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