Ogre::LinearForceAffector Class Reference

This class defines a ParticleAffector which applies a linear force to particles in a system. More...

#include <OgreLinearForceAffector.h>

Inheritance diagram for Ogre::LinearForceAffector:

Classes
class	CmdForceApp
	Command object for force application (see ParamCommand). More...
class	CmdForceVector
	Command object for force vector (see ParamCommand). More...

Public Types
enum	ForceApplication { FA_AVERAGE, FA_ADD }
	Choice of how to apply the force vector to particles. More...

Public Member Functions
	LinearForceAffector (ParticleSystem *psys)
	Default constructor. More...
void	_affectParticles (ParticleSystem *pSystem, Real timeElapsed)
	See ParticleAffector. More...
virtual void	_initParticle (Particle *pParticle)
	Method called to allow the affector to initialize all newly created particles in the system. More...
void	copyParametersTo (StringInterface *dest) const
	Method for copying this object's parameters to another object. More...
ForceApplication	getForceApplication (void) const
	Retrieves how the force vector is applied to a particle. More...
Vector3	getForceVector (void) const
	Gets the force vector to apply to the particles in a system. More...
ParamDictionary *	getParamDictionary (void)
	Retrieves the parameter dictionary for this class. More...
const ParamDictionary *	getParamDictionary (void) const
String	getParameter (const String &name) const
	Generic parameter retrieval method. More...
const ParameterList &	getParameters (void) const
	Retrieves a list of parameters valid for this object. More...
const String &	getType (void) const
	Returns the name of the type of affector. More...
void	setForceApplication (ForceApplication fa)
	Sets how the force vector is applied to a particle. More...
void	setForceVector (const Vector3 &force)
	Sets the force vector to apply to the particles in a system. More...
bool	setParameter (const String &name, const String &value)
	Generic parameter setting method. More...
void	setParameterList (const NameValuePairList &paramList)
	Generic multiple parameter setting method. More...

Static Public Member Functions
static void	cleanupDictionary ()
	Cleans up the static 'msDictionary' required to reset Ogre, otherwise the containers are left with invalid pointers, which will lead to a crash as soon as one of the ResourceManager implementers (e.g. More...

Static Public Attributes
static CmdForceApp	msForceAppCmd
static CmdForceVector	msForceVectorCmd
	Command objects. More...

Detailed Description

This class defines a ParticleAffector which applies a linear force to particles in a system.

Remarks

This affector (see ParticleAffector) applies a linear force, such as gravity, to a particle system. This force can be applied in 2 ways: by taking the average of the particle's current momentum and the force vector, or by adding the force vector to the current particle's momentum.

The former approach is self-stabilising i.e. once a particle's momentum is equal to the force vector, no further change is made to it's momentum. It also results in a non-linear acceleration of particles. The latter approach is simpler and applies a constant acceleration to particles. However, it is not self-stabilising and can lead to perpetually increasing particle velocities. You choose the approach by calling the setForceApplication method.

Member Enumeration Documentation

ForceApplication

enum Ogre::LinearForceAffector::ForceApplication

Choice of how to apply the force vector to particles.

Enumerator
FA_AVERAGE	Take the average of the force vector and the particle momentum.
FA_ADD	Add the force vector to the particle momentum.

Constructor & Destructor Documentation

LinearForceAffector()

Ogre::LinearForceAffector::LinearForceAffector

(

ParticleSystem *

psys

)

Default constructor.

Member Function Documentation

_affectParticles()

void Ogre::LinearForceAffector::_affectParticles ( ParticleSystem *  pSystem, Real  timeElapsed  )

virtual

See ParticleAffector.

Implements Ogre::ParticleAffector.

setForceVector()

void Ogre::LinearForceAffector::setForceVector

(

const Vector3 &

force

)

Sets the force vector to apply to the particles in a system.

getForceVector()

Vector3 Ogre::LinearForceAffector::getForceVector

(

void

)

const

Gets the force vector to apply to the particles in a system.

setForceApplication()

void Ogre::LinearForceAffector::setForceApplication

(

ForceApplication

fa

)

Sets how the force vector is applied to a particle.

Remarks

The default is FA_ADD.

