/**
* Copyright (c) 2003-2009, Xith3D Project Group all rights reserved.
*
* Portions based on the Java3D interface, Copyright by Sun Microsystems.
* Many thanks to the developers of Java3D and Sun Microsystems for their
* innovation and design.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the 'Xith3D Project Group' nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) A
* RISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE
*/
package org.xith3d.selection;
import org.openmali.spatial.bodies.Frustum;
import org.openmali.spatial.bodies.Plane;
import org.openmali.vecmath2.Point3f;
import org.xith3d.picking.PickPool;
import org.xith3d.picking.PickRay;
import org.xith3d.render.Canvas3D;
import org.xith3d.render.RenderPassConfig;
import org.xith3d.scenegraph._SG_PrivilegedAccess;
/**
* @author Mathias Henze (aka cylab)
*/
public class ViewConstraints implements MovementConstraints
{
public void computeNewPosition( RenderPassConfig rpc, Canvas3D canvas, int x, int y, Point3f p0, Point3f newPosition )
{
Plane movementPlane = Plane.fromPool();
PickRay pickRay = PickPool.allocatePickRay();
try
{
if ( rpc != null )
{
_SG_PrivilegedAccess.set( canvas.getView(), true, rpc );
}
Frustum frustum;
if ( ( rpc != null ) && ( rpc.getViewport() != null ) )
frustum = canvas.getView().getFrustum( rpc.getViewport() );
else
frustum = canvas.getView().getFrustum( canvas );
frustum.getPlaneNear( movementPlane );
float d = -( movementPlane.getNX() * p0.getX() + movementPlane.getNY() * p0.getY() + movementPlane.getNZ() * p0.getZ() );
movementPlane.setD( d );
pickRay.recalculate( rpc, canvas, x, y );
movementPlane.intersects( pickRay, newPosition );
}
finally
{
if ( rpc != null )
{
_SG_PrivilegedAccess.set( canvas.getView(), false, rpc );
}
PickPool.deallocatePickRay( pickRay );
Plane.toPool( movementPlane );
}
}
public ViewConstraints()
{
}
}