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Diffstat (limited to 'engine/src/core/com/jme3/scene/control/CameraControl.java')
| -rw-r--r-- | engine/src/core/com/jme3/scene/control/CameraControl.java | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/engine/src/core/com/jme3/scene/control/CameraControl.java b/engine/src/core/com/jme3/scene/control/CameraControl.java new file mode 100644 index 0000000..5dd559c --- /dev/null +++ b/engine/src/core/com/jme3/scene/control/CameraControl.java @@ -0,0 +1,159 @@ +/* + * 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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