I am trying to setup a particle animation using the sphere particle animator. I can’t find the right property to tell the animator that each particle should rotate around the center, so that you’ll get a whirlwind. Which variables I need to set in order to get the effect?
When I set the tangent velocity of X to 1, it does kinda rotate, but it also widens (like a parachute) but I want it to move inside an “invisible tube”.
Also, does anyone has experience with a shader that randomly displaces pieces of a background? Do you know the effect when it’s very hot outside, and you look down the road and see the heat coming of the road? You’ll see this kind of ‘displacement’. I really don’t know where to start :-/
The heat displacement is called refraction. If you take a look at the pro demo scene you see a stained glass window. That is close to the effect. Perhaps you could modify that a bit to produce the effect, or use perlin noise and texture2D to produce a texture (in the procedural demo) and apply that as the texture or alpha. That way it would… “warble”.
Another possibility is to use a 2 camera setup with 2 separate clipping planes. The first camera would render distant objects, then you’d use an image effect to simulate the heat refraction/displacement. The second camera would render the foreground on top of this using the “Depth Only” clear flag.
A long while back aarku had a cool whirlwind particle demo using no scripting… I can’t seem to find it now though.