initial import of the bcompat plugins (userland layer)

plugins/include/amxmod_compat/VexdUM_const.inc

@@ -0,0 +1,30 @@
+#if defined _vexdum_const_included
+  #endinput
+#endif
+#define _vexdum_const_included
+
+// TraceLine Integer
+enum {
+  TR_INT_fAllSolid,     // if true, plane is not valid
+  TR_INT_fStartSolid,     // if true, the initial point was in a solid area
+  TR_INT_fInOpen,
+  TR_INT_fInWater,
+  TR_INT_iHitgroup,     // 0 == generic, non zero is specific body part
+};
+
+// TraceLine Float
+enum {
+  TR_FL_flFraction,     // time completed, 1.0 = didn't hit anything
+  TR_FL_flPlaneDist,
+};
+
+// TraceLine Vector
+enum {
+  TR_VEC_vecEndPos,     // final position
+  TR_VEC_vecPlaneNormal,  // surface normal at impact
+};
+
+// TraceLine Edict
+enum {
+  TR_ENT_pHit,      // entity the surface is on
+};