/*******************************************************************************************
*
*   rPBR [shader] - Background skybox fragment shader
*
*   Copyright (c) 2017 Victor Fisac
*
**********************************************************************************************/

#version 330

# Input vertex attributes (from vertex shader)
in vec3 fragPos

# Input uniform values
uniform samplerCube environmentMap

# Output fragment color
out vec4 finalColor

void main()
[
    # Fetch color from texture map
    vec3 color = texture(environmentMap, fragPos).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)
]