mirror of
https://github.com/OpenMW/openmw.git
synced 2025-10-31 01:26:38 +00:00
47 lines
1.6 KiB
GLSL
47 lines
1.6 KiB
GLSL
#define SHADOWS @shadows_enabled
|
|
|
|
#if SHADOWS
|
|
@foreach shadow_texture_unit_index @shadow_texture_unit_list
|
|
uniform mat4 shadowSpaceMatrix@shadow_texture_unit_index;
|
|
varying vec4 shadowSpaceCoords@shadow_texture_unit_index;
|
|
|
|
#if @perspectiveShadowMaps
|
|
uniform mat4 validRegionMatrix@shadow_texture_unit_index;
|
|
varying vec4 shadowRegionCoords@shadow_texture_unit_index;
|
|
#endif
|
|
@endforeach
|
|
|
|
// Enabling this may reduce peter panning. Probably unnecessary.
|
|
const bool onlyNormalOffsetUV = false;
|
|
#endif // SHADOWS
|
|
|
|
void setupShadowCoords(vec4 viewPos, vec3 viewNormal)
|
|
{
|
|
#if SHADOWS
|
|
vec4 shadowOffset;
|
|
@foreach shadow_texture_unit_index @shadow_texture_unit_list
|
|
#if @perspectiveShadowMaps
|
|
shadowRegionCoords@shadow_texture_unit_index = validRegionMatrix@shadow_texture_unit_index * viewPos;
|
|
#endif
|
|
|
|
#if @disableNormalOffsetShadows
|
|
shadowSpaceCoords@shadow_texture_unit_index = shadowSpaceMatrix@shadow_texture_unit_index * viewPos;
|
|
#else
|
|
shadowOffset = vec4(viewNormal * @shadowNormalOffset, 0.0);
|
|
|
|
if (onlyNormalOffsetUV)
|
|
{
|
|
vec4 lightSpaceXY = viewPos + shadowOffset;
|
|
lightSpaceXY = shadowSpaceMatrix@shadow_texture_unit_index * lightSpaceXY;
|
|
|
|
shadowSpaceCoords@shadow_texture_unit_index.xy = lightSpaceXY.xy;
|
|
}
|
|
else
|
|
{
|
|
vec4 offsetViewPosition = viewPos + shadowOffset;
|
|
shadowSpaceCoords@shadow_texture_unit_index = shadowSpaceMatrix@shadow_texture_unit_index * offsetViewPosition;
|
|
}
|
|
#endif
|
|
@endforeach
|
|
#endif // SHADOWS
|
|
}
|