diff options
| -rw-r--r-- | source/blender/draw/engines/eevee/shaders/volumetric_lib.glsl | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee/shaders/volumetric_lib.glsl b/source/blender/draw/engines/eevee/shaders/volumetric_lib.glsl index 5b747d66e4d..8c2d1f8a5cb 100644 --- a/source/blender/draw/engines/eevee/shaders/volumetric_lib.glsl +++ b/source/blender/draw/engines/eevee/shaders/volumetric_lib.glsl @@ -113,6 +113,19 @@ vec3 light_volume_shadow(LightData ld, vec3 ray_wpos, vec4 l_vector, sampler3D v /* Heterogeneous volume shadows */ float dd = l_vector.w / volShadowSteps; vec3 L = l_vector.xyz / volShadowSteps; + + if (ld.l_type == SUN) { + /* For sun light we scan the whole frustum. So we need to get the correct endpoints. */ + vec3 ndcP = project_point(ViewProjectionMatrix, ray_wpos); + vec3 ndcL = project_point(ViewProjectionMatrix, ray_wpos + l_vector.xyz) - ndcP; + + vec3 frustum_isect = ndcP + ndcL * line_unit_box_intersect_dist_safe(ndcP, ndcL); + + L = project_point(ViewProjectionMatrixInverse, frustum_isect) - ray_wpos; + L /= volShadowSteps; + dd = length(L); + } + vec3 shadow = vec3(1.0); for (float s = 1.0; s < VOLUMETRIC_SHADOW_MAX_STEP && s <= volShadowSteps; s += 1.0) { vec3 pos = ray_wpos + L * s; |