/*
* Copyright (c) 2009-2012 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.bullet.util;
import com.jme3.bounding.BoundingBox;
import com.jme3.bullet.collision.shapes.*;
import com.jme3.bullet.collision.shapes.infos.ChildCollisionShape;
import com.jme3.math.Matrix3f;
import com.jme3.math.Transform;
import com.jme3.math.Vector3f;
import com.jme3.scene.*;
import com.jme3.terrain.geomipmap.TerrainPatch;
import com.jme3.terrain.geomipmap.TerrainQuad;
import java.util.Iterator;
import java.util.LinkedList;
/**
*
* @author normenhansen, tim8dev
*/
public class CollisionShapeFactory {
/**
* returns the correct transform for a collisionshape in relation
* to the ancestor for which the collisionshape is generated
* @param spat
* @param parent
* @return
*/
private static Transform getTransform(Spatial spat, Spatial parent) {
Transform shapeTransform = new Transform();
Spatial parentNode = spat.getParent() != null ? spat.getParent() : spat;
Spatial currentSpatial = spat;
//if we have parents combine their transforms
while (parentNode != null) {
if (parent == currentSpatial) {
//real parent -> only apply scale, not transform
Transform trans = new Transform();
trans.setScale(currentSpatial.getLocalScale());
shapeTransform.combineWithParent(trans);
parentNode = null;
} else {
shapeTransform.combineWithParent(currentSpatial.getLocalTransform());
parentNode = currentSpatial.getParent();
currentSpatial = parentNode;
}
}
return shapeTransform;
}
private static CompoundCollisionShape createCompoundShape(Node realRootNode,
Node rootNode, CompoundCollisionShape shape, boolean meshAccurate, boolean dynamic) {
for (Spatial spatial : rootNode.getChildren()) {
if (spatial instanceof TerrainQuad) {
Boolean bool = spatial.getUserData(UserData.JME_PHYSICSIGNORE);
if (bool != null && bool.booleanValue()) {
continue; // go to the next child in the loop
}
TerrainQuad terrain = (TerrainQuad) spatial;
Transform trans = getTransform(spatial, realRootNode);
shape.addChildShape(new HeightfieldCollisionShape(terrain.getHeightMap(), trans.getScale()),
trans.getTranslation(),
trans.getRotation().toRotationMatrix());
} else if (spatial instanceof Node) {
createCompoundShape(realRootNode, (Node) spatial, shape, meshAccurate, dynamic);
} else if (spatial instanceof TerrainPatch) {
Boolean bool = spatial.getUserData(UserData.JME_PHYSICSIGNORE);
if (bool != null && bool.booleanValue()) {
continue; // go to the next child in the loop
}
TerrainPatch terrain = (TerrainPatch) spatial;
Transform trans = getTransform(spatial, realRootNode);
shape.addChildShape(new HeightfieldCollisionShape(terrain.getHeightMap(), terrain.getLocalScale()),
trans.getTranslation(),
trans.getRotation().toRotationMatrix());
} else if (spatial instanceof Geometry) {
Boolean bool = spatial.getUserData(UserData.JME_PHYSICSIGNORE);
if (bool != null && bool.booleanValue()) {
continue; // go to the next child in the loop
}
if (meshAccurate) {
CollisionShape childShape = dynamic
? createSingleDynamicMeshShape((Geometry) spatial, realRootNode)
: createSingleMeshShape((Geometry) spatial, realRootNode);
if (childShape != null) {
Transform trans = getTransform(spatial, realRootNode);
shape.addChildShape(childShape,
trans.getTranslation(),
trans.getRotation().toRotationMatrix());
}
} else {
Transform trans = getTransform(spatial, realRootNode);
shape.addChildShape(createSingleBoxShape(spatial, realRootNode),
trans.getTranslation(),
trans.getRotation().toRotationMatrix());
}
}
}
return shape;
}
private static CompoundCollisionShape createCompoundShape(
Node rootNode, CompoundCollisionShape shape, boolean meshAccurate) {
return createCompoundShape(rootNode, rootNode, shape, meshAccurate, false);
}
/**
* This type of collision shape is mesh-accurate and meant for immovable "world objects".
* Examples include terrain, houses or whole shooter levels.<br>
* Objects with "mesh" type collision shape will not collide with each other.
*/
private static CompoundCollisionShape createMeshCompoundShape(Node rootNode) {
return createCompoundShape(rootNode, new CompoundCollisionShape(), true);
}
/**
* This type of collision shape creates a CompoundShape made out of boxes that
* are based on the bounds of the Geometries in the tree.
* @param rootNode
* @return
*/
private static CompoundCollisionShape createBoxCompoundShape(Node rootNode) {
return createCompoundShape(rootNode, new CompoundCollisionShape(), false);
}
/**
* This type of collision shape is mesh-accurate and meant for immovable "world objects".
