MathHelper

MathHelper

MathHelper

Members

staticEPSILON : number: 一个很小的浮点数，用于浮点数之间的近似相等

Methods

staticBarycentric(value1,value2,value3,amount1,amount2) → number

三个值的质心法插值

Name	Type	Description
`value1`	number
`value2`	number
`value3`	number
`amount1`	number	第一条边比例
`amount2`	number	第二条边比例

staticCatmullRom(value1,value2,value3,value4,amount) → number

CatmullRom曲线插值

Name	Type	Description
`value1`	number
`value2`	number
`value3`	number
`value4`	number
`amount`	number

staticClamp(value,min,max) → number

裁剪值到指定范围

Name	Type	Description
`value`	number
`min`	number
`max`	number

staticDegreeFromDegree(degree) → number

从浮点度数得到整数度数

Name	Type	Description
`degree`	number

staticDegreeFromDMS(degree,minute,second) → number

从度分秒换算成浮点度数

Name	Type	Description
`degree`	number
`minute`	number
`second`	number

staticDistance(value1,value2) → number

计算两个值的一维距离

Name	Type	Description
`value1`	number	值1
`value2`	number	值2

staticFloatSecondFromDegree(degree) → number

从浮点度得到浮点数秒

Name	Type	Description
`degree`	number

staticHermite(value1,tangent1,value2,tangent2,amount) → number

Hermite曲线插值

Name	Type	Description
`value1`	number	值1
`tangent1`	number	值1切线
`value2`	number	值2
`tangent2`	number	值2切线
`amount`	number	比例

staticIntPowOfTwo(level) → number

计算2的次幂

Name	Type	Description
`level`	number	次数

staticLerp(value1,value2,amount) → number

两值之间线性插值

Name	Type	Description
`value1`	number	值1
`value2`	number	值2
`amount`	number	从值1开始的比例

staticMinuteFromDegree(degree) → number

从浮点度得到整数分

Name	Type	Description
`degree`	number

staticNearEqual(val1,val2,tolerance) → boolean

判断两个值是否近似相等

Name	Type	Description
`val1`	number	值1
`val2`	number	值2
`tolerance`	number	optional容差

staticNearZero(val,tolerance) → boolean

判断值是否近似为零

Name	Type	Description
`val`	number	值
`tolerance`	number	optional容差

staticSecondFromDegree(degree) → number

从浮点度得到整数秒

Name	Type	Description
`degree`	number

staticSign(val) → number

获取数字的正负符号

Name	Type	Description
`val`	number

staticToDegrees(radians) → number

弧度转为度

Name	Type	Description
`radians`	number

staticToRadians(degrees) → number

度转为弧度

Name	Type	Description
`degrees`	number

staticWrapAngle(angle) → number

把弧度角度变换到0-2PI范围内

Name	Type	Description
`angle`	number	弧度