ciao all,
just need some help with a simple problem.. i want to set the
direction (or orientation i guess) of an object (box, camera, whatever)
from a direction vector.. i thought i could get it done but i havent
been able to... i can do it if i know the angles already, but figuring
the angles im messing up somewhere.. ive attached the code im trying..
i know its not efficient but i just want to get it working.. thanks in
advance, wayne
/**
* Updates the Tranform3D in the TransformGroup according to the
* position, direction, normal. The transform is updated in place.
* !NOT IMPLEMENTED!
*
* @param t the Transform3D to update.
* @param p The new position.
* @param d The new direction.
* @param n The new normal.
*/
private void _updateTransform(Transform3D t, Point3d p, Vector3f d,
Vector3f n)
{
// First apply the position changes.
t.setTranslation(new Vector3d((Tuple3d)p));
// Now set the direction which this should be pointing.
// We will do the rotations here.
// Normalize the direction first.
//d.normalize();
Vector3f x = new Vector3f(1.0f, 0.0f, 0.0f);
Vector3f y = new Vector3f(0.0f, 1.0f, 0.0f);
Vector3f z = new Vector3f(0.0f, 0.0f, 1.0f);
System.err.println("dir = " + d);
Matrix3d rot = new Matrix3d();
rot.setIdentity();
Matrix3d x_rot = new Matrix3d();
Vector3f temp = new Vector3f();
x_rot.setIdentity();
temp.set(0.0f, d.y, d.z);
x_rot.rotX(z.angle(temp));
System.err.println("x angle = " + z.angle(temp));
Matrix3d y_rot = new Matrix3d();
y_rot.setIdentity();
temp.set(d.x, 0.0f, d.z);
y_rot.rotZ(x.angle(temp));
System.err.println("y angle = " + x.angle(temp));
Matrix3d z_rot = new Matrix3d();
z_rot.setIdentity();
temp.set(d.x, d.y, 0.0f);
z_rot.rotZ(y.angle(d));
System.err.println("z angle = " + y.angle(temp));
rot.mul(x_rot);
rot.mul(y_rot);
rot.mul(z_rot);
//rot.rotZ(1.57);
// Now set the rotation of this transform.
t.setRotation(rot);
}
begin:vcard
n:deprince jr.;wayne c.
tel;cell:215.630.5146
tel;home:610.997.0147
tel;work:610.758.4785
x-mozilla-html:TRUE
url:http://www.lehigh.edu/~wcd2
org:Lehigh University;Electrical Engineering and Computer Science
adr:;;328 Adams Street Apt. #204;Bethlehem;PA;18015;USA
version:2.1
email;internet:[EMAIL PROTECTED]
title:MS/Phd Student - T.A.
note;quoted-printable:Instant Messenger Name - mrgrimm55=0D=0A
end:vcard
