/*
* Java port of Bullet (c) 2008 Martin Dvorak <jezek2@advel.cz>
*
* Bullet Continuous Collision Detection and Physics Library
* Copyright (c) 2003-2008 Erwin Coumans http://www.bulletphysics.com/
*
* This software is provided 'as-is', without any express or implied warranty.
* In no event will the authors be held liable for any damages arising from
* the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
package com.bulletphysics.collision.dispatch;
import com.bulletphysics.collision.broadphase.CollisionAlgorithm;
import com.bulletphysics.collision.broadphase.CollisionAlgorithmConstructionInfo;
import com.bulletphysics.collision.broadphase.Dispatcher;
import com.bulletphysics.collision.broadphase.DispatcherInfo;
import com.bulletphysics.collision.narrowphase.PersistentManifold;
import com.bulletphysics.collision.shapes.CollisionShape;
import com.bulletphysics.collision.shapes.TriangleCallback;
import com.bulletphysics.collision.shapes.TriangleShape;
import com.bulletphysics.linearmath.Transform;
import com.bulletphysics.util.Stack;
import javax.vecmath.Vector3f;
/**
* For each triangle in the concave mesh that overlaps with the AABB of a convex
* (see {@link #convexBody} field), processTriangle is called.
*
* @author jezek2
*/
class ConvexTriangleCallback extends TriangleCallback {
//protected final BulletStack stack = BulletStack.get();
private CollisionObject convexBody;
private CollisionObject triBody;
private final Vector3f aabbMin = new Vector3f();
private final Vector3f aabbMax = new Vector3f();
private ManifoldResult resultOut;
private Dispatcher dispatcher;
private DispatcherInfo dispatchInfoPtr;
private float collisionMarginTriangle;
public int triangleCount;
public PersistentManifold manifoldPtr;
public ConvexTriangleCallback(Dispatcher dispatcher, CollisionObject body0, CollisionObject body1, boolean isSwapped) {
this.dispatcher = dispatcher;
this.dispatchInfoPtr = null;
convexBody = isSwapped ? body1 : body0;
triBody = isSwapped ? body0 : body1;
//
// create the manifold from the dispatcher 'manifold pool'
//
manifoldPtr = dispatcher.getNewManifold(convexBody, triBody);
clearCache();
}
public void destroy() {
clearCache();
dispatcher.releaseManifold(manifoldPtr);
}
public void setTimeStepAndCounters(float collisionMarginTriangle, DispatcherInfo dispatchInfo, ManifoldResult resultOut) {
this.dispatchInfoPtr = dispatchInfo;
this.collisionMarginTriangle = collisionMarginTriangle;
this.resultOut = resultOut;
Stack stack = Stack.enter();
// recalc aabbs
Transform convexInTriangleSpace = stack.allocTransform();
triBody.getWorldTransform(convexInTriangleSpace);
convexInTriangleSpace.inverse();
convexInTriangleSpace.mul(convexBody.getWorldTransform(stack.allocTransform()));
CollisionShape convexShape = (CollisionShape)convexBody.getCollisionShape();
//CollisionShape* triangleShape = static_cast<btCollisionShape*>(triBody->m_collisionShape);
convexShape.getAabb(convexInTriangleSpace, aabbMin, aabbMax);
float extraMargin = collisionMarginTriangle;
Vector3f extra = stack.allocVector3f();
extra.set(extraMargin, extraMargin, extraMargin);
aabbMax.add(extra);
aabbMin.sub(extra);
stack.leave();
}
private CollisionAlgorithmConstructionInfo ci = new CollisionAlgorithmConstructionInfo();
private TriangleShape tm = new TriangleShape();
public void processTriangle(Vector3f[] triangle, int partId, int triangleIndex) {
// just for debugging purposes
//printf("triangle %d",m_triangleCount++);
// aabb filter is already applied!
ci.dispatcher1 = dispatcher;
CollisionObject ob = (CollisionObject) triBody;
// debug drawing of the overlapping triangles
if (dispatchInfoPtr != null && dispatchInfoPtr.debugDraw != null && dispatchInfoPtr.debugDraw.getDebugMode() > 0) {
Stack stack = Stack.enter();
Vector3f color = stack.allocVector3f();
color.set(255, 255, 0);
Transform tr = ob.getWorldTransform(stack.allocTransform());
Vector3f tmp1 = stack.allocVector3f();
Vector3f tmp2 = stack.allocVector3f();
tmp1.set(triangle[0]); tr.transform(tmp1);
tmp2.set(triangle[1]); tr.transform(tmp2);
dispatchInfoPtr.debugDraw.drawLine(tmp1, tmp2, color);
tmp1.set(triangle[1]); tr.transform(tmp1);
tmp2.set(triangle[2]); tr.transform(tmp2);
dispatchInfoPtr.debugDraw.drawLine(tmp1, tmp2, color);
tmp1.set(triangle[2]); tr.transform(tmp1);
tmp2.set(triangle[0]); tr.transform(tmp2);
dispatchInfoPtr.debugDraw.drawLine(tmp1, tmp2, color);
//btVector3 center = triangle[0] + triangle[1]+triangle[2];
//center *= btScalar(0.333333);
//m_dispatchInfoPtr->m_debugDraw->drawLine(tr(triangle[0]),tr(center),color);
//m_dispatchInfoPtr->m_debugDraw->drawLine(tr(triangle[1]),tr(center),color);
//m_dispatchInfoPtr->m_debugDraw->drawLine(tr(triangle[2]),tr(center),color);
stack.leave();
}
//btCollisionObject* colObj = static_cast<btCollisionObject*>(m_convexProxy->m_clientObject);
if (convexBody.getCollisionShape().isConvex()) {
tm.init(triangle[0], triangle[1], triangle[2]);
tm.setMargin(collisionMarginTriangle);
CollisionShape tmpShape = ob.getCollisionShape();
ob.internalSetTemporaryCollisionShape(tm);
CollisionAlgorithm colAlgo = ci.dispatcher1.findAlgorithm(convexBody, triBody, manifoldPtr);
// this should use the btDispatcher, so the actual registered algorithm is used
// btConvexConvexAlgorithm cvxcvxalgo(m_manifoldPtr,ci,m_convexBody,m_triBody);
resultOut.setShapeIdentifiers(-1, -1, partId, triangleIndex);
//cvxcvxalgo.setShapeIdentifiers(-1,-1,partId,triangleIndex);
//cvxcvxalgo.processCollision(m_convexBody,m_triBody,*m_dispatchInfoPtr,m_resultOut);
colAlgo.processCollision(convexBody, triBody, dispatchInfoPtr, resultOut);
//colAlgo.destroy();
ci.dispatcher1.freeCollisionAlgorithm(colAlgo);
ob.internalSetTemporaryCollisionShape(tmpShape);
}
}
public void clearCache() {
dispatcher.clearManifold(manifoldPtr);
}
public Vector3f getAabbMin(Vector3f out) {
out.set(aabbMin);
return out;
}
public Vector3f getAabbMax(Vector3f out) {
out.set(aabbMax);
return out;
}
}