sevelee

'''
Ryan Roberts - Wrap Deformer
rr_wrap.py

Description:
    Ryan Robers created a simple function to create a wrap deformer.  
    The wrap deformer needs a little more than the deform command to get working.
    Michael Clavan
    I wanted to have the function also return the deformer to the user.  So, my contributions are pretty minor.
    I converted the wrap deformer into a pynode object type pm.nt.Wrap.

sevelee

// Taken from GradientNoiseNode.cs from the Shader Graph package.
float2 GradientNoise_Dir_float(float2 p) {
    // Permutation and hashing used in webgl-nosie goo.gl/pX7HtC
    p = p % 289;
    // need full precision, otherwise half overflows when p > 1
    float x = float(34 * p.x + 1) * p.x % 289 + p.y;
    x = (34 * x + 1) * x % 289;
    x = frac(x / 41) * 2 - 1;
    return normalize(float2(x - floor(x + 0.5), abs(x) - 0.5));
}