58 lines
1.9 KiB
C++
Executable File
58 lines
1.9 KiB
C++
Executable File
// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
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#ifndef __ZXING_COMMON_DETECTOR_MATHUTILS_H__
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#define __ZXING_COMMON_DETECTOR_MATHUTILS_H__
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/*
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* Copyright 2012 ZXing authors All rights reserved.
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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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#include <cmath>
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namespace zxing {
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namespace common {
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namespace detector {
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class MathUtils {
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private:
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MathUtils();
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~MathUtils();
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public:
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/**
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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.
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*/
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static inline int round(float d) {
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return (int)(d + 0.5f);
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}
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static inline float distance(float aX, float aY, float bX, float bY) {
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float xDiff = aX - bX;
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float yDiff = aY - bY;
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return sqrt(xDiff * xDiff + yDiff * yDiff);
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}
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static inline float distance(int aX, int aY, int bX, int bY) {
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int xDiff = aX - bX;
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int yDiff = aY - bY;
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return sqrt(float(xDiff * xDiff + yDiff * yDiff));
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}
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};
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}
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}
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}
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#endif
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