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source: downloads/ogreode/include/OgreOdeBody.h @ 21

Last change on this file since 21 was 21, checked in by nicolasc, 16 years ago
added ogreode and Colladaplugin
File size: 12.2 KB

Line
1	#ifndef _OGREODEBODY_H_
2	#define _OGREODEBODY_H_
3
4	#include "OgreOdePreReqs.h"
5
6	namespace OgreOde
7	{
8	//-----------------------------------------------------------------------
9	class _OgreOdeExport BodyState
10	{
11	public:
12	BodyState(){};
13	BodyState(const Ogre::Vector3 &position,
14	const Ogre::Quaternion &orientation);
15
16	void operator=(const BodyState &other);
17	bool operator==(const BodyState &other) const;
18	bool operator!=(const BodyState &other) const;
19
20	//-----------------------------------------------------------------------
21	/// compare with another physics state for "significant" differences.
22	/// used for detecting position or orientation snaps which need smoothing.
23	bool isDifferent(const BodyState &other, const Ogre::Real threshold = Ogre::Real(0.01)) const;
24
25	void interpolate(const BodyState * const _previous_state,
26	const BodyState * const _current_state,
27	const Ogre::Real alpha);
28
29	Ogre::Vector3 _position;
30	Ogre::Quaternion _orientation;
31	};
32
33	//-----------------------------------------------------------------------
34	template <class T>
35	class _OgreOdeExport CircularBuffer
36	{
37	public:
38
39	CircularBuffer() :
40	head (0),
41	tail (0)
42	{
43	}
44
45	void resize(const size_t size)
46	{
47	head = 0;
48	tail = 0;
49	buffers.resize(size);
50	}
51
52	size_t size()
53	{
54	int count = (int)head - (int)tail;
55	if (count<0)
56	count += (int) buffers.size();
57	return (size_t) count;
58	}
59
60	void add(const T &buffer)
61	{
62	buffers[head] = buffer;
63	next(head);
64
65	}
66
67	void remove()
68	{
69	assert(!empty());
70	next(tail);
71	}
72
73	T& oldest()
74	{
75	assert(!empty());
76	return buffers[tail];
77	}
78
79	T& newest()
80	{
81	assert(!empty());
82	int index = (int)head - 1;
83	if (index == -1)
84	index = (int) buffers.size() - 1;
85	return buffers[index];
86	}
87
88	T& almostNewest()
89	{
90	assert(buffers.size() > 1);
91	int index = (int)head - 2;
92	if (index == -1)
93	index = (int) buffers.size() - 1;
94	return buffers[index];
95	}
96
97	bool empty() const
98	{
99	return head == tail;
100	}
101
102	void next(size_t &index)
103	{
104	if (index == (size_t)buffers.size())
105	index -= (size_t)buffers.size();
106	else
107	index ++;
108	}
109
110	void previous(size_t &index)
111	{
112	if ((int)index - 1 < 0)
113	index += (size_t)buffers.size();
114	else
115	index --;
116	}
117
118	T& operator[](size_t index)
119	{
120	assert(index<(size_t)buffers.size());
121	return buffers[index];
122	}
123
124	public:
125
126	size_t head;
127	size_t tail;
128
129	private:
130	std::vector<T> buffers;
131	};
