Math3

Math3 三维数学计算函数。提供长度、面积、角度、缓冲区、插值等计算。

Members

Methods

staticAngle(v1,v2,up) → number

计算两个向量围绕指定法向量之间所张的角度。逆时针为正

Name	Type	Description
`v1`	Vector3	向量1
`v2`	Vector3	向量2
`up`	Vector3	optional法向量

staticArea(triPoints) → number

计算三角网面积，相邻三个点依次代表一个三角形

Name	Type	Description
`triPoints`	Vector3[]	点数组

staticBuffer(points,radius,isRoundJoin,isRoundEnd,isClosed) → Vector3[]

计算缓冲区

Name	Type	Description
`points`	Vector3[]	中心线坐标
`radius`	number	半径米
`isRoundJoin`	boolean	optional是否圆角转弯
`isRoundEnd`	boolean	optional是否原型端头
`isClosed`	boolean	optional是否闭合

staticDistance(x1,y1,z1,x2,y2,z2) → number

计算一对三维坐标点之间的距离

Name	Type	Description
`x1`	number
`y1`	number
`z1`	number
`x2`	number
`y2`	number
`z2`	number

staticDistanceLineLine(points1,points2) → number

计算两条三维折线之间的最小距离

Name	Type	Description
`points1`	Vector3[]
`points2`	Vector3[]

staticDistanceLineLineAdvance(points1,points2,distLinePoints) → number

计算两条三维折线之间的最小距离，保存最短线段坐标

Name	Type	Description
`points1`	Vector3[]
`points2`	Vector3[]
`distLinePoints`	RefValue<Array<Vector3>>	保存最短线段坐标，RefValue指向结果顶点数组

staticDistancePoint(pt1,pt2) → number

计算两点之间距离

Name	Type	Description
`pt1`	Vector3
`pt2`	Vector3

staticDistancePointLine(point,points) → number

计算点到折线距离

Name	Type	Description
`point`	Vector3
`points`	Vector3[]

staticDistancePointLineAdvance(point,points,distPoint) → number

计算点到折线距离，保存最近点坐标

Name	Type	Description
`point`	Vector3
`points`	Vector3[]
`distPoint`	Vector3	最近点坐标

staticIntersectRay(trianglePoints,pt1,pt2,ptResult) → boolean

计算射线与三角形集合的交点

Name	Type	Description
`trianglePoints`	Vector3[]	点数组，相邻三个点代表一个三角形
`pt1`	Vector3	射线起点
`pt2`	Vector3	射线终点
`ptResult`	Vector3	交点坐标

staticIntersectRayIndexed(trianglePoints,indices,pt1,pt2,ptResult) → boolean

计算射线与索引三角形集合的交点

Name	Type	Description
`trianglePoints`	Array<Vector3>	点数组
`indices`	Array<number>	索引数组，相邻三个索引指向的点代表一个三角形
`pt1`	Vector3	射线起点
`pt2`	Vector3	射线终点
`ptResult`	Vector3	交点坐标

staticLength(points) → number

计算三维折线长度

Name	Type	Description
`points`	Vector3[]

staticLengthVector3Array(points,start,count) → number

计算三维折线长度

Name	Type	Description
`points`	Vector3Array
`start`	number	optional
`count`	number	optional

staticNearEqual(pt1,pt2,tolerance) → boolean

判断两个向量是否近似相等

Name	Type	Description
`pt1`	Vector3	点1
`pt2`	Vector3	点2
`tolerance`	number	optional容差值

staticNearZero(pt,tolerance) → boolean

判断向量是否近似为零向量

Name	Type	Description
`pt`	Vector3	点
`tolerance`	number	optional容差值

staticPolygonToTriangles(polyPoints,holes) → Vector3[]

多边形转换为三角网

Name	Type	Description
`polyPoints`	Vector3[]	多边形外轮廓点数组
`holes`	Vector3[][]	optional洞

staticSpline(controlPoints,insertCount,isClosed) → Vector3[]

计算样条插值曲线

Name	Type	Description
`controlPoints`	Vector3[]	控制点数组
`insertCount`	number	控制点之间插值点数目
`isClosed`	boolean	optional是否闭合