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Merge pull request #100544 from Namey5/sdfgi-sky-rotation

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Support custom sky rotation in SDFGI
This commit is contained in:
Thaddeus Crews
2024-12-19 19:59:46 -06:00
parent 95b00295fb e4fd2f003f
commit 41b468f961
3 changed files with 44 additions and 30 deletions
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25
servers/rendering/renderer_rd/shaders/environment/sdfgi_integrate.glsl
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@@ -49,9 +49,9 @@ layout(set = 1, binding = 1) uniform sampler linear_sampler_mipmaps;
#define HISTORY_BITS 10
#define SKY_MODE_DISABLED 0
#define SKY_MODE_COLOR 1
#define SKY_MODE_SKY 2
#define SKY_FLAGS_MODE_COLOR 0x01
#define SKY_FLAGS_MODE_SKY 0x02
#define SKY_FLAGS_ORIENTATION_SIGN 0x04
layout(push_constant, std430) uniform Params {
vec3 grid_size;
@@ -67,12 +67,12 @@ layout(push_constant, std430) uniform Params {
ivec2 image_size;
ivec3 world_offset;
uint sky_mode;
uint sky_flags;
ivec3 scroll;
float sky_energy;
vec3 sky_color;
vec3 sky_color_or_orientation;
float y_mult;
bool store_ambient_texture;
@@ -265,17 +265,22 @@ void main() {
}
}
} else if (params.sky_mode == SKY_MODE_SKY) {
} else if (bool(params.sky_flags & SKY_FLAGS_MODE_SKY)) {
// Reconstruct sky orientation as quaternion and rotate ray_dir before sampling.
float sky_sign = bool(params.sky_flags & SKY_FLAGS_ORIENTATION_SIGN) ? 1.0 : -1.0;
vec4 sky_quat = vec4(params.sky_color_or_orientation, sky_sign * sqrt(1.0 - dot(params.sky_color_or_orientation, params.sky_color_or_orientation)));
vec3 sky_dir = cross(sky_quat.xyz, ray_dir);
sky_dir = ray_dir + ((sky_dir * sky_quat.w) + cross(sky_quat.xyz, sky_dir)) * 2.0;
#ifdef USE_CUBEMAP_ARRAY
light.rgb = textureLod(samplerCubeArray(sky_irradiance, linear_sampler_mipmaps), vec4(ray_dir, 0.0), 2.0).rgb; // Use second mipmap because we don't usually throw a lot of rays, so this compensates.
light.rgb = textureLod(samplerCubeArray(sky_irradiance, linear_sampler_mipmaps), vec4(sky_dir, 0.0), 2.0).rgb; // Use second mipmap because we don't usually throw a lot of rays, so this compensates.
#else
light.rgb = textureLod(samplerCube(sky_irradiance, linear_sampler_mipmaps), ray_dir, 2.0).rgb; // Use second mipmap because we don't usually throw a lot of rays, so this compensates.
light.rgb = textureLod(samplerCube(sky_irradiance, linear_sampler_mipmaps), sky_dir, 2.0).rgb; // Use second mipmap because we don't usually throw a lot of rays, so this compensates.
#endif
light.rgb *= params.sky_energy;
light.a = 0.0;
} else if (params.sky_mode == SKY_MODE_COLOR) {
light.rgb = params.sky_color;
} else if (bool(params.sky_flags & SKY_FLAGS_MODE_COLOR)) {
light.rgb = params.sky_color_or_orientation;
light.rgb *= params.sky_energy;
light.a = 0.0;
} else {