CGAL users discussion list

[Sebastien Loriot <>]

Coordinates are all relative to the same origin and basis.

Best,

Sebastien

On 12/15/21 8:55 AM, gakkiloving ( via cgal-discuss 
Mailing List) wrote:
> Maybe my description is not clear enough.  The location of each mesh is 
> determined by its coordinates. So when cgal processes these meshes, does 
> it default that the coordinates of these meshes are in the same 
> coordinate system?
>
>         
> gakkiloving
>
>
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>
> On 12/15/2021 15:50，Sebastien Loriot ( via 
> cgal-discuss Mailing List)<> 
> <> wrote：
>
>     When adding a mesh, it is then considered as fixed (it should not be
>     modified). Its position in space is given by its coordinates.
>     When setting a transformation, it is done on the input mesh
>     even if a previous transformation was applied. If you want to
>     apply several transformation one after the other, you have to
>     update yourself the transformation accordingly.
>
>     I'm not sure to understand the question so let me know if I got it
>     wrong.
>
>     Best,
>
>     Sebastien.
>
>     On 12/14/21 4:26 PM, gakkiloving ( via
>     cgal-discuss
>     Mailing List) wrote:
>
>         Dear all:
>         When I use the triangle meshes collision detection functions or
>         intersection detection functions:
>         
> https://doc.cgal.org/latest/Polygon_mesh_processing/classCGAL_1_1Rigid__triangle__mesh__collision__detection.html
>
>         
> <https://doc.cgal.org/latest/Polygon_mesh_processing/classCGAL_1_1Rigid__triangle__mesh__collision__detection.html>
>         
> https://doc.cgal.org/latest/Polygon_mesh_processing/group__PMP__predicates__grp.html
>
>         
> <https://doc.cgal.org/latest/Polygon_mesh_processing/group__PMP__predicates__grp.html>
>         to detect collisions, intersections and inclusions among input
>         meshes.
>         Whether these methods have automatically converted these meshes
>         to the
>         same coordinate？
>
>         * If not, how to judge the positional relationships of the meshes
>         under different coordinate systems.
>         * If so, in which method is the coordinate system transformation
>         encapsulated
>
>
>         gakkiloving
>         
>
>         
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>
>
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