132	/**
133	This object is the class defining a for all Dynamically physical objects in OgreOde.
134	@remarks
135	This object is tied attached to a scene node,
136	or/and tied a Entity Object using UserDefinedObject
137	@remarks
138	It extends the OGRE UserDefinedObject to allow reverse links from Ogre::Entity.
139	It extends the OGRE MovableObject to allow scene node attachment.
140	*/
141	class _OgreOdeExport Body : public Ogre::MovableObject, public Ogre::UserDefinedObject
142	{
143	friend class Joint;
144	friend class World;
145	friend class Geometry;
146
147	public:
148	Body(World *world, const Ogre::String& name = Ogre::StringUtil::BLANK);
149	virtual ~Body();
150
151	static const Ogre::String MovableType;
152
153	void _historyResize(const size_t size);
154	inline void updateParentNode();
155	inline void updatePreviousState();
156	inline void updateCurrentState();
157	inline void updateDrawState ();
158	inline void interpolateDrawState(const Ogre::Real alpha);
159	inline void synchronise();
160
161	void deriveLocation();
162
163	void setPosition(const Ogre::Vector3& position);
164	void setOrientation(const Ogre::Quaternion& orientation);
165	void setLinearVelocity(const Ogre::Vector3& linear_velocity);
166	void setAngularVelocity(const Ogre::Vector3& angular_velocity);
167
168	inline const Ogre::Vector3& getPosition() const;
169
170	inline const Ogre::Quaternion& getOrientation() const;
171	inline void updatePosition(BodyState * const bodystate);
172	inline void updateOrientation(BodyState * const bodystate);
173
174	const Ogre::Vector3& getLinearVelocity();
175	const Ogre::Vector3& getAngularVelocity();
176
177	virtual const Ogre::String& getMovableType() const;
178	virtual void _notifyAttached(Ogre::Node* parent,bool isTagPoint = false);
179	virtual const Ogre::String& getName(void) const;
180	virtual void _notifyCurrentCamera(Ogre::Camera* camera);
181	virtual const Ogre::AxisAlignedBox& getBoundingBox(void) const;
182	virtual Ogre::Real getBoundingRadius(void) const;
183	virtual void _updateRenderQueue(Ogre::RenderQueue* queue);
184
185	void setMass(const Mass& mass);
186	const Mass& getMass();
187
188	void addForce(const Ogre::Vector3& force);
189	void addTorque(const Ogre::Vector3& torque);
190	void addRelativeForce(const Ogre::Vector3& force);
191	void addRelativeTorque(const Ogre::Vector3& torque);
192	void addForceAt(const Ogre::Vector3& force,const Ogre::Vector3& position);
193	void addForceAtRelative(const Ogre::Vector3& force,const Ogre::Vector3& position);
194	void addRelativeForceAt(const Ogre::Vector3& force,const Ogre::Vector3& position);
195	void addRelativeForceAtRelative(const Ogre::Vector3& force,const Ogre::Vector3& position);
196
197	const Ogre::Vector3& getForce();
198	const Ogre::Vector3& getTorque();
199	void setForce(const Ogre::Vector3&);
200	void setTorque(const Ogre::Vector3&);
201
202
203	Ogre::Vector3 getPointWorldPosition(const Ogre::Vector3& position);
204	Ogre::Vector3 getPointWorldVelocity(const Ogre::Vector3& position);
205	Ogre::Vector3 getPointVelocity(const Ogre::Vector3& position);
206	Ogre::Vector3 getPointBodyPosition(const Ogre::Vector3& position);
207	Ogre::Vector3 getVectorToWorld(const Ogre::Vector3& vector);
208	Ogre::Vector3 getVectorFromWorld(const Ogre::Vector3& vector);
209
210	void wake();
211	void sleep();
212	inline bool isAwake() const;
213	void setAutoSleep(bool auto_sleep);
214	bool getAutoSleep();
215	void setAutoSleepLinearThreshold(Ogre::Real linear_threshold);
216	Ogre::Real getAutoSleepLinearThreshold();
217	void setAutoSleepAngularThreshold(Ogre::Real angular_threshold);
218	Ogre::Real getAutoSleepAngularThreshold();
219	void setAutoSleepSteps(int steps);
220	int getAutoSleepSteps();
221	void setAutoSleepTime(Ogre::Real time);
222	Ogre::Real getAutoSleepTime();
223	void setAutoSleepDefaults();
224
225	void setFiniteRotationMode(bool on);
226	bool getFiniteRotationMode();
227	void setFiniteRotationAxis(const Ogre::Vector3& axis);
228	const Ogre::Vector3& getFiniteRotationAxis();
229
230	int getJointCount();
231	Joint* getJoint(int index);
232
233	void setModifyParentOrientation(bool bModify);
234
235	void addGeometry(Geometry *g);
236	void removeGeometry(Geometry *g);
237	size_t getGeometryCount();
238	Geometry* getGeometry(int index);
239	GeometryArray* getGeometries();
240
241	void setAffectedByGravity(bool on);
242	bool getAffectedByGravity();
243
244	void setDamping(Ogre::Real linear_damping, Ogre::Real angular_damping);
245	void setLinearDamping(Ogre::Real linear_damping);
246	void setAngularDamping(Ogre::Real angular_damping);
247	Ogre::Real getLinearDamping();
248	Ogre::Real getAngularDamping();
249
250	void setUserData(unsigned long user_data);
251	unsigned long getUserData();
252
253	virtual unsigned long getID();
254	virtual void setDebug(const bool debug);
255
256	/** Return a string identifying the type of user defined object.
