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