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~ | Working atrous algorithm

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TheRedShip
2025-02-08 21:43:49 +01:00
parent cbc2550d78
commit 39196a00ff
12 changed files with 121 additions and 39 deletions
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2
includes/RT/Shader.hpp
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@ -54,6 +54,8 @@ class Shader
GLuint _output_texture;
GLuint _accumulation_texture;
GLuint _denoising_texture;
GLuint _normal_texture;
GLuint _position_texture;
GLuint _vertex;
GLuint _fragment;

12
scenes/pillard.rt
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@ -85,10 +85,10 @@ cy +10.00 +3.000 +15.00 1.5 4.8 +0.000 +1.000 +0.000 5
cy +10.00 +3.000 +25.00 1.5 4.8 +0.000 +1.000 +0.000 5
qu -35 0 -40 0 20 0 70 0 0 5
qu 35 0 -40 0 20 0 0 0 100 5
qu -35 0 -40 0 20 0 0 0 100 5
qu -50 +20 -50 100 0 0 0 0 100 5
qu -50 0 -50 100 0 0 0 0 100 5
qu -35 0 -40 0 20 0 70 0 0 0 5
qu 35 0 -40 0 20 0 0 0 100 0 5
qu -35 0 -40 0 20 0 0 0 100 0 5
qu -50 +20 -50 100 0 0 0 0 100 0 5
qu -50 0 -50 100 0 0 0 0 100 0 5
# qu -35 0 50 0 20 0 70 0 0 5
# qu -35 0 50 0 20 0 70 0 0 0 5

2
scenes/roughness.rt
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@ -40,5 +40,5 @@ sp 2.4 1.5 -1 1.5 14
// light quad
qu -1 2.999 -1 0 0 2 2 0 0 0
qu -1 2.999 -1 0 0 2 2 0 0 0 0

2
scenes/stairs.rt
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@ -3,7 +3,7 @@ CAM -7 10 6 -19.4 -50 0.081 9.417 80.368 10
MAT 255 255 255 2.0 0.0 0.0 //white light
sp -10 100 10 50 0
qu -2.5 15 -9 7 0 0 0 0 7 0
qu -2.5 15 -9 7 0 0 0 0 7 0 0
MAT 255 100 10 0.0 0.5 1.0

16
scenes/volumetric.rt
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@ -2,7 +2,7 @@ CAM 1.61759 3.23371 -7.26417 -4.0001 105.199 0 2.973 45.75
MAT 255 255 255 2.0 1.0 0.0 // 0 white light
# sp -3.5 2.7 0.5 0.2 0
qu -4 2.375 0 0 0.25 0 0 0 0.25 0
qu -4 2.375 0 0 0.25 0 0 0 0.25 0 0
MAT 250 250 250 0. 1.0 0.0 // 1 white
MAT 250 100 100 0. 1.0 0.0 // 2 red
@ -11,15 +11,15 @@ MAT 100 100 250 0. 1.0 0.0 // 3 blue
MAT 250 250 250 0. 1.0 0.05 // 1 white tomato
MAT 250 250 250 0. 1.3 0. DIE -1 // 1 white dielectric
qu 2.5 0 -2.5 0 5 0 0 0 5 1
qu -2.5 0 2.5 0 5 0 5 0 0 2
qu -2.5 0 -2.5 0 0 5 5 0 0 1
qu 2.5 0 -2.5 0 5 0 0 0 5 0 1
qu -2.5 0 2.5 0 5 0 5 0 0 0 2
qu -2.5 0 -2.5 0 0 5 5 0 0 0 1
qu -2.5 0 -2.5 0 2.375 0 0 0 5 3
qu -2.5 2.6275 -2.5 0 2.375 0 0 0 5 3
qu -2.5 0 -2.5 0 2.375 0 0 0 5 0 3
qu -2.5 2.6275 -2.5 0 2.375 0 0 0 5 0 3
qu -2.5 2 0.25 0 1 0 0 0 2.75 3
qu -2.5 2 -2.5 0 1 0 0 0 2.5 3
qu -2.5 2 0.25 0 1 0 0 0 2.75 0 3
qu -2.5 2 -2.5 0 1 0 0 0 2.5 0 3
sp 1.25 1 -1 1.5 4

