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https://github.com/OpenMW/openmw.git
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87 lines
No EOL
3.5 KiB
GLSL
87 lines
No EOL
3.5 KiB
GLSL
#define SHADOWS @shadows_enabled
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#if SHADOWS
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uniform float maximumShadowMapDistance;
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uniform float shadowFadeStart;
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@foreach shadow_texture_unit_index @shadow_texture_unit_list
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uniform sampler2DShadow shadowTexture@shadow_texture_unit_index;
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varying vec4 shadowSpaceCoords@shadow_texture_unit_index;
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#if @perspectiveShadowMaps
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varying vec4 shadowRegionCoords@shadow_texture_unit_index;
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#endif
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@endforeach
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#endif // SHADOWS
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float unshadowedLightRatio(float distance)
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{
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float shadowing = 1.0;
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#if SHADOWS
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#if @limitShadowMapDistance
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float fade = clamp((distance - shadowFadeStart) / (maximumShadowMapDistance - shadowFadeStart), 0.0, 1.0);
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if (fade == 1.0)
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return shadowing;
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#endif
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#if @shadowMapsOverlap
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bool doneShadows = false;
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@foreach shadow_texture_unit_index @shadow_texture_unit_list
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if (!doneShadows)
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{
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vec3 shadowXYZ = shadowSpaceCoords@shadow_texture_unit_index.xyz / shadowSpaceCoords@shadow_texture_unit_index.w;
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#if @perspectiveShadowMaps
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vec3 shadowRegionXYZ = shadowRegionCoords@shadow_texture_unit_index.xyz / shadowRegionCoords@shadow_texture_unit_index.w;
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#endif
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if (all(lessThan(shadowXYZ.xy, vec2(1.0, 1.0))) && all(greaterThan(shadowXYZ.xy, vec2(0.0, 0.0))))
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{
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shadowing = min(shadow2DProj(shadowTexture@shadow_texture_unit_index, shadowSpaceCoords@shadow_texture_unit_index).r, shadowing);
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doneShadows = all(lessThan(shadowXYZ, vec3(0.95, 0.95, 1.0))) && all(greaterThan(shadowXYZ, vec3(0.05, 0.05, 0.0)));
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#if @perspectiveShadowMaps
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doneShadows = doneShadows && all(lessThan(shadowRegionXYZ, vec3(1.0, 1.0, 1.0))) && all(greaterThan(shadowRegionXYZ.xy, vec2(-1.0, -1.0)));
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#endif
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}
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}
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@endforeach
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#else
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@foreach shadow_texture_unit_index @shadow_texture_unit_list
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shadowing = min(shadow2DProj(shadowTexture@shadow_texture_unit_index, shadowSpaceCoords@shadow_texture_unit_index).r, shadowing);
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@endforeach
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#endif
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#if @limitShadowMapDistance
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shadowing = mix(shadowing, 1.0, fade);
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#endif
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#endif // SHADOWS
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return shadowing;
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}
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void applyShadowDebugOverlay()
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{
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#if SHADOWS && @useShadowDebugOverlay
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bool doneOverlay = false;
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float colourIndex = 0.0;
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@foreach shadow_texture_unit_index @shadow_texture_unit_list
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if (!doneOverlay)
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{
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vec3 shadowXYZ = shadowSpaceCoords@shadow_texture_unit_index.xyz / shadowSpaceCoords@shadow_texture_unit_index.w;
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#if @perspectiveShadowMaps
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vec3 shadowRegionXYZ = shadowRegionCoords@shadow_texture_unit_index.xyz / shadowRegionCoords@shadow_texture_unit_index.w;
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#endif
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if (all(lessThan(shadowXYZ.xy, vec2(1.0, 1.0))) && all(greaterThan(shadowXYZ.xy, vec2(0.0, 0.0))))
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{
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colourIndex = mod(@shadow_texture_unit_index.0, 3.0);
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if (colourIndex < 1.0)
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gl_FragData[0].x += 0.1;
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else if (colourIndex < 2.0)
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gl_FragData[0].y += 0.1;
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else
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gl_FragData[0].z += 0.1;
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doneOverlay = all(lessThan(shadowXYZ, vec3(0.95, 0.95, 1.0))) && all(greaterThan(shadowXYZ, vec3(0.05, 0.05, 0.0)));
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#if @perspectiveShadowMaps
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doneOverlay = doneOverlay && all(lessThan(shadowRegionXYZ.xyz, vec3(1.0, 1.0, 1.0))) && all(greaterThan(shadowRegionXYZ.xy, vec2(-1.0, -1.0)));
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#endif
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}
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}
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@endforeach
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#endif // SHADOWS
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} |