Hello
I want a random unite vector from a point along Its normal and with arbitrary angle ( like a cone ).
I was expecting “sample_hemisphere(vector center, float bias, vector2 u)” does the trick cause It has bias but couldn't get the desired result.
should I write my own code to do this or there is a commend that I can use in wrangle?
thank you
random vector around an axis
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- MirHadi
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- shishkovdima
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Hello,
This tutorial may help you: https://vimeo.com/226167508 [vimeo.com]
If not, please share some more information on what exactly you want to achieve.
Have a great day!
This tutorial may help you: https://vimeo.com/226167508 [vimeo.com]
If not, please share some more information on what exactly you want to achieve.
Have a great day!
-
- toadstorm
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Try sample_direction_cone():
You can also use the Attribute Randomize SOP to handle this… or, if you want to stay in VEX, crack that SOP open and check out the wrangle inside. The code is a bit complex but you might get some good ideas from it.
vector axis = @N; // cone pointing axis vector2 u = rand(ch("seed")); // random unit vector2 vector out_v = sample_direction_cone(axis, radians(ch("angle")), u);
You can also use the Attribute Randomize SOP to handle this… or, if you want to stay in VEX, crack that SOP open and check out the wrangle inside. The code is a bit complex but you might get some good ideas from it.
MOPs (Motion Operators for Houdini): http://www.motionoperators.com [www.motionoperators.com]
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