40 lines
888 B
GLSL
40 lines
888 B
GLSL
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#version 130
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in vec4 normalViewSpace;
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in vec4 posViewSpace;
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in vec4 vertexColor;
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in vec2 vertexTexCoords;
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out vec4 outColor;
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uniform vec4 color;
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uniform bool flatShading;
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uniform bool perVertexColor;
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uniform bool visualizeTexCoords;
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void main()
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{
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vec3 normal = normalize(normalViewSpace.xyz);
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if(flatShading)
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normal = normalize(cross(dFdx(posViewSpace.xyz), dFdy(posViewSpace.xyz)));
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vec3 toLight = normalize(-posViewSpace.xyz);
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float diffuse = abs(dot(normal, toLight));
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float specular = pow(diffuse, 20);
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if(!gl_FrontFacing)
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diffuse *= 0.5;
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vec4 materialColor = perVertexColor ? vertexColor : color;
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if(visualizeTexCoords)
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{
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int cellId = (int(20 * vertexTexCoords.x) + int(20 * vertexTexCoords.y));
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if(cellId % 2 != 0)
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materialColor.xyz *= 0.3;
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}
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outColor = diffuse * materialColor + specular * vec4(0.5, 0.5, 0.5, 0);
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outColor.a = 1;
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}
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