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Driving a null.Three given values on each axis, one at a time.
I’d like to ask for your help with this: I’d like to utilize the effect used in the following tutorial: https://ae.tutsplus.com/tutorials/motion-graphics/create-an-effect-inspired-by-the-bourne-ultimatum-end-credits-sequence
But I’d like to use it for multiple projects, and need a quick way to adapt the thing, for that actual project. I rigged the wind values wich in this effect control the shape of things, to a null’s position, so I only need to animate that null. To drive this effect, the “wind” has to blow with a certain strength, at a certain direction along a 3d axis, at a given moment. Si when I move the null in z space, the wind blows on the z axis, etc. The strength needs to be a constant walue, wich controls the speed of the 3d stroke like effect. In my case I want to control it with a slider later on. To control the direction I have to change the “wind direction”, wich I can do by changing the position of the null. But in order to make the effect work, I need to change the direction instantly,after a given time, wich also could be controlled by a slider later on. This means, the nulls position values have to be “value,0,0” or “0,value,0” or “0,0,value”, at any given time, where “value” is the wind strength. By the way. Wind strength could be a negative value as well. So the objective is to come up with an expression, so that the wind can only blow along the axis, one way at a given time, without keyframe animation. The secound task is to randomize the “turns” direction. If for example a line goes along the y axis, when the wind direction changes it has to move along either the x, or z axes, but not the y again. So basically, when it reaches the point where it has to turn, it randomly choses a new path from the awailable four directions. I’m experimenting at the moment, but If anyone has an idea how this can be achieved via expressions, please share. In the final effect I’d like to use two slider controllers to control the strength of the wind, (the speed of the effect), The time between turns, (frequency of the turns), This way the effect could last for longer comps, and could be controlled with two sliders, without manually keyframing the whole thing for every project later on.
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