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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
70 lines
1.8 KiB
GLSL
70 lines
1.8 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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#include "lib/core/vertex.h.glsl"
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varying vec2 uv;
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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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#include "vertexcolors.glsl"
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#include "shadows_vertex.glsl"
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#include "compatibility/normals.glsl"
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#include "lib/light/lighting.glsl"
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#include "lib/view/depth.glsl"
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void main(void)
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{
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gl_Position = modelToClip(gl_Vertex);
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vec4 viewPos = modelToView(gl_Vertex);
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gl_ClipVertex = viewPos;
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euclideanDepth = length(viewPos.xyz);
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linearDepth = getLinearDepth(gl_Position.z, viewPos.z);
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passColor = gl_Color;
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passNormal = gl_Normal.xyz;
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passViewPos = viewPos.xyz;
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normalToViewMatrix = gl_NormalMatrix;
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#if @normalMap
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mat3 tbnMatrix = generateTangentSpace(vec4(1.0, 0.0, 0.0, 1.0), passNormal);
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tbnMatrix[0] = normalize(cross(tbnMatrix[2], tbnMatrix[1])); // note, now we need to re-cross to derive tangent again because it wasn't orthonormal
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normalToViewMatrix *= tbnMatrix;
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#endif
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#if !PER_PIXEL_LIGHTING || @shadows_enabled
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vec3 viewNormal = normalToView(passNormal);
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#endif
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#if !PER_PIXEL_LIGHTING
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vec3 diffuseLight, ambientLight;
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doLighting(viewPos.xyz, viewNormal, diffuseLight, ambientLight, shadowDiffuseLighting);
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passLighting = getDiffuseColor().xyz * diffuseLight + getAmbientColor().xyz * ambientLight + getEmissionColor().xyz;
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clampLightingResult(passLighting);
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shadowDiffuseLighting *= getDiffuseColor().xyz;
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#endif
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uv = gl_MultiTexCoord0.xy;
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#if (@shadows_enabled)
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setupShadowCoords(viewPos, viewNormal);
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#endif
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}
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