OpenGL ES/ Objective-C Game Tutorial part 4: Projection matrix

In this tutorial series we will try to make a game from scratch for IOS with OpenGL
ES and Objective-C.

[InitWithData]

The projection matrix here is for a iPhone 5 screen, it may not work as expected on other iPhones. In that case change the arguments of the GLKMatrix4MakeOrtho funtion to match your device's dimensions.

[InitWithData]

Oh, thank you for pointing that out :)

[vedran]

Hi, great series. Thank you for this.
I'd like to point out an error which i don't understand why your code works but maybe you cuted it out by mistake in post.
At 2:50, nearZ and farZ do matter. They cannot be "0, 0" because that would mean that you cut of everything. Since you are in Ortho i suggest you set them to "-1, 1" so the objects on "0" would be visible.

[prathapmalempati]

Instead of 0, 0 for Z -1 and 1 works for phycal  Device also (not only simulator)

[ewanbains]

My project only works on a simulator not a device?

[andrewkohan]

For some reason, this part is working for me in the simulator but not on the device - any thoughts?