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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#ifndef plConvexVolume_inc
#define plConvexVolume_inc
#include "pnSceneObject/plObjInterface.h"
struct hsPlane3;
struct hsPoint3;
struct hsMatrix44;
class hsResMgr;
// A convex volume defined by several boundary planes
// For now it assumes the user won't add planes that make it concave
class plConvexVolume : public plCreatable
{
public:
plConvexVolume();
~plConvexVolume();
CLASSNAME_REGISTER( plConvexVolume );
GETINTERFACE_ANY( plConvexVolume, plCreatable );
void Update(const hsMatrix44 &l2w);
hsBool AddPlane(const hsPlane3 &plane);
void SetNumPlanesAndClear(const UInt32 num);
void SetPlane(const hsPlane3 &plane, const UInt32 index);
// If you only care about the test, call this. Otherwise call ResolvePoint.
hsBool IsInside(const hsPoint3 &pos) const;
// returns true if the point was inside the volume, and thus moved outward.
hsBool ResolvePoint(hsPoint3 &pos) const;
// returns true if the point was inside and pos and velocity updated to bounce off offending plane.
// input bounce==1.f for perfect bounce, bounce==0 to slide.
hsBool BouncePoint(hsPoint3 &pos, hsVector3 &velocity, hsScalar bounce, hsScalar friction) const;
inline hsBool TestPlane(const hsPoint3 &pos, const hsPlane3 &plane) const; // Is the point inside the plane?
virtual void Read(hsStream* s, hsResMgr *mgr);
virtual void Write(hsStream* s, hsResMgr *mgr);
//virtual hsBool MsgReceive(plMessage* msg);
protected:
void IClear();
hsPlane3 *fLocalPlanes;
hsPlane3 *fWorldPlanes;
UInt32 fNumPlanes;
};
inline hsBool plConvexVolume::TestPlane(const hsPoint3 &pos, const hsPlane3 &plane) const
{
hsScalar dis = plane.fN.InnerProduct(pos);
dis += plane.fD;
if( dis >= 0.f )
return false;
return true;
}
#endif