OptionalangularHow fast the particle is turning, as the behavior that turns it last left it: a rate in radians per second for a particle that rotates by an angle, or one simulation step's turn for one that rotates by quaternion.
Written by the turning behaviors and read by the renderer, which draws between simulation steps and has no other way to continue the turn.
Color of the particle.
OptionalemissionEmission state of the particle.
Life duration of the particle.
the memory of the particle.
OptionalparentParent matrix for transformation.
Position of the particle.
OptionalpreviousWhere the particle was when the current simulation step began, when the implementation keeps it. A renderer draws between fixed steps and uses this to continue the motion the last step produced, whatever produced it.
OptionalpreviousVelocity at the start of the current step, when the implementation keeps it. A stretched billboard is drawn from its velocity, so a renderer needs this to keep the sprite's shape moving between steps as its position does.
OptionalrotationRotation of the particle.
Size of the particle.
Speed modifier of the particle.
Initial color of the particle.
Initial size of the particle.
Initial speed of the particle.
UV tile index.
Velocity of the particle.
Age of the particle.