chore: 添加第三方依赖库

thirdparty/rapier.js/src.ts/geometry/interaction_groups.ts

@@ -0,0 +1,18 @@
+/**
+ * Pairwise filtering using bit masks.
+ *
+ * This filtering method is based on two 16-bit values:
+ * - The interaction groups (the 16 left-most bits of `self.0`).
+ * - The interaction mask (the 16 right-most bits of `self.0`).
+ *
+ * An interaction is allowed between two filters `a` and `b` two conditions
+ * are met simultaneously:
+ * - The interaction groups of `a` has at least one bit set to `1` in common with the interaction mask of `b`.
+ * - The interaction groups of `b` has at least one bit set to `1` in common with the interaction mask of `a`.
+ * In other words, interactions are allowed between two filter iff. the following condition is met:
+ *
+ * ```
+ * ((a >> 16) & b) != 0 && ((b >> 16) & a) != 0
+ * ```
+ */
+export type InteractionGroups = number;