Modifiers are behaviors that are performed on particles every frame.
Parme has the following modifiers built in:
- Animating Texture - This causes the particle to progress from the first texture section to the last throughout its lifetime, allowing for the particles to be animated. This will cause a linear time progression between all the sections, with the particle starting with the first texture section and hitting the last texture shortly before the end of its lifetime.
- Constant Acceleration - This modifies the particle’s velocity by the specified
XandYamounts every second - Constant Size - This modifies the particle’s height and width based on the specified amount every second.
- Drag - Adds drag to the particle
- Ending Color Multiplier - This is the color multiplier that the particle should be at at the end of its lifetime. This will cause a linear interpolation between the starting color multiplier to the end based on the particle’s lifetime.
In addition to normal modifiers, there is a special purpose modifier called a Position Modifier. These modifiers override the default position logic of a particle for custom functionality. The current position modifiers that are built in are:
- Altitude bounce modifier - This causes the particle to bounce in the positive Y axis (even when rotated). The particle will bounce when it hits the same Y coordinate that the particle would be at if there was no bounce effect in play.