hkpWind.h
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- /*
- *
- * 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_AIR_PROPERTIES_H
- #define HK_AIR_PROPERTIES_H
- #include <Common/Base/hkBase.h>
- #include <Physics/Dynamics/Entity/hkpRigidBody.h>
- #include <Physics/Collide/Shape/Convex/Box/hkpBoxShape.h>
- #include <Physics/Collide/Shape/Convex/Sphere/hkpSphereShape.h>
- #include <Physics/Collide/Shape/Convex/Triangle/hkpTriangleShape.h>
- #include <Physics/Collide/Shape/Convex/Capsule/hkpCapsuleShape.h>
- #include <Physics/Collide/Shape/Convex/Cylinder/hkpCylinderShape.h>
- #include <Physics/Collide/Shape/Convex/ConvexVertices/hkpConvexVerticesShape.h>
- /// Provides an interface for a vector field (windVector) and useful methods
- /// for applying wind or resistance due to motion to rigid bodies.
- /// Subclasses must implement getWindVector.
- /// In the case where resistance only is required, no wind object need be created
- /// and the static applyResistance method can be called directly.
- /// The default units for the wind vector is Newtons / m^2 / (m/s).
- class hkpWind : public hkReferencedObject
- {
- public:
- /// Obtains the wind vector at position pos.
- /// param windOut the force that should be applied to the centroid
- /// of a surface of unit area perpendicular to the wind.
- virtual void getWindVector( const hkVector4& pos, hkVector4& windOut ) const = 0;
- /// Destructor.
- virtual ~hkpWind() { }
- /// Apply wind to a rigid body.
- /// param obbFactor if nonzero, then treat wind on hkpConvexVerticesShapes as if
- /// they were oriented bounding boxes scaled by obbFactor.
- /// param deltaTime the time step over which the force should be applied.
- void applyWind( hkpRigidBody* rb, hkReal deltaTime, hkReal obbFactor = 0.0f ) const;
-
- /// Apply wind and resistance due to motion to a rigid body.
- /// param resistanceFactor multiple of relative motion experienced as wind.
- /// (A resistanceFactor of r applies r*speed units of force against a unit of flat area.)
- /// param obbFactor if nonzero, then treat wind on hkpConvexVerticesShapes as if
- /// they were oriented bounding boxes scaled by obbFactor.
- /// param deltaTime the time step over which the force should be applied.
- void applyWindAndResistance( hkpRigidBody* body, hkReal deltaTime, hkReal resistanceFactor, hkReal obbFactor = 0.0f ) const;
- /// Apply resistance due to motion to a rigid body.
- /// Since no wind object is involved, this is a static method.
- /// param resistanceFactor multiple of relative motion experienced as wind.
- /// (A resistanceFactor of r applies r*speed units of force against a unit of projected area.)
- /// param obbFactor if nonzero, then treat wind on hkpConvexVerticesShapes as if they were
- /// oriented bounding boxes scaled by obbFactor.
- /// param deltaTime the time step over which the force should be applied.
- static void HK_CALL applyResistance( hkpRigidBody* rb, hkReal deltaTime, hkReal resistanceFactor, hkReal obbFactor = 0.0f );
- private:
- // Implementation class.
- class WindOnShape;
- };
- #endif // HK_AIR_PROPERTIES_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.
- *
- */