1 files changed, 85 insertions, 0 deletions
diff --git a/core/java/android/gesture/OrientedBoundingBox.java b/core/java/android/gesture/OrientedBoundingBox.java
new file mode 100644
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--- /dev/null
+++ b/core/java/android/gesture/OrientedBoundingBox.java
@@ -0,0 +1,85 @@
+/*
+ * 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;
+    }
+}