计算射线,平面,三角形,椭圆等几何美图之间的交汇点的函数.
Methods
static Cesium.IntersectionTests.grazingAltitudeLocation(ray, ellipsoid) → Cartesian3
提供离椭圆最近的射线沿线点.
| Name | Type | Description |
|---|---|---|
ray |
Ray | The ray. |
ellipsoid |
Ellipsoid | The ellipsoid. |
Returns:
离射线最近的行星点.
static Cesium.IntersectionTests.lineSegmentPlane(endPoint0, endPoint1, plane, result) → Cartesian3
计算线段和平面的交叉点.
| Name | Type | Description |
|---|---|---|
endPoint0 |
Cartesian3 | 线路段的终点. |
endPoint1 |
Cartesian3 | 线路段的另一端. |
plane |
Plane | The plane. |
result |
Cartesian3 | optional 存储结果的对象 . |
Returns:
如果没有交叉点,则交叉点或未定义.
Example:
const origin = Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883);
const normal = ellipsoid.geodeticSurfaceNormal(origin);
const plane = Cesium.Plane.fromPointNormal(origin, normal);
const p0 = new Cesium.Cartesian3(...);
const p1 = new Cesium.Cartesian3(...);
// find the intersection of the line segment from p0 to p1 and the tangent plane at origin.
const intersection = Cesium.IntersectionTests.lineSegmentPlane(p0, p1, plane);static Cesium.IntersectionTests.lineSegmentSphere(p0, p1, sphere, result) → Interval
计算线段与球的交叉点.
| Name | Type | Description |
|---|---|---|
p0 |
Cartesian3 | 线路段的终点. |
p1 |
Cartesian3 | 线路段的另一端. |
sphere |
BoundingSphere | The sphere. |
result |
Interval | optional 用于存储结果的结果 . |
Returns:
包含沿射线的scalar点的间隔,如果没有交叉点则未定义.
static Cesium.IntersectionTests.lineSegmentTriangle(v0, v1, p0, p1, p2, cullBackFaces, result) → Cartesian3
计算一个线段和一个三角线的交叉点.
| Name | Type | Default | Description |
|---|---|---|---|
v0 |
Cartesian3 | 线路段的终点. | |
v1 |
Cartesian3 | 线路段的另一端. | |
p0 |
Cartesian3 | 三角形的第一个顶点. | |
p1 |
Cartesian3 | 三角形的第二个顶点. | |
p2 |
Cartesian3 | 三角形第三个顶点. | |
cullBackFaces |
boolean |
false
|
optional
If true, will only compute an intersection with the front face of the triangle
然后返回未定义的与后脸的交叉点. |
result |
Cartesian3 | optional 将结果存储在 NT 1 NT 0 NT 2 上. |
Returns:
如果没有交叉点,则交叉点或未定义.
Computes the intersection points of a ray with an axis-aligned bounding box. (axis-aligned in the same space as the ray)
| Name | Type | Description |
|---|---|---|
ray |
Ray | The ray. |
box |
AxisAlignedBoundingBox | 轴对齐的边框 . |
result |
Interval | undefined | 包含沿射线的scalar点的间隔,如果没有交叉点则未定义. |
static Cesium.IntersectionTests.rayEllipsoid(ray, ellipsoid) → Interval
用椭圆计算射线的交叉点.
| Name | Type | Description |
|---|---|---|
ray |
Ray | The ray. |
ellipsoid |
Ellipsoid | The ellipsoid. |
Returns:
包含沿射线的scalar点的间隔,如果没有交叉点则未定义.
static Cesium.IntersectionTests.rayPlane(ray, plane, result) → Cartesian3
计算射线和飞机的交叉点.
| Name | Type | Description |
|---|---|---|
ray |
Ray | The ray. |
plane |
Plane | The plane. |
result |
Cartesian3 | optional 存储结果的对象 . |
Returns:
如果没有交叉点,则交叉点或未定义.
static Cesium.IntersectionTests.raySphere(ray, sphere, result) → Interval
计算射线与球的交叉点.
| Name | Type | Description |
|---|---|---|
ray |
Ray | The ray. |
sphere |
BoundingSphere | The sphere. |
result |
Interval | optional 用于存储结果的结果 . |
Returns:
包含沿射线的scalar点的间隔,如果没有交叉点则未定义.
static Cesium.IntersectionTests.rayTriangle(ray, p0, p1, p2, cullBackFaces, result) → Cartesian3
计算射线与三角形的交汇点为 Cartesian3 坐标.
Implements 快速最小存储 Ray/Triangle Interscript由托马斯·莫勒和本·特伦博尔主演.
| Name | Type | Default | Description |
|---|---|---|---|
ray |
Ray | The ray. | |
p0 |
Cartesian3 | 三角形的第一个顶点. | |
p1 |
Cartesian3 | 三角形的第二个顶点. | |
p2 |
Cartesian3 | 三角形第三个顶点. | |
cullBackFaces |
boolean |
false
|
optional
If true, will only compute an intersection with the front face of the triangle
然后返回未定义的与后脸的交叉点. |
result |
Cartesian3 | optional 将结果存储在 NT 1 NT 0 NT 2 上. |
Returns:
如果没有交叉点,则交叉点或未定义.
计算射线和三角形的交汇点,作为输入射线的参数距离. 当三角形位于射线后方时,结果为负.
Implements 快速最小存储 Ray/Triangle Interscript由托马斯·莫勒和本·特伦博尔主演.
| Name | Type | Default | Description |
|---|---|---|---|
ray |
Ray | The ray. | |
p0 |
Cartesian3 | 三角形的第一个顶点. | |
p1 |
Cartesian3 | 三角形的第二个顶点. | |
p2 |
Cartesian3 | 三角形第三个顶点. | |
cullBackFaces |
boolean |
false
|
optional
If true, will only compute an intersection with the front face of the triangle
然后返回未定义的与后脸的交叉点. |
Returns:
交汇点作为沿着射线的参数距离,或者在没有交汇点的情况下未定义.
计算三角形和平面的交汇点
| Name | Type | Description |
|---|---|---|
p0 |
Cartesian3 | 三角形的第一个点 |
p1 |
Cartesian3 | 三角形第二点 |
p2 |
Cartesian3 | 三角形第三点 |
plane |
Plane | Intersection plane |
Returns:
An object with properties
positions and indices, which are arrays that represent three triangles that do not cross the plane. (Undefined if no intersection exists)
Example:
const origin = Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883);
const normal = ellipsoid.geodeticSurfaceNormal(origin);
const plane = Cesium.Plane.fromPointNormal(origin, normal);
const p0 = new Cesium.Cartesian3(...);
const p1 = new Cesium.Cartesian3(...);
const p2 = new Cesium.Cartesian3(...);
// convert the triangle composed of points (p0, p1, p2) to three triangles that don't cross the plane
const triangles = Cesium.IntersectionTests.trianglePlaneIntersection(p0, p1, p2, plane);