Particle Forces

OrangePekoeOrangePekoe Website User Posts: 478
In the preview of the HitFilm 1.1 Update showing particle forces, how do you go about applying secondary forces to a given set of particles?
For example in this video
The particles explode from the center, drop to the ground and then certain ones start "attracting" and then all of them explode away from the center at the end. Do the particles need to still be in motion for a secondary force to work? If they are not moving due to a friction value of 100% and then set to 0% as well as a secondary force applied they don't seem to move? Any thoughts?


  • SimonKJonesSimonKJones Moderator Website User, HitFilm Beta Tester Posts: 4,450 Enthusiast
    You can add as many forces as you want to a particle sim. Forces can be in a specific cuboid shape area, or global (which means 'everywhere'). Whenever particles are inside the force's field of influence, they will be affected (assuming the Force's strength isn't at zero).
    For that video that posted, I set up a few cuboid attractors, which is what keeps the particles whizzing around the specific areas. The big sweep at the end is caused by a large detractor cuboid which starts off at the far left, out of shot, and is then animated to move to the right, pushing all the particles out of the way.
    Particles don't need to be moving for forces to work. You could have particles all sitting on a deflector, then move force onto them and they'd react.
    Let me know if you've got any other questions!
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