auto import from //depot/cupcake/@135843
diff --git a/samples/Compass/Android.mk b/samples/Compass/Android.mk
new file mode 100644
index 0000000..9434582
--- /dev/null
+++ b/samples/Compass/Android.mk
@@ -0,0 +1,16 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := samples
+
+# Only compile source java files in this apk.
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_PACKAGE_NAME := Compass
+
+LOCAL_SDK_VERSION := current
+
+include $(BUILD_PACKAGE)
+
+# Use the following include to make our test apk.
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/samples/Compass/AndroidManifest.xml b/samples/Compass/AndroidManifest.xml
new file mode 100644
index 0000000..9aa5636
--- /dev/null
+++ b/samples/Compass/AndroidManifest.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2007 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.
+-->
+
+<!-- This file describes the code in the Compass package, which is
+ used by the system to determine how to start your application and
+ integrate it with the rest of the system. -->
+
+<!-- Declare the contents of this Android application. The namespace
+ attribute brings in the Android platform namespace, and the package
+ supplies a unique name for the application. When writing your
+ own application, the package name must be changed from "com.example.*"
+ to come from a domain that you own or have control over. -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+ package="com.example.android.compass">
+
+ <!-- This package contains an application... The 'label' is the name
+ to display to the user for the overall application, and provides
+ a default label for all following components. The syntax here is a
+ reference to one of our string resources.-->
+ <application android:label="@string/compass_app">
+
+ <!-- An Activity in the application - this is something the user
+ can launch and interact with. The "name" attribute is the
+ name of the class within your package that implements this
+ activity. -->
+ <activity android:name="CompassActivity">
+
+ <!-- An IntentFilter tells the system when it should use your
+ activity. This allows the user to get to your activity
+ without someone having to explicitly know to launch your
+ class "com.example.android.compass_app.CompassActivity". -->
+ <intent-filter>
+ <!-- The MAIN action describes a main entry point into an
+ activity, without any associated data. -->
+ <action android:name="android.intent.action.MAIN" />
+
+ <!-- This places this activity into the main app list. -->
+ <category android:name="android.intent.category.LAUNCHER" />
+ </intent-filter>
+
+ </activity>
+
+ </application>
+
+</manifest>
diff --git a/samples/Compass/res/values/strings.xml b/samples/Compass/res/values/strings.xml
new file mode 100644
index 0000000..7cf3da4
--- /dev/null
+++ b/samples/Compass/res/values/strings.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2007 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.
+-->
+
+<!-- This file contains resource definitions for displayed strings, allowing
+ them to be changed based on the locale and options. -->
+
+<resources>
+ <!-- Simple strings. -->
+ <string name="compass_app">Compass</string>
+</resources>
+
diff --git a/samples/Compass/src/com/example/android/compass/CompassActivity.java b/samples/Compass/src/com/example/android/compass/CompassActivity.java
new file mode 100644
index 0000000..c4b9566
--- /dev/null
+++ b/samples/Compass/src/com/example/android/compass/CompassActivity.java
@@ -0,0 +1,251 @@
+/*
+ * Copyright (C) 2008 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 com.example.android.compass;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+
+import javax.microedition.khronos.egl.EGL10;
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.opengles.GL10;
+import static javax.microedition.khronos.opengles.GL10.*;
+
+import android.app.Activity;
+import android.content.Context;
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorEventListener;
+import android.hardware.SensorManager;
+import android.opengl.GLSurfaceView;
+import android.opengl.GLSurfaceView.Renderer;
+import android.os.Bundle;
+import android.util.Log;
+
+/**
+ * This class provides a basic demonstration of how to use the
+ * {@link android.hardware.SensorManager SensorManager} API to draw
+ * a 3D compass.
+ */
+public class CompassActivity extends Activity implements Renderer, SensorEventListener {
+ private GLSurfaceView mGLSurfaceView;
+ private SensorManager mSensorManager;
+ private float[] mGData = new float[3];
+ private float[] mMData = new float[3];
+ private float[] mR = new float[16];
+ private float[] mI = new float[16];
+ private FloatBuffer mVertexBuffer;
+ private FloatBuffer mColorBuffer;
+ private ByteBuffer mIndexBuffer;
+ private float[] mOrientation = new float[3];
+ private int mCount;
+
+ public CompassActivity() {
+ }
+
+ /** Called with the activity is first created. */
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+
+ mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
+ mGLSurfaceView = new GLSurfaceView(this);
+ mGLSurfaceView.setRenderer(this);
+ setContentView(mGLSurfaceView);
+ }
+
+ @Override
+ protected void onResume() {
+ // Ideally a game should implement onResume() and onPause()
+ // to take appropriate action when the activity looses focus
+ super.onResume();
+ mGLSurfaceView.onResume();
+ Sensor gsensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
+ Sensor msensor = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
+ mSensorManager.registerListener(this, gsensor, SensorManager.SENSOR_DELAY_GAME);
+ mSensorManager.registerListener(this, msensor, SensorManager.SENSOR_DELAY_GAME);
+ }
+
+ @Override
+ protected void onPause() {
+ // Ideally a game should implement onResume() and onPause()
+ // to take appropriate action when the activity looses focus
+ super.onPause();
+ mGLSurfaceView.onPause();
+ mSensorManager.unregisterListener(this);
+ }
+
+ public int[] getConfigSpec() {
+ // We want a depth buffer, don't care about the
+ // details of the color buffer.