* Examples include terrain, houses or whole shooter levels.<br/>
* Objects with "mesh" type collision shape will not collide with each other.<br/>
* Creates a HeightfieldCollisionShape if the supplied spatial is a TerrainQuad.
* @return A MeshCollisionShape or a CompoundCollisionShape with MeshCollisionShapes as children if the supplied spatial is a Node. A HeightieldCollisionShape if a TerrainQuad was supplied.
*/
public static CollisionShape createMeshShape(Spatial spatial) {
if (spatial instanceof TerrainQuad) {
TerrainQuad terrain = (TerrainQuad) spatial;
return new HeightfieldCollisionShape(terrain.getHeightMap(), terrain.getLocalScale());
} else if (spatial instanceof TerrainPatch) {
TerrainPatch terrain = (TerrainPatch) spatial;
return new HeightfieldCollisionShape(terrain.getHeightMap(), terrain.getLocalScale());
} else if (spatial instanceof Geometry) {
return createSingleMeshShape((Geometry) spatial, spatial);
} else if (spatial instanceof Node) {
return createMeshCompoundShape((Node) spatial);
} else {
throw new IllegalArgumentException("Supplied spatial must either be Node or Geometry!");
}
}
/**
* This method creates a hull shape for the given Spatial.<br>
* If you want to have mesh-accurate dynamic shapes (CPU intense!!!) use GImpact shapes, its probably best to do so with a low-poly version of your model.
* @return A HullCollisionShape or a CompoundCollisionShape with HullCollisionShapes as children if the supplied spatial is a Node.
*/
public static CollisionShape createDynamicMeshShape(Spatial spatial) {
if (spatial instanceof Geometry) {
return createSingleDynamicMeshShape((Geometry) spatial, spatial);
} else if (spatial instanceof Node) {
return createCompoundShape((Node) spatial, (Node) spatial, new CompoundCollisionShape(), true, true);
} else {
throw new IllegalArgumentException("Supplied spatial must either be Node or Geometry!");
}
}
public static CollisionShape createBoxShape(Spatial spatial) {
if (spatial instanceof Geometry) {
return createSingleBoxShape((Geometry) spatial, spatial);
} else if (spatial instanceof Node) {
return createBoxCompoundShape((Node) spatial);
} else {
throw new IllegalArgumentException("Supplied spatial must either be Node or Geometry!");
}
}
/**
* This type of collision shape is mesh-accurate and meant for immovable "world objects".
* Examples include terrain, houses or whole shooter levels.<br>
* Objects with "mesh" type collision shape will not collide with each other.
*/
private static MeshCollisionShape createSingleMeshShape(Geometry geom, Spatial parent) {
Mesh mesh = geom.getMesh();
Transform trans = getTransform(geom, parent);
if (mesh != null && mesh.getMode() == Mesh.Mode.Triangles) {
MeshCollisionShape mColl = new MeshCollisionShape(mesh);
mColl.setScale(trans.getScale());
return mColl;
} else {
return null;
}
}
/**
* Uses the bounding box of the supplied spatial to create a BoxCollisionShape
* @param spatial
* @return BoxCollisionShape with the size of the spatials BoundingBox
*/
private static BoxCollisionShape createSingleBoxShape(Spatial spatial, Spatial parent) {
//TODO: using world bound here instead of "local world" bound...
BoxCollisionShape shape = new BoxCollisionShape(
((BoundingBox) spatial.getWorldBound()).getExtent(new Vector3f()));
return shape;
}
/**
* This method creates a hull collision shape for the given mesh.<br>
*/
private static HullCollisionShape createSingleDynamicMeshShape(Geometry geom, Spatial parent) {
Mesh mesh = geom.getMesh();
Transform trans = getTransform(geom, parent);
if (mesh != null) {
HullCollisionShape dynamicShape = new HullCollisionShape(mesh);
dynamicShape.setScale(trans.getScale());
return dynamicShape;
} else {
return null;
}
}
/**
* This method moves each child shape of a compound shape by the given vector
* @param vector
*/
public static void shiftCompoundShapeContents(CompoundCollisionShape compoundShape, Vector3f vector) {
for (Iterator<ChildCollisionShape> it = new LinkedList(compoundShape.getChildren()).iterator(); it.hasNext();) {
ChildCollisionShape childCollisionShape = it.next();
CollisionShape child = childCollisionShape.shape;
Vector3f location = childCollisionShape.location;
Matrix3f rotation = childCollisionShape.rotation;
compoundShape.removeChildShape(child);
compoundShape.addChildShape(child, location.add(vector), rotation);
}
}
}