10
scenes/window.rt
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@ -8,12 +8,12 @@ MAT 255 255 255 5.0 0.0 0.0 //light
pl 0 0 0 0 1 0 1
sp -10 10 -9 1 2
# qu -10 5 -12 0 6 0 0 0 6 2
# qu -10 5 -12 0 6 0 0 0 6 0 2
qu 0 0 0 0 6 0 18 0 0 0
qu 0 0 -18 0 6 0 18 0 0 0
qu 18 0 -18 0 6 0 0 0 18 0
qu 0 6 -18 18 0 0 0 0 18 0
qu 0 0 0 0 6 0 18 0 0 0 0
qu 0 0 -18 0 6 0 18 0 0 0 0
qu 18 0 -18 0 6 0 0 0 18 0 0
qu 0 6 -18 18 0 0 0 0 18 0 0
cu 0.25 3 -0.25 0.5 6 0.5 0
cu 0.25 3 -1.25 0.5 6 0.5 0

18
scenes/window2.rt
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@ -7,21 +7,21 @@ MAT 255 255 255 1.0 0.0 0.0 //light
sp -5 5 0 1 2
# qu -5 0 -2.5 0 5 0 0 0 5 2
# qu -5 0 -2.5 0 5 0 0 0 5 0 2
pl 0 0 0 0 1 0 1
qu 2.5 0 -2.5 0 5 0 0 0 5 0
qu -2.5 0 -2.5 0 5 0 5 0 0 0
qu -2.5 0 2.5 0 5 0 5 0 0 0
qu -2.5 5 -2.5 0 0 5 5 0 0 0
qu 2.5 0 -2.5 0 5 0 0 0 5 0 0
qu -2.5 0 -2.5 0 5 0 5 0 0 0 0
qu -2.5 0 2.5 0 5 0 5 0 0 0 0
qu -2.5 5 -2.5 0 0 5 5 0 0 0 0
qu -2.5 0 -2.5 0 2.5 0 0 0 5 0
qu -2.5 3.5 -2.5 0 1.5 0 0 0 5 0
qu -2.5 0 -2.5 0 2.5 0 0 0 5 0 0
qu -2.5 3.5 -2.5 0 1.5 0 0 0 5 0 0
qu -2.5 2.5 0.5 0 1 0 0 0 2 0
qu -2.5 2.5 -2.5 0 1 0 0 0 2 0
qu -2.5 2.5 0.5 0 1 0 0 0 2 0 0
qu -2.5 2.5 -2.5 0 1 0 0 0 2 0 0

9
shaders/compute.glsl
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@ -4,6 +4,9 @@ layout(local_size_x = 16, local_size_y = 16) in;
layout(binding = 0, rgba32f) uniform image2D output_image;
layout(binding = 1, rgba32f) uniform image2D accumulation_image;
layout(binding = 3, rgba32f) uniform image2D normal_texture;
layout(binding = 4, rgba32f) uniform image2D position_texture;
struct GPUObject {
mat4 rotation;
@ -193,6 +196,12 @@ vec3 pathtrace(Ray ray, inout uint rng_state)
break;
}
if (i == 0)
{
imageStore(normal_texture, ivec2(gl_GlobalInvocationID.xy), vec4(hit.normal, 1.0));
imageStore(position_texture, ivec2(gl_GlobalInvocationID.xy), vec4(hit.position, 1.0));
}
float p = max(color.r, max(color.g, color.b));
if (randomValue(rng_state) >= p) break;
color /= max(p, 0.001);

57
shaders/denoising.glsl
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@ -4,7 +4,12 @@ layout(local_size_x = 16, local_size_y = 16) in;
layout(binding = 0, rgba32f) uniform image2D read_texture;
layout(binding = 2, rgba32f) uniform image2D write_texture;
layout(binding = 3, rgba32f) uniform image2D position_texture;
layout(binding = 4, rgba32f) uniform image2D normal_texture;
uniform vec2 u_resolution;
uniform int u_pass;
void main()
{
@ -12,9 +17,55 @@ void main()
if (pixel_coords.x >= int(u_resolution.x) || pixel_coords.y >= int(u_resolution.y))
return;
vec4 color = imageLoad(read_texture, pixel_coords);
float c_phi = 1.0;
float p_phi = 1.0;
float n_phi = 1.0;
color *= 0.5;
int holes = int(pow(2, u_pass));
imageStore(write_texture, pixel_coords, color);
vec4 color_center = imageLoad(read_texture, pixel_coords);
vec3 position_center = imageLoad(position_texture, pixel_coords).xyz;
vec3 normal_center = imageLoad(normal_texture, pixel_coords).xyz;
float kernel[5] = float[5](1.0/16.0, 1.0/4.0, 3.0/8.0, 1.0/4.0, 1.0/16.0);
float totalWeight = 0.;
vec4 color = vec4(vec3(0.), 1.0);
for (int x = -2; x <= 2; x++)
{
for (int y = -2; y <= 2; y++)
{
ivec2 coords = pixel_coords + ivec2(x * holes, y * holes);
if (coords.x < 0. || coords.y < 0. || coords.x >= int(u_resolution.x) || coords.y >= int(u_resolution.y))
continue ;
// coords = clamp(coords, ivec2(-1.0), u_resolution);
vec4 color_sample = imageLoad(read_texture, coords);
vec3 position_sample = imageLoad(position_texture, coords).xyz;
vec3 normal_sample = imageLoad(normal_texture, coords).xyz;
// Calculate edge-stopping weights
// Color weight
float colorDist = distance(color_center, color_sample);
float w_c = exp(-colorDist / c_phi);
// Position weight
float posDist = distance(position_center, position_sample);
float w_p = exp(-posDist / p_phi);
// Normal weight
float normalDist = distance(normal_center, normal_sample);
float w_n = exp(-normalDist / n_phi);
float weight = kernel[x+2] * kernel[y+2] * w_c * w_p * w_n;
color += color_sample * weight;
totalWeight += weight;
}
}
imageStore(write_texture, pixel_coords, color / totalWeight);
}

