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'''Stopper''' is the common name for objects in the ''Phys_FloorStopper '' [[group]]. It is a type of physical floor and is only effective for entities (including most [[moduleobject]]s and [[prop ball]]s) other than the [[player ball]]. Since its [[collision group]] is the same as the player ball, the latter just ignores and gets through it on "contact".

Stoppers exist at the end of [[floor]]s in [[default level]]s, in the shape of a small piece of wood below the floor level, to support various kinds of modules objects that are able to be knocked down. Though is the most common type of Stopper, just like floors and [[rail]]s, every 3D model that is sent to the Stopper group works correctly as a Stopper.

Stoppers are effective to all entities other than the player ball, which leads to its frequent appearance in moduleobject-only designs in [[custom level]]s, especially to modules objects that ignore normal floors. Stoppers in this form are usually hidden or in the same shape as floors.

0.5 meters thick，5 thick (0.1 units)，5 meters wide，1 wide (1 unit)，1 meter long(0.2 units), with shorter bottom edge length 0.5 m(0.1 units); it is usually placed 0.5 m (0.1 units) below the top surface of normal [[floor]]s.

* When stoppers are touched by [[机关object]] touches Stoppers, it will produce a wooden [[音效sound effect]](Sound Effect) similar to a board collision (but it is produced. hovever, producing that sound does not need the stopper to be classified as a in any extra sound effect group)groups.* Although there is a Despite the existence of the sound effect when the agency touches the Stopper, only the first stopper in the same map level (the first in the Phys_FloorStopper group) will is able to produce a sound effecteffects. Although Though this means that you can make a hidden Stopper stopper without sound effectscan be made, all Stoppers stoppers that need sound effects in the same map should level must be attached to into the same object and be first classified firstly sent into the Phys_FloorStopper group.* The guardrail [[guard rail]] for blocking the sandbags in the third section of the thirteenth stage Level 13 is actually a series of guardrails guard rails (grouped as Phys_FloorRails) and the Stopper a stopper of the same model. The Stopper stopper is named as the standard `` "Floor_Stopper '', and the whole picture is stitched. All Stopper". Therefore, [[沙袋sandbag]] will produce a s produces the special impact sound when it hits on contact of the fenceguard rails; similarly, the fence guard rails that blocks block [[单摆turnstile]] s in the fourth measure is not actually the fence, but the same Stopper. It itself is hidden (invisible), so it is not difficult to find that the Stopper seen in the second section 4th [[推板section]] is actually fake, it does not belong to any group, and is similar to [[装饰]] That didn't work, it was named "StopperDummy"a stopper.* Stopper can add [[影子]] Just like [[路面]]floors, and the effect is not as unsightly as [[钢轨shadow]], which s can also add shadowbe added to stoppers. However, the Stopper stoppers in the original level did default levels do not add have shadows for unknown reasons.

File:13-3护栏stopper.jpg| Look at the fence at the 13-3 sandbag guard rails (bottom) and the hidden Stopper stopper (top) in {{zh|Virtools}}. Originally coincident, intentionally separated for easy easier observation. The stuck sandbag is actually the Stopper above.File:Stopper钢轨.jpg|A stopper for prop balls in the self-made map custom level [[完美思维3之场景版Perfect Thought 3]]of rails, a prop wooden ball is passing. To warn players, the texture of this "rail" is faint and grid-like. The paper ball in the picture is a player's ball that has fallen by mistake.