So, I was working on my model in Cinema 4d R14.034 Studio and things started disappearing or getting cut in half as if I had the View Clipping set to something incorrect. I had changed nothing, I have not updated any software it just up and decided to mess with me. I have changed the Video Clipping settings to no avail and turned off Use Open GL, as that became a problem once upon a time because of a new graphics card driver, and still nothing. The same thing happens when I try to open the project in Cinema R13. Any suggestions would be great, thanks!
This can happen sometimes if your object is too small or too large relative to the default grid. I would go to the editor menu and reset to default to get an idea of what your scale is relative to Cinema's default scale.