00,0x17,0x00,0x00,0x00,
0x3e,0x00,0x03,0x00,0x09,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0xfd,0x00,0x01,0x00,
0x38,0x00,0x01,0x00,
}; };
static inline const sg_shader_desc* obj_shader_desc(sg_backend backend) { static inline const sg_shader_desc* obj_shader_desc(sg_backend backend) {
if (backend == SG_BACKEND_D3D11) { if (backend == SG_BACKEND_D3D11) {
@ -430,21 +544,24 @@ static inline const sg_shader_desc* obj_shader_desc(sg_backend backend) {
desc.attrs[2].base_type = SG_SHADERATTRBASETYPE_FLOAT; desc.attrs[2].base_type = SG_SHADERATTRBASETYPE_FLOAT;
desc.attrs[2].hlsl_sem_name = "TEXCOORD"; desc.attrs[2].hlsl_sem_name = "TEXCOORD";
desc.attrs[2].hlsl_sem_index = 2; desc.attrs[2].hlsl_sem_index = 2;
desc.attrs[3].base_type = SG_SHADERATTRBASETYPE_FLOAT;
desc.attrs[3].hlsl_sem_name = "TEXCOORD";
desc.attrs[3].hlsl_sem_index = 3;
desc.uniform_blocks[0].stage = SG_SHADERSTAGE_VERTEX; desc.uniform_blocks[0].stage = SG_SHADERSTAGE_VERTEX;
desc.uniform_blocks[0].layout = SG_UNIFORMLAYOUT_STD140; desc.uniform_blocks[0].layout = SG_UNIFORMLAYOUT_STD140;
desc.uniform_blocks[0].size = 64; desc.uniform_blocks[0].size = 80;
desc.uniform_blocks[0].hlsl_register_b_n = 0; desc.uniform_blocks[0].hlsl_register_b_n = 0;
desc.views[0].texture.stage = SG_SHADERSTAGE_FRAGMENT; desc.views[1].texture.stage = SG_SHADERSTAGE_FRAGMENT;
desc.views[0].texture.image_type = SG_IMAGETYPE_2D; desc.views[1].texture.image_type = SG_IMAGETYPE_2D;
desc.views[0].texture.sample_type = SG_IMAGESAMPLETYPE_FLOAT; desc.views[1].texture.sample_type = SG_IMAGESAMPLETYPE_FLOAT;
desc.views[0].texture.multisampled = false; desc.views[1].texture.multisampled = false;
desc.views[0].texture.hlsl_register_t_n = 0; desc.views[1].texture.hlsl_register_t_n = 1;
desc.samplers[0].stage = SG_SHADERSTAGE_FRAGMENT; desc.samplers[1].stage = SG_SHADERSTAGE_FRAGMENT;
desc.samplers[0].sampler_type = SG_SAMPLERTYPE_FILTERING; desc.samplers[1].sampler_type = SG_SAMPLERTYPE_FILTERING;
desc.samplers[0].hlsl_register_s_n = 0; desc.samplers[1].hlsl_register_s_n = 1;
desc.texture_sampler_pairs[0].stage = SG_SHADERSTAGE_FRAGMENT; desc.texture_sampler_pairs[0].stage = SG_SHADERSTAGE_FRAGMENT;
desc.texture_sampler_pairs[0].view_slot = 0; desc.texture_sampler_pairs[0].view_slot = 1;
desc.texture_sampler_pairs[0].sampler_slot = 0; desc.texture_sampler_pairs[0].sampler_slot = 1;
desc.label = "obj_shader"; desc.label = "obj_shader";
} }
return &desc; return &desc;
@ -455,29 +572,30 @@ static inline const sg_shader_desc* obj_shader_desc(sg_backend backend) {
if (!valid) { if (!valid) {
valid = true; valid = true;
desc.vertex_func.bytecode.ptr = vs_bytecode_spirv_vk; desc.vertex_func.bytecode.ptr = vs_bytecode_spirv_vk;
desc.vertex_func.bytecode.size = 1348; desc.vertex_func.bytecode.size = 1780;
desc.vertex_func.entry = "main"; desc.vertex_func.entry = "main";
desc.fragment_func.bytecode.ptr = fs_bytecode_spirv_vk; desc.fragment_func.bytecode.ptr = fs_bytecode_spirv_vk;
