Faster initialize Node_FC

[colinlin1982]

code： //nodeMat[0] = pow(double(x), 4) / pow(scale, 4); // x^4 //nodeMat[1] = 2 * pow(double(x), 3)y / pow(scale, 4); // 2 * x^3 * y = 2xy * x^2 = [5][8] //nodeMat[2] = double(x)xyy / pow(scale, 4); // x^2 * y^2 = [5] * [11] //nodeMat[3] = 2 * pow(double(x), 3) / pow(scale, 3); // 2 * x^3 = [12][5] //nodeMat[4] = 2 * double(x)xy / pow(scale, 3); // 2 * x^2 * y = [13][5] //nodeMat[5] = double(x)x / (scalescale); // x^2 //nodeMat[6] = 2 * double(x)yyy / pow(scale, 4); // 2 * x * y^3 = [10]x //nodeMat[7] = 4 * double(x)yy / pow(scale, 3); // 4 * x * y^2 = 2 * x * y * 2 * y = [13][8] //nodeMat[8] = 2 * double(x)y / (scalescale); // 2 * x * y = [13]x //nodeMat[9] = pow(double(y), 4) / pow(scale, 4); // y^4 = [11][11] //nodeMat[10] = 2 * pow(double(y), 3) / pow(scale, 3); // 2 * y^3 = [13]*[11] //nodeMat[11] = double(y)y / (scalescale); // y^2 //nodeMat[12] = 2 * double(x) / scale; // 2x //nodeMat[13] = 2 * double(y) / scale; // 2y //nodeMat[14] = 1;

	double xs = double(x) / scale;
	double ys = double(y) / scale;
	nodeMat[14] = 1;
	nodeMat[13] = 2 * ys;
	nodeMat[12] = 2 * xs;
	nodeMat[11] = ys * ys;
	nodeMat[10] = nodeMat[13] * nodeMat[11];
	nodeMat[9] = nodeMat[11] * nodeMat[11];
	nodeMat[8] = nodeMat[13] * xs;
	nodeMat[7] = nodeMat[13] * nodeMat[8];
	nodeMat[6] = nodeMat[10] * xs;
	nodeMat[5] = xs * xs;
	nodeMat[4] = nodeMat[5] * nodeMat[13];
	nodeMat[3] = nodeMat[5] * nodeMat[12];
	nodeMat[2] = nodeMat[5] * nodeMat[11];
	nodeMat[1] = nodeMat[5] * nodeMat[8];
	nodeMat[0] = nodeMat[5] * nodeMat[5];

About 4 times faster.