|
|
- /*******************************************************************************************
- *
- * rPBR [shader] - Equirectangular to cubemap fragment shader
- *
- * Copyright (c) 2017 Victor Fisac
- *
- **********************************************************************************************/
-
- #version 330
-
- // Input vertex attributes (from vertex shader)
- in vec3 fragPos;
-
- // Input uniform values
- uniform sampler2D equirectangularMap;
-
- // Output fragment color
- out vec4 finalColor;
-
- vec2 SampleSphericalMap(vec3 v)
- {
- vec2 uv = vec2(atan(v.z, v.x), asin(v.y));
- uv *= vec2(0.1591, 0.3183);
- uv += 0.5;
- return uv;
- }
-
- void main()
- {
- // Normalize local position
- vec2 uv = SampleSphericalMap(normalize(fragPos));
-
- // Fetch color from texture map
- vec3 color = texture(equirectangularMap, uv).rgb;
-
- // Calculate final fragment color
- finalColor = vec4(color, 1.0);
- }
|
