41 lines
1.3 KiB
GLSL
41 lines
1.3 KiB
GLSL
#version 330 core
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in VertexData {
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vec3 normal;
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vec4 fragColor;
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vec2 texCoord;
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vec3 lightPosition;
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vec3 fragPosition;
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vec4 lightBrightness;
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vec3 lightColor;
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} vertexData;
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out vec4 outColor;
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uniform sampler2D modelTexture;
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void main() {
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vec3 ambientLightColor = vec3(1.0, 1.0, 1.0);
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// Ambient lighting
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vec3 ambient = vertexData.lightBrightness.x * ambientLightColor;
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// Diffuse lighting
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vec3 normalVector = normalize(vertexData.normal);
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vec3 lightDirection = normalize(vertexData.lightPosition - vertexData.fragPosition);
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float diffuse = vertexData.lightBrightness.y * max(dot(normalVector, lightDirection), 0.0);
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// Specular lighting
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vec3 viewDirection = normalize(-vertexData.fragPosition);
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vec3 reflectDirection = normalize(-reflect(lightDirection, normalVector));
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float reflectionIntensity = pow(max(dot(viewDirection, reflectDirection), 0.0), vertexData.lightBrightness.w);
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float specular = vertexData.lightBrightness.z * reflectionIntensity;
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float dst = distance(vertexData.lightPosition, vertexData.fragPosition);
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float attn = 1./(1.0F + 0.1F*dst + 0.01f*dst*dst) ;
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vec3 color = ((diffuse + specular)*attn + ambient) * vertexData.lightColor;
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outColor = (texture(modelTexture, vertexData.texCoord) + vertexData.fragColor) * vec4(color, 1.0);
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}
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