: number Maximum number of simultaneously rendered particles.
?: [number, number] Minimum and maximum lifetime of a particle in seconds.
?: [number, number] Minimum and maximum speed of a particle in pixels per second.
?: [Vec2, Vec2] Minimum and maximum acceleration of a particle in pixels per second^2.
?: [number, number] Minimum and maximum damping of a particle.
?: [number, number] Minimum and maximum start angle of a particle.
?: [number, number] Minimum and maximum angular velocity of a particle.
?: number[] Scale from start to end for a particle.
?: Color[] Colors from start to end for a particle.
?: number[] Opacity from start to end for a particle.
?: Quad[] Quads from start to end for a particle.
: Texture Texture used for the particle.
}