public static Texture2D GeneratePerlinNoiseGPU(Vector3 position, GraphicsDevice device, SpriteBatch sp)
{
device.SetRenderTarget(cloudsRenderTarget);
device.Clear(ClearOptions.Target | ClearOptions.DepthBuffer, Color.Black, 1.0f, 0);
sp.Begin(SpriteSortMode.Deferred, null, null, null, null, PerlinEffect);
PerlinEffect.Parameters["TextureSampler+permTexture"].SetValue(permTexture);
//PerlinEffect.Parameters["Overcast"].SetValue(1.1f);
PerlinEffect.Parameters["xCoord"].SetValue(new Vector2(position.X, position.Z));
foreach (var pass in PerlinEffect.CurrentTechnique.Passes)
{
pass.Apply();
device.DrawUserIndexedPrimitives(PrimitiveType.TriangleList, fullScreenVertices, 0, 4, IndexData, 0, 2);
}
sp.End();
device.SetRenderTarget(null);
return(cloudsRenderTarget.CloneRenderTarget(device));
}