See: android-sdk\samples\android-10\ApiDemos\src\com\example\android\apis\graphics\GLES20TriangleRenderer.java
for Matrix.frustumM(mProjMatrix, 0, -ratio, ratio, -1, 1, 3, 7); which is similar. There is a lot of information out there on OpenGL projections, I suggest you read some of it. Note that: * near and far should both be +ve as they are distances in front of the camera in the direction the camera is looking. * if your triangle is at 0 on the z-axis you will need to move your camera position (which defaults to [0,0,0]) so you can see it. On Friday, September 14, 2012 9:27:35 AM UTC+1, reaktor24 wrote: > > I have a very simple application which draws a triangle at zero on the > z axis. I want an orthographics view but for the life of me this > function won't work. It just shows a black screen with no triangle. > How exactly do you use this function? I did the obvious thing which > is: > > Matrix.orthoM(projection,0,0,width,0,height,-1,1); > > > Although seeing some peoples source code they are doing all sorts of > stuff which I would of expected to be inside the orthoM method (like > calling tan functions and dividing etc). So how exactly are you > supposed to use this function? > > Steve > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
