public static void rotate(float angle, Vertex3f axis, Matrix4f src, ref Matrix4f dest)
{
Matrix4f rotationMatrix = new Matrix4f();
rotationMatrix.SetIdentity();
float[] matbuffer = rotationMatrix.Buffer;
if (axis.x != 0)
{
matbuffer[5] = (float)Math.Cos(angle);
matbuffer[6] = (float)-Math.Sin(angle);
matbuffer[9] = (float)Math.Sin(angle);
matbuffer[10] = (float)Math.Cos(angle);
}
else if (axis.y != 0)
{
matbuffer[0] = (float)Math.Cos(angle);
matbuffer[2] = (float)Math.Sin(angle);
matbuffer[8] = (float)-Math.Sin(angle);
matbuffer[10] = (float)Math.Cos(angle);
}
else if (axis.z != 0)
{
matbuffer[0] = (float)Math.Cos(angle);
matbuffer[1] = (float)-Math.Sin(angle);
matbuffer[4] = (float)Math.Sin(angle);
matbuffer[5] = (float)Math.Cos(angle);
}
// apply rotation to src matrix
Matrix tempmat = (Matrix) new Matrix(matbuffer, 4, 4).Multiply(src);
// set dest matrix to the rotated matrix
dest = new Matrix4f(tempmat.Buffer);
}
public static void scale(Vertex3f vector, Matrix4f src, ref Matrix4f dest)
{
Matrix4f scalerMatrix = new Matrix4f();
scalerMatrix.SetIdentity();
float[] matbuffer = scalerMatrix.Buffer;
matbuffer[0] = vector.x;
matbuffer[5] = vector.y;
matbuffer[10] = vector.z;
Matrix tempmat = (Matrix) new Matrix(matbuffer, 4, 4).Multiply(src);
dest = new Matrix4f(tempmat.Buffer);
}
public static void translate(Vertex3f translation, Matrix4f src, out Matrix4f des)
{
Matrix4f translationMatrix = new Matrix4f();
translationMatrix.SetIdentity();
float[] matbuffer = translationMatrix.Buffer;
matbuffer[12] = translation.x;
matbuffer[13] = translation.y;
matbuffer[14] = translation.z;
Matrix tempmat = (Matrix) new Matrix(matbuffer, 4, 4).Multiply(src);
des = new Matrix4f(tempmat.Buffer);
}
