比例换算

Assets/BowArrow/Scripts/Manager/LoginMgr.cs

@@ -118,38 +118,56 @@ public class UserSettings {
         PlayerPrefs.SetString("UserSettings", JsonConvert.SerializeObject(this));
     }
 }
+/*
+描述1
+已知：
+    屏幕宽高比例w:h=16:9，屏幕尺寸s=60.11英寸，屏幕距离d=2.50米，实际指向右边树的角度为e=5.56°。
+可知：
+    屏幕尺寸s1 = (s * 0.0254)米
+    屏幕单位大小为unit，关系式(w*unit)^2 + (h*unit)^2 = s1^2
+结果：
+    向量（玩家->右边树）在屏幕上投影的长度比例q = tan(e) * d / unit
+*/
+
+/*
+描述2（适配各种尺寸的屏幕）
+已知：
+    屏幕宽高比例w:h=16:9，屏幕尺寸s=(任意)英寸，屏幕距离d=(任意)米，游戏指向右边树的角度为r=27.30°。
+    借用描述1的结果q
+可知：
+    屏幕尺寸s1 = (s * 0.0254)米
+    屏幕单位大小为unit，关系式(w*unit)^2 + (h*unit)^2 = s1^2
+    实际指向右边树的角度为e = atan(q * unit / d) 
+结果：
+    游戏转动角度：实际转动角度 = r / e
+*/
 public class BowRotateConvert {
     public float screenSize = 60; //屏幕尺寸（英寸）
     public float screenDistance = 2.5f; //玩家距离屏幕多远（米）
 
     // 游戏旋转角度 : 实际旋转角度
     public float GetRate() {
-        float rateMeterInch = 0.0254f; //比率（米:英寸）
-        float weightScreenWidth = 16; //屏幕宽比值
-        float weightScreenHeight = 9; //屏幕高比值
-        //单位屏幕比值对应大小
-        float unitWeightSize = rateMeterInch * screenSize 
-            / (Mathf.Pow(weightScreenWidth, 2) + Mathf.Pow(weightScreenHeight, 2));
-        float screenWidth = weightScreenWidth * unitWeightSize;
-        float screenCenterToTreeSize = GetTreeWeight() * unitWeightSize;
-        return GetTreeAngleInRadian() / Mathf.Atan(screenCenterToTreeSize / screenDistance);
-    }
-
-    private float GetTreeWeight() {
-        float screenSize = 60.11f; //屏幕尺寸（英寸）
-        float screenDistance = 2.5f; //玩家距离屏幕多远（米）
-        float rateMeterInch = 0.0254f; //比率（米:英寸）
-        float weightScreenWidth = 16; //屏幕宽比值
-        float weightScreenHeight = 9; //屏幕高比值
-        //单位屏幕比值对应大小
-        float unitWeightSize = rateMeterInch * screenSize 
-            / (Mathf.Pow(weightScreenWidth, 2) + Mathf.Pow(weightScreenHeight, 2));
-        float q1 = (float) Math.Tan(5.56 / 180 * Math.PI) * screenDistance; //实际玩家到左树的横向距离
-        float w1 = q1 / unitWeightSize; //实际玩家到左树的横向距离比重
-        return w1;
+        double w = 16;
+        double h = 9;
+        double s = Convert.ToDouble(screenSize);
+        double d = Convert.ToDouble(screenDistance);
+        double r = 27.3 / 180 * Math.PI;
+        double q = get_q();
+        double s1 = s * 0.0254;
+        double unit = Math.Sqrt(Math.Pow(s1, 2) / (Math.Pow(w, 2) + Math.Pow(h, 2)));
+        double e = Math.Atan(q * unit / d);
+        return (float) (r / e);
     }
 
-    private float GetTreeAngleInRadian() {
-        return (float) (27.3 / 180 * Math.PI);
+    private double get_q() {
+        double w = 16;
+        double h = 9;
+        double s = 60.11;
+        double d = 2.5;
+        double e = 5.56 / 180 * Math.PI;
+        double s1 = s * 0.0254;
+        double unit = Math.Sqrt(Math.Pow(s1, 2) / (Math.Pow(w, 2) + Math.Pow(h, 2)));
+        double q = Math.Tan(e) * d / unit;
+        return q;
     }
 }