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/*******************************************************************************************
*
* rPBR [shader] - Background skybox fragment shader
*
* Copyright (c) 2017 Victor Fisac
*
* 19-Jun-2020 - modified by Giuseppe Mastrangelo (@peppemas) - VFlip Support
*
**********************************************************************************************/
#version 330
// Input vertex attributes (from vertex shader)
in vec3 fragPosition;
// Input uniform values
uniform samplerCube environmentMap;
uniform bool vflipped;
// Output fragment color
out vec4 finalColor;
void main()
{
// Fetch color from texture map
vec3 color = vec3(0.0);
if (vflipped) color = texture(environmentMap, vec3(fragPosition.x, -fragPosition.y, fragPosition.z)).rgb;
else color = texture(environmentMap, fragPosition).rgb;
// Apply gamma correction
color = color/(color + vec3(1.0));
color = pow(color, vec3(1.0/2.2));
// Calculate final fragment color
finalColor = vec4(color, 1.0);
}
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