2013-11-12 00:10:48 +01:00
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/////////////////////////////////////////////////////////////////////
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// Created by Dan Andersson 2013
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/////////////////////////////////////////////////////////////////////
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#ifndef OYSTER_PHYSICS_3D_FLUID_DRAG_H
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#define OYSTER_PHYSICS_3D_FLUID_DRAG_H
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#include "OysterMath.h"
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2013-11-12 12:33:52 +01:00
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#include "OysterPhysics3D.h"
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2013-11-12 00:10:48 +01:00
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namespace Oyster { namespace Physics3D
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{
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struct FluidDrag
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{ /// A struct representing fluids* interaction with objects.
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/// *including gas
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public:
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FluidDrag( ::Oyster::Math::Float density = 1.0f, ::Oyster::Math::Float coeff = 1.0f );
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FluidDrag & operator = ( const FluidDrag &fluid );
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void SetDensity( ::Oyster::Math::Float d );
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void SetDragCoefficient( ::Oyster::Math::Float c );
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/******************************************************************
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* Returns the resistance force when object is moving through fluid.
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* @param deltaVelocity: (fluid's velocity) - (the object's velocity)
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* @param crossSectionalArea: The max area of crosssectional surfaces orthogonal to deltaVelocity
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* @param targetMem: Allocated memory where result is written. default: temporary allocation
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* @return targetMem
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******************************************************************/
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::Oyster::Math::Float3 & GetDragForce( const ::Oyster::Math::Float3 &deltaVelocity, ::Oyster::Math::Float crossSectionalArea, ::Oyster::Math::Float3 &targetMem = ::Oyster::Math::Float3() ) const;
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/** @todo TODO: Add GetMagnusForce ? */
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private:
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::Oyster::Math::Float density, /// density of the fluid (kg/m^3)
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dragCoeff;
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};
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} }
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#endif
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