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Eevee: Contact Shadows: Add slope based bias & fix brightening.

This commit is contained in:
Clément Foucault 2018-05-01 17:31:35 +02:00
parent 8c92a02720
commit 1bef7f9318
1 changed files with 16 additions and 4 deletions
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20
source/blender/draw/engines/eevee/shaders/lamps_lib.glsl
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@ -211,15 +211,27 @@ float light_visibility(LightData ld, vec3 W,
vec3 ray_dir = L.xyz + T * rand.z + B * rand.w;
ray_dir = transform_direction(ViewMatrix, ray_dir);
ray_dir = normalize(ray_dir);
vec3 ray_origin = viewPosition + viewNormal * (gl_FrontFacing ? data.sh_contact_offset : -data.sh_contact_offset);
vec3 hit_pos = raycast(-1, ray_origin, ray_dir * trace_distance, data.sh_contact_thickness, rand.x,
0.75, 0.01, false);
vec3 ray_ori = viewPosition;
float bias = 0.5; /* Constant Bias */
bias += 1.0 - abs(dot(viewNormal, ray_dir)); /* Angle dependant bias */
bias *= gl_FrontFacing ? data.sh_contact_offset : -data.sh_contact_offset;
vec3 nor_bias = viewNormal * bias;
ray_ori += nor_bias;
ray_dir *= trace_distance;
ray_dir -= nor_bias;
vec3 hit_pos = raycast(-1, ray_ori, ray_dir, data.sh_contact_thickness, rand.x,
0.1, 0.001, false);
if (hit_pos.z > 0.0) {
hit_pos = get_view_space_from_depth(hit_pos.xy, hit_pos.z);
float hit_dist = distance(viewPosition, hit_pos);
float dist_ratio = hit_dist / trace_distance;
return mix(0.0, vis, dist_ratio * dist_ratio * dist_ratio);
return vis * saturate(dist_ratio * dist_ratio * dist_ratio);
}
}
#endif