steffen/VoxelEngine2
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transparent roughness and diffuse settings from app

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zomseffen 2025-02-03 12:42:56 +01:00
parent fbc21ba523
commit 1ecd1c7403
7 changed files with 39 additions and 17 deletions

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shaders/compiled/frag_rt_quad.spv
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15
shaders/rt_quad.frag
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@ -16,6 +16,10 @@ layout(binding = 0) uniform UniformBufferObject {
bool[16] use_geom_shader;
} ubo;
// 0 - location for the maximum number of lights referenced per chunk (also will be the invalid memory allocation for pointing to a nonexistant neighbor)
// 1 - location for the max iterations per light
// 2 - diffuse raster samples (2*n + 1) * (2*n + 1) so as to always have at least the central fragment covered
// 3 - diffuse raster size (float, needs to be decoded)
layout(binding = 2) buffer SceneInfoBuffer{
uint infos[];
} scene_info;
@ -350,8 +354,8 @@ vec3 diffuse_tracing(uint volume_start, uvec2 raster_pos, vec3 pos, uint f) {
vec3 normal = normal_for_facing(f);
// diffuse raytracing using a quadratic raster of rays
int raster_half_steps = 0;
float raster_distance = 0.01;
int raster_half_steps = int(scene_info.infos[2]);
float raster_distance = uintBitsToFloat(scene_info.infos[3]);
int raster_points = (2 * raster_half_steps + 1) * (2 * raster_half_steps + 1);
vec3 color_sum = vec3(0.0, 0.0, 0.0);
@ -389,18 +393,21 @@ vec3 clamp_to_volume(uint volume_start, vec3 position) {
void main() {
vec3 clamped_pos = clamp_to_volume(fragVolumeStart, origPosition);
uvec4 color_roughness = sample_color_from_scene_info(fragVolumeStart, fragRasterPos, facing);
vec3 orig_color_sample = vec3(float(color_roughness.x) / 255.0, float(color_roughness.y) / 255.0, float(color_roughness.z) / 255.0);
vec3 color_sum = diffuse_tracing(fragVolumeStart, fragRasterPos, clamped_pos, facing);
uint orig_neighbor = sample_neighbor_from_scene_info(fragVolumeStart, fragRasterPos, facing);
if (orig_neighbor != 0) {
float pos_infinity = uintBitsToFloat(0x7F800000);
Tracing t = trace_ray(fragVolumeStart, ubo.camera_pos, clamped_pos - ubo.camera_pos, 100.0, 0, 20);
float opacity = float(color_roughness.w) / 255.0;
if (t.has_hit) {
color_sum += diffuse_tracing(t.end_volume, t.end_raster, t.end_pos, t.end_facing);
color_sum = opacity * color_sum + (1.0 - opacity) * diffuse_tracing(t.end_volume, t.end_raster, t.end_pos, t.end_facing) * orig_color_sample;
}
else {
// Todo: hit sky box
color_sum += vec3(0.0, 0.0, 0.0);
color_sum = opacity * color_sum + (1.0 - opacity) * vec3(0.0, 0.0, 0.0);
}
}