diff options
Diffstat (limited to 'source/blender/draw/engines/eevee/shaders/lamps_lib.glsl')
| -rw-r--r-- | source/blender/draw/engines/eevee/shaders/lamps_lib.glsl | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/source/blender/draw/engines/eevee/shaders/lamps_lib.glsl b/source/blender/draw/engines/eevee/shaders/lamps_lib.glsl index 79c04409161..a0b28a02dbc 100644 --- a/source/blender/draw/engines/eevee/shaders/lamps_lib.glsl +++ b/source/blender/draw/engines/eevee/shaders/lamps_lib.glsl @@ -22,14 +22,37 @@ float shadow_cubemap(float shid, vec4 l_vector) ShadowCubeData scd = shadows_cube_data[int(shid)]; vec3 cubevec = -l_vector.xyz / l_vector.w; - float dist = l_vector.w - scd.sh_cube_bias; + float dist = l_vector.w; - float z = texture_octahedron(shadowTexture, vec4(cubevec, shid)).r; +#if defined(SHADOW_VSM) + vec2 moments = texture_octahedron(shadowTexture, vec4(cubevec, shid)).rg; + float p = 0.0; + + if (dist <= moments.x) + p = 1.0; + + float variance = moments.y - (moments.x * moments.x); + variance = max(variance, scd.sh_cube_bias / 10.0); + + float d = moments.x - dist; + float p_max = variance / (variance + d * d); + + // Now reduce light-bleeding by removing the [0, x] tail and linearly rescaling (x, 1] + p_max = clamp((p_max - scd.sh_cube_bleed) / (1.0 - scd.sh_cube_bleed), 0.0, 1.0); - float esm_test = saturate(exp(scd.sh_cube_exp * (z - dist))); - float sh_test = step(0, z - dist); + float vsm_test = max(p, p_max); + return vsm_test; +#elif defined(SHADOW_ESM) + float z = texture_octahedron(shadowTexture, vec4(cubevec, shid)).r; + float esm_test = saturate(exp(scd.sh_cube_exp * (z - (dist - scd.sh_cube_bias)))); return esm_test; + +#else + float z = texture_octahedron(shadowTexture, vec4(cubevec, shid)).r; + float sh_test = step(0, z - (dist - scd.sh_cube_bias)); + return sh_test; +#endif } float shadow_cascade(float shid, vec3 W) |