Hi,
I am using using Quats for rotation along X an Y axis. I need to apply
rotations according to the mouse drag amount. I have extended the Behavior
class and wrote MyMouseRotate class to do this.
But it doesnt work. I have read the archives and other material about
Quats for rotation but still I am not able to figure out where I am doing
wrong. Can any of you please look at my code and help me to do in the
right way?
Thanks
Bhargavi
This is the piece of code I am using:
--------------------------------------------------------------
targetTG.getTransform(transform3D);
//Translate to Origin
translate.setTranslation(new Vector3d(3980.47,-320.34,-205.63));
transform3D.mul(translate);
Quat4d qprev = new Quat4d();
Quat4d qu; //= new Quat4d();
//qu.set(new AxisAngle4d(1.0,.0,.0, rotateX*RADIANS));
// I have also used AxisAngle instead of the constructor to create
Quat with no luck//
double ang= rotateX*RADIANS;
qu = new Quat4d(1.0 * Math.sin(ang/2),
0.0 * Math.sin(ang/2),
0.0 * Math.sin(ang/2),
Math.cos(ang/2)); //Quat for Xaxis
transform3D.get(qprev);
qprev.mul(qu);
ang= rotateY*RADIANS;
qu = new Quat4d(0.0 * Math.sin(ang/2),
1.0 * Math.sin(ang/2),
0.0 * Math.sin(ang/2),
Math.cos(ang/2));
//qu.set(new AxisAngle4d(.0,1.0,.0, rotateY*RADIANS));
qprev.mul(qu);
transform3D.set(qprev);
//Translate back from origin//
translate.setTranslation(new Vector3d(-3980.47,320.34,205.63));
transform3D.mul(translate);
targetTG.setTransform(transform3D);
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