Collissions between meshes

[petrasvestartas]

Hi,

Is it possible to compute collisions between primitives rather than closest points? My scene consists of hundreads planar 3d polygons and I would like to get true or false if they are "touching" face to face.

Currently, I am doing this by RTree search of bounding boxes. Then performing boolean intersection by Clipper library, but this can be quite slow operation.

I am detecting those yellow rectangles to identify collision area. This is my narrow application for timber joints. I am trying to find as fast way as possible to identify connection zones between planar polygons: