[Unity]什么是RaycastHit?

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了解RaycastHit之前先了解Raycast，具体请看→这里。

 

RaycastHit类用于存储发射射线后产生的碰撞信息。

 

 

Properties

 

barycentricCoordinate The barycentric coordinate of the triangle we hit.
collider The Collider that was hit.
distance The distance from the ray's origin to the impact point.
lightmapCoord The uv lightmap coordinate at the impact point.
normal The normal of the surface the ray hit.
point The impact point in world space where the ray hit the collider.
rigidbody The Rigidbody of the collider that was hit. If the collider is not attached to a rigidbody then it is null.
textureCoord The uv texture coordinate at the collision location.
textureCoord2 The secondary uv texture coordinate at the impact point.
transform The Transform of the rigidbody or collider that was hit.
triangleIndex The index of the triangle that was hit.

 

 

属性

 

重心坐标 我们撞击到的三角形的重心坐标。
碰撞体 撞到的碰撞体。
距离 距离，从射线的原始点到影响点。
光照地图坐标 碰撞点处的uv光照贴图坐标。
normal 射线击中的表面的法线。
point 在世界坐标中， 射线击中碰撞体的位置的影响点。
rigidbody 击中对象的刚体，如果collider没有刚体，那就会返回null。
textureCoord 碰撞位置处的uv纹理坐标。
textureCoord2 碰撞点处的次uv纹理坐标。
transform 被击中的刚体或碰撞体的Transform组件。
triangleIndex 被击中的三角形的索引。

 

 

这里声明RaycastHit hit变量，

如果通过hit获取到击中物体的transform，那不就可以控制该物体大小、旋转、移动了吗？

 

同样，可以触发击中物体的脚本。

 

 

参考文档：

[1] Unity Documentation-Scripting API : RaycastHit

[2] Unity中射线Ray和RaycastHit的简单介绍

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