Google最新VR消息

google最近退出了Day-dream的SDK测试版，提供给开发者，我把google的sdk运行了一遍并结合官网的介绍算搞明白了一些api的调用。下面时Google的demo地址Day-dreamDemo

我们下载并且import到AS中


这里我们看到Google的demo中给了我们4个案例。供我们参考，其他的Libraries都是以arr的形式提供给我们。可以看出来Google的用心和信息。

需要注意的时：Google建议使用7.0系统 开启vr设置
当然我们依然可以使用低版本的系统（4.4以上为佳）

我们依次看每一个demo

  1. com.google.vr.samples.controllerclient
    手柄的控制demo


    我们清晰的看到OrientationView时自定义了一个GlsurfaceView的视图，ControllerClientActivity则时整个视图。

    • OrientationView的Code段
<code class="hljs java has-numbering"> <span class="hljs-keyword">public</span> <span class="hljs-title">OrientationView</span>(Context context, AttributeSet attributeSet) {<span class="hljs-keyword">super</span>(context, attributeSet);setEGLContextClientVersion(<span class="hljs-number">2</span>);setEGLConfigChooser(<span class="hljs-number">8</span>, <span class="hljs-number">8</span>, <span class="hljs-number">8</span>, <span class="hljs-number">8</span>, <span class="hljs-number">16</span>, <span class="hljs-number">0</span>);setRenderer(<span class="hljs-keyword">new</span> Renderer());sensorManager = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);orientationSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR);phoneOrientationListener = <span class="hljs-keyword">new</span> PhoneOrientationListener();}</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li></ul>

这里是自定义控件的初始化，初始了GL2.0 并且设置了旋转传感器的监听。

private class Renderer implements GLSurfaceView.Renderer中最重要的对视图进行绘制矩阵

<code class="hljs java has-numbering"><span class="hljs-annotation">@Override</span><span class="hljs-keyword">public</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onDrawFrame</span>(GL10 unused) {GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);GLES20.glUseProgram(program);<span class="hljs-comment">// Set up camera.</span>Matrix.setIdentityM(tmpMatrix1, <span class="hljs-number">0</span>);<span class="hljs-comment">// Convert world space to head space.</span>Matrix.translateM(tmpMatrix1, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, -VIEW_SIZE);Matrix.multiplyMM(tmpMatrix2, <span class="hljs-number">0</span>, tmpMatrix1, <span class="hljs-number">0</span>, phoneInWorldSpaceMatrix, <span class="hljs-number">0</span>);<span class="hljs-comment">// Phone's Z faces up. We need it to face toward the user.</span>Matrix.rotateM(tmpMatrix2, <span class="hljs-number">0</span>, <span class="hljs-number">90</span>, <span class="hljs-number">1</span>, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>);<span class="hljs-keyword">if</span> (startFromSensorTransformation != <span class="hljs-keyword">null</span>) {<span class="hljs-comment">// Compensate for the yaw by rotating in the other direction.</span>Matrix.rotateM(tmpMatrix2, <span class="hljs-number">0</span>, -startFromSensorTransformation[<span class="hljs-number">0</span>], <span class="hljs-number">0</span>, <span class="hljs-number">1</span>, <span class="hljs-number">0</span>);} <span class="hljs-comment">// Else we're in a transient state between a resetYaw call and an onSensorChanged call.</span><span class="hljs-comment">// Convert object space to world space.</span><span class="hljs-keyword">if</span> (controller != <span class="hljs-keyword">null</span>) {controller.update();controller.orientation.toRotationMatrix(controllerInStartSpaceMatrix);}Matrix.multiplyMM(tmpMatrix1, <span class="hljs-number">0</span>, tmpMatrix2, <span class="hljs-number">0</span>, controllerInStartSpaceMatrix, <span class="hljs-number">0</span>);<span class="hljs-comment">// Set mvpMatrix.</span><span class="hljs-keyword">int</span> mvp = GLES20.glGetUniformLocation(program, <span class="hljs-string">"uMvpMatrix"</span>);Matrix.multiplyMM(mvpMatrix, <span class="hljs-number">0</span>, projectionMatrix, <span class="hljs-number">0</span>, tmpMatrix1, <span class="hljs-number">0</span>);GLES20.glUniformMatrix4fv(mvp, <span class="hljs-number">1</span>, <span class="hljs-keyword">false</span>, mvpMatrix, <span class="hljs-number">0</span>);<span class="hljs-comment">// Draw.</span><span class="hljs-keyword">int</span> position = GLES20.glGetAttribLocation(program, <span class="hljs-string">"aPosition"</span>);GLES20.glVertexAttribPointer(position, <span class="hljs-number">3</span>, GLES20.GL_FLOAT, <span class="hljs-keyword">false</span>, <span class="hljs-number">0</span>, boxVertices);GLES20.glEnableVertexAttribArray(position);<span class="hljs-keyword">int</span> color = GLES20.glGetAttribLocation(program, <span class="hljs-string">"aColor"</span>);GLES20.glVertexAttribPointer(color, <span class="hljs-number">4</span>, GLES20.GL_FLOAT, <span class="hljs-keyword">false</span>, <span class="hljs-number">0</span>, boxColors);GLES20.glEnableVertexAttribArray(color);GLES20.glDrawArrays(GLES20.GL_LINES, <span class="hljs-number">0</span>, vertexCount);GLES20.glDisableVertexAttribArray(position);GLES20.glDisableVertexAttribArray(color);}}</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li><li>31</li><li>32</li><li>33</li><li>34</li><li>35</li><li>36</li><li>37</li><li>38</li><li>39</li><li>40</li><li>41</li><li>42</li><li>43</li><li>44</li><li>45</li><li>46</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li><li>31</li><li>32</li><li>33</li><li>34</li><li>35</li><li>36</li><li>37</li><li>38</li><li>39</li><li>40</li><li>41</li><li>42</li><li>43</li><li>44</li><li>45</li><li>46</li></ul>

