ReadonlyfacingFacing (> 0 front side, < 0 back side while flipping).
ReadonlyfillFill Style for the Current Side and Age (color, gradient or back color).
ReadonlyheightBox Height in Local Pixels.
ReadonlyprogressLife Progress (0 = just spawned, 1 = about to die).
ReadonlystrokeStroke Color (null when stroke is off).
ReadonlystrokeStroke Width in Local Pixels.
ReadonlywidthBox Width in Local Pixels.
Particle View Passed to a Custom
draw()Function. The context is already translated, rotated, flipped, skewed, scaled and faded; draw centered at0, 0inside awidth × heightbox. The object is reused between calls — read it, don't keep it.