49 lines
1.4 KiB
GLSL
49 lines
1.4 KiB
GLSL
#version 330 core
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uniform sampler2D PositionSampler;
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uniform sampler2D NormalSampler;
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uniform sampler2D ColorSampler;
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uniform float Linear;
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uniform float Quadratic;
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uniform vec3 Eye;
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uniform int LightCount;
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layout (location = 0) out vec4 Color;
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in vec4 PixelTexture;
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layout (std140) uniform Lights
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{
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vec4 light[256];
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};
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void main()
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{
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vec4 position = texture(PositionSampler, PixelTexture.xy);
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vec4 normal = texture(NormalSampler, PixelTexture.xy);
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vec4 color = texture(ColorSampler, PixelTexture.xy);
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vec3 out_color = color.xyz * 0.1;
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for (int i = 0; i < LightCount; i++) {
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vec3 light_position = light[i].xzy + vec3(0, 0, 0.5);
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float light_distance = length(light_position - position.xyz);
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vec3 light_direction = normalize(light_position - position.xyz);
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float diffuse = max(dot(normal.xyz, light_direction), 0.0);
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if (normal.w == 1.0) // two-sided
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diffuse = 1.0;
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//float attenuation = 1.0 / (1.0 + Linear * light_distance + Quadratic * light_distance * light_distance);
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float attenuation = 1.0 / (1.0 + Quadratic * light_distance * light_distance);
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out_color += color.xyz * attenuation * diffuse;
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}
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//vec3 light_direction = normalize(Eye.xyz - position.xyz);
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//float diffuse = max(dot(normal.xyz, light_direction), 0.0);
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if (normal == vec4(0, 0, 0, 0))
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out_color = color.xyz;
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Color = vec4(out_color, 1.0);
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}
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