|A grid texture contains an animation frame for particle playback.
|The number of animation frames in the x direction.
|The number of animation frames in the y direction.
|WholeSheet plays all the frames in the texture, singleRow only plays one row.
|The frame of animation playing in a cycle and the curve of time change.
|Play from the first few frames, the time is the life cycle of the entire particle system.
|The number of playback cycles in a life cycle.