From 506168ae540c5aabb34f97a46a6248cd73b77f8b Mon Sep 17 00:00:00 2001
From: whycxzp <glperry@163.com>
Date: 星期三, 02 四月 2025 00:46:03 +0800
Subject: [PATCH] 更新计算
---
src/main/java/com/whyc/util/PointUtil.java | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 57 insertions(+), 2 deletions(-)
diff --git a/src/main/java/com/whyc/util/PointUtil.java b/src/main/java/com/whyc/util/PointUtil.java
index a8aff9b..0289312 100644
--- a/src/main/java/com/whyc/util/PointUtil.java
+++ b/src/main/java/com/whyc/util/PointUtil.java
@@ -4,7 +4,7 @@
public class PointUtil {
public static void main(String[] args) {
- double a1 = 1, b1 = 2;
+ /*double a1 = 1, b1 = 2;
double a2 = 3, b2 = 4;
double x0 = 9, y0 = 9;
Point p1 = new Point(1, 2);
@@ -18,7 +18,17 @@
System.out.println("Intersection Point P3: (" + p3[0] + ", " + p3[1] + ")");
String position = determinePosition(a1, b1, a2, b2, x0, y0);
- System.out.println("Point P is on the " + position + " of the line P1P2.");
+ System.out.println("Point P is on the " + position + " of the line P1P2.");*/
+ double x0 = 5, y0 = 5;
+ double x1 = 0, y1 = 0;
+ double x2 = 2, y2 = 2;
+
+ double proportion = calculateProportion(x0, y0, x1, y1, x2, y2);
+ if (proportion >= 0) {
+ System.out.println("鍨傝冻鍒癿stPointStart鐨勮窛绂诲崰鏁存潯绾挎闀垮害鐨勬瘮渚嬫槸: " + proportion);
+ } else {
+ System.out.println("鍨傝冻涓嶅湪绾挎涓�");
+ }
}
public static double[] findIntersection(double a1, double b1, double a2, double b2, double x0, double y0) {
@@ -77,5 +87,50 @@
return "line";
}
}
+
+ /**
+ * 璁＄畻鐐瑰埌绾挎鐨勮窛绂诲崰绾挎闀垮害鐨勬瘮渚�
+ * @param x0 鍨傝冻x鐐�
+ * @param y0 鍨傝冻y鐐�
+ * @param x1 璧风偣x鐐�
+ * @param y1 璧风偣y鐐�
+ * @param x2 缁堢偣x鐐�
+ * @param y2 缁堢偣y鐐�
+ * @return
+ */
+ public static double calculateProportion(double x0, double y0, double x1, double y1, double x2, double y2) {
+ // 鍚戦噺 AB
+ double ABx = x2 - x1;
+ double ABy = y2 - y1;
+
+ // 鍚戦噺 AP
+ double APx = x0 - x1;
+ double APy = y0 - y1;
+
+ // 鍚戦噺绉� AB 脳 AP
+ double crossProduct = ABx * APy - APx * ABy;
+
+ if (crossProduct == 0) {
+ // 鐐瑰湪鐩寸嚎涓婏紝鍒ゆ柇鏄惁鍦ㄧ嚎娈典笂
+ double dotProduct = APx * ABx + APy * ABy;
+ double squaredLengthAB = ABx * ABx + ABy * ABy;
+ double t = dotProduct / squaredLengthAB;
+
+ if (t >= 0 && t <= 1) {
+ return t; // 鍨傝冻鍒癿stPointStart鐨勮窛绂诲崰鏁存潯绾挎闀垮害鐨勬瘮渚�
+ } else if (t < 0) {
+ //鐐瑰湪mstPointStart鐨勫欢闀跨嚎涓�
+ return 0;
+ } else {
+ //鐐瑰湪mstPointEnd鐨勫欢闀跨嚎涓�
+ return 1;
+ }
+ } else {
+ return -1; // 鐐逛笉鍦ㄧ洿绾夸笂
+ }
+ }
+
+
+
}
--
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