init(position:velocity:size:color:lifetime:)

Declaration

init(position: SIMD3<Float>, velocity: SIMD3<Float> = .zero, size: SIMD2<Float> = .init(0.01, 0.01), color: SIMD4<Float> = .init(1, 1, 1, 1), lifetime: Float = 1.0)

Parameters

• position:

  The initial 3D position in world space coordinates

• velocity:

  The initial velocity vector in world space units per second (defaults to zero)

• size:

  The initial size as width and height in world space units (defaults to 0.01 x 0.01)

• color:

  The initial RGBA color (defaults to opaque white)

• lifetime:

  The particle lifetime in seconds (defaults to 1.0 second)

Example

// Create a particle that starts at the origin, moves upward, is red, and lasts 3 seconds
let params = ElementSpawnParameters(
    position: SIMD3<Float>(0, 0, 0),
    velocity: SIMD3<Float>(0, 2, 0),
    size: SIMD2<Float>(0.05, 0.05),
    color: SIMD4<Float>(1, 0, 0, 1),
    lifetime: 3.0
)