For example I tied. it complied but nothing showed up.

glBegin(GL_QUADS); // Draw A Quad
glVertex3f(-1.0f, 1.0f, 0.0f); // Top Left
glVertex3f( 1.0f, 1.0f, 0.0f); // Top Right
glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right
glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left
glEnd();

AGK sets an orthogonal projection matrix that means you have to use the virtual width and height as the current bounds of the screen.

Mobile devices use OpenGL ES which has a few limitations, glBegin() and glEnd() aren't supported and glDrawArrays() must be used instead. Also GL_QUADS is deprecated and I don't think it's supported on mobile devices.

Just for the casual forum reader, please don't let this code scare you. AppGameKit Tier 2 will never ask you to know how to code OpenGL!! That is not to say you cannot use OpenGL or another other native SDK, just be prepared to force your app down a single platform distribution route. If you stick with the universal Tier 2 command set of AppGameKit, your app will compile on ALL the platforms we support without modification.