added object_normal_at_point() for triangles
tree90af33aac1fd04c475ca3dbb2dfc0bf0fd1fb7cc
-rw-r--r-- 38170 raytracer.erl
-rwxr-xr-x 86 run-concurrent.sh
-rwxr-xr-x 112 run-distributed.sh
-rwxr-xr-x 82 run.sh