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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* All rights reserved.
*
* 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 'jMonkeyEngine' 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) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.scene.control;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector3f;
import com.jme3.renderer.Camera;
import com.jme3.renderer.RenderManager;
import com.jme3.renderer.ViewPort;
import com.jme3.scene.Spatial;
import com.jme3.util.TempVars;
import java.io.IOException;
/**
* This Control maintains a reference to a Camera,
* which will be synched with the position (worldTranslation)
* of the current spatial.
* @author tim
*/
public class CameraControl extends AbstractControl {
public static enum ControlDirection {
/**
* Means, that the Camera's transform is "copied"
* to the Transform of the Spatial.
*/
CameraToSpatial,
/**
* Means, that the Spatial's transform is "copied"
* to the Transform of the Camera.
*/
SpatialToCamera;
}
private Camera camera;
private ControlDirection controlDir = ControlDirection.CameraToSpatial;
/**
* Constructor used for Serialization.
*/
public CameraControl() {
}
/**
* @param camera The Camera to be synced.
*/
public CameraControl(Camera camera) {
this.camera = camera;
}
/**
* @param camera The Camera to be synced.
*/
public CameraControl(Camera camera, ControlDirection controlDir) {
this.camera = camera;
this.controlDir = controlDir;
}
public Camera getCamera() {
return camera;
}
public void setCamera(Camera camera) {
this.camera = camera;
}
public ControlDirection getControlDir() {
return controlDir;
}
public void setControlDir(ControlDirection controlDir) {
this.controlDir = controlDir;
}
// fields used, when inversing ControlDirection:
@Override
protected void controlUpdate(float tpf) {
if (spatial != null && camera != null) {
switch (controlDir) {
case SpatialToCamera:
camera.setLocation(spatial.getWorldTranslation());
camera.setRotation(spatial.getWorldRotation());
break;
case CameraToSpatial:
// set the localtransform, so that the worldtransform would be equal to the camera's transform.
// Location:
TempVars vars = TempVars.get();
Vector3f vecDiff = vars.vect1.set(camera.getLocation()).subtractLocal(spatial.getWorldTranslation());
spatial.setLocalTranslation(vecDiff.addLocal(spatial.getLocalTranslation()));
// Rotation:
Quaternion worldDiff = vars.quat1.set(camera.getRotation()).subtractLocal(spatial.getWorldRotation());
spatial.setLocalRotation(worldDiff.addLocal(spatial.getLocalRotation()));
vars.release();
break;
}
}
}
@Override
protected void controlRender(RenderManager rm, ViewPort vp) {
// nothing to do
}
@Override
public Control cloneForSpatial(Spatial newSpatial) {
CameraControl control = new CameraControl(camera, controlDir);
control.setSpatial(newSpatial);
control.setEnabled(isEnabled());
return control;
}
private static final String CONTROL_DIR_NAME = "controlDir";
@Override
public void read(JmeImporter im) throws IOException {
super.read(im);
im.getCapsule(this).readEnum(CONTROL_DIR_NAME,
ControlDirection.class, ControlDirection.SpatialToCamera);
}
@Override
public void write(JmeExporter ex) throws IOException {
super.write(ex);
ex.getCapsule(this).write(controlDir, CONTROL_DIR_NAME,
ControlDirection.SpatialToCamera);
}
}
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