I’ve been playing around with CC Particle World a lot in the past few days, and I accidentally stumbled upon a setting that I didn’t know existed. I’m very excited about the creative possibilities that this setting suggests, but I thought that I should let you know about it as well – Hold Particle Release
Under the “Extras” property group in CC Particle World, look for a property called “Hold Particle Release”. I find the name somewhat confusing, as a more proper name would be “Delay Particle Release”, but I’m not a technical writer. The value is expressed as a percentage of a particle’s longevity setting. So, for example, if the particle has a longevity of 3 seconds, and the “Hold Particle Release” setting for that particle is 50%, the particle will remain stationary for 1.5 seconds and then begin animating. The particle will NOT jump immediately to where it should be at 1.5 seconds, rather it will begin its animation 1.5 seconds later and only animate for the remainder of it’s lifespan.
I’ve included two example for you, so that you can see the setting in action. The small wooden “floor” is just a reference point, so that you can tell that we’re in 3D space.
In the first example, I animated the particle emitter and left a “smoke trail” of particles behind it. I moved the camera around and through the trail so that you could see what happens to the particles in 3D space. I set the velocity property and the animation type in the physics property group to 1.00 and Explosive, respectively. Also, gravity was set to 0 and the Inherit Velocity % was set at 2%. Finally, I left the particle emitter running and made a “particle fountain” at the end. The particles had a longevity of 3 seconds and Hold Particle Release was set to 70%
In the second example, I animated the particle emitter, but moved the floor higher. I left the animator on as Explosive, set the velocity to 0, and set gravity to 0.5. That way, the particles fall straight down. The particles had a longevity of 9 seconds and Hold Particle Release was set to 30%. Floor Action was Bounce with default settings, except that bounce spread set to 15.