2 . com.google.vr.sdk.samples.simplepanowidget
panorama(全景图片)沉溺demo

<code class="hljs avrasm has-numbering">  @Overrideprotected void onCreate(Bundle savedInstanceState) {super<span class="hljs-preprocessor">.onCreate</span>(savedInstanceState)<span class="hljs-comment">;</span>setContentView(R<span class="hljs-preprocessor">.layout</span><span class="hljs-preprocessor">.main</span>_layout)<span class="hljs-comment">;</span>// Make the source link clickable.TextView sourceText = (TextView) findViewById(R<span class="hljs-preprocessor">.id</span><span class="hljs-preprocessor">.source</span>)<span class="hljs-comment">;</span>sourceText<span class="hljs-preprocessor">.setText</span>(Html<span class="hljs-preprocessor">.fromHtml</span>(getString(R<span class="hljs-preprocessor">.string</span><span class="hljs-preprocessor">.source</span>)))<span class="hljs-comment">;</span>sourceText<span class="hljs-preprocessor">.setMovementMethod</span>(LinkMovementMethod<span class="hljs-preprocessor">.getInstance</span>())<span class="hljs-comment">;</span>panoWidgetView = (VrPanoramaView) findViewById(R<span class="hljs-preprocessor">.id</span><span class="hljs-preprocessor">.pano</span>_view)<span class="hljs-comment">;</span>panoWidgetView<span class="hljs-preprocessor">.setEventListener</span>(new ActivityEventListener())<span class="hljs-comment">;</span>// Initial launch of the app <span class="hljs-keyword">or</span> an Activity recreation due to rotation.handleIntent(getIntent())<span class="hljs-comment">;</span>}</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li></ul>

以上我们可以看到初始话控件，以及设置一些事件的监听。（最重要的是学习到了新的知识（让Activity可以getIntent())

<code class="hljs java has-numbering"><span class="hljs-javadoc">/*** Called when the Activity is already running and it's given a new intent.*/</span><span class="hljs-annotation">@Override</span><span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onNewIntent</span>(Intent intent) {Log.i(TAG, <span class="hljs-keyword">this</span>.hashCode() + <span class="hljs-string">".onNewIntent()"</span>);<span class="hljs-comment">// Save the intent. This allows the getIntent() call in onCreate() to use this new Intent during</span><span class="hljs-comment">// future invocations.</span>setIntent(intent);<span class="hljs-comment">// Load the new image.</span>handleIntent(intent);}</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li></ul>

其中handleIntent的方法内写了一些引用图片的代码段（并不重要，不再展示）

再AsyTask中我看到了一个让我感觉很重要的东西

<code class="hljs mathematica has-numbering">  panoOptions = new <span class="hljs-keyword">Options</span>();panoOptions.inputType = <span class="hljs-keyword">Options</span>.TYPE_STEREO_OVER_UNDER;</code><ul class="pre-numbering"><li>1</li><li>2</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li></ul>

