Class: Ray ​

射线

Properties ​

• origin
• length

Constructors ​

• constructor

Accessors ​

• direction

Methods ​

• intersectsBox
• intersectBox
• at
• copy
• setApproxDirection
• setOrigin
• getOrigin
• getPoint
• sqrDistToPoint
• applyMatrix
• pointInTriangle
• intersectTriangle
• intersectSphere
• intersectionSegment

Properties ​

origin ​

• origin: Vector3

射线起始点

Defined in ​

src/engine/math/Ray.ts:19

length ​

• length: number = Number.MAX_VALUE

长度

Defined in ​

src/engine/math/Ray.ts:27

Constructors ​

constructor ​

• new Ray(origin?, dir?)

构建新的射线对象

Parameters ​

Defined in ​

src/engine/math/Ray.ts:34

Accessors ​

direction ​

• get direction(): Vector3

获取射线方向

Returns ​

Vector3

Defined in ​

src/engine/math/Ray.ts:43

• set direction(dir): void

设置射线方向

Parameters ​

Returns ​

void

Defined in ​

src/engine/math/Ray.ts:51

Methods ​

intersectsBox ​

▸ intersectsBox(box): boolean

判断是否和某包围盒相交

Parameters ​

Returns ​

boolean

返回是否相交

Defined in ​

src/engine/math/Ray.ts:61

intersectBox ​

▸ intersectBox(box, target): Vector3

判断是否和某包围盒相交，并计算交点

Parameters ​

Returns ​

Vector3

返回是否相交

Defined in ​

src/engine/math/Ray.ts:71

at ​

▸ at(t, target): Vector3

计算射线上的某点

Parameters ​

Returns ​

Vector3

输出值

Defined in ​

src/engine/math/Ray.ts:132

copy ​

▸ copy(src): Ray

将射线设置为从原射线的拷贝

Parameters ​

Returns ​

Ray

拷贝后的射线对象本身

Defined in ​

src/engine/math/Ray.ts:147

setApproxDirection ​

▸ setApproxDirection(dir): void

快速射至近似射线方向

Parameters ​

Returns ​

void

Defined in ​

src/engine/math/Ray.ts:159

setOrigin ​

▸ setOrigin(origin): void

设置射线起点

Parameters ​

Returns ​

void

Defined in ​

src/engine/math/Ray.ts:167

getOrigin ​

▸ getOrigin(): Vector3

获取射线起点

Returns ​

Vector3

Defined in ​

src/engine/math/Ray.ts:174

getPoint ​

▸ getPoint(t): Vector3

获取射线上指定位置的点

Parameters ​

Returns ​

Vector3

返回指定位置的点

Defined in ​

src/engine/math/Ray.ts:183

sqrDistToPoint ​

▸ sqrDistToPoint(P): number

计算距某点的距离

Parameters ​

Returns ​

number

返回计算结果

Defined in ​

src/engine/math/Ray.ts:193

applyMatrix ​

▸ applyMatrix(mat4): void

应用矩阵变换

Parameters ​

Returns ​

void

Defined in ​

src/engine/math/Ray.ts:209

pointInTriangle ​

▸ pointInTriangle(P, A, B, C): boolean

计算指定点是否在某个三角形内

Parameters ​

Returns ​

boolean

返回是否在三角形内

Defined in ​

src/engine/math/Ray.ts:226

intersectTriangle ​

▸ intersectTriangle(orig, dir, face): Vector3

判断某射线是否和某三角型相交

Parameters ​

Returns ​

Vector3

交点

Defined in ​

src/engine/math/Ray.ts:271

intersectSphere ​

▸ intersectSphere(o, dir, center, radius): Vector3

判断某射线是否和球面相交

Parameters ​

Returns ​

Vector3

交点

Defined in ​

src/engine/math/Ray.ts:342

intersectionSegment ​

▸ intersectionSegment(sega, segb, threshold): Object

在给定容差（阈值）内，射线与给定线段之间的相交测试

Parameters ​

Returns ​

Object

如果有交点，则从射线原点到交点的距离，如果没有交点，则为 -1

Defined in ​

src/engine/math/Ray.ts:373