Missing/glitched texures

I played minecraft for the first time in a while and when I joined a new lan world with my friend, as soon as I punched a block from a tree, my textures disappeared execpt for a few pixels, but they weren't the pixels from the textures, just random pixels. I restarted my game and it still was