CCD Filtering is not implemented

[Ughuuu]

Right now, filtering in rapier is done in narrow phase only, for contacts and intersections (bodies and areas).
The problem is in case of CCD we don't do any of these filterings, only after it's too late, arriving at cases like these:
appsinacup/godot-rapier-physics#103

The solution would be to either call the filter_contact_pair in the CCD solver:

• ccd_solver.rs function find_first_impact: This function only takes into account collision bits, so right now it will intersect but generate no contacts, and there is no way to fix this. Another option would be adding another function for custom filtering of CCD collisions.

[Ughuuu]

Here is the line where filtering is done for CCD:

rapier/src/dynamics/ccd/ccd_solver.rs

Line 179 in 9e1113c

if bh1 == bh2 // Ignore self-intersection.