游戏开发中的数学和物理算法（18）：缩放

2D[b]缩放的数学形式：[/b]

3D缩放

Matrix4X1 scale3DByMultiply(Matrix4X1 start, float dx, float dy, float dz)

{

Matrix4X4 temp;

Matrix4X1 result;

//Zero out the matrix to make sure nothing is left uninitialized.

temp = createFixed4X4Matrix(0);

//setup the 3x3 for multiplication;

temp.index[0][0] = dx;

temp.index[1][1] = dy;

temp.index[2][2] = dz;

temp.index[3][3] = 1;

result = multiplyMatrixNxM(temp,start);

return result;

}