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Volume velocity pushing outwards

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wjm
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Joined: Nov. 2014
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I'm attempting to create a rocket launch and using the feedback i received it was deemed best to use a velocity volume to push the smoke outwards from the source (sphere).

An example of the velocity volume method i'm using , i've turned the box into a volume setting it to vector and naming it vel. I got the option to change the direction of the velocity but i want it to push away from the centre of the object. How could i achieve this?

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wind velocity.hip (660.8 KB)
7i60s.jpg (32.8 KB)
l96y3.jpg (14.8 KB)

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blackpixel
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Joined: April 2009
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In a volume vop:
If you have a point A and you want the vectors pointing away from that point, then you just subtract A from the voxel position ( P ) and normalize the result. You also might want to set the Y component of the resulting vector to zero in your case.

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velocity_from_point.hip (645.8 KB)

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