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EEVEE: Change local light ray clipping method

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The previous one was too conservative and didn't
work with area light.
This commit is contained in:
Clément Foucault
2024-07-04 19:47:47 +02:00
parent a023499d28
commit 2149a0b2cc
1 changed files with 4 additions and 3 deletions
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7
source/blender/draw/engines/eevee_next/shaders/eevee_shadow_tracing_lib.glsl
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@@ -265,12 +265,13 @@ ShadowRayPunctual shadow_ray_generate_punctual(LightData light, vec2 random_2d,
direction = point_on_light_shape - lP;
direction = shadow_ray_above_horizon_ensure(direction, lNg, shape_radius);
}
vec3 shadow_position = light_local_data_get(light).shadow_position;
/* Clip the ray to not cross the near plane.
* Avoid traces that starts on tiles that have not been queried, creating noise. */
float clip_distance = clip_near + shape_radius * 0.5;
direction *= saturate(1.0 - clip_distance * inversesqrt(length_squared(direction)));
float clip_distance = length(lP - shadow_position) - clip_near;
/* Still clamp to a minimal size to avoid isssue with zero length vectors. */
direction *= saturate(1e-6 + clip_distance * inversesqrt(length_squared(direction)));
vec3 shadow_position = light_local_data_get(light).shadow_position;
/* Compute the ray again. */
ShadowRayPunctual ray;
/* Transform to shadow local space. */