115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
|
||
*
|
||
* This library is open source and may be redistributed and/or modified under
|
||
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
||
* (at your option) any later version. The full license is in LICENSE file
|
||
* included with this distribution, and on the openscenegraph.org website.
|
||
*
|
||
* This library 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
|
||
* OpenSceneGraph Public License for more details.
|
||
*/
|
||
|
||
#ifndef OSGPARTICLE_FLUIDPROGRAM_
|
||
#define OSGPARTICLE_FLUIDPROGRAM_ 1
|
||
|
||
#include <osgParticle/Export>
|
||
#include <osgParticle/Program>
|
||
|
||
#include <osg/CopyOp>
|
||
#include <osg/Object>
|
||
#include <osg/Node>
|
||
#include <osg/NodeVisitor>
|
||
|
||
namespace osgParticle
|
||
{
|
||
|
||
/** A program class for performing operations on particles using a sequence of <I>operators</I>.
|
||
To use a <CODE>FluidProgram</CODE> you have to create some <CODE>Operator</CODE> objects and
|
||
add them to the program.
|
||
All operators will be applied to each particle in the same order they've been added to the program.
|
||
*/
|
||
class OSGPARTICLE_EXPORT FluidProgram: public Program {
|
||
public:
|
||
FluidProgram();
|
||
FluidProgram(const FluidProgram& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);
|
||
|
||
META_Node(osgParticle,FluidProgram);
|
||
|
||
/// Set the viscosity of the fluid.
|
||
inline void setFluidViscosity(float v)
|
||
{
|
||
_viscosity = v;
|
||
_viscosityCoefficient = 6 * osg::PI * _viscosity;
|
||
}
|
||
|
||
/// Get the viscosity of the fluid.
|
||
inline float getFluidViscosity() const { return _viscosity; }
|
||
|
||
/// Set the density of the fluid.
|
||
inline void setFluidDensity(float d)
|
||
{
|
||
_density = d;
|
||
_densityCoefficeint = 0.2f * osg::PI * _density;
|
||
}
|
||
|
||
/// Get the density of the fluid.
|
||
inline float getFluidDensity() const { return _density; }
|
||
|
||
|
||
/// Set the wind vector.
|
||
inline void setWind(const osg::Vec3& wind) { _wind = wind; }
|
||
|
||
/// Get the wind vector.
|
||
inline const osg::Vec3& getWind() const { return _wind; }
|
||
|
||
/// Set the acceleration vector.
|
||
inline void setAcceleration(const osg::Vec3& v) { _acceleration = v; }
|
||
|
||
/// Get the acceleration vector.
|
||
inline const osg::Vec3& getAcceleration() const { return _acceleration; }
|
||
|
||
/** Set the acceleration vector to the gravity on earth (0, 0, -9.81).
|
||
The acceleration will be multiplied by the <CODE>scale</CODE> parameter.
|
||
*/
|
||
inline void setToGravity(float scale = 1.0f) { _acceleration.set(0, 0, -9.81f*scale); }
|
||
|
||
/// Set the fluid parameters as for air (20<32>C temperature).
|
||
inline void setFluidToAir()
|
||
{
|
||
setToGravity(1.0f);
|
||
setFluidDensity(1.2929f);
|
||
setFluidViscosity(1.8e-5f);
|
||
}
|
||
|
||
/// Set the fluid parameters as for pure water (20<32>C temperature).
|
||
inline void setFluidToWater()
|
||
{
|
||
setToGravity(1.0f);
|
||
setFluidDensity(1.0f);
|
||
setFluidViscosity(1.002e-3f);
|
||
}
|
||
|
||
|
||
protected:
|
||
|
||
virtual ~FluidProgram() {}
|
||
FluidProgram& operator=(const FluidProgram&) { return *this; }
|
||
|
||
virtual void execute(double dt);
|
||
|
||
osg::Vec3 _acceleration;
|
||
float _viscosity;
|
||
float _density;
|
||
osg::Vec3 _wind;
|
||
|
||
float _viscosityCoefficient;
|
||
float _densityCoefficeint;
|
||
};
|
||
|
||
|
||
}
|
||
|
||
#endif
|