Options 具有两个public常量

范围 名称 值
public TYPE_MONO（单独全景图片时使用） 1
public TYPE_STEREO_OVER_UNDER(全景图片拼接为上下两部分时候使用) 2
private TYPE_START_MARKER 0
private TYPE_END_MARKER 3

2中不同模式比较
* TYPE_MONO模式下
* TYPE_STEREO_OVER_UNDER模式下

3 . com.google.vr.sdk.samples.simplevideowidget
最关注的莫过于 VR的音频播放了。在了解前，我们需要看一下Google告诉我们如何导入比如MP3,HlS等音频的操作。

<code class="hljs applescript has-numbering">/*** A test activity <span class="hljs-keyword">that</span> renders a <span class="hljs-number">360</span> video using {@link VrVideoView}.* It loads <span class="hljs-keyword">the</span> video <span class="hljs-keyword">in</span> <span class="hljs-keyword">the</span> assets <span class="hljs-keyword">by</span> default. User can use <span class="hljs-keyword">it</span> <span class="hljs-keyword">to</span> load any video files using <span class="hljs-keyword">the</span>* command:*   adb shell am start -a android.intent.action.VIEW \*     -n com.google.vr.sdk.samples.simplevideowidget/.SimpleVrVideoActivity \*     -d /sdcard/FILENAME.MP4** To load HLS urls add <span class="hljs-string">"--ei inputFormat 2"</span> <span class="hljs-keyword">to</span> pass <span class="hljs-keyword">in</span> an <span class="hljs-type">integer</span> extra which will <span class="hljs-keyword">set</span>* VrVideoView.Options.inputFormat. e.g.*   adb shell am start -a android.intent.action.VIEW \*     -n com.google.vr.sdk.samples.simplevideowidget/.SimpleVrVideoActivity \*     -d <span class="hljs-string">"https://EXAMPLE.COM/FILENAME.M3U8"</span> \*     <span class="hljs-comment">--ei inputFormat 2</span>** To specify <span class="hljs-keyword">that</span> <span class="hljs-keyword">the</span> video <span class="hljs-keyword">is</span> <span class="hljs-keyword">of</span> type stereo <span class="hljs-keyword">over</span> under (has images <span class="hljs-keyword">for</span> left <span class="hljs-keyword">and</span> right eyes),* add <span class="hljs-string">"--ei inputType 2"</span> <span class="hljs-keyword">to</span> pass <span class="hljs-keyword">in</span> an <span class="hljs-type">integer</span> extra which will <span class="hljs-keyword">set</span> VrVideoView.Options.inputType.* This can be combined <span class="hljs-keyword">with</span> other extras.* e.g.*   adb shell am start -a android.intent.action.VIEW \*     -n com.google.vr.sdk.samples.simplevideowidget/.SimpleVrVideoActivity \*     -d <span class="hljs-string">"https://EXAMPLE.COM/FILENAME.MP4"</span> \*     <span class="hljs-comment">--ei inputType 2</span>*/</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li></ul>

在我们导入前，我们需要了解视频的格式以及是否双眼等选择对应的类型，使用adb导入到手机的内存中。

<code class="hljs cs has-numbering"> <span class="hljs-comment">// Bind input and output objects for the view.</span>videoWidgetView = (VrVideoView) findViewById(R.id.video_view); <span class="hljs-comment">//VR视频控件VrVideoView</span>videoWidgetView.setEventListener(<span class="hljs-keyword">new</span> ActivityEventListener());  <span class="hljs-comment">//设置视频的回掉（处理进度条等）</span></code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li></ul>

可以看到视频VR视频播放控件的初始化，和设置监听事件。

<code class="hljs mathematica has-numbering">    <span class="hljs-keyword">Options</span> options = new <span class="hljs-keyword">Options</span>();options.inputType = <span class="hljs-keyword">Options</span>.TYPE_STEREO_OVER_UNDER;</code><ul class="pre-numbering"><li>1</li><li>2</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li></ul>


这里的模式和全景图片类似，不过注意多出来的几个Public属性，为音频的格式Default还是Hls.

