代表从所提供的来源向提供方向无限延伸的射线.
| Name | Type | Default | Description |
|---|---|---|---|
origin |
Cartesian3 |
Cartesian3.ZERO
|
optional The origin of the ray. |
direction |
Cartesian3 |
Cartesian3.ZERO
|
optional The direction of the ray. |
Members
direction : Cartesian3
射线的方向.
origin : Cartesian3
射线的起源.
-
Default Value:
Cartesian3.ZEROMethods
static Cesium.Ray.clone(ray, result) → Ray
重复一个雷的例子.
| Name | Type | Description |
|---|---|---|
ray |
Ray | 射线重复. |
result |
Ray | optional 存储结果的对象 . |
Returns:
The modified result parameter or a new Ray instance if one was not provided. (Returns undefined if ray is undefined)
static Cesium.Ray.getPoint(ray, t, result) → Cartesian3
计算 r(t) = o + t*d 给定的射线点,
o是射线的源头,d是方向.
| Name | Type | Description |
|---|---|---|
ray |
Ray | The ray. |
t |
number | 一个标价. |
result |
Cartesian3 | optional 结果存储的对象. |
Returns:
修改后的结果参数, 如果没有提供新实例 .
Example:
//Get the first intersection point of a ray and an ellipsoid.
const intersection = Cesium.IntersectionTests.rayEllipsoid(ray, ellipsoid);
const point = Cesium.Ray.getPoint(ray, intersection.start);