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Collider/Volume for objects

Henry Grumiaux

December 14, 2018 12:31

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Actually I am capable to create objects using maya and export to sansar.

 

However, the objects are always "phantom". Doing some random shots, I discovery that every mesh should have a volume inside the container. 

 

By opening the property of the container, you can choose between globe, square or mesh. How to upload the volume and attach it to the object ? Or the question could be: Can you give me a clue (simple clue..I can research on my own) about how to make Maya generate the collider for me so I can create a fbx package with the volume inside ?

 

Anyway...I can't find any kind of documentation about it.

 

Thanks in advance !

3 comments

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  Luise December 15, 2018 05:18

  I'm using blender, I don't know if Maya has an automatic feature for creating collision meshes for an object. But you can use the object itself as a collision mesh (if it's a simple one, light in triangles) or you can create a very simple mesh, that has similar to your object dimensions e.g a cone the same size as your fir tree. Unwrap it, export it as fbx or obj and upload it with your object. Another way is to copy your mesh, decimate the replica and use this simple version as a collider. 

  Edited by Luise December 15, 2018 13:31
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  EstyssEon December 19, 2018 05:57

  Most people use a simple cube as a collision object to save on performance (less faces & kb) :) If you want more realism it's best to go with Luise's advice.

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  Just Me January 10, 2019 12:02

  The problem with using Sansar Prims (primitives) as collision objects, is granularity/resolution of the object (except for a simple cube).

  Personally, I prefer to use my own so I can set the amount of geometry used. Elongated cubes work well for most things like tree trunks, you do not need a cylinder unless they are climbed upon, but you can still use a 6 sided cylinder as there will be a flat face for physics. Sansar cylinders are quite high resolution in comparison.

  For terrains, I tend to select the navigable areas/paths and maintain the resolution, whist decimating, or even removing the geometry that is not intended to be walked on (unless you are Jesus).

  In Sansar, you have to assign the collision mesh separately, so combining the two meshes will only add to the geometry of the visible mesh and you will have no collision.