257	@remarks
258	Used to differentiate between different Bodies, Geometries and prefab_object
259	*/
260	const Ogre::String& getTypeName(void) const
261	{static Ogre::String sName("Body");return sName;};
262
263	bool collide(void* data, Geometry *g);
264	bool collide(void* data, Body *b);
265	bool collidePlaneBounds(void* data, Ogre::SceneQuery::WorldFragment *);
266
267	protected:
268	dBodyID getBodyID() const;
269
270	void destroyDebugNode();
271	void addDebugNode(Ogre::Node* node);
272
273	void recursiveSetMode(Ogre::SceneNode* node);
274
275	void applyDamping();
276
277	protected:
278	dBodyID _body;
279	Ogre::String _name;
280	Ogre::Node* _debug_node;
281
282	static int _body_count;
283
284	Ogre::Vector3 _linear_vel;
285	Ogre::Vector3 _angular_vel;
286	Ogre::Vector3 _finite_axis;
287	Ogre::Vector3 _force;
288	Ogre::Vector3 _torque;
289	Ogre::AxisAlignedBox _bounding_box;
290	Mass* _mass;
291
292	bool _is_damped;
293	bool _is_linear_damped;
294	dReal _linear_damping;
295	bool _is_angular_damped;
296	dReal _angular_damping;
297
298	unsigned long _user_data;
299
300	// Major members
301	bool _isEnabled;
302	bool _modify_parent_orientation;
303
304	BodyState _draw_state;
305	CircularBuffer<BodyState *> _state_history;
306
307	/// Collision proxies, must be set up if collision enabled
308	GeometryArray _geometries;
309
310	World *_world;
311
312	};
313
314	//-----------------------------------------------------------------------
315	inline bool Body::isAwake() const { return _isEnabled; }
316	//-----------------------------------------------------------------------
317	inline void Body::updateParentNode()
318	{
319	if (mParentNode)
320	{
321	mParentNode->setPosition(_draw_state._position);
322	mParentNode->setOrientation(_draw_state._orientation);
323	}
324
325	if (_debug_node)
326	{
327	_debug_node->setPosition(_draw_state._position);
328	_debug_node->setOrientation(_draw_state._orientation);
329
330	recursiveSetMode(static_cast<Ogre::SceneNode*>(_debug_node));
331	}
332	}
333	//-----------------------------------------------------------------------
334	inline void Body::updatePreviousState()
335	{
336	_isEnabled = dBodyIsEnabled(_body) \|\| _debug_node;
337	if (_isEnabled)
338	{
339	BodyState *previous = _state_history.almostNewest ();
340	updatePosition (previous);
341	updateOrientation (previous);
342	}
343	}
344	//-----------------------------------------------------------------------
345	inline void Body::updateCurrentState()
346	{
347	_isEnabled = dBodyIsEnabled(_body) \|\| _debug_node;
348	if (_isEnabled)
349	{
350	BodyState *current = _state_history.newest ();
351	updatePosition(current);
352	updateOrientation(current);
353	}
354	}
355	//-----------------------------------------------------------------------
356	inline void Body::updateDrawState ()
357	{
358	_isEnabled = dBodyIsEnabled(_body) \|\| _debug_node;
359	if (_isEnabled)
360	{
361	updatePosition(&_draw_state);
362	updateOrientation(&_draw_state);
363	}
364	}
365	//-----------------------------------------------------------------------
366	inline void Body::interpolateDrawState(const Ogre::Real alpha)
367	{
368	if (_isEnabled)
369	{
370	BodyState *current = _state_history.newest ();
371	BodyState *previous = _state_history.almostNewest ();
372	assert (current != previous);
373	_draw_state.interpolate (previous, current, alpha);
374	}
375	}
376	//-----------------------------------------------------------------------
377	inline void Body::synchronise()
378	{
379	if (_isEnabled)
380	{
381	if (_is_damped)
382	applyDamping();
383	updateParentNode();
384	}
385	}
386	//-----------------------------------------------------------------------
387	inline const Ogre::Vector3& Body::getPosition() const
388	{
389	return _draw_state._position;
390	}
391	//-----------------------------------------------------------------------
392	inline const Ogre::Quaternion& Body::getOrientation() const
393	{
394	return _draw_state._orientation;
395	}
396	//-----------------------------------------------------------------------
397	inline void Body::updatePosition(BodyState * const bodystate)
398	{
399	const dReal * const position = dBodyGetPosition(_body);
400
401	bodystate->_position.x = (Ogre::Real)position[0];
402	bodystate->_position.y = (Ogre::Real)position[1];
403	bodystate->_position.z = (Ogre::Real)position[2];
404	}
405	//-----------------------------------------------------------------------
406	inline void Body::updateOrientation(BodyState * const bodystate)
407	{
408	const dReal * const orientation = dBodyGetQuaternion(_body);
409	bodystate->_orientation.w = (Ogre::Real)orientation[0];
410	bodystate->_orientation.x = (Ogre::Real)orientation[1];
411	bodystate->_orientation.y = (Ogre::Real)orientation[2];
412	bodystate->_orientation.z = (Ogre::Real)orientation[3];
413	}
414	//-----------------------------------------------------------------------
415	}
416
417	#endif

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