desc.fragment_func.bytecode.size = 764; desc.fragment_func.bytecode.size = 916;
desc.fragment_func.entry = "main"; desc.fragment_func.entry = "main";
desc.attrs[0].base_type = SG_SHADERATTRBASETYPE_FLOAT; desc.attrs[0].base_type = SG_SHADERATTRBASETYPE_FLOAT;
desc.attrs[1].base_type = SG_SHADERATTRBASETYPE_FLOAT; desc.attrs[1].base_type = SG_SHADERATTRBASETYPE_FLOAT;
desc.attrs[2].base_type = SG_SHADERATTRBASETYPE_FLOAT; desc.attrs[2].base_type = SG_SHADERATTRBASETYPE_FLOAT;
desc.attrs[3].base_type = SG_SHADERATTRBASETYPE_FLOAT;
desc.uniform_blocks[0].stage = SG_SHADERSTAGE_VERTEX; desc.uniform_blocks[0].stage = SG_SHADERSTAGE_VERTEX;
desc.uniform_blocks[0].layout = SG_UNIFORMLAYOUT_STD140; desc.uniform_blocks[0].layout = SG_UNIFORMLAYOUT_STD140;
desc.uniform_blocks[0].size = 64; desc.uniform_blocks[0].size = 80;
desc.uniform_blocks[0].spirv_set0_binding_n = 0; desc.uniform_blocks[0].spirv_set0_binding_n = 0;
desc.views[0].texture.stage = SG_SHADERSTAGE_FRAGMENT; desc.views[1].texture.stage = SG_SHADERSTAGE_FRAGMENT;
desc.views[0].texture.image_type = SG_IMAGETYPE_2D; desc.views[1].texture.image_type = SG_IMAGETYPE_2D;
desc.views[0].texture.sample_type = SG_IMAGESAMPLETYPE_FLOAT; desc.views[1].texture.sample_type = SG_IMAGESAMPLETYPE_FLOAT;
desc.views[0].texture.multisampled = false; desc.views[1].texture.multisampled = false;
desc.views[0].texture.spirv_set1_binding_n = 0; desc.views[1].texture.spirv_set1_binding_n = 1;
desc.samplers[0].stage = SG_SHADERSTAGE_FRAGMENT; desc.samplers[1].stage = SG_SHADERSTAGE_FRAGMENT;
desc.samplers[0].sampler_type = SG_SAMPLERTYPE_FILTERING; desc.samplers[1].sampler_type = SG_SAMPLERTYPE_FILTERING;
desc.samplers[0].spirv_set1_binding_n = 32; desc.samplers[1].spirv_set1_binding_n = 33;
desc.texture_sampler_pairs[0].stage = SG_SHADERSTAGE_FRAGMENT; desc.texture_sampler_pairs[0].stage = SG_SHADERSTAGE_FRAGMENT;
desc.texture_sampler_pairs[0].view_slot = 0; desc.texture_sampler_pairs[0].view_slot = 1;
desc.texture_sampler_pairs[0].sampler_slot = 0; desc.texture_sampler_pairs[0].sampler_slot = 1;
desc.label = "obj_shader"; desc.label = "obj_shader";
} }
return &desc; return &desc;

15
src/main.c
View file

@ -12,6 +12,7 @@
#include "libs/sokol_gfx.h" #include "libs/sokol_gfx.h"
#include "libs/sokol_time.h" #include "libs/sokol_time.h"
#include "libs/sokol_glue.h" #include "libs/sokol_glue.h"
#include "libs/handmademath.h"
#include "vecmath.h" #include "vecmath.h"
@ -31,6 +32,8 @@ scene_t scene = {0};
camera_t camera = {0}; camera_t camera = {0};
u64 time_last = 0; u64 time_last = 0;
vs_params_t vs_params = {0};
//////////////////////////////// ////////////////////////////////
void sokol_log_cb( void sokol_log_cb(
@ -62,6 +65,7 @@ void app_init(void) {
sg_setup(&(sg_desc){ sg_setup(&(sg_desc){
.environment = sglue_environment(), .environment = sglue_environment(),
.logger.func = sokol_log_cb, .logger.func = sokol_log_cb,
.d3d11.shader_debugging = true,
}); });
stm_setup(); stm_setup();
@ -71,7 +75,8 @@ void app_init(void) {
