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Public Types |
enum | { INVALID_INDEX = -1
} |
enum | Shape {
POINT,
QUAD,
QUAD_TRIANGLESTRIP,
HEXAGON,
LINE
} |
| Shape of particles. More...
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Public Member Functions |
| Particle () |
Shape | getShape () const |
| Get the shape of the particle.
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void | setShape (Shape s) |
| Set the shape of the particle.
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bool | isAlive () const |
| Get whether the particle is still alive.
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double | getLifeTime () const |
| Get the life time of the particle (in seconds).
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double | getAge () const |
| Get the age of the particle (in seconds).
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const rangef & | getSizeRange () const |
| Get the minimum and maximum values for polygon size.
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const rangef & | getAlphaRange () const |
| Get the minimum and maximum values for alpha.
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const rangev4 & | getColorRange () const |
| Get the minimum and maximum values for color.
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const Interpolator * | getSizeInterpolator () const |
| Get the interpolator for computing the size of polygons.
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const Interpolator * | getAlphaInterpolator () const |
| Get the interpolator for computing alpha values.
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const Interpolator * | getColorInterpolator () const |
| Get the interpolator for computing color values.
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float | getRadius () const |
| Get the physical radius of the particle.
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float | getMass () const |
| Get the mass of the particle.
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float | getMassInv () const |
| Get 1 / getMass() .
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const osg::Vec3 & | getPosition () const |
| Get the position vector.
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const osg::Vec3 & | getVelocity () const |
| Get the velocity vector.
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const osg::Vec3 & | getPreviousPosition () const |
| Get the previous position (the position before last update).
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const osg::Vec3 & | getAngle () const |
| Get the angle vector.
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const osg::Vec3 & | getAngularVelocity () const |
| Get the rotational velocity vector.
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const osg::Vec3 & | getPreviousAngle () const |
| Get the previous angle vector.
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const osg::Vec4 & | getCurrentColor () const |
| Get the current color.
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float | getCurrentAlpha () const |
| Get the current alpha.
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const float | getSTexCoord () const |
| Get the s texture coordinate of the bottom left of the particle.
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float | getTCoord () const |
| Get the t texture coordinate of the bottom left of the particle.
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void | kill () |
| Kill the particle on next update NOTE: after calling this function, the isAlive() method will still return true until the particle is updated again.
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void | setLifeTime (double t) |
| Set the life time of the particle.
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void | setSizeRange (const rangef &r) |
| Set the minimum and maximum values for polygon size.
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void | setAlphaRange (const rangef &r) |
| Set the minimum and maximum values for alpha.
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void | setColorRange (const rangev4 &r) |
| Set the minimum and maximum values for color.
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void | setSizeInterpolator (Interpolator *ri) |
| Set the interpolator for computing size values.
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void | setAlphaInterpolator (Interpolator *ai) |
| Set the interpolator for computing alpha values.
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void | setColorInterpolator (Interpolator *ci) |
| Set the interpolator for computing color values.
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void | setRadius (float r) |
| Set the physical radius of the particle.
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void | setMass (float m) |
| Set the mass of the particle.
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void | setPosition (const osg::Vec3 &p) |
| Set the position vector.
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void | setVelocity (const osg::Vec3 &v) |
| Set the velocity vector.
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void | addVelocity (const osg::Vec3 &dv) |
| Add a vector to the velocity vector.
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void | transformPositionVelocity (const osg::Matrix &xform) |
| Transform position and velocity vectors by a matrix.
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void | transformPositionVelocity (const osg::Matrix &xform1, const osg::Matrix &xform2, float r) |
| Transform position and velocity vectors by a combination of two matrices.
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void | setAngle (const osg::Vec3 &a) |
| Set the angle vector.
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void | setAngularVelocity (const osg::Vec3 &v) |
| Set the angular velocity vector.
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void | addAngularVelocity (const osg::Vec3 &dv) |
| Add a vector to the angular velocity vector.
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void | transformAngleVelocity (const osg::Matrix &xform) |
| Transform angle and angularVelocity vectors by a matrix.
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bool | update (double dt) |
| Update the particle (don't call this method manually).
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void | beginRender () const |
| Perform some pre-rendering tasks. Called automatically by particle systems.
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void | render (const osg::Vec3 &xpos, const osg::Vec3 &px, const osg::Vec3 &py, float scale=1.0f) const |
| Render the particle. Called automatically by particle systems.
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void | endRender () const |
| Perform some post-rendering tasks. Called automatically by particle systems.
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float | getCurrentSize () const |
| Get the current (interpolated) polygon size. Valid only after the first call to update().
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void | setTextureTile (int sTile, int tTile, int numTiles=0) |
| Specify how the particle texture is tiled.
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void | setPreviousParticle (int previous) |
| Set the previous particle.
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int | getPreviousParticle () const |
| Get the previous particle.
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void | setNextParticle (int next) |
| Set the next particle.
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int | getNextParticle () const |
| Get the const next particle.
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void | setUpTexCoordsAsPartOfConnectedParticleSystem (ParticleSystem *ps) |
| Method for initializing a particles texture coords as part of a connected particle system.
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Protected Attributes |
Shape | _shape |
rangef | _sr |
rangef | _ar |
rangev4 | _cr |
osg::ref_ptr< Interpolator > | _si |
osg::ref_ptr< Interpolator > | _ai |
osg::ref_ptr< Interpolator > | _ci |
bool | _alive |
bool | _mustdie |
double | _lifeTime |
float | _radius |
float | _mass |
float | _massinv |
osg::Vec3 | _prev_pos |
osg::Vec3 | _position |
osg::Vec3 | _velocity |
osg::Vec3 | _prev_angle |
osg::Vec3 | _angle |
osg::Vec3 | _angul_arvel |
double | _t0 |
float | _current_size |
float | _current_alpha |
osg::Vec4 | _current_color |
float | _s_tile |
float | _t_tile |
int | _num_tile |
int | _cur_tile |
float | _s_coord |
float | _t_coord |
int | _previousParticle |
int | _nextParticle |
Objects of this class are particles, they have some graphical properties and some physical properties. Particles are created by emitters and then placed into Particle Systems, where they live and get updated at each frame. Particles can either live forever (lifeTime < 0), or die after a specified time (lifeTime >= 0). For each property which is defined as a range of values, a "current" value will be evaluated at each frame by interpolating the min and max values so that curr_value = min when t == 0, and curr_value = max when t == lifeTime. You may customize the interpolator objects to achieve any kind of transition. If you want the particle to live forever, set its lifetime to any value <= 0; in that case, no interpolation is done to compute real-time properties, and only minimum values are used.