Class that emits particles in a given direction. More...
Public Types | |
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typedef std::tr1::shared_ptr < DirectionalEmitter > | Ptr |
| Shared pointer type referring to DirectionalEmitter objects. | |
Static Public Member Functions | |
| static Ptr | Create (float particlesPerSecond, float particleLifetime) |
| Creates an emitter that emits particles mainly in one direction. | |
Public Member Functions | |
| DirectionalEmitter (float particlesPerSecond, float particleLifetime) | |
| Constructor. | |
| virtual void | Emit (Adder &system, float dt) |
| Emits particles into a particle system. | |
| void | SetParticleVelocity (sf::Vector2f velocity) |
| Sets the initial particle velocity. | |
| sf::Vector2f | GetParticleVelocity () const |
| Returns the initial particle velocity. | |
| void | SetEmissionAngle (float emissionAngle) |
| Sets the particle emission angle. | |
| float | GetEmissionAngle () const |
| Returns the particle emission angle. | |
| void | SetEmissionZone (MovedPtr< Zone > zone) |
| Sets the zone inside which particles are created. | |
| Zone & | GetEmissionZone () |
| Returns the zone inside which particles are created. | |
| const Zone & | GetEmissionZone () const |
| Returns the zone inside which particles are created (const overload). | |
| void | SetEmissionRate (float particlesPerSecond) |
| Sets the particle emission rate. | |
| float | GetEmissionRate () const |
| Returns the particle emission rate. | |
| void | SetParticleScale (sf::Vector2f scale) |
| Sets the initial particle scale. | |
| sf::Vector2f | GetParticleScale () const |
| Returns the initial particle velocity. | |
| void | SetParticleColor (const sf::Color &color) |
| Sets the initial particle color. | |
| const sf::Color & | GetParticleColor () const |
| Returns the initial particle color. | |
| void | SetParticleLifetime (float lifetime) |
| Sets the lifetime (time between emission and death) of the particle. | |
| float | GetParticleLifetime () const |
| Returns the lifetime (time between emission and death) of the particle. | |
Protected Member Functions | |
| unsigned int | ComputeNbParticles (float dt) |
| Helper function for emission: Computes how many particles should be emitted in this frame. | |
| Particle | CreateParticlePrototype () const |
| Creates a prototype of a particle. | |
Class that emits particles in a given direction.
This direction is the initial particle velocity.
| thor::DirectionalEmitter::DirectionalEmitter | ( | float | particlesPerSecond, |
| float | particleLifetime | ||
| ) |
Constructor.
| particlesPerSecond | How many particles are emitted in 1 second. The type is not integral to allow more flexibility (e.g. 0.5 yields one particle every 2 seconds). |
| particleLifetime | How long the particles live until they are removed (in seconds). |
| unsigned int thor::Emitter::ComputeNbParticles | ( | float | dt | ) | [protected, inherited] |
Helper function for emission: Computes how many particles should be emitted in this frame.
Saves the user from calculations, takes care of too short times to emit particles. This function shall be called exactly once each frame.
| dt | Frame time. |
| static Ptr thor::DirectionalEmitter::Create | ( | float | particlesPerSecond, |
| float | particleLifetime | ||
| ) | [static] |
Creates an emitter that emits particles mainly in one direction.
| particlesPerSecond | How many particles are emitted in 1 second. The type is not integral to allow more flexibility (e.g. 0.5 yields one particle every 2 seconds). |
| particleLifetime | How long the particles live until they are removed (in seconds). |
| Particle thor::Emitter::CreateParticlePrototype | ( | ) | const [protected, inherited] |
Creates a prototype of a particle.
Applies the initial particle settings (position, rotation, scale, color, lifetime).
| virtual void thor::DirectionalEmitter::Emit | ( | Adder & | system, |
| float | dt | ||
| ) | [virtual] |
Emits particles into a particle system.
Override this method in your emitter class to implement your own functionality. If your emitter does only emit the particles in a different area, you should have a look at RandomOffset().
| system | Indirection to the particle system that stores the particles. |
| dt | Time interval during which particles are emitted. |
Implements thor::Emitter.
| float thor::DirectionalEmitter::GetEmissionAngle | ( | ) | const |
Returns the particle emission angle.
| float thor::Emitter::GetEmissionRate | ( | ) | const [inherited] |
Returns the particle emission rate.
| Zone& thor::Emitter::GetEmissionZone | ( | ) | [inherited] |
Returns the zone inside which particles are created.
| const Zone& thor::Emitter::GetEmissionZone | ( | ) | const [inherited] |
Returns the zone inside which particles are created (const overload).
| void thor::DirectionalEmitter::SetEmissionAngle | ( | float | emissionAngle | ) |
Sets the particle emission angle.
| emissionAngle | The difference angle of the cone towards which particles are emitted, in degrees. For example, 0 means a straight line and 180 the half space. |
| void thor::Emitter::SetEmissionRate | ( | float | particlesPerSecond | ) | [inherited] |
Sets the particle emission rate.
| particlesPerSecond | How many particles are emitted in 1 second. The type is not integral to allow more flexibility (e.g. 0.5 yields one particle every 2 seconds). |
| void thor::Emitter::SetEmissionZone | ( | MovedPtr< Zone > | zone | ) | [inherited] |
Sets the zone inside which particles are created.
| zone | Movable smart pointer to concrete zone. |
| void thor::DirectionalEmitter::SetParticleVelocity | ( | sf::Vector2f | velocity | ) |
Sets the initial particle velocity.
Note that the emission angle influences the actual direction of particles.