Particle Generator

A generator will spawn particles at the given rate until either the diration has elapsed or the spawn count has been met.

generator properties

• spawn rate
• do_burst_spawn
• duration/count
• *particle properties ranges

could add physics to generator, e.g. for smoke grenade?

Each particle will be spawned with properties that are randomly selected within the generators specified ranges.

particle properties:

• velocity
• direction
• size
• opacity
• colour/texture
• lifetime (can be infinite)
• die_on_collision

additional (optional) particle properties:

• use_physics (must have mass set)
• mass (should be non zero unless the physics engine can handle zero-mass particles)
• shrink rate
• fade rate
• colour/texture transformation?