GLSL to C++ help

Development Programming & Scripting C++
2

In the original code it samples a texture to generate the noise so I guess the question is what is the GetNoise2D function in your code? :stuck_out_tongue:

I’m going to assume that it accesses an array with noise, inputs being the x row and y column in the array (integers).

In that case change your code like so:


	float a = GetNoise2D( ((int)p.X+0)&255, ((int)p.Y+0)&255 );
	float b = GetNoise2D( ((int)p.X+1)&255, ((int)p.Y+0)&255 );
	float c = GetNoise2D( ((int)p.X+0)&255, ((int)p.Y+1)&255 );
	float d = GetNoise2D( ((int)p.X+1)&255, ((int)p.Y+1)&255 );

The &255 part insures that the value will be wrapped from 0 to 255 (assuming the noise array is 256x256).