OGRE  1.12.4
Object-Oriented Graphics Rendering Engine
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...
 
ParamDictionarygetParamDictionary (void)
 Retrieves the parameter dictionary for this class. More...
 
const ParamDictionarygetParamDictionary (void) const
 
String getParameter (const String &name) const
 Generic parameter retrieval method. More...
 
const ParameterListgetParameters (void) const
 Retrieves a list of parameters valid for this object. More...
 
const StringgetType (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

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

◆ 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
faA 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
pParticlePointer 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
nameThe name of the parameter to set
valueString 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
paramListName/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
nameThe 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
destPointer 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

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