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https://github.com/OpenMW/openmw.git
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4a96885323
Move tangent space generation to the vertex shaders Support diffuse parallax when no normal map is present Don't use diffuse parallax if there's no diffuse map Generalize normal-to-view conversion Rewrite parallax
103 lines
2.6 KiB
GLSL
103 lines
2.6 KiB
GLSL
#version 120
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#if @useUBO
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#extension GL_ARB_uniform_buffer_object : require
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#endif
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#if @useGPUShader4
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#extension GL_EXT_gpu_shader4: require
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#endif
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varying vec2 uv;
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uniform sampler2D diffuseMap;
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#if @normalMap
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uniform sampler2D normalMap;
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#endif
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#if @blendMap
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uniform sampler2D blendMap;
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#endif
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varying float euclideanDepth;
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varying float linearDepth;
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#define PER_PIXEL_LIGHTING (@normalMap || @forcePPL)
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#if !PER_PIXEL_LIGHTING
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centroid varying vec3 passLighting;
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centroid varying vec3 shadowDiffuseLighting;
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#endif
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varying vec3 passViewPos;
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varying vec3 passNormal;
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uniform vec2 screenRes;
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uniform float far;
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#include "vertexcolors.glsl"
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#include "shadows_fragment.glsl"
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#include "lib/light/lighting.glsl"
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#include "lib/material/parallax.glsl"
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#include "fog.glsl"
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#include "compatibility/normals.glsl"
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void main()
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{
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vec2 adjustedUV = (gl_TextureMatrix[0] * vec4(uv, 0.0, 1.0)).xy;
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#if @parallax
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adjustedUV += getParallaxOffset(transpose(normalToViewMatrix) * normalize(-passViewPos), texture2D(normalMap, adjustedUV).a, 1.f);
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#endif
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vec4 diffuseTex = texture2D(diffuseMap, adjustedUV);
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gl_FragData[0] = vec4(diffuseTex.xyz, 1.0);
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vec4 diffuseColor = getDiffuseColor();
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gl_FragData[0].a *= diffuseColor.a;
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#if @blendMap
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vec2 blendMapUV = (gl_TextureMatrix[1] * vec4(uv, 0.0, 1.0)).xy;
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gl_FragData[0].a *= texture2D(blendMap, blendMapUV).a;
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#endif
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#if @normalMap
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vec3 viewNormal = normalToView(texture2D(normalMap, adjustedUV).xyz * 2.0 - 1.0);
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#else
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vec3 viewNormal = normalToView(normalize(passNormal));
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#endif
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float shadowing = unshadowedLightRatio(linearDepth);
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vec3 lighting;
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#if !PER_PIXEL_LIGHTING
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lighting = passLighting + shadowDiffuseLighting * shadowing;
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#else
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vec3 diffuseLight, ambientLight;
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doLighting(passViewPos, viewNormal, shadowing, diffuseLight, ambientLight);
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lighting = diffuseColor.xyz * diffuseLight + getAmbientColor().xyz * ambientLight + getEmissionColor().xyz;
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#endif
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clampLightingResult(lighting);
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gl_FragData[0].xyz *= lighting;
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#if @specularMap
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float shininess = 128.0; // TODO: make configurable
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vec3 matSpec = vec3(diffuseTex.a);
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#else
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float shininess = gl_FrontMaterial.shininess;
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vec3 matSpec = getSpecularColor().xyz;
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#endif
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if (matSpec != vec3(0.0))
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{
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gl_FragData[0].xyz += matSpec * getSpecular(viewNormal, passViewPos, shininess, shadowing);
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}
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gl_FragData[0] = applyFogAtDist(gl_FragData[0], euclideanDepth, linearDepth, far);
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#if !@disableNormals && @writeNormals
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gl_FragData[1].xyz = viewNormal * 0.5 + 0.5;
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#endif
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applyShadowDebugOverlay();
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}
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