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/**
* Make a donation http://sourceforge.net/donate/index.php?group_id=98797
* Microcrowd.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact Josh DeFord jdeford@microcrowd.com
*/
package com.microcrowd.loader.java3d.max3ds.chunks;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3d;
import com.microcrowd.loader.java3d.max3ds.ChunkChopper;
/**
* Loads percentage values from binary data representing them.
*/
public class CameraChunk extends Chunk
{
/**
* Reads the position and target vectors and subtracts them to get
* an axis of rotation. Translate a transform to position and rotate
* on the axis of rotation to point at the target. The angle
* between the z axis and the axis of rotation is the angle used to
* rotate. The translated and rotated vector is stored it the
* chopper as a named object since camera chunks are named.
*/
public void loadData(ChunkChopper chopper)
{
Vector3d yVector = new Vector3d(0,1,0);
Point3d position = new Point3d(chopper.getPoint());
Point3d target = new Point3d(chopper.getPoint());
float bank = chopper.getFloat();
float lens = chopper.getFloat();
//This is the vector for the direction
//of the camera. Represented as a line
//from target to position. We'll use it
//as an axis when we bank.
//Vector3d cameraDirection = new Vector3d();
//cameraDirection.sub(target,position);
//AxisAngle4f bankAxisAngle = new AxisAngle4f(cameraDirection, bankAngle);
Transform3D transform = new Transform3D();
transform.lookAt(position, target, yVector);
transform.invert();
((TransformGroup)chopper.getGroup()).setTransform(transform);
chopper.addViewGroup(chopper.getGroup());
}
}
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