+ int[] configSpec = {
+ EGL10.EGL_DEPTH_SIZE, 16,
+ EGL10.EGL_NONE
+ };
+ return configSpec;
+ }
+
+ public void onDrawFrame(GL10 gl) {
+ /*
+ * Usually, the first thing one might want to do is to clear
+ * the screen. The most efficient way of doing this is to use
+ * glClear().
+ */
+
+ gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
+
+ /*
+ * Now we're ready to draw some 3D objects
+ */
+
+ gl.glMatrixMode(GL10.GL_MODELVIEW);
+ gl.glLoadIdentity();
+ gl.glTranslatef(0, 0, -2);
+
+ /*
+ * All the magic happens here. The rotation matrix mR reported by
+ * SensorManager.getRotationMatrix() is a 4x4 row-major matrix.
+ * We need to use its inverse for rendering. The inverse is
+ * simply calculated by taking the matrix' transpose. However, since
+ * glMultMatrixf() expects a column-major matrix, we can use mR
+ * directly!
+ */
+ gl.glMultMatrixf(mR, 0);
+ // some test code which will be used/cleaned up before we ship this.
+ //gl.glMultMatrixf(mI, 0);
+
+ gl.glVertexPointer(3, GL_FLOAT, 0, mVertexBuffer);
+ gl.glColorPointer(4, GL_FLOAT, 0, mColorBuffer);
+ gl.glDrawElements(GL_LINES, 6, GL_UNSIGNED_BYTE, mIndexBuffer);
+ }
+
+ public void onSurfaceChanged(GL10 gl, int width, int height) {
+ gl.glViewport(0, 0, width, height);
+
+ /*
+ * Set our projection matrix. This doesn't have to be done
+ * each time we draw, but usually a new projection needs to
+ * be set when the viewport is resized.
+ */
+
+ float ratio = (float) width / height;
+ gl.glMatrixMode(GL10.GL_PROJECTION);
+ gl.glLoadIdentity();
+ gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
+ }
+
+ public void onSurfaceCreated(GL10 gl, EGLConfig config) {
+ /*
+ * By default, OpenGL enables features that improve quality
+ * but reduce performance. One might want to tweak that
+ * especially on software renderer.
+ */
+ gl.glDisable(GL10.GL_DITHER);
+
+ /*
+ * Some one-time OpenGL initialization can be made here
+ * probably based on features of this particular context
+ */
+ gl.glClearColor(1,1,1,1);
+ gl.glEnable(GL10.GL_CULL_FACE);
+ gl.glShadeModel(GL10.GL_SMOOTH);
+ gl.glEnable(GL10.GL_DEPTH_TEST);
+
+ /*
+ * create / load the our 3D models here
+ */
+
+ gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
+ gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
+
+ float vertices[] = {
+ 0,0,0,
+ 1,0,0,
+ 0,1,0,
+ 0,0,1
+ };
+ float colors[] = {
+ 0,0,0,0,
+ 1,0,0,1,
+ 0,1,0,1,
+ 0,0,1,1
+ };
+ byte indices[] = { 0, 1, 0, 2, 0, 3 };
+
+ // Buffers to be passed to gl*Pointer() functions
+ // must be direct, i.e., they must be placed on the
+ // native heap where the garbage collector cannot
+ // move them.
+ //
+ // Buffers with multi-byte datatypes (e.g., short, int, float)
+ // must have their byte order set to native order
+
+ ByteBuffer vbb;
+ vbb = ByteBuffer.allocateDirect(vertices.length*4);
+ vbb.order(ByteOrder.nativeOrder());
+ mVertexBuffer = vbb.asFloatBuffer();
+ mVertexBuffer.put(vertices);
+ mVertexBuffer.position(0);
+
+ vbb = ByteBuffer.allocateDirect(colors.length*4);
+ vbb.order(ByteOrder.nativeOrder());
+ mColorBuffer = vbb.asFloatBuffer();
+ mColorBuffer.put(colors);
+ mColorBuffer.position(0);
+
+ mIndexBuffer = ByteBuffer.allocateDirect(indices.length);
+ mIndexBuffer.put(indices);
+ mIndexBuffer.position(0);
+ }
+
+ public void onAccuracyChanged(Sensor sensor, int accuracy) {
+ }
+
+ public void onSensorChanged(SensorEvent event) {
+ int type = event.sensor.getType();
+ float[] data;
+ if (type == Sensor.TYPE_ACCELEROMETER) {
+ data = mGData;
+ } else if (type == Sensor.TYPE_MAGNETIC_FIELD) {
+ data = mMData;
+ } else {
+ // we should not be here.
+ return;
+ }
+ for (int i=0 ; i<3 ; i++)
+ data[i] = event.values[i];
+
+ SensorManager.getRotationMatrix(mR, mI, mGData, mMData);
+// some test code which will be used/cleaned up before we ship this.
+// SensorManager.remapCoordinateSystem(mR,
+// SensorManager.AXIS_X, SensorManager.AXIS_Z, mR);
+// SensorManager.remapCoordinateSystem(mR,
+// SensorManager.AXIS_Y, SensorManager.AXIS_MINUS_X, mR);
+ SensorManager.getOrientation(mR, mOrientation);
+ float incl = SensorManager.getInclination(mI);
+
+ if (mCount++ > 50) {
+ final float rad2deg = (float)(180.0f/Math.PI);
+ mCount = 0;
+ Log.d("Compass", "yaw: " + (int)(mOrientation[0]*rad2deg) +
+ " pitch: " + (int)(mOrientation[1]*rad2deg) +
+ " roll: " + (int)(mOrientation[2]*rad2deg) +
+ " incl: " + (int)(incl*rad2deg)
+ );
+ }
+ }
+}