From e3bd13f6f12aae8a01a61d3368373fa9636549eb Mon Sep 17 00:00:00 2001
From: nilupeng <qingingrunt2010@qq.com>
Date: Thu, 13 Jan 2022 10:16:30 +0000
Subject: [PATCH] 三角算法更新
---
app/src/main/java/com/demo/navtogether/utils/TriangleUtils.java | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 53 insertions(+), 3 deletions(-)
diff --git a/app/src/main/java/com/demo/navtogether/utils/TriangleUtils.java b/app/src/main/java/com/demo/navtogether/utils/TriangleUtils.java
index 02477ec..48be8f0 100644
--- a/app/src/main/java/com/demo/navtogether/utils/TriangleUtils.java
+++ b/app/src/main/java/com/demo/navtogether/utils/TriangleUtils.java
@@ -18,11 +18,13 @@
System.out.println(String.format("角度 坐标计算：a:%s,b:%s,c:%s",getDegrees(pA,pB,pC),getDegrees(pB,pC,pA),getDegrees(pC,pA,pB)));
System.out.println(String.format("角度 转换为边长计算：a:%s,b:%s,c:%s",getDegrees2(pA,pB,pC),getDegrees2(pB,pC,pA),getDegrees2(pC,pA,pB)));
System.out.println(String.format("角度 边长计算：a:%s,b:%s,c:%s",getDegrees(a,b,c),getDegrees(b,c,a),getDegrees(c,a,b)));
- System.out.println("边长 c："+getLengthOfHypotenuse(a,b ));
+ System.out.println("边长 c："+getHypotenuseFromLength(a,b ));
System.out.println("边长 c："+getLengthOfSide(a,b ,getDegrees2(pA,pB,pC)));
System.out.format("%s 度的余弦值为 %s", Math.toRadians(90), Math.cos(Math.toRadians(90)));
}
+
+ /************************直角三角算法*******************************/
/**
* 直角三角获取斜边
@@ -30,8 +32,56 @@
* @param b 直角边长
* @return 斜边边长
*/
- public static Double getLengthOfHypotenuse(double a,double b){
+ public static Double getHypotenuseFromLength(double a,double b){
return Math.sqrt(a*a+b*b);
+ }
+
+ /**
+ * 直角三角形 根据角度和直角边长求斜边
+ * @param degree 角度
+ * @param width 直角边长
+ * @return 斜边边长
+ */
+ public static double getHypotenuseFromDegree(double degree,double width){
+ double cos = Math.cos(Math.toRadians(degree));//余弦
+ return width / cos;
+ }
+
+ /**
+ * 直角三角形 根据角度和斜边求直角边
+ * @param degree 角度
+ * @param width 斜边
+ * @return 斜边边长
+ */
+ public static double getRightSideFromDegree(double degree,double width){
+ double cos = Math.cos(Math.toRadians(degree));
+ return width * cos;
+ }
+
+ /**
+ * 直角三角形 根据直角边和斜边求直角边
+ * @param a 直角边
+ * @param b 斜边
+ * @return 直角边长
+ */
+ public static double getRightSideFromLength(double a,double b){
+ return Math.sqrt(b*b - a*a);
+ }
+
+
+
+ /************************end 直角三角算法*******************************/
+
+ /**
+ * 根据 B角和C角的a边长，获取A角-C角的b边长
+ * @param A
+ * @param B
+ * @param a
+ * @return
+ */
+ public static double getSideFromSideAndDegree(double A,double B,double a){
+ // a÷sin A == b ÷ sin B
+ return a/Math.sin(Math.toRadians(A))*Math.sin(Math.toRadians(B));
}
/**
@@ -94,7 +144,7 @@
return (int) (180 * radian / Math.PI);
}
-/* *//**
+ /**
* 根据坐标 获取角度
* @param pA 坐标
* @param degreesPoint 坐标 获取该点的角度
--
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