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Control forces by conditions

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I had this come up a few times today and I was wondering what was the best way to tackle it.  I am doing a melting sim of  an object thats floating in space. I am using temperature to heat the FLIP and start the melting process. if use gravity then the whole thing starts moving from the start and not just the heated parts. I was thinking if I could just apply the forces based on temperature then that would would be ideal.

I tried something like this in the pop wrange but its giving me erratic results.

float hot = @temperature;
if (hot>1) {@v *= 3;};


Also whats the equivalent of the the geometry spreadsheet in dops, if I wanted to see the values of the temperature or any attribute. I can visualize as color but would be nice to get some numbers.





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