60 lines
1.7 KiB
GLSL
60 lines
1.7 KiB
GLSL
#version 400 core
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#ifdef GL_ES
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precision mediump float;
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precision mediump int;
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#endif
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struct Light {
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vec3 color;
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vec3 position;
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vec3 attenuation;
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};
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const int MAX_LIGHT_NUMBER = 8;
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// Input:
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layout (location = 0) in vec3 in_position;
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layout (location = 1) in vec2 in_textureCoords;
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layout (location = 2) in vec3 in_normal;
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// 2 light for suns and other for locals ...
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uniform Light in_lights[MAX_LIGHT_NUMBER];
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uniform mat4 in_matrixTransformation;
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uniform mat4 in_matrixProjection;
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uniform mat4 in_matrixView;
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//uniform float in_numberOfRows;
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//uniform vec2 in_offset;
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const float in_numberOfRows = 1;
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const vec2 in_offset = vec2(0.0,0.0);
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// Configuration of the FOV ==> TODO: Set it in parameter uniform ...
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const float c_density = 0.007;
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const float c_gradient = 1.5;
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// output:
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out vec2 io_textureCoords;
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out vec3 io_surfaceNormal;
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out vec3 io_toCameraVector;
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out vec3 io_toLightVector[MAX_LIGHT_NUMBER];
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// FOW: Fog Of War result calculation
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out float io_fowVisibility;
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void main(void) {
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vec4 worldPosition = in_matrixTransformation * vec4(in_position, 1.0);
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vec4 positionRelativeToCam = in_matrixView * worldPosition;
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gl_Position = in_matrixProjection * positionRelativeToCam;
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io_textureCoords = (in_textureCoords/in_numberOfRows) + in_offset;
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io_surfaceNormal = (in_matrixTransformation * vec4(in_normal, 0.0)).xyz;
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for(int iii=0;iii<MAX_LIGHT_NUMBER;iii++) {
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io_toLightVector[iii] = in_lights[iii].position - worldPosition.xyz;
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}
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io_toCameraVector = (inverse(in_matrixView) * vec4(0.0,0.0,0.0,1.0)).xyz - worldPosition.xyz;
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float distance = length(positionRelativeToCam.xyz);
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io_fowVisibility = exp(-pow((distance*c_density),c_gradient));
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io_fowVisibility = clamp(io_fowVisibility, 0.0, 1.0);
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}
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