So, i've a problem with importing a obj file and the use it in a dynamic sim.
my obj file contains some non connected geometry, i want this different pieces to behave as individual objects in my simulation.
i use the RBD Fractured object in my dop, then in my geo node, i first add a connectivity node, declare a variable, the i ad a partion node with the rule set to the connectivity nodes name.
but still, my geo behaves like a snigel obejct.
please help!
break up imported geo
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yes i know, but the problem is i can't the sphere to act in my RBD Fractured simulation.
do this:
use the copy node to copy the sphere to a grid. then turn that into a RBD Fractured object. create a ground plane. the sphere should now act as single non connected spheres, but they don't they act as one big object instead.
although i solved this by exporting my object as fbx instead of .obj.
but i would really like to know why the obj file isn't working.
thanks.
do this:
use the copy node to copy the sphere to a grid. then turn that into a RBD Fractured object. create a ground plane. the sphere should now act as single non connected spheres, but they don't they act as one big object instead.
although i solved this by exporting my object as fbx instead of .obj.
but i would really like to know why the obj file isn't working.
thanks.
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The problem with your copying the sphere is that in order for the Fractured/Glue objects to work, each different object must be in it's own group and that group string should be set in the mask on the dop object. Houdini can do this automatically for you when the tool is invoked if your input geo doesn't have an groups; if it does it leaves it up to you to have it setup. In your case, all the spheres belong to the 2 groups your geometry has on it already.
To make this work do the following:
After you have copied your sphere to the grid, append a Group sop. Go to the Edit tab and in the delete tab, place a * in the group field. This will destroy your two default groups. Now you can run the RBD Fractured/Glue Object tool and it will behave as you expect.
To make this work do the following:
After you have copied your sphere to the grid, append a Group sop. Go to the Edit tab and in the delete tab, place a * in the group field. This will destroy your two default groups. Now you can run the RBD Fractured/Glue Object tool and it will behave as you expect.
Graham Thompson, Technical Artist @ Rockstar Games
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