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Using expressions to create an animated spiral in 3D space
I am looking for somone who could help me create a piece of expression to create a spiral animation that will rotate in all three planes. My example is a particle that rotates around an axis but moves forward as it rotates, much like a screw. I dont want it to spiral down to a point, I want it to be at an nice, equidistant rotation around an invisible axis that progresses forward that is in 3D so that i can orbit around it with a camera. If anyone has any insight into this or if there is another post that covers this, please let me know.
Note: I have viewed the tutorial by Fang Xiang, but it is lacking an element to connect two different steps together, and so I get confused following his instructions.
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2 Replies
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I’d make a null the parent of your particle, rotate the null, and move the null along the axis of rotation.
Dan
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I would just do what Dan said but if you really want to use expressions use this:
//I don’t have AE on this machine but this should work
diameter = 200;//pixels
zBegin = -1000;//pixels
zEnd = 1000;//pixels
spinRate = 2;//Adjust this until you like it
beginTime = 0;//seconds
endTime = 5;//seconds
//–
x = diamter * Math.sin(time * spinRate);
y = diamter * Math.cos(time* spinRate);
z = linear(time, beginTime, endTime, zBegin, zEnd);
[x, y, z]
//Enjoy~Colin
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