OGRE  2.0
Object-Oriented Graphics Rendering Engine
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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:
+ Collaboration 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...
 
virtual 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
 
virtual 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 operator delete (void *ptr)
 
void operator delete (void *ptr, void *)
 
void operator delete (void *ptr, const char *, int, const char *)
 
void operator delete[] (void *ptr)
 
void operator delete[] (void *ptr, const char *, int, const char *)
 
void * operator new (size_t sz, const char *file, int line, const char *func)
 operator new, with debug line info More...
 
void * operator new (size_t sz)
 
void * operator new (size_t sz, void *ptr)
 placement operator new More...
 
void * operator new[] (size_t sz, const char *file, int line, const char *func)
 array operator new, with debug line info More...
 
void * operator new[] (size_t sz)
 
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...
 
virtual bool setParameter (const String &name, const String &value)
 Generic parameter setting method. More...
 
virtual 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...
 

Protected Member Functions

void addBaseParameters (void)
 Internal method for setting up the basic parameter definitions for a subclass. More...
 
bool createParamDictionary (const String &className)
 Internal method for creating a parameter dictionary for the class, if it does not already exist. More...
 

Protected Attributes

ForceApplication mForceApplication
 How to apply force. More...
 
Vector3 mForceVector
 Force vector. More...
 
ParticleSystemmParent
 
String mType
 Name of the type of affector, MUST be initialised by subclasses. 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.

Definition at line 51 of file OgreLinearForceAffector.h.

Member Enumeration Documentation

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.

Definition at line 70 of file OgreLinearForceAffector.h.

Constructor & Destructor Documentation

Ogre::LinearForceAffector::LinearForceAffector ( ParticleSystem psys)

Default constructor.

Member Function Documentation

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

Definition at line 95 of file OgreParticleAffector.h.

void Ogre::ParticleAffector::addBaseParameters ( void  )
inlineprotectedinherited

Internal method for setting up the basic parameter definitions for a subclass.

Remarks
Because StringInterface holds a dictionary of parameters per class, subclasses need to call this to ask the base class to add it's parameters to their dictionary as well. Can't do this in the constructor because that runs in a non-virtual context.
The subclass must have called it's own createParamDictionary before calling this method.

Definition at line 78 of file OgreParticleAffector.h.

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.

virtual void Ogre::StringInterface::copyParametersTo ( StringInterface dest) const
inlinevirtualinherited

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.

Definition at line 302 of file OgreStringInterface.h.

References Ogre::ParamDictionary::mParamDefs, and Ogre::StringInterface::setParameter().

bool Ogre::StringInterface::createParamDictionary ( const String className)
inlineprotectedinherited

Internal method for creating a parameter dictionary for the class, if it does not already exist.

Remarks
This method will check to see if a parameter dictionary exist for this class yet, and if not will create one. NB you must supply the name of the class (RTTI is not used or performance).
Parameters
classNamethe name of the class using the dictionary
Returns
true if a new dictionary was created, false if it was already there

Definition at line 185 of file OgreStringInterface.h.

References OGRE_LOCK_MUTEX.

ForceApplication Ogre::LinearForceAffector::getForceApplication ( void  ) const

Retrieves how the force vector is applied to a particle.

Returns
A member of the ForceApplication enum.
Vector3 Ogre::LinearForceAffector::getForceVector ( void  ) const

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

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.

Definition at line 218 of file OgreStringInterface.h.

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

Definition at line 223 of file OgreStringInterface.h.

virtual String Ogre::StringInterface::getParameter ( const String name) const
inlinevirtualinherited

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

Definition at line 271 of file OgreStringInterface.h.

References Ogre::ParamCommand::doGet(), and Ogre::ParamDictionary::getParamCommand().

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.
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.

Definition at line 118 of file OgreParticleAffector.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr)
inlineinherited

Definition at line 96 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr,
void *   
)
inlineinherited

Definition at line 102 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr,
const char *  ,
int  ,
const char *   
)
inlineinherited

Definition at line 108 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete[] ( void *  ptr)
inlineinherited

Definition at line 113 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete[] ( void *  ptr,
const char *  ,
int  ,
const char *   
)
inlineinherited

Definition at line 119 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz,
const char *  file,
int  line,
const char *  func 
)
inlineinherited

operator new, with debug line info

Definition at line 68 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz)
inlineinherited

Definition at line 73 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz,
void *  ptr 
)
inlineinherited

placement operator new

Definition at line 79 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz,
const char *  file,
int  line,
const char *  func 
)
inlineinherited

array operator new, with debug line info

Definition at line 86 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz)
inlineinherited

Definition at line 91 of file OgreMemoryAllocatedObject.h.

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.
void Ogre::LinearForceAffector::setForceVector ( const Vector3 force)

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

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

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().

virtual void Ogre::StringInterface::setParameterList ( const NameValuePairList paramList)
virtualinherited

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

Member Data Documentation

ForceApplication Ogre::LinearForceAffector::mForceApplication
protected

How to apply force.

Definition at line 111 of file OgreLinearForceAffector.h.

Vector3 Ogre::LinearForceAffector::mForceVector
protected

Force vector.

Definition at line 108 of file OgreLinearForceAffector.h.

ParticleSystem* Ogre::ParticleAffector::mParent
protectedinherited

Definition at line 80 of file OgreParticleAffector.h.

CmdForceApp Ogre::LinearForceAffector::msForceAppCmd
static

Definition at line 104 of file OgreLinearForceAffector.h.

CmdForceVector Ogre::LinearForceAffector::msForceVectorCmd
static

Command objects.

Definition at line 103 of file OgreLinearForceAffector.h.

String Ogre::ParticleAffector::mType
protectedinherited

Name of the type of affector, MUST be initialised by subclasses.

Definition at line 68 of file OgreParticleAffector.h.


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