hkpVariableTimestepper.h
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上传日期:2020-08-09
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其他游戏
开发平台:
Visual C++
- /*
- *
- * Confidential Information of Telekinesys Research Limited (t/a Havok). Not for disclosure or distribution without Havok's
- * prior written consent. This software contains code, techniques and know-how which is confidential and proprietary to Havok.
- * Level 2 and Level 3 source code contains trade secrets of Havok. Havok Software (C) Copyright 1999-2009 Telekinesys Research Limited t/a Havok. All Rights Reserved. Use of this software is subject to the terms of an end user license agreement.
- *
- */
- #ifndef HK_VARIABLETIMESTEPPER_H
- #define HK_VARIABLETIMESTEPPER_H
- class hkpWorld;
- /// This class attempts to keep the stiffness of the system constant when the time step varies from frame to frame.
- ///
- /// This class seems to work for timesteps between 15 fps and 750 fps.
- /// If you fall below the min substep count, the time per substep will change, which will
- /// result in a noticeable change to the system stiffness. However, this is better than the alternative
- /// where the system can totally fail if you fall bellow 2 substeps.
- /// This scheme will result in noticeable jitter. A better scheme that keeps jitter down is to
- /// always step at n*timePerSubstep, accumulate requestedTimeStep - n*timePerSubstep and do an
- /// extra substep when that accumulated ammount > timePerSubstep. Even more solid would be if
- /// you did the same, but with full timesteps rather than substeps.
- class hkpVariableTimestepper
- {
- public:
- HK_DECLARE_NONVIRTUAL_CLASS_ALLOCATOR( HK_MEMORY_CLASS_UTILITIES, hkpVariableTimestepper );
- /// Constructor.
- hkpVariableTimestepper( hkReal timePerSubstep, hkReal minSubstepCount = 2.0f );
- /// Simulate forward in time.
- int step( hkpWorld* world, hkReal timestep );
- /// Time per substep
- hkReal m_timePerSubstep;
- /// Min number of solver substeps allowable
- hkReal m_minSubstepCount;
- };
- #endif // HK_VARIABLETIMESTEPPER_H
- /*
- * Havok SDK - NO SOURCE PC DOWNLOAD, BUILD(#20090216)
- *
- * Confidential Information of Havok. (C) Copyright 1999-2009
- * Telekinesys Research Limited t/a Havok. All Rights Reserved. The Havok
- * Logo, and the Havok buzzsaw logo are trademarks of Havok. Title, ownership
- * rights, and intellectual property rights in the Havok software remain in
- * Havok and/or its suppliers.
- *
- * Use of this software for evaluation purposes is subject to and indicates
- * acceptance of the End User licence Agreement for this product. A copy of
- * the license is included with this software and is also available at www.havok.com/tryhavok.
- *
- */