com.xuexiang.xutil.data

Class GeometryUtils

java.lang.Object

com.xuexiang.xutil.data.GeometryUtils

public final class GeometryUtils
extends java.lang.Object

几何图形工具

Since:

2018/6/27 下午5:22

Author:

xuexiang

Method Summary

Modifier and Type	Method and Description
static float	evaluateValue(float fraction, java.lang.Number start, java.lang.Number end) 根据分度值，计算从start到end中，fraction位置的值。fraction范围为0 -> 1
static float	getDistanceBetween2Points(android.graphics.PointF p0, android.graphics.PointF p1) As meaning of method name.
static android.graphics.PointF[]	getIntersectionPoints(android.graphics.PointF pMiddle, float radius, java.lang.Double lineK) Get the point of intersection between circle and line.
static android.graphics.PointF	getMiddlePoint(android.graphics.PointF p1, android.graphics.PointF p2) Get middle point between p1 and p2.
static android.graphics.PointF	getPointByPercent(android.graphics.PointF p1, android.graphics.PointF p2, float percent) Get point between p1 and p2 by percent.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getDistanceBetween2Points

public static float getDistanceBetween2Points(android.graphics.PointF p0,
                                              android.graphics.PointF p1)

As meaning of method name. 获得两点之间的距离

Parameters:

p0 -

p1 -

Returns:

getMiddlePoint

public static android.graphics.PointF getMiddlePoint(android.graphics.PointF p1,
                                                     android.graphics.PointF p2)

Get middle point between p1 and p2. 获得两点连线的中点

Parameters:

p1 -

p2 -

Returns:

getPointByPercent

public static android.graphics.PointF getPointByPercent(android.graphics.PointF p1,
                                                        android.graphics.PointF p2,
                                                        float percent)

Get point between p1 and p2 by percent. 根据百分比获取两点之间的某个点坐标

Parameters:

p1 -

p2 -

percent -

Returns:

evaluateValue

public static float evaluateValue(float fraction,
                                  java.lang.Number start,
                                  java.lang.Number end)

根据分度值，计算从start到end中，fraction位置的值。fraction范围为0 -> 1

Parameters:

fraction -

start -

end -

Returns:

getIntersectionPoints

public static android.graphics.PointF[] getIntersectionPoints(android.graphics.PointF pMiddle,
                                                              float radius,
                                                              java.lang.Double lineK)

Get the point of intersection between circle and line. 获取 通过指定圆心，斜率为lineK的直线与圆的交点。

Parameters:

pMiddle - The circle center point.

radius - The circle radius.

lineK - The slope of line which cross the pMiddle.

Returns: