mirror of
https://gitee.com/akwkevin/aistudio.-wpf.-diagram
synced 2026-04-05 16:56:34 +08:00
55 lines
1.8 KiB
C#
55 lines
1.8 KiB
C#
/*
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* Copyright 2012 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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namespace ZXing.Common.Detector
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{
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public static class MathUtils
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{
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/// <summary>
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/// Ends up being a bit faster than {@link Math#round(float)}. This merely rounds its
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/// argument to the nearest int, where x.5 rounds up to x+1. Semantics of this shortcut
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/// differ slightly from {@link Math#round(float)} in that half rounds down for negative
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/// values. -2.5 rounds to -3, not -2. For purposes here it makes no difference.
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/// </summary>
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/// <param name="d">real value to round</param>
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/// <returns>nearest <c>int</c></returns>
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public static int round(float d)
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{
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if (float.IsNaN(d))
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return 0;
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if (float.IsPositiveInfinity(d))
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return int.MaxValue;
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return (int)(d + (d < 0.0f ? -0.5f : 0.5f));
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}
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public static float distance(float aX, float aY, float bX, float bY)
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{
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float xDiff = aX - bX;
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float yDiff = aY - bY;
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return (float)Math.Sqrt(xDiff * xDiff + yDiff * yDiff);
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}
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public static float distance(int aX, int aY, int bX, int bY)
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{
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int xDiff = aX - bX;
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int yDiff = aY - bY;
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return (float)Math.Sqrt(xDiff * xDiff + yDiff * yDiff);
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}
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}
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}
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