mirror of https://github.com/OpenMW/openmw.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
87 lines
3.5 KiB
GLSL
87 lines
3.5 KiB
GLSL
#define SHADOWS @shadows_enabled
|
|
|
|
#if SHADOWS
|
|
uniform float maximumShadowMapDistance;
|
|
uniform float shadowFadeStart;
|
|
@foreach shadow_texture_unit_index @shadow_texture_unit_list
|
|
uniform sampler2DShadow shadowTexture@shadow_texture_unit_index;
|
|
varying vec4 shadowSpaceCoords@shadow_texture_unit_index;
|
|
|
|
#if @perspectiveShadowMaps
|
|
varying vec4 shadowRegionCoords@shadow_texture_unit_index;
|
|
#endif
|
|
@endforeach
|
|
#endif // SHADOWS
|
|
|
|
float unshadowedLightRatio(float distance)
|
|
{
|
|
float shadowing = 1.0;
|
|
#if SHADOWS
|
|
#if @limitShadowMapDistance
|
|
float fade = clamp((distance - shadowFadeStart) / (maximumShadowMapDistance - shadowFadeStart), 0.0, 1.0);
|
|
if (fade == 1.0)
|
|
return shadowing;
|
|
#endif
|
|
#if @shadowMapsOverlap
|
|
bool doneShadows = false;
|
|
@foreach shadow_texture_unit_index @shadow_texture_unit_list
|
|
if (!doneShadows)
|
|
{
|
|
vec3 shadowXYZ = shadowSpaceCoords@shadow_texture_unit_index.xyz / shadowSpaceCoords@shadow_texture_unit_index.w;
|
|
#if @perspectiveShadowMaps
|
|
vec3 shadowRegionXYZ = shadowRegionCoords@shadow_texture_unit_index.xyz / shadowRegionCoords@shadow_texture_unit_index.w;
|
|
#endif
|
|
if (all(lessThan(shadowXYZ.xy, vec2(1.0, 1.0))) && all(greaterThan(shadowXYZ.xy, vec2(0.0, 0.0))))
|
|
{
|
|
shadowing = min(shadow2DProj(shadowTexture@shadow_texture_unit_index, shadowSpaceCoords@shadow_texture_unit_index).r, shadowing);
|
|
|
|
doneShadows = all(lessThan(shadowXYZ, vec3(0.95, 0.95, 1.0))) && all(greaterThan(shadowXYZ, vec3(0.05, 0.05, 0.0)));
|
|
#if @perspectiveShadowMaps
|
|
doneShadows = doneShadows && all(lessThan(shadowRegionXYZ, vec3(1.0, 1.0, 1.0))) && all(greaterThan(shadowRegionXYZ.xy, vec2(-1.0, -1.0)));
|
|
#endif
|
|
}
|
|
}
|
|
@endforeach
|
|
#else
|
|
@foreach shadow_texture_unit_index @shadow_texture_unit_list
|
|
shadowing = min(shadow2DProj(shadowTexture@shadow_texture_unit_index, shadowSpaceCoords@shadow_texture_unit_index).r, shadowing);
|
|
@endforeach
|
|
#endif
|
|
#if @limitShadowMapDistance
|
|
shadowing = mix(shadowing, 1.0, fade);
|
|
#endif
|
|
#endif // SHADOWS
|
|
return shadowing;
|
|
}
|
|
|
|
void applyShadowDebugOverlay()
|
|
{
|
|
#if SHADOWS && @useShadowDebugOverlay
|
|
bool doneOverlay = false;
|
|
float colourIndex = 0.0;
|
|
@foreach shadow_texture_unit_index @shadow_texture_unit_list
|
|
if (!doneOverlay)
|
|
{
|
|
vec3 shadowXYZ = shadowSpaceCoords@shadow_texture_unit_index.xyz / shadowSpaceCoords@shadow_texture_unit_index.w;
|
|
#if @perspectiveShadowMaps
|
|
vec3 shadowRegionXYZ = shadowRegionCoords@shadow_texture_unit_index.xyz / shadowRegionCoords@shadow_texture_unit_index.w;
|
|
#endif
|
|
if (all(lessThan(shadowXYZ.xy, vec2(1.0, 1.0))) && all(greaterThan(shadowXYZ.xy, vec2(0.0, 0.0))))
|
|
{
|
|
colourIndex = mod(@shadow_texture_unit_index.0, 3.0);
|
|
if (colourIndex < 1.0)
|
|
gl_FragData[0].x += 0.1;
|
|
else if (colourIndex < 2.0)
|
|
gl_FragData[0].y += 0.1;
|
|
else
|
|
gl_FragData[0].z += 0.1;
|
|
|
|
doneOverlay = all(lessThan(shadowXYZ, vec3(0.95, 0.95, 1.0))) && all(greaterThan(shadowXYZ, vec3(0.05, 0.05, 0.0)));
|
|
#if @perspectiveShadowMaps
|
|
doneOverlay = doneOverlay && all(lessThan(shadowRegionXYZ.xyz, vec3(1.0, 1.0, 1.0))) && all(greaterThan(shadowRegionXYZ.xy, vec2(-1.0, -1.0)));
|
|
#endif
|
|
}
|
|
}
|
|
@endforeach
|
|
#endif // SHADOWS
|
|
} |