表示二维物理场景的单个实例。
二维物理场景拥有添加到其中的所有二维物理组件对象，并且可以对其执行模拟以及执行查询。所有这些功能都与任何其他物理场景隔离。使用此功能，可以共存多个独立的物理场景。
| subStepCount | 上次模拟步骤期间发生的模拟子步骤数量。 |
| subStepLostTime | 由于模拟子步骤达到允许的最大子步骤数量而“丢失”的模拟时间量。 |
| BoxCast | 将一个盒子投射到 PhysicsScene2D 中的碰撞体上，仅返回第一个交点。 |
| CapsuleCast | 将一个胶囊投射到 PhysicsScene2D 中的碰撞体上，仅返回第一个交点。 |
| CircleCast | 将一个圆投射到 PhysicsScene2D 中的碰撞体上，仅返回第一个交点。 |
| GetRayIntersection | 将 3D 射线投射到场景中的 2D 碰撞体上。 |
| IsEmpty | 确定物理场景是否为空。 |
| IsValid | 确定物理场景是否有效。 |
| Linecast | 将线段投射到 PhysicsScene2D 中的碰撞体上，仅返回第一个交点。 |
| OverlapArea | 检查 PhysicsScene2D 中碰撞体上的区域（非旋转框），仅返回第一个交点。 |
| OverlapBox | 检查 PhysicsScene2D 中碰撞体上的盒子，仅返回第一个交点。 |
| OverlapCapsule | 检查 PhysicsScene2D 中碰撞体上的胶囊，仅返回第一个交点。 |
| OverlapCircle | 检查 PhysicsScene2D 中碰撞体上的圆，仅返回第一个交点。 |
| OverlapPoint | 检查 PhysicsScene2D 中碰撞体上的点，仅返回第一个交点。 |
| Raycast | 将射线投射到 PhysicsScene2D 中的碰撞体上，仅返回第一个交点。 |
| Simulate | 模拟与此 PhysicsScene 关联的物理。 |
| OverlapCollider | 检查 PhysicsScene2D 中碰撞体上的碰撞体，返回所有交点。 |
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.