6
shaders/light.glsl
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@ -2,7 +2,7 @@ hitInfo traceRay(Ray ray);
vec3 GetEnvironmentLight(Ray ray)
{
// return vec3(0.);
return vec3(0.);
vec3 sun_pos = vec3(-0.5, 0.5, 0.5);
float SunFocus = 1.5;
float SunIntensity = 1.;
@ -65,7 +65,7 @@ vec3 sampleQuadLight(vec3 position, GPUObject obj, int light_index, GPUMaterial
vec3 normal = normalize(crossQuad);
float cos_theta = max(0.0, dot(normal, -light_dir));
return mat.emission * mat.color / (light_dist);
return mat.emission * mat.color / (light_dist * light_dist) * pdf;
}
vec3 sampleLights(vec3 position, inout uint rng_state)
@ -134,6 +134,6 @@ void calculateLightColor(GPUMaterial mat, hitInfo hit, inout vec3 color, inou
{
color *= mat.color;
light += mat.emission * mat.color;
// light += sampleLights(hit.position, rng_state);
}
// light += sampleLights(hit.position, rng_state);
}

4
srcs/RT.cpp
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@ -145,10 +145,12 @@ int main(int argc, char **argv)
glUseProgram(shader.getProgramComputeDenoising());
glUniform2fv(glGetUniformLocation(shader.getProgramComputeDenoising(), "u_resolution"), 1, glm::value_ptr(glm::vec2(WIDTH, HEIGHT)));
for (int pass = 0; pass < 1; ++pass)
for (int pass = 0; pass < 4; ++pass)
{
shader.flipOutputDenoising(pass % 2 == 0);
glUniform1i(glGetUniformLocation(shader.getProgramComputeDenoising(), "u_pass"), pass);
glDispatchCompute((WIDTH + 15) / 16, (HEIGHT + 15) / 16, 1);
glMemoryBarrier(GL_SHADER_IMAGE_ACCESS_BARRIER_BIT);
}

20
srcs/class/Shader.cpp
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@ -137,7 +137,7 @@ void Shader::attach(void)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, WIDTH, HEIGHT, 0, GL_RGBA, GL_FLOAT, NULL);
glBindImageTexture(0, _output_texture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA32F);
glBindImageTexture(0, _output_texture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_RGBA32F);
glGenTextures(1, &_accumulation_texture);
glBindTexture(GL_TEXTURE_2D, _accumulation_texture);
@ -156,6 +156,24 @@ void Shader::attach(void)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, WIDTH, HEIGHT, 0, GL_RGBA, GL_FLOAT, NULL);
glBindImageTexture(2, _denoising_texture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_RGBA32F);
glGenTextures(1, &_normal_texture);
glBindTexture(GL_TEXTURE_2D, _normal_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, WIDTH, HEIGHT, 0, GL_RGBA, GL_FLOAT, NULL);
glBindImageTexture(3, _normal_texture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_RGBA32F);
glGenTextures(1, &_position_texture);
glBindTexture(GL_TEXTURE_2D, _position_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, WIDTH, HEIGHT, 0, GL_RGBA, GL_FLOAT, NULL);
glBindImageTexture(4, _position_texture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_RGBA32F);
}
void Shader::checkCompileErrors(GLuint shader)