frame_arena = arena_make(ARENA_VIRTUAL, GB(1)); frame_arena = arena_make(ARENA_VIRTUAL, GB(1));
scene = obj_load_gltf(frame_arena, strv("data/metro.glb")); // scene = obj_load_gltf(frame_arena, strv("data/metro.glb"));
scene = obj_load_gltf(frame_arena, strv("data/scene.glb"));
camera = cam_init(); camera = cam_init();
sg_shader shd = sg_make_shader(obj_shader_desc(sg_query_backend())); sg_shader shd = sg_make_shader(obj_shader_desc(sg_query_backend()));
@ -89,6 +94,7 @@ void app_init(void) {
[0].format = SG_VERTEXFORMAT_FLOAT3, [0].format = SG_VERTEXFORMAT_FLOAT3,
[1].format = SG_VERTEXFORMAT_FLOAT3, [1].format = SG_VERTEXFORMAT_FLOAT3,
[2].format = SG_VERTEXFORMAT_FLOAT2, [2].format = SG_VERTEXFORMAT_FLOAT2,
[3].format = SG_VERTEXFORMAT_FLOAT2,
}, },
}, },
}); });
@ -117,13 +123,16 @@ void app_frame(void) {
HMM_Mat4 model = HMM_Translate(HMM_V3(0, 0, -10)); HMM_Mat4 model = HMM_Translate(HMM_V3(0, 0, -10));
// HMM_Mat4 vp = HMM_Mul(HMM_Mul(proj, view), model); // HMM_Mat4 vp = HMM_Mul(HMM_Mul(proj, view), model);
HMM_Mat4 vp = HMM_Mul(proj, view); // HMM_Mat4 vp = HMM_Mul(proj, view);
vs_params.mvp = HMM_Mul(proj, view);
vs_params.cam_pos = camera.pos;
arena_rewind(&frame_arena, 0); arena_rewind(&frame_arena, 0);
sg_begin_pass(&(sg_pass){ .action = pass_action, .swapchain = sglue_swapchain() }); sg_begin_pass(&(sg_pass){ .action = pass_action, .swapchain = sglue_swapchain() });
sg_apply_pipeline(pip); sg_apply_pipeline(pip);
sg_apply_uniforms(0, SG_RANGE_REF(vp)); sg_apply_uniforms(0, SG_RANGE_REF(vs_params));
for (int i = 0; i < scene.object_count; ++i) { for (int i = 0; i < scene.object_count; ++i) {
sg_apply_bindings(&scene.objects[i].bindings); sg_apply_bindings(&scene.objects[i].bindings);
sg_draw(0, scene.objects[i].draw_count, 1); sg_draw(0, scene.objects[i].draw_count, 1);

64
src/obj.c
View file

@ -12,6 +12,7 @@ struct vertex_t {
vec3 pos; vec3 pos;
vec3 norm; vec3 norm;
vec2 tex; vec2 tex;
vec2 lightmap;
}; };
typedef struct material_t material_t; typedef struct material_t material_t;
@ -282,11 +283,32 @@ struct scene_t {
int object_count; int object_count;
}; };
#define CACHE_SIZE (64)
#define MAX_CACHE_NAME_LEN (64)
typedef struct cache_item_t cache_item_t;
struct cache_item_t {
char name[MAX_CACHE_NAME_LEN];
sg_image image;
};
cache_item_t tex_cache[CACHE_SIZE] = {0};
int tex_cache_size = 0;
sg_image obj__load_texture(arena_t scratch, cgltf_texture *texture) { sg_image obj__load_texture(arena_t scratch, cgltf_texture *texture) {
if (!texture || !texture->image) { if (!texture || !texture->image) {
return (sg_image){0}; return (sg_image){0};
} }
cgltf_image *image = texture->image; cgltf_image *image = texture->image;
const char *name = image->name;
for (int i = 0; i < tex_cache_size; ++i) {
if (strcmp(tex_cache[i].name, name) == 0) {
return tex_cache[i].image;
}
}
u8 *bytes = NULL; u8 *bytes = NULL;
usize size = 0; usize size = 0;
if (image->uri) { if (image->uri) {
@ -322,6 +344,13 @@ sg_image obj__load_texture(arena_t scratch, cgltf_texture *texture) {
stbi_image_free(pixels); stbi_image_free(pixels);
cache_item_t *item = &tex_cache[tex_cache_size++];
colla_assert(tex_cache_size < CACHE_SIZE, "texture cache full");
item->image = out;
usize len = strlen(name);
memmove(item->name, name, MIN(len, MAX_CACHE_NAME_LEN));
return out; return out;
} }
@ -360,11 +389,16 @@ scene_t obj_load_gltf(arena_t scratch, strview_t filename) {
colla_assert(data->meshes_count == 1); colla_assert(data->meshes_count == 1);
sg_sampler sampler = sg_make_sampler(&(sg_sampler_desc){ sg_sampler tex_sampler = sg_make_sampler(&(sg_sampler_desc){
.min_filter = SG_FILTER_NEAREST, .min_filter = SG_FILTER_NEAREST,
.mag_filter = SG_FILTER_NEAREST, .mag_filter = SG_FILTER_NEAREST,
}); });
sg_sampler lightmap_sampler = sg_make_sampler(&(sg_sampler_desc){
.min_filter = SG_FILTER_LINEAR,
.mag_filter = SG_FILTER_LINEAR,
});
u32 missing_texture[] = { u32 missing_texture[] = {
0xFFFF00FF, 0x00000000, 0xFFFF00FF, 0x00000000,
0x00000000, 0xFFFF00FF, 0x00000000, 0xFFFF00FF,
@ -399,6 +433,7 @@ scene_t obj_load_gltf(arena_t scratch, strview_t filename) {
cgltf_material *mat = prim->material; cgltf_material *mat = prim->material;
// diffuse texture
cgltf_texture_view texture_view = mat->pbr_metallic_roughness.base_color_texture; cgltf_texture_view texture_view = mat->pbr_metallic_roughness.base_color_texture;
sg_image image = obj__load_texture(scratch, texture_view.texture); sg_image image = obj__load_texture(scratch, texture_view.texture);
if (image.id == 0) { if (image.id == 0) {
@ -407,8 +442,20 @@ scene_t obj_load_gltf(arena_t scratch, strview_t filename) {
sg_view view = sg_make_view(&(sg_view_desc){ sg_view view = sg_make_view(&(sg_view_desc){
.texture.image = image, .texture.image = image,
}); });
obj->bindings.views[0] = view; obj->bindings.views[0] = view;
obj->bindings.samplers[0] = sampler; obj->bindings.samplers[0] = tex_sampler;
// lightmap
sg_image lightmap = missing_img;
if (mat->emissive_texture.texture) {
lightmap = obj__load_texture(scratch, mat->emissive_texture.texture);
}
sg_view lm_view = sg_make_view(&(sg_view_desc){
.texture.image = lightmap,
});
obj->bindings.views[1] = lm_view;
obj->bindings.samplers[1] = lightmap_sampler;
for (usize a = 0; a < prim->attributes_count; ++a) { for (usize a = 0; a < prim->attributes_count; ++a) {
cgltf_attribute *attr = &prim->attributes[a]; cgltf_attribute *attr = &prim->attributes[a];
@ -429,10 +476,19 @@ scene_t obj_load_gltf(arena_t scratch, strview_t filename) {
} }
break; break;
case cgltf_attribute_type_texcoord: case cgltf_attribute_type_texcoord:
for (usize k = 0; k < acc->count; ++k) { {
cgltf_accessor_read_float(acc, k, verts[k].tex.data, 2); if (attr->index == 0) {
for (usize k = 0; k < acc->count; ++k) {
cgltf_accessor_read_float(acc, k, verts[k].tex.data, 2);
}
}
else {
for (usize k = 0; k < acc->count; ++k) {
cgltf_accessor_read_float(acc, k, verts[k].lightmap.data, 2);
}
} }
break; break;
}
default: break; default: break;
} }