# CSG (Constructive Solid Geometry)

**URL:** <https://discourse.processing.org/t/csg-constructive-solid-geometry/12693>\
**Category:** Development\
**Created:** [July 13, 2019, 2:07am UTC](https://discourse.processing.org/t/csg-constructive-solid-geometry/12693 "2019-07-13T02:07:16Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [July 14, 2019, 1:10pm UTC](https://discourse.processing.org/t/csg-constructive-solid-geometry/12693/7 "2019-07-14T13:10:23Z")

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That worked.  
Do you have any idea about the 3D physics engine thing?

Eg. when I wanted to use the shapes as a marble track for a marble? I could have gravity but the marble would have to detect whether there is a shape underneath (and its angle).

Thanks!

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