Fix parent / child assignment logic fix

[kwokcb]

Fix AcademySoftwareFoundation#1109

Change

The matching logic (string) was "reversed" for membership so that parent assignments would override child assignments. That is the logic should be to check if the path of the assignment is completely contained within the path to the geometry being tested.

e.g.

• The assignment string "/a/b" is contained in path to the geometry: "/a/b/c" so the material can be assigned to "/a/b/c"
• The assignment string "/a/b" is contained in path to the geometry: "/a/b" so the material can be assigned to "/a/b"
• The assignment string "/a/b/c" is not contained in path to the geometry: "/a/b" so the child's material cannot be assigned to the parent geometry.

Desktop

Web

[emackey]

Confirmed that the desktop viewer fix works for my test case and the updated chess set.

I was unable to test the JavaScript build, sadly I do not have emscripten installed to build it correctly.

[emackey]

I think this can get a performance boost and cleaner code just by writing:

this._materials.length = 0;

[kwokcb]

Official PR AcademySoftwareFoundation#1113
has been put up. Closing local PR.