/**
* Multiply this Matrix for a General Rotation: alpha is the rotation angle in radians and (x,y,z)
* is the direction of the rotation ax
*/
public void rotateGeneral(float alpha, float x, float y, float z) {
// Direction3f dir=new Direction3f(x,y,z);
Vertex3f dir = new Vertex3f(x, y, z);
dir.normalize();
// Direction3f A=dir.getNormalCandidate();
Vertex3f A = dir.getNormalCandidate();
A.normalize();
Vertex3f B = dir.getVectorProduct(A);
// Direction3f B=dir.getVectorProduct(A);
// Construct a Third Vector B normal to Both V and A
Transform3f t = new Transform3f();
float cos = (float) (Math.cos(alpha));
float sin = (float) (Math.sin(alpha));
t.mM.A = dir.getX();
t.mM.B = A.getX();
t.mM.C = B.getX();
t.mM.E = dir.getY();
t.mM.F = A.getY();
t.mM.G = B.getY();
t.mM.I = dir.getZ();
t.mM.L = A.getZ();
t.mM.M = B.getZ();
mult(t);
t.mM.A = dir.getX();
t.mM.B = dir.getY();
t.mM.C = dir.getZ();
t.mM.E = A.getX() * cos - B.getX() * sin;
t.mM.F = A.getY() * cos - B.getY() * sin;
t.mM.G = A.getZ() * cos - B.getZ() * sin;
t.mM.I = A.getX() * sin + B.getX() * cos;
t.mM.L = A.getY() * sin + B.getY() * cos;
t.mM.M = A.getZ() * sin + B.getZ() * cos;
mult(t);
}
