Murat,
Try this code (which I adapted from J3DFly):
/**
* Set the transform so that everything inside the BoundingSphere is
* visible within the view frustum
*/
private void setViewpoint( TransformGroup tg, BoundingSphere
sceneBounds, View view ) {
Transform3D viewTrans = new Transform3D();
// point the view at the center of the object
Point3d center = new Point3d();
sceneBounds.getCenter(center);
double radius = sceneBounds.getRadius();
Point3d eyePos = new Point3d(center);
Vector3d up = new Vector3d();
// pull the eye back far enough to see the whole object
double eyeDist = radius / Math.tan(view.getFieldOfView() / 2.0);
int showAllAxis = 2; // fudge to look down Z axis
switch( showAllAxis ) {
case 0 :
eyePos.x += eyeDist;
up.y = 1;
break;
case 1 :
eyePos.y += eyeDist;
up.z = -1;
break;
case 2 :
eyePos.z += eyeDist;
up.y = 1;
break;
case 3 :
eyePos.x -= eyeDist;
up.y = 1;
break;
case 4 :
eyePos.y -= eyeDist;
up.z = -1;
break;
case 5 :
eyePos.z -= eyeDist;
up.y = 1;
break;
}
viewTrans.setIdentity();
viewTrans.lookAt( eyePos, center, up );
viewTrans.invert();
// If we have moved the model behind the back clip distance then
change
// the back clip distance
if (view.getBackClipDistance()<eyeDist) {
view.setBackClipDistance( eyeDist );
view.setFrontClipDistance(eyeDist/3000);
System.out.println("Back Clip reset to "+eyeDist);
}
tg.setTransform(viewTrans); // set the view transform
} // end setViewpoint()
Good Luck.
- John Wright
Starfire Research
"A. Murat Tanyer" wrote:
>
> Hi all,
>
> I'm looking for some help or some code examples.
>
> The problem is this: I loaded an object from VRML to my Java3d scene.
> How can I find a good point for the 'viewer' to capture all of the image
> in the scene.
>
> The bounding sphere of the scene has a radius 'r' and a center point
> (x,y,z).
>
> I really got stuck with this for several days. I think I need your help.
>
> Thanking you in advance for your help.
>
> Murat
>
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