Engine directory for ticket #1

Engine/source/T3D/physics/physicsDebris.h

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+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#ifndef _PHYSICS_DEBRIS_H_
+#define _PHYSICS_DEBRIS_H_
+
+#ifndef __RESOURCE_H__
+#include "core/resource.h"
+#endif
+#ifndef _GAMEBASE_H_
+#include "T3D/gameBase/gameBase.h"
+#endif
+#ifndef _T3D_PHYSICSCOMMON_H_
+#include "T3D/physics/physicsCommon.h"
+#endif
+
+
+class TSShapeInstance;
+class TSShape;
+
+//**************************************************************************
+// Debris Data
+//**************************************************************************
+class PhysicsDebrisData : public GameBaseData
+{
+   typedef GameBaseData Parent;
+
+public:
+
+
+   F32      lifetime;
+   F32      lifetimeVariance;
+
+   ///
+   F32 mass;
+
+   /// 
+   F32 dynamicFriction;
+
+   /// 
+   F32 staticFriction;
+
+   ///
+   F32 restitution;
+
+   ///
+   F32 linearDamping;
+
+   ///
+   F32 angularDamping;
+
+   /// 
+   F32 linearSleepThreshold;
+
+   ///
+   F32 angularSleepThreshold;
+
+   // A scale applied to the normal linear and angular damping
+   // when the object enters a water volume.
+   F32 waterDampingScale;
+
+   // The density of this object used for water buoyancy effects.
+   F32 buoyancyDensity;
+
+   /// Is rendererd during shadow passes.
+   bool castShadows;
+
+   const char* shapeName;
+   Resource<TSShape> shape;
+
+   PhysicsDebrisData();
+
+   bool        onAdd();
+   bool        preload( bool server, String &errorStr );
+   static void initPersistFields();
+   void        packData( BitStream *stream );
+   void        unpackData( BitStream *stream );
+
+   DECLARE_CONOBJECT( PhysicsDebrisData );
+
+};
+
+
+
+class PhysicsBody;
+class PhysicsWorld;
+
+
+class PhysicsDebris : public GameBase
+{
+   typedef GameBase Parent;
+
+public:
+
+   /// Helper method which creates debris based on the 
+   /// datablock and initial state.
+   ///
+   /// It can return NULL if the system quality settings 
+   /// are set to disable the debris.
+   ///
+   static PhysicsDebris* create( PhysicsDebrisData *datablock,
+                                 const MatrixF &transform,
+                                 const VectorF &linVel );
+
+   PhysicsDebris();
+   virtual ~PhysicsDebris();
+
+   DECLARE_CONOBJECT(PhysicsDebris);
+   static void initPersistFields();
+
+   bool onAdd();
+   void onRemove(); 
+
+   void applyImpulse( const Point3F &pos, const VectorF &vec );
+   void applyRadialImpulse( const Point3F &origin, F32 radius, F32 magnitude );
+
+protected:
+
+   /// The global object lifetime scalar.
+   static F32 smLifetimeScale;
+
+   void processTick( const Move *move );
+   void advanceTime( F32 dt );
+   void interpolateTick( F32 delta );
+   bool onNewDataBlock( GameBaseData *dptr, bool reload );
+
+   void prepRenderImage( SceneRenderState *state );
+   void prepBatchRender( SceneRenderState *state );
+
+   void _deleteFragments();
+   void _createFragments();
+
+   void _updateForces( PhysicsBody *body, const Box3F &bounds );
+
+   void _findNodes( U32 objId, Vector<U32> &nodeIds );
+
+   void _onPhysicsReset( PhysicsResetEvent reset );
+   
+protected:
+
+   F32 mLifetime;
+
+   Point3F mInitialLinVel;
+
+   PhysicsDebrisData *mDataBlock;
+
+   TSShapeInstance *mShapeInstance;      
+   
+   PhysicsWorld *mWorld;
+
+   struct Fragment
+   {
+      Vector<U32> nodeIds;
+
+      PhysicsBody *body;
+
+      // The delta state.
+      Point3F pos;
+      Point3F lastPos;
+      QuatF rot;
+      QuatF lastRot;
+   };
+
+   typedef Vector<Fragment> FragmentVector;
+
+   FragmentVector mFragments;
+
+};
+
+
+#endif // _PHYSICS_DEBRIS_H_