multiply: function()

in seriously.js [136:178]

• 38 lines of code
• 2 McCabe index (conditional complexity)

		multiply: function (dest, mat, mat2) {
			// Cache the matrix values (makes for huge speed increases!)
			var a00 = mat[0], a01 = mat[1], a02 = mat[2], a03 = mat[3],
				a10 = mat[4], a11 = mat[5], a12 = mat[6], a13 = mat[7],
				a20 = mat[8], a21 = mat[9], a22 = mat[10], a23 = mat[11],
				a30 = mat[12], a31 = mat[13], a32 = mat[14], a33 = mat[15],

			// Cache only the current line of the second matrix
			b0 = mat2[0], b1 = mat2[1], b2 = mat2[2], b3 = mat2[3];
			dest[0] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
			dest[1] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
			dest[2] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
			dest[3] = b0*a03 + b1*a13 + b2*a23 + b3*a33;

			b0 = mat2[4];
			b1 = mat2[5];
			b2 = mat2[6];
			b3 = mat2[7];
			dest[4] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
			dest[5] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
			dest[6] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
			dest[7] = b0*a03 + b1*a13 + b2*a23 + b3*a33;

			b0 = mat2[8];
			b1 = mat2[9];
			b2 = mat2[10];
			b3 = mat2[11];
			dest[8] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
			dest[9] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
			dest[10] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
			dest[11] = b0*a03 + b1*a13 + b2*a23 + b3*a33;

			b0 = mat2[12];
			b1 = mat2[13];
			b2 = mat2[14];
			b3 = mat2[15];
			dest[12] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
			dest[13] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
			dest[14] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
			dest[15] = b0*a03 + b1*a13 + b2*a23 + b3*a33;

			return dest;
		},