Google cardBoard Android(安卓)API (十五)：两个接口中的CardboardView.Renderer
CardboardView.Renderer
public static interface CardboardView.RendererInterface for renderers who need to handle all the stereo rendering details by themselves.
Public Methods
| abstract void | onDrawFrame(HeadTransformheadTransform,EyeleftEye,EyerightEye) |
| abstract void | onFinishFrame(Viewportviewport) |
| abstract void | onRendererShutdown() |
| abstract void | onSurfaceChanged(int width, int height) |
| abstract void | onSurfaceCreated(EGLConfig config) |
Public Methods
public abstract voidonDrawFrame(HeadTransformheadTransform,EyeleftEye,EyerightEye)
Requests to draw a new frame.
The implementor is assumed to handle all stereoscopic details by itself by making use of the provided head transformation and eye parameters.
If distortion correction is enabled the GL context will be set to draw into a framebuffer backed by a texture at the time of this call. If an implementor needs to change the current framebuffer, it must be reset back afterwards to the one obtained viaglGetIntegerv(GL_FRAMEBUFFER_BINDING, ...)at the beginning of this call.
If VR mode is disabled, instead of providing the parameters of two eyes, the left eye will contain monocular rendering parameters and the right eye will be null. No distortion correction will take place in that case. For monocular rendering, the implementor should feel free to ignore the FieldOfView and instead create a perspective matrix with whatever field of view is desired for monocular rendering (ScreenParams.getWidth()/ScreenParams.getHeight() can provide the aspect ratio). See thesetVRModeEnabledmethod for details.
Parameters
| headTransform | The head transformation for this frame, independent to any eyes. |
|---|---|
| leftEye | Parameters of the left eye, or a single eye if VR mode is disabled. |
| rightEye | Parameters of the right eye, or null if VR mode is disabled. |
public abstract voidonFinishFrame(Viewportviewport)
Called before a frame is finished.
By the time of this call, the frame contents have been already drawn and, if enabled, distortion correction has been applied.
This method allows to perform additional overlay rendering over the frame results. For example, it could be used to draw markers that help users to properly center their device screens in their Cardboards.
A viewport object describing the bounds of the full surface is provided, but not set in the GL context.Rendererimplementors are responsible of setting the viewport if needed.
Parameters
| viewport | Viewport of the full GL surface. To be set by renderers if needed. |
|---|
public abstract voidonRendererShutdown()
Called on the renderer thread when the thread is shutting down.
Allows releasing GL resources and performing shutdown operations in the renderer thread. Called only if there was a previous call toonSurfaceCreated.
public abstract voidonSurfaceChanged(int width, int height)
Called when there is a change in the surface dimensions.
Viewport, field of view and projection details are automatically updated.
Note that the eye parameters passed toonDrawFrame(HeadTransform, Eye, Eye)are computed under the assumption that the surface dimensions correspond to a fullscreen landscape view. Any other configuration is likely to lead to convergence problems.
Parameters
| width | New width of the surface in pixels. |
|---|---|
| height | New height of the surface in pixels. |
public abstract voidonSurfaceCreated(EGLConfig config)
Called when the surface is created or recreated.
Parameters
| config | The EGL configuration used when creating the surface. |
|---|
更多相关文章
- 代码中设置drawableleft
- android 3.0 隐藏 系统标题栏
- Android开发中activity切换动画的实现
- Android(安卓)学习 笔记_05. 文件下载
- Android中直播视频技术探究之—摄像头Camera视频源数据采集解析
- 技术博客汇总
- android 2.3 wifi （一）
- AndRoid Notification的清空和修改
- Android中的Chronometer