86 lines
2.2 KiB
Java
86 lines
2.2 KiB
Java
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/*
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* Copyright (C) 2008-2009 The Android Open Source Project
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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 android.gesture;
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import android.graphics.Matrix;
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import android.graphics.Path;
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/**
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* An oriented bounding box
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*/
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public class OrientedBoundingBox {
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public final float squareness;
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public final float width;
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public final float height;
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public final float orientation;
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public final float centerX;
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public final float centerY;
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OrientedBoundingBox(float angle, float cx, float cy, float w, float h) {
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orientation = angle;
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width = w;
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height = h;
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centerX = cx;
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centerY = cy;
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float ratio = w / h;
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if (ratio > 1) {
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squareness = 1 / ratio;
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} else {
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squareness = ratio;
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}
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}
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/**
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* Currently used for debugging purpose only.
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*
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* @hide
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*/
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public Path toPath() {
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Path path = new Path();
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float[] point = new float[2];
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point[0] = -width / 2;
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point[1] = height / 2;
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Matrix matrix = new Matrix();
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matrix.setRotate(orientation);
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matrix.postTranslate(centerX, centerY);
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matrix.mapPoints(point);
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path.moveTo(point[0], point[1]);
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point[0] = -width / 2;
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point[1] = -height / 2;
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matrix.mapPoints(point);
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path.lineTo(point[0], point[1]);
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point[0] = width / 2;
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point[1] = -height / 2;
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matrix.mapPoints(point);
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path.lineTo(point[0], point[1]);
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point[0] = width / 2;
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point[1] = height / 2;
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matrix.mapPoints(point);
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path.lineTo(point[0], point[1]);
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path.close();
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return path;
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}
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}
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