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michaelb-01

Bullet collision ignore

the "collisionignore" point attribute works when it is ignoring static RBDs, however it doesn't seem to work when ignoring active RBDs.. is this a bug?

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I am also finding this does not work, however it is very difficult to know how to implement this attribute, since there are no example files to show how it is meant to be set up. Any simple hip files to show how this might work would be welcome. Lets say - a set of packed prims , where half of those should ignore colliding.

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As usual, there are many ways of doing this. One would be setting the collisionignore with a wrangle. The collisionignore is a string attribute and works the same way most of Houdinis include/exclude with "*", "* ^except", "only". So for your example, just group the objects you want to ignore the collision and assign the collisionignore attribute with the desired value(for example "*" for ignoring all collisions). If you want to only exlude specific objects you have to use the DOP objects name. Quick example:
 

if (@group_nocollide == 1) {
    s@collisionignore = "*";
}

Take a look at the attached file. There is a simple setup showing what I mean.
Hope that helps.
Dennis

 

collisionignore_setup_v01.hiplc

Edited by DennisSchmidt

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