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+--- Thread: The "attribute test" of particle angle change. (/thread-2528.html)
The "attribute test" of particle angle change. - cgdvs - 07-19-2021
HI，Tyson!
The "attribute test" of particle angle change.
If the particle rotates 90 degrees (or local coordinates) in the z-axis direction, how to test the output?
I tried "spin."_ I found "spin"_ Z "only tests the value, not the angle change. So how do we test the output "particle angle" change test?
thx
RE: The "attribute test" of particle angle change. - tyFlow - 07-19-2021
You can do this with the Script operator. I've attached a file showing how.
The key is to measure the dot product of your normalized vectors, then calculate the acos of that dot and then multiply by the radian-to-degree constant, to get the angle between them.
RE: The "attribute test" of particle angle change. - cgdvs - 07-19-2021
Thank you for your papers. I'll study hard. By the way, will this particle angle test be added to the property test operator in the future?
RE: The "attribute test" of particle angle change. - tyFlow - 07-19-2021
Perhaps at some point.
RE: The "attribute test" of particle angle change. - cgdvs - 07-19-2021
Thank you. I'm looking forward to it!