Incorporate the logistic function (from Program 14.7) into the marble dragon from Program 14.5, and experiment with the settings to create more distinct veins.

Program 14.5

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Java/JOGL application: public void init(GLAutoDrawable drawable) { ... generate Noise(); noise Texture = load3D Texture(); // same as in Prog 14.4, and which in turn calls fillDataArray() } private double logistic(double x) { double k = 3.0; return (1.0/ (1.0+ pow(2.718, -k*x))); } private void fillDataArray(byte data[]) {double veinFrequency = 2.0; double turbPower = 3.0; double maxZoom = 32.0; for (int i = 0; i