blender/source/gameengine/Ketsji/KX_IPO_SGController.h
Benoit Bolsee 005c5e6371 BGE bug #17657 fixed: dRotY doesn't work properly after 90 degrees rotation.
This problem is caused by discontinuities in the conversion
orientation matrix -> euler angles: the angle sign can
switch and thus the direction of the rotation produced
by the dRot Ipo.

To avoid this bug, the matrix->euler conversion must be 
avoided during the game. I took the following approach that 
is compatible with Blender (identical effect in the game and
in the 3D view):

- no change in Add mode: Rot and dRot are treated as additional
rotation to the orientation at the start of the Ipo. There is 
no matrix->euler conversion and thus no discontinuities. 

- Rot Ipo are treated as absolute rotation. All 3 axis should
be specified but if they are not, the startup object orientation
will be used to set the unspecified axis. By doing a matrix->
euler conversion once at the start, the discontinuities are
avoided. If there are also dRot curves, they are treated as
delta of the corresponding Rot curve or startup angle.

- dRot Ipo are treated as Add mode in Local axis.

Note about Add mode: Rot and dRot curves are treated identically
during the game. However, only dRot curves make sense because
they don't interfere with the object orientation in the 3D view.
2008-09-23 20:07:15 +00:00

124 lines
3.4 KiB
C++

/**
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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 2
* 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, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
#ifndef __IPO_SGCONTROLLER_H
#define __IPO_SGCONTROLLER_H
#include "SG_Controller.h"
#include "SG_Spatial.h"
#include "KX_IPOTransform.h"
#include "KX_IInterpolator.h"
#define KX_MAX_IPO_CHANNELS 19 //note- [0] is not used
class KX_IpoSGController : public SG_Controller
{
KX_IPOTransform m_ipo_xform;
T_InterpolatorList m_interpolators;
/** Flag for each IPO channel that can be applied to a game object */
bool m_ipo_channels_active[KX_MAX_IPO_CHANNELS];
/** Interpret the ipo as a force rather than a displacement? */
bool m_ipo_as_force;
/** Add Ipo curve to current loc/rot/scale */
bool m_ipo_add;
/** Ipo must be applied in local coordinate rather than in global coordinates (used for force and Add mode)*/
bool m_ipo_local;
/** Were settings altered since the last update? */
bool m_modified;
/** Local time of this ipo.*/
double m_ipotime;
/** Location of the object when the IPO is first fired (for local transformations) */
class MT_Point3 m_ipo_start_point;
/** Orientation of the object when the IPO is first fired (for local transformations) */
class MT_Matrix3x3 m_ipo_start_orient;
/** Scale of the object when the IPO is first fired (for local transformations) */
class MT_Vector3 m_ipo_start_scale;
/** if IPO initial position has been set for local normal IPO */
bool m_ipo_start_initialized;
/** Euler angles at the start of the game, needed for incomplete ROT Ipo curves */
class MT_Vector3 m_ipo_start_euler;
/** true is m_ipo_start_euler has been initialized */
bool m_ipo_euler_initialized;
/** A reference to the original game object. */
class KX_GameObject* m_game_object;
public:
KX_IpoSGController();
virtual ~KX_IpoSGController();
virtual SG_Controller* GetReplica(class SG_Node* destnode);
void
SetOption(
int option,
int value
);
/** Set sumo data. */
void UpdateSumoReference();
/** Set reference to the corresponding game object. */
void SetGameObject(class KX_GameObject*);
void SetIPOChannelActive(int index, bool value) {
//indexes found in makesdna\DNA_ipo_types.h
m_ipo_channels_active[index] = value;
}
KX_IPOTransform& GetIPOTransform()
{
return m_ipo_xform;
}
void AddInterpolator(KX_IInterpolator* interp);
virtual bool Update(double time);
virtual void SetSimulatedTime(double time)
{
m_ipotime = time;
m_modified = true;
}
};
#endif //__IPO_SGCONTROLLER_H