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Diffstat (limited to 'libraries/zxing/src/com/google/zxing/ResultPoint.java')
-rw-r--r-- | libraries/zxing/src/com/google/zxing/ResultPoint.java | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/libraries/zxing/src/com/google/zxing/ResultPoint.java b/libraries/zxing/src/com/google/zxing/ResultPoint.java deleted file mode 100644 index 366ae3855..000000000 --- a/libraries/zxing/src/com/google/zxing/ResultPoint.java +++ /dev/null @@ -1,129 +0,0 @@ -/* - * Copyright 2007 ZXing authors - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.google.zxing; - -/** - * <p>Encapsulates a point of interest in an image containing a barcode. Typically, this - * would be the location of a finder pattern or the corner of the barcode, for example.</p> - * - * @author Sean Owen - */ -public class ResultPoint { - - private final float x; - private final float y; - - public ResultPoint(float x, float y) { - this.x = x; - this.y = y; - } - - public final float getX() { - return x; - } - - public final float getY() { - return y; - } - - public boolean equals(Object other) { - if (other instanceof ResultPoint) { - ResultPoint otherPoint = (ResultPoint) other; - return x == otherPoint.x && y == otherPoint.y; - } - return false; - } - - public int hashCode() { - return 31 * Float.floatToIntBits(x) + Float.floatToIntBits(y); - } - - public String toString() { - StringBuffer result = new StringBuffer(25); - result.append('('); - result.append(x); - result.append(','); - result.append(y); - result.append(')'); - return result.toString(); - } - - /** - * <p>Orders an array of three ResultPoints in an order [A,B,C] such that AB < AC and - * BC < AC and the angle between BC and BA is less than 180 degrees. - */ - public static void orderBestPatterns(ResultPoint[] patterns) { - - // Find distances between pattern centers - float zeroOneDistance = distance(patterns[0], patterns[1]); - float oneTwoDistance = distance(patterns[1], patterns[2]); - float zeroTwoDistance = distance(patterns[0], patterns[2]); - - ResultPoint pointA; - ResultPoint pointB; - ResultPoint pointC; - // Assume one closest to other two is B; A and C will just be guesses at first - if (oneTwoDistance >= zeroOneDistance && oneTwoDistance >= zeroTwoDistance) { - pointB = patterns[0]; - pointA = patterns[1]; - pointC = patterns[2]; - } else if (zeroTwoDistance >= oneTwoDistance && zeroTwoDistance >= zeroOneDistance) { - pointB = patterns[1]; - pointA = patterns[0]; - pointC = patterns[2]; - } else { - pointB = patterns[2]; - pointA = patterns[0]; - pointC = patterns[1]; - } - - // Use cross product to figure out whether A and C are correct or flipped. - // This asks whether BC x BA has a positive z component, which is the arrangement - // we want for A, B, C. If it's negative, then we've got it flipped around and - // should swap A and C. - if (crossProductZ(pointA, pointB, pointC) < 0.0f) { - ResultPoint temp = pointA; - pointA = pointC; - pointC = temp; - } - - patterns[0] = pointA; - patterns[1] = pointB; - patterns[2] = pointC; - } - - - /** - * @return distance between two points - */ - public static float distance(ResultPoint pattern1, ResultPoint pattern2) { - float xDiff = pattern1.getX() - pattern2.getX(); - float yDiff = pattern1.getY() - pattern2.getY(); - return (float) Math.sqrt((double) (xDiff * xDiff + yDiff * yDiff)); - } - - /** - * Returns the z component of the cross product between vectors BC and BA. - */ - private static float crossProductZ(ResultPoint pointA, ResultPoint pointB, ResultPoint pointC) { - float bX = pointB.x; - float bY = pointB.y; - return ((pointC.x - bX) * (pointA.y - bY)) - ((pointC.y - bY) * (pointA.x - bX)); - } - - -} |