I put together two simple OpenGL effect rendering prototypes over the weekend, starting out with a basic GLFW application I had made earlier ( Read more... )

All draw calls now use shaders instead of the fixed-function pipeline. I need to find a better way to organize the built-in shaders since right now the application has to manage them explicitly; I'm leaning towards the usual self-registration scheme. The next task is to have Drawlist look up shaders by name or use a default shader.

As an ( Read more... )

The console was upside down because it was using the wrong projection matrix. I ran a blank level, opened the console, and dumped the frame using GLIntercept. The console projection looked suspiciously like the virtual 640x480 overlay projection, and I confirmed it by running the game at a higher resolution. The console font scaled up instead of ( Read more... )

I got Drawlist and Font working with shaders this weekend, and (unlike my prior attempt) they run just as fast as the fixed-function versions. Anything that draws now requests a specific shader program and sets up uniforms and vertex attributes instead of assuming any particular values. I had to make the rendering system less sensitive to the order ( Read more... )

I found out why fixed-function geometry broke when I enabled the shader code path in Drawlist: the shader path enabled vertex attribute arrays but didn't disable them before switching back to fixed-function. Vertex attribute arrays apparently take precedence over fixed-function arrays and screw up rendering. Disabling them solved that problem.

I stopped the crash when using a shader program but dynamic geometry is completely b0rked. I must not be setting up something right when switching from shaders to fixed-function.

I spent the last three weeks or so bringing VideoVenture into the 21st century, upgrading from old-style OpenGL 1.1 to a more modern architecture. My self-imposed goal is to make the engine compatible with Core Profile or OpenGL ES 2.0 by avoiding deprecated features. I'm still a long way off from that goal but I'm closer than before and made ( Read more... )