Parameters

fa	A member of the ForceApplication enum.

getForceApplication()

ForceApplication Ogre::LinearForceAffector::getForceApplication

(

void

)

const

Retrieves how the force vector is applied to a particle.

Returns

A member of the ForceApplication enum.

_initParticle()

virtual void Ogre::ParticleAffector::_initParticle ( Particle *  pParticle )

inlinevirtualinherited

Method called to allow the affector to initialize all newly created particles in the system.

Remarks

This is where the affector gets the chance to initialize it's effects to the particles of a system. The affector is expected to initialize some or all of the particles in the system passed to it, depending on the affector's approach.

Parameters

pParticle

Pointer to a Particle to initialize.

Reimplemented in Ogre::RotationAffector, and Ogre::ColourImageAffector.

getType()

const String& Ogre::ParticleAffector::getType ( void  ) const

inlineinherited

Returns the name of the type of affector.

Remarks

This property is useful for determining the type of affector procedurally so another can be created.

getParamDictionary() [1/2]

ParamDictionary* Ogre::StringInterface::getParamDictionary ( void  )

inlineinherited

Retrieves the parameter dictionary for this class.

Remarks

Only valid to call this after createParamDictionary.

Returns

Pointer to ParamDictionary shared by all instances of this class which you can add parameters to, retrieve parameters etc.

getParamDictionary() [2/2]

const ParamDictionary* Ogre::StringInterface::getParamDictionary ( void  ) const

inlineinherited

getParameters()

const ParameterList& Ogre::StringInterface::getParameters ( void  ) const

inherited

Retrieves a list of parameters valid for this object.

Returns

A reference to a static list of ParameterDef objects.

setParameter()

bool Ogre::StringInterface::setParameter ( const String &  name, const String &  value  )

inherited

Generic parameter setting method.

Remarks

Call this method with the name of a parameter and a string version of the value to set. The implementor will convert the string to a native type internally. If in doubt, check the parameter definition in the list returned from StringInterface::getParameters.

Parameters

name	The name of the parameter to set
value	String value. Must be in the right format for the type specified in the parameter definition. See the StringConverter class for more information.

Returns

true if set was successful, false otherwise (NB no exceptions thrown - tolerant method)

Referenced by Ogre::StringInterface::copyParametersTo().

setParameterList()

void Ogre::StringInterface::setParameterList ( const NameValuePairList &  paramList )

inherited

Generic multiple parameter setting method.

Remarks

Call this method with a list of name / value pairs to set. The implementor will convert the string to a native type internally. If in doubt, check the parameter definition in the list returned from StringInterface::getParameters.

Parameters

paramList

Name/value pair list

getParameter()

String Ogre::StringInterface::getParameter ( const String &  name ) const

inlineinherited

Generic parameter retrieval method.

Remarks

Call this method with the name of a parameter to retrieve a string-format value of the parameter in question. If in doubt, check the parameter definition in the list returned from getParameters for the type of this parameter. If you like you can use StringConverter to convert this string back into a native type.

Parameters

name	The name of the parameter to get

Returns

String value of parameter, blank if not found

References Ogre::ParamCommand::doGet().

copyParametersTo()

void Ogre::StringInterface::copyParametersTo ( StringInterface *  dest ) const

inlineinherited

Method for copying this object's parameters to another object.

Remarks

This method takes the values of all the object's parameters and tries to set the same values on the destination object. This provides a completely type independent way to copy parameters to other objects. Note that because of the String manipulation involved, this should not be regarded as an efficient process and should be saved for times outside of the rendering loop.

Any unrecognised parameters will be ignored as with setParameter method.

Parameters

dest	Pointer to object to have it's parameters set the same as this object.

References Ogre::StringInterface::setParameter().

cleanupDictionary()

static void Ogre::StringInterface::cleanupDictionary ( )

staticinherited

Cleans up the static 'msDictionary' required to reset Ogre, otherwise the containers are left with invalid pointers, which will lead to a crash as soon as one of the ResourceManager implementers (e.g.

MaterialManager) initializes.

Member Data Documentation

msForceVectorCmd

CmdForceVector Ogre::LinearForceAffector::msForceVectorCmd

static

Command objects.

msForceAppCmd

CmdForceApp Ogre::LinearForceAffector::msForceAppCmd

static

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The documentation for this class was generated from the following file:

• OgreLinearForceAffector.h