1. 修复 RangeF

Project.FLY.Misc/MISC/RangeF.cs

@@ -34,7 +34,7 @@ namespace Misc
         {
             get
             {
-                if (!double.IsNaN(Begin))
+                if (IsValid)
                     return (End + Begin) / 2;
                 else
                     return double.NaN;
@@ -50,9 +50,9 @@ namespace Misc
             get
             {
                 if (IsValid)
-                    return End - Begin + 1;
+                    return End - Begin;
                 else
-                    return Misc.MyBase.NULL_VALUE;
+                    return double.NaN;
             }
         }
 
@@ -117,7 +117,7 @@ namespace Misc
         /// 平移
         /// </summary>
         /// <param name="offset"></param>
-        public void Move(int offset)
+        public void Move(double offset)
         {
             Begin += offset;
             End += offset;