4 .com.google.vr.sdk.samples.treasurehunt

首先我们先看一下目录结构：
|-TreasureHuntActivity （主要的实现类）
|-WorldLayoutData （主要是需要渲染的视图矩阵坐标）

TreasureHuntActivity的code

我们需要初始化3D音效

<code class="hljs cs has-numbering">    <span class="hljs-comment">// Initialize 3D audio engine.</span>gvrAudioEngine = <span class="hljs-keyword">new</span> GvrAudioEngine(<span class="hljs-keyword">this</span>, GvrAudioEngine.RenderingMode.BINAURAL_HIGH_QUALITY);</code><ul class="pre-numbering"><li>1</li><li>2</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li></ul>

画地板的Gl代码段

<code class="hljs java has-numbering"><span class="hljs-javadoc">/*** Draw the floor.** <p>This feeds in data for the floor into the shader. Note that this doesn't feed in data about* position of the light, so if we rewrite our code to draw the floor first, the lighting might* look strange.*/</span><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">drawFloor</span>() {GLES20.glUseProgram(floorProgram);<span class="hljs-comment">// Set ModelView, MVP, position, normals, and color.</span>GLES20.glUniform3fv(floorLightPosParam, <span class="hljs-number">1</span>, lightPosInEyeSpace, <span class="hljs-number">0</span>);GLES20.glUniformMatrix4fv(floorModelParam, <span class="hljs-number">1</span>, <span class="hljs-keyword">false</span>, modelFloor, <span class="hljs-number">0</span>);GLES20.glUniformMatrix4fv(floorModelViewParam, <span class="hljs-number">1</span>, <span class="hljs-keyword">false</span>, modelView, <span class="hljs-number">0</span>);GLES20.glUniformMatrix4fv(floorModelViewProjectionParam, <span class="hljs-number">1</span>, <span class="hljs-keyword">false</span>, modelViewProjection, <span class="hljs-number">0</span>);GLES20.glVertexAttribPointer(floorPositionParam, COORDS_PER_VERTEX, GLES20.GL_FLOAT, <span class="hljs-keyword">false</span>, <span class="hljs-number">0</span>, floorVertices);GLES20.glVertexAttribPointer(floorNormalParam, <span class="hljs-number">3</span>, GLES20.GL_FLOAT, <span class="hljs-keyword">false</span>, <span class="hljs-number">0</span>, floorNormals);GLES20.glVertexAttribPointer(floorColorParam, <span class="hljs-number">4</span>, GLES20.GL_FLOAT, <span class="hljs-keyword">false</span>, <span class="hljs-number">0</span>, floorColors);GLES20.glEnableVertexAttribArray(floorPositionParam);GLES20.glEnableVertexAttribArray(floorNormalParam);GLES20.glEnableVertexAttribArray(floorColorParam);GLES20.glDrawArrays(GLES20.GL_TRIANGLES, <span class="hljs-number">0</span>, <span class="hljs-number">24</span>);checkGLError(<span class="hljs-string">"drawing floor"</span>);}
</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li></ul>

监测是否眼睛查看到视野中的物体代码(为了可以点击消除掉cube)

<code class="hljs java has-numbering"> <span class="hljs-javadoc">/*** Check if user is looking at object by calculating where the object is in eye-space.**<span class="hljs-javadoctag"> @return</span> true if the user is looking at the object.*/</span><span class="hljs-keyword">private</span> <span class="hljs-keyword">boolean</span> <span class="hljs-title">isLookingAtObject</span>() {<span class="hljs-comment">// Convert object space to camera space. Use the headView from onNewFrame.</span>Matrix.multiplyMM(modelView, <span class="hljs-number">0</span>, headView, <span class="hljs-number">0</span>, modelCube, <span class="hljs-number">0</span>);Matrix.multiplyMV(tempPosition, <span class="hljs-number">0</span>, modelView, <span class="hljs-number">0</span>, POS_MATRIX_MULTIPLY_VEC, <span class="hljs-number">0</span>);<span class="hljs-keyword">float</span> pitch = (<span class="hljs-keyword">float</span>) Math.atan2(tempPosition[<span class="hljs-number">1</span>], -tempPosition[<span class="hljs-number">2</span>]);<span class="hljs-keyword">float</span> yaw = (<span class="hljs-keyword">float</span>) Math.atan2(tempPosition[<span class="hljs-number">0</span>], -tempPosition[<span class="hljs-number">2</span>]);<span class="hljs-keyword">return</span> Math.abs(pitch) < PITCH_LIMIT && Math.abs(yaw) < YAW_LIMIT;}</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li></ul><div class="save_code tracking-ad" style="display: block;" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li></ul>

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