Added spawnflags for keep player angles & velocity in trigger_teleport (#747)

* Added spawnflags for keep player angles & velocity in trigger_teleport
Co-authored-by: etojuice <[email protected]>

Author: SmileyAG

regamedll/dlls/triggers.cpp

@@ -1712,6 +1712,10 @@ void CTriggerPush::Touch(CBaseEntity *pOther)
 	}
 }
 
+#define SF_TELEPORT_KEEP_ANGLES 256
+#define SF_TELEPORT_KEEP_VELOCITY 512
+#define SF_TELEPORT_REDIRECT_VELOCITY_WITH_YAW_DESTINATION 1024
+
 void CBaseTrigger::TeleportTouch(CBaseEntity *pOther)
 {
 	entvars_t *pevToucher = pOther->pev;
@@ -1766,15 +1770,40 @@ void CBaseTrigger::TeleportTouch(CBaseEntity *pOther)
 
 	UTIL_SetOrigin(pevToucher, tmp);
 
-	pevToucher->angles = pentTarget->v.angles;
+#ifdef REGAMEDLL_ADD
+	if (!(pev->spawnflags & SF_TELEPORT_KEEP_ANGLES))
+#endif
+	{
+		pevToucher->angles = pentTarget->v.angles;
 
-	if (pOther->IsPlayer())
+		if (pOther->IsPlayer())
+		{
+			pevToucher->v_angle = pentTarget->v.angles;
+		}
+
+		pevToucher->fixangle = 1;
+	}
+
+#ifdef REGAMEDLL_ADD
+	if (!(pev->spawnflags & SF_TELEPORT_KEEP_VELOCITY))
+#endif
 	{
-		pevToucher->v_angle = pentTarget->v.angles;
+		pevToucher->velocity = pevToucher->basevelocity = g_vecZero;
 	}
 
-	pevToucher->fixangle = 1;
-	pevToucher->velocity = pevToucher->basevelocity = g_vecZero;
+#ifdef REGAMEDLL_ADD
+	if ((pev->spawnflags & SF_TELEPORT_REDIRECT_VELOCITY_WITH_YAW_DESTINATION) && (pev->spawnflags & SF_TELEPORT_KEEP_VELOCITY))
+	{
+		float xy_vel = pevToucher->velocity.Length2D();
+
+		Vector vecAngles = Vector(0, pentTarget->v.angles.y, 0);
+		Vector vecForward;
+		AngleVectors(vecAngles, vecForward, nullptr, nullptr);
+
+		pevToucher->velocity.x = vecForward.x * xy_vel;
+		pevToucher->velocity.y = vecForward.y * xy_vel;
+	}
+#endif
 }
 
 LINK_ENTITY_TO_CLASS(trigger_teleport, CTriggerTeleport, CCSTriggerTeleport)

regamedll/extra/Toolkit/GameDefinitionFile/regamedll-cs.fgd

@@ -2262,7 +2262,15 @@
 	]
 ]
 
-@SolidClass base(Trigger) = trigger_teleport : "Trigger teleport" []
+@SolidClass base(Trigger) = trigger_teleport : "Trigger teleport" 
+[
+	spawnflags(flags) =
+	[
+		256: "Keep angles" : 0
+		512: "Keep velocity" : 0
+		1024: "Redirect velocity with yaw from destination" : 0
+	]
+]
 
 // Function entities
 @SolidClass = func_bomb_target : "Bomb target zone"