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// Automatically generated - do not modify!
@file:Suppress(
"NON_EXTERNAL_DECLARATION_IN_INAPPROPRIATE_FILE",
)
package cesium
/**
* A ParticleSystem manages the updating and display of a collection of particles.
* @see Online Documentation
*/
@JsName("\$cesium__ParticleSystem")
external class ParticleSystem(options: ConstructorOptions? = definedExternally) {
/**
* @property [show] Whether to display the particle system.
* Default value - `true`
* @property [updateCallback] The callback function to be called each frame to update a particle.
* @property [emitter] The particle emitter for this system.
* Default value - [CircleEmitter(0.5)][CircleEmitter]
* @property [modelMatrix] The 4x4 transformation matrix that transforms the particle system from model to world coordinates.
* Default value - [Matrix4.IDENTITY]
* @property [emitterModelMatrix] The 4x4 transformation matrix that transforms the particle system emitter within the particle systems local coordinate system.
* Default value - [Matrix4.IDENTITY]
* @property [emissionRate] The number of particles to emit per second.
* Default value - `5`
* @property [bursts] An array of [ParticleBurst], emitting bursts of particles at periodic times.
* @property [loop] Whether the particle system should loop its bursts when it is complete.
* Default value - `true`
* @property [scale] Sets the scale to apply to the image of the particle for the duration of its particleLife.
* Default value - `1.0`
* @property [startScale] The initial scale to apply to the image of the particle at the beginning of its life.
* @property [endScale] The final scale to apply to the image of the particle at the end of its life.
* @property [color] Sets the color of a particle for the duration of its particleLife.
* Default value - [Color.WHITE]
* @property [startColor] The color of the particle at the beginning of its life.
* @property [endColor] The color of the particle at the end of its life.
* @property [image] The URI, HTMLImageElement, or HTMLCanvasElement to use for the billboard.
* @property [imageSize] If set, overrides the minimumImageSize and maximumImageSize inputs that scale the particle image's dimensions in pixels.
* Default value - [Cartesian2(1.0, 1.0)][Cartesian2]
* @property [minimumImageSize] Sets the minimum bound, width by height, above which to randomly scale the particle image's dimensions in pixels.
* @property [maximumImageSize] Sets the maximum bound, width by height, below which to randomly scale the particle image's dimensions in pixels.
* @property [sizeInMeters] Sets if the size of particles is in meters or pixels. `true` to size the particles in meters; otherwise, the size is in pixels.
* @property [speed] If set, overrides the minimumSpeed and maximumSpeed inputs with this value.
* Default value - `1.0`
* @property [minimumSpeed] Sets the minimum bound in meters per second above which a particle's actual speed will be randomly chosen.
* @property [maximumSpeed] Sets the maximum bound in meters per second below which a particle's actual speed will be randomly chosen.
* @property [lifetime] How long the particle system will emit particles, in seconds.
* Default value - [Number.MAX_VALUE]
* @property [particleLife] If set, overrides the minimumParticleLife and maximumParticleLife inputs with this value.
* Default value - `5.0`
* @property [minimumParticleLife] Sets the minimum bound in seconds for the possible duration of a particle's life above which a particle's actual life will be randomly chosen.
* @property [maximumParticleLife] Sets the maximum bound in seconds for the possible duration of a particle's life below which a particle's actual life will be randomly chosen.
* @property [mass] Sets the minimum and maximum mass of particles in kilograms.
* Default value - `1.0`
* @property [minimumMass] Sets the minimum bound for the mass of a particle in kilograms. A particle's actual mass will be chosen as a random amount above this value.
* @property [maximumMass] Sets the maximum mass of particles in kilograms. A particle's actual mass will be chosen as a random amount below this value.
*/
interface ConstructorOptions {
var show: Boolean?
var updateCallback: UpdateCallback?
var emitter: ParticleEmitter?
var modelMatrix: Matrix4?
var emitterModelMatrix: Matrix4?
var emissionRate: Int?
var bursts: Array?
var loop: Boolean?
var scale: Double?
var startScale: Double?
var endScale: Double?
var color: Color?
var startColor: Color?
var endColor: Color?
var image: Any?
var imageSize: Cartesian2?
var minimumImageSize: Cartesian2?
var maximumImageSize: Cartesian2?
var sizeInMeters: Boolean?
var speed: Double?
var minimumSpeed: Double?
var maximumSpeed: Double?
var lifetime: Double?
var particleLife: Double?
var minimumParticleLife: Double?
var maximumParticleLife: Double?
var mass: Double?
var minimumMass: Double?
var maximumMass: Double?
}
/**
* Whether to display the particle system.
* @see Online Documentation
*/
var show: Boolean
/**
* An array of force callbacks. The callback is passed a [Particle] and the difference from the last time
* @see Online Documentation
*/
var updateCallback: UpdateCallback
/**
* Whether the particle system should loop it's bursts when it is complete.
* @see Online Documentation
*/
var loop: Boolean
/**
* The URI, HTMLImageElement, or HTMLCanvasElement to use for the billboard.
* @see Online Documentation
*/
var image: Any
/**
* The particle emitter for this
* @see Online Documentation
*/
var emitter: ParticleEmitter
/**
* An array of [ParticleBurst], emitting bursts of particles at periodic times.
* @see Online Documentation
*/
var bursts: Array
/**
* The 4x4 transformation matrix that transforms the particle system from model to world coordinates.
* @see Online Documentation
*/
var modelMatrix: Matrix4
/**
* The 4x4 transformation matrix that transforms the particle system emitter within the particle systems local coordinate system.
* @see Online Documentation
*/
var emitterModelMatrix: Matrix4
/**
* The color of the particle at the beginning of its life.
* @see Online Documentation
*/
var startColor: Color
/**
* The color of the particle at the end of its life.
* @see Online Documentation
*/
var endColor: Color
/**
* The initial scale to apply to the image of the particle at the beginning of its life.
* @see Online Documentation
*/
var startScale: Double
/**
* The final scale to apply to the image of the particle at the end of its life.
* @see Online Documentation
*/
var endScale: Double
/**
* The number of particles to emit per second.
* @see Online Documentation
*/
var emissionRate: Int
/**
* Sets the minimum bound in meters per second above which a particle's actual speed will be randomly chosen.
* @see Online Documentation
*/
var minimumSpeed: Double
/**
* Sets the maximum bound in meters per second below which a particle's actual speed will be randomly chosen.
* @see Online Documentation
*/
var maximumSpeed: Double
/**
* Sets the minimum bound in seconds for the possible duration of a particle's life above which a particle's actual life will be randomly chosen.
* @see Online Documentation
*/
var minimumParticleLife: Double
/**
* Sets the maximum bound in seconds for the possible duration of a particle's life below which a particle's actual life will be randomly chosen.
* @see Online Documentation
*/
var maximumParticleLife: Double
/**
* Sets the minimum mass of particles in kilograms.
* @see Online Documentation
*/
var minimumMass: Double
/**
* Sets the maximum mass of particles in kilograms.
* @see Online Documentation
*/
var maximumMass: Double
/**
* Sets the minimum bound, width by height, above which to randomly scale the particle image's dimensions in pixels.
* @see Online Documentation
*/
var minimumImageSize: Cartesian2
/**
* Sets the maximum bound, width by height, below which to randomly scale the particle image's dimensions in pixels.
* @see Online Documentation
*/
var maximumImageSize: Cartesian2
/**
* Gets or sets if the particle size is in meters or pixels. `true` to size particles in meters; otherwise, the size is in pixels.
* @see Online Documentation
*/
var sizeInMeters: Boolean
/**
* How long the particle system will emit particles, in seconds.
* @see Online Documentation
*/
var lifetime: Double
/**
* Fires an event when the particle system has reached the end of its lifetime.
* @see Online Documentation
*/
var complete: Event
/**
* When `true`, the particle system has reached the end of its lifetime; `false` otherwise.
* @see Online Documentation
*/
var isComplete: Boolean
/**
* Returns true if this object was destroyed; otherwise, false.
*
* If this object was destroyed, it should not be used; calling any function other than
* `isDestroyed` will result in a [DeveloperError] exception.
* @return `true` if this object was destroyed; otherwise, `false`.
* @see Online Documentation
*/
fun isDestroyed(): Boolean
/**
* Destroys the WebGL resources held by this object. Destroying an object allows for deterministic
* release of WebGL resources, instead of relying on the garbage collector to destroy this object.
*
* Once an object is destroyed, it should not be used; calling any function other than
* `isDestroyed` will result in a [DeveloperError] exception. Therefore,
* assign the return value (`undefined`) to the object as done in the example.
* @see Online Documentation
*/
fun destroy()
}
/**
* A function used to modify attributes of the particle at each time step. This can include force modifications,
* color, sizing, etc.
* ```
* function applyGravity(particle, dt) {
* var position = particle.position;
* var gravityVector = Cartesian3.normalize(position, new Cartesian3());
* Cartesian3.multiplyByScalar(gravityVector, GRAVITATIONAL_CONSTANT * dt, gravityVector);
* particle.velocity = Cartesian3.add(particle.velocity, gravityVector, particle.velocity);
* }
* ```
* @param [particle] The particle being updated.
* @param [dt] The time in seconds since the last update.
* @see Online Documentation
*/
typealias UpdateCallback = (particle: Particle, dt: Double) -> Unit
