P, DOWN, LEFT, RIGHT, etc) indicating collision directions. Use bitwise operators to check the values stored here.
Useful for things like one-way platforms (e.g. allowCollisions = UP;). The accessor "solid" just flips this variable between NONE and ANY.</p></div></div><div class="field "><a name="angle"></a><h3 class="anchor"><code><span class="label label-meta label-meta-value" title="Used to store default values for fields and function arguments.">@:value(0)</span><a href="#angle"><span class="identifier"