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/**
* Debug Shader outputing a gradient of orange - white - blue to mark culling hotspots.
* Green pixels are error pixels that are missing lights from the culling pass (i.e: when culling
* pass is not conservative enough).
*/
#pragma BLENDER_REQUIRE(common_view_lib.glsl)
#pragma BLENDER_REQUIRE(common_math_lib.glsl)
#pragma BLENDER_REQUIRE(eevee_light_lib.glsl)
#pragma BLENDER_REQUIRE(eevee_culling_iter_lib.glsl)
void main(void)
{
float depth = texelFetch(depth_tx, ivec2(gl_FragCoord.xy), 0).r;
float vP_z = get_view_z_from_depth(depth);
vec3 P = get_world_space_from_depth(uvcoordsvar.xy, depth);
float lights_count = 0.0;
uint lights_cull = 0u;
LIGHT_FOREACH_BEGIN_LOCAL (
light_culling, lights_zbins, lights_culling_words, gl_FragCoord.xy, vP_z, l_idx) {
LightData light = lights[l_idx];
lights_cull |= 1u << l_idx;
lights_count += 1.0;
}
LIGHT_FOREACH_END
uint lights_nocull = 0u;
LIGHT_FOREACH_BEGIN_LOCAL_NO_CULL (light_culling, l_idx) {
LightData light = lights[l_idx];
if (distance(light._position, P) < light.influence_radius_max) {
lights_nocull |= 1u << l_idx;
}
}
LIGHT_FOREACH_END
if ((lights_cull & lights_nocull) != lights_nocull) {
/* ERROR. Some lights were culled incorrectly. */
out_debug_color = vec4(0.0, 1.0, 0.0, 1.0);
}
else {
out_debug_color = vec4(heatmap_gradient(lights_count / 4.0), 1.0);
}
}
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