1

I want to call glTexSubImage2D periodically from an Android plugin (using the GL texture name I can get from Texture2D.GetNativeTextureID). I’m not sure when it’s safe to do this: as I understand it, the OpenGLES context is bound during onDrawFrame which happens on a background thread on Android.

I guess my question is: are all of my Unity scripts called during onDrawFrame on Android? If that’s the case then I can make calls to my plugin that calls glTexSubImage2D from those scripts at a time when I know the context is bound. Or maybe my Unity scripts are called from another thread, and only some OpenGLES rendering related things happen in onDrawFrame, and I need to figure some way to synchronize my update? Or maybe some script calls happen during onDrawFrame, and some don’t?

Can anyone shed any light on this for me?

2

are all of my Unity scripts called during onDrawFrame on Android?

Yes, the Unity main thread is the GLThread (in GLSurfaceView terms) so it is possible to update textures from a native plugin. You have to be careful to not assume a particular render state, only access the GL context when it’s active (like in the render callbacks; onPreRender etc), and reset the render state afterwards with GL.InvalidateState().

3

Great! Now I know it’s possible, it’s just i don’t know how to do it, could you please explain it more in depth?

I been searching a lot about this issue, I tried to integrate Unity in Eclipse, following http://unity3d.com/support/documentation/Manual/Android-Integrating%20Unity%20With%20Eclipse.html , but I don’t know how to get GL context in order to call glTexImage2D, also I don’t know how to access a TextureID from a .cs script in Unity to Java.

I also tried the other way back, integrating a Java plugin into Unity, following this tutorial Accessing the Android Compass through Unity 3D. | Random Acts of Dev... but still I don’t know how to get onDrawFrame(GL10 gl) or anything to control and call openGL functions.

Please I need advice, I relative new to unity and I’m trying to get the plugins architecture in mind. Any help will be great!

Thanks in advance!!!
Paula.,Great! Now I know it’s possible, it’s just i don’t know how to do it, could you please explain it more in depth?

I been searching a lot about this issue, I tried to integrate Unity in Eclipse, following http://unity3d.com/support/documentation/Manual/Android-Integrating%20Unity%20With%20Eclipse.html , but I don’t know how to get GL context in order to call glTexImage2D, also I don’t know how to access a TextureID from a .cs script in Unity to Java.

I also tried the other way back, integrating a Java plugin into Unity, following this tutorial Accessing the Android Compass through Unity 3D. | Random Acts of Dev... but still I don’t know how to get onDrawFrame(GL10 gl) or anything to control and call openGL functions.

Please I need advice, I relative new to unity and I’m trying to get the plugins architecture in mind. Any help will be great!

Thanks in advance!!!
Paula.

4

Great! Now I know it’s possible, it’s just i don’t know how to do it, could you please explain it more in depth?

I been searching a lot about this issue, I tried to integrate Unity in Eclipse, following http://unity3d.com/support/documentation/Manual/Android-Integrating%20Unity%20With%20Eclipse.html , but I don’t know how to get GL context in order to call glTexImage2D, also I don’t know how to access a TextureID from a .cs script in Unity to Java.

I also tried the other way back, integrating a Java plugin into Unity, following this tutorial Accessing the Android Compass through Unity 3D. | Random Acts of Dev... but still I don’t know how to get onDrawFrame(GL10 gl) or anything to control and call openGL functions.

Please I need advice, I relative new to unity and I’m trying to get the plugins architecture in mind. Any help will be great!

Thanks in advance!!!
Paula.