48 lines
1.6 KiB
Java
48 lines
1.6 KiB
Java
/*
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* Copyright 2007 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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package com.google.zxing.qrcode.detector;
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import com.google.zxing.ResultPoint;
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/**
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* <p>Encapsulates an alignment pattern, which are the smaller square patterns found in
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* all but the simplest QR Codes.</p>
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*
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* @author Sean Owen
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*/
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public final class AlignmentPattern extends ResultPoint {
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private final float estimatedModuleSize;
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AlignmentPattern(float posX, float posY, float estimatedModuleSize) {
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super(posX, posY);
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this.estimatedModuleSize = estimatedModuleSize;
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}
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/**
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* <p>Determines if this alignment pattern "about equals" an alignment pattern at the stated
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* position and size -- meaning, it is at nearly the same center with nearly the same size.</p>
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*/
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boolean aboutEquals(float moduleSize, float i, float j) {
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if (Math.abs(i - getY()) <= moduleSize && Math.abs(j - getX()) <= moduleSize) {
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float moduleSizeDiff = Math.abs(moduleSize - estimatedModuleSize);
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return moduleSizeDiff <= 1.0f || moduleSizeDiff / estimatedModuleSize <= 1.0f;
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}
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return false;
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}
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} |