uniform vec3 u_noiseTextureDimensions; in vec2 position; out vec2 v_position; void main() { gl_Position = vec4(position, 0.1, 1.0); float textureSliceWidth = u_noiseTextureDimensions.x; float noiseTextureRows = u_noiseTextureDimensions.y; float inverseNoiseTextureRows = u_noiseTextureDimensions.z; vec2 transformedPos = (position * 0.5) + vec2(0.5); transformedPos *= textureSliceWidth; transformedPos.x *= textureSliceWidth * inverseNoiseTextureRows; transformedPos.y *= noiseTextureRows; v_position = transformedPos; }