Module: zrender/tool/curve

Methods

staticmodule:zrender/tool/curve.cubicAt(p0, p1, p2, p3, t){number}

tool/curve.js, line 45

计算三次贝塞尔值

Name	Type	Description
p0	number
p1	number
p2	number
p3	number
t	number

staticmodule:zrender/tool/curve.cubicDerivativeAt(p0, p1, p2, p3, t){number}

tool/curve.js, line 61

计算三次贝塞尔导数值

Name	Type	Description
p0	number
p1	number
p2	number
p3	number
t	number

staticmodule:zrender/tool/curve.cubicExtrema(p0, p1, p2, p3, extrema){number}

tool/curve.js, line 172

计算三次贝塞尔方程极限值的位置

Name	Type	Description
p0	number
p1	number
p2	number
p3	number
extrema	Array.<number>

staticmodule:zrender/tool/curve.cubicRootAt(p0, p1, p2, p3, val, roots){number}

tool/curve.js, line 80

计算三次贝塞尔方程根，使用盛金公式

Name	Type	Description
p0	number
p1	number
p2	number
p3	number
val	number
roots	Array.<number>

staticmodule:zrender/tool/curve.cubicSubdivide(p0, p1, p2, p3, t, out)

tool/curve.js, line 216

细分三次贝塞尔曲线

Name	Type	Description
p0	number
p1	number
p2	number
p3	number
t	number
out	Array.<number>

staticmodule:zrender/tool/curve.quadraticExtremum(p0, p1, p2){number}

tool/curve.js, line 398

计算二次贝塞尔方程极限值

Name	Type	Description
p0	number
p1	number
p2	number