src/shaders/textureData.comp

Go to the documentation of this file.

#version 430

layout(local_size_x = 16, local_size_y = 16) in; 

layout (std430, binding = 0) readonly buffer inHeight 
{
    float terrHeight[];
};

layout (std430, binding = 1) readonly buffer inNormals 
{
    float normals[];
};

layout (rgba32f, binding = 0) writeonly uniform image2D textureOut; 
uniform ivec2 size; 
uniform float maxHeight; 

void main () {
    ivec2 storePos = ivec2(gl_GlobalInvocationID.xy);

    int x = clamp(storePos.x, 0, size.x-1); 
    int y = clamp(storePos.y, 0, size.y-1); 
    int offset = x + size.x * y;

    vec3 normal = vec3(normals[offset*3], normals[offset*3 + 1], normals[offset*3 + 2]);
    float height = terrHeight[offset] / maxHeight; // divide by max height since textures work with normalized (0-1) values

    imageStore(textureOut, storePos, vec4(normal, height));

}