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Spiral expression + camera
Hiya,
Having some issues with a premade expression for a spiral as seen below;
shrink=time+1
radius=1000
angle=time*10
x=radius*Math.cos(degreesToRadians(angle))
y=radius*Math.sin(degreesToRadians(angle))
//z=0 // no depth
z=time*10 // with depth
centre=[640,360,0]
add(centre,[x,y,z])I want to use the spiral for my motion path for the camera. Everything works fine in it’s own comp when trying it out but if I create a new light in my main comp with the expression the light/emitter is going off-track from the spiral as seen below;
Anyone?
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6 Replies
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By itself it should work just fine. What other layers do you have in the comp? Are some of them precomped?
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These are all the layers.
Pre-comp layers contain images with their own adjustment layers and Holomatrix effect, nothing more.I guess I also could make a circular mask, make a Null to follow path and pair camera to it’s position for X+Z and increase Y over time to get about the same result.
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Yeah, I don’t see any reason it wouldn’t work. Does it make any difference if you turn off all other layers but the emitter (light), camera and particular? I made a comp like that and particular was correctly following the light.
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No difference.
However I copied everything from my Main comp over to the test-comp for the spiral for expression-edition visualisation and the light/emitter moves fine. Guess I’ll just continue my work in that comp instead then.
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Found out what caused it to go off-track. Got a world transformation of 90 degress on X on particular set up to get the spiral actually going upwards.
How would I go about correcting this? Might be useful to know in the future as well but for now I could turn everything else 90 degrees.
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Ok, that would certainly cause this issue.
Two ways to avoid the problem:
1) Switch the y and z in the expression so that you get the motion along the correct axis or
2) Rotate the camera 90 degrees around the point of interest instead of the Particular World
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