Forums Technical Discussion selections ?

selections ?

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_Christopher_
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How do you do procedural selections ?
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patar
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can you be more specific? what are you trying to select?
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_Christopher_
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I want to know what methods a procedural selection can be done ?
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mart1jn
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The group-node does procedural selection.
Otherwise you can make groups in a wrangle node:
if ( condition )
{
    i@group_groupName = true;
}


Is that what you're asking?
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_Christopher_
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I suppose what I want is, grouping without using the group sop, or writing points or primitives to a group. @mart1jn, I suppose that may be what I want; is there any other method ?
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Konstantin Magnus
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You can also work with attributes right away. That way you can even do transitions. While with groups it´s either points are in or out.
https://procegen.konstantinmagnus.de/ [procegen.konstantinmagnus.de]
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animatrix_
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You can select procedurally in unlimited ways. Here is how to select edge loops and rings in VEX:
https://www.dropbox.com/s/pl9vvxdww8our0i/SelectEdgeLoop_SOP_Animatrix.otl?dl=1 [www.dropbox.com]
https://www.dropbox.com/s/za9fdgsn9t7bklc/SelectEdgeRing_SOP_Animatrix.otl?dl=1 [www.dropbox.com]

You can also do this in Python but it will be “infinitely” slower as the input geometry (not input group) gets larger.
Senior FX TD @ Industrial Light & Magic
Get to the NEXT level in Houdini & VEX with Pragmatic VEX! [www.pragmatic-vfx.com]

youtube.com/@pragmaticvfx | patreon.com/animatrix | pragmaticvfx.gumroad.com
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