DrawOrder

Types

• enum EmitFlags
• enum TransformAlign

Type members

• static let maxDrawPasses: Int

  Maximum number of draw passes supported.

• class var godotClassName: StringName

Instance members

• var amount: Int32

  The number of particles to emit in one emission cycle. The effective emission rate is (amount * amount_ratio) / lifetime particles per second. Higher values will increase GPU requirements, even if not all particles are visible at a given time or if amountRatio is decreased.

• var amountRatio: Double

  The ratio of particles that should actually be emitted. If set to a value lower than 1.0, this will set the amount of emitted particles throughout the lifetime to amount * amount_ratio. Unlike changing amount, changing amountRatio while emitting does not affect already-emitted particles and doesn’t cause the particle system to restart. amountRatio can be used to create effects that make the number of emitted particles vary over time.

• var collisionBaseSize: Double

  The base diameter for particle collision in meters. If particles appear to sink into the ground when colliding, increase this value. If particles appear to float when colliding, decrease this value. Only effective if collisionMode is ParticleProcessMaterial/CollisionMode/collisionRigid or ParticleProcessMaterial/CollisionMode/collisionHideOnContact.

• var drawOrder: GPUParticles3D.DrawOrder

  Particle draw order. Uses DrawOrder values.

• var drawPass1: Mesh?

  Mesh that is drawn for the first draw pass.

• var drawPass2: Mesh?

  Mesh that is drawn for the second draw pass.

• var drawPass3: Mesh?

  Mesh that is drawn for the third draw pass.

• var drawPass4: Mesh?

  Mesh that is drawn for the fourth draw pass.

• var drawPasses: Int32

  The number of draw passes when rendering particles.

• var drawSkin: Skin?
• var emitting: Bool

  If true, particles are being emitted. emitting can be used to start and stop particles from emitting. However, if oneShot is true setting emitting to true will not restart the emission cycle unless all active particles have finished processing. Use the [signal finished] signal to be notified once all active particles finish processing.

• var explosiveness: Double

  Time ratio between each emission. If 0, particles are emitted continuously. If 1, all particles are emitted simultaneously.

• var finished: SimpleSignal

  Emitted when all active particles have finished processing. To immediately emit new particles, call restart.

• var fixedFps: Int32

  The particle system’s frame rate is fixed to a value. For example, changing the value to 2 will make the particles render at 2 frames per second. Note this does not slow down the simulation of the particle system itself.

• var fractDelta: Bool

  If true, results in fractional delta calculation which has a smoother particles display effect.

• var interpToEnd: Double

  Causes all the particles in this node to interpolate towards the end of their lifetime.

• var interpolate: Bool

  Enables particle interpolation, which makes the particle movement smoother when their fixedFps is lower than the screen refresh rate.

• var lifetime: Double

  The amount of time each particle will exist (in seconds). The effective emission rate is (amount * amount_ratio) / lifetime particles per second.

• var localCoords: Bool

  If true, particles use the parent node’s coordinate space (known as local coordinates). This will cause particles to move and rotate along the GPUParticles3D node (and its parents) when it is moved or rotated. If false, particles use global coordinates; they will not move or rotate along the GPUParticles3D node (and its parents) when it is moved or rotated.

• var oneShot: Bool

  If true, only the number of particles equal to amount will be emitted.

• var preprocess: Double

  Amount of time to preprocess the particles before animation starts. Lets you start the animation some time after particles have started emitting.

• var processMaterial: Material?

  Material for processing particles. Can be a ParticleProcessMaterial or a ShaderMaterial.

• var randomness: Double

  Emission randomness ratio.

• var speedScale: Double

  Speed scaling ratio. A value of 0 can be used to pause the particles.

• var subEmitter: NodePath

  Path to another GPUParticles3D node that will be used as a subemitter (see subEmitterMode). Subemitters can be used to achieve effects such as fireworks, sparks on collision, bubbles popping into water drops, and more.

• var trailEnabled: Bool

  If true, enables particle trails using a mesh skinning system. Designed to work with RibbonTrailMesh and TubeTrailMesh.

• var trailLifetime: Double

  The amount of time the particle’s trail should represent (in seconds). Only effective if trailEnabled is true.

• var transformAlign: GPUParticles3D.TransformAlign
• var visibilityAabb: AABB

  The AABB that determines the node’s region which needs to be visible on screen for the particle system to be active. extraCullMargin is added on each of the AABB’s axes. Particle collisions and attraction will only occur within this area.

• func captureAabb() -> AABB

  Returns the axis-aligned bounding box that contains all the particles that are active in the current frame.

• func convertFromParticles(Node?)

  Sets this node’s properties to match a given CPUParticles3D node.

• func emitParticle(xform: Transform3D, velocity: Vector3, color: Color, custom: Color, flags: UInt32)

  Emits a single particle. Whether xform, velocity, color and custom are applied depends on the value of flags. See EmitFlags.

• func restart()

  Restarts the particle emission cycle, clearing existing particles. To avoid particles vanishing from the viewport, wait for the [signal finished] signal before calling.