The color of the particle when it dies.
The scale of the particle when it dies.
The image to use for the particle.
The dimensions, width by height, to scale the particle image in pixels.
The life of the particle in seconds.
The mass of the particle in kilograms.
Gets the age normalized to a value in the range [0.0, 1.0].
The positon of the particle in world coordinates.
The color of the particle when it is born.
the scale of the particle when it is born.
The velocity of the particle in world coordinates.
Gets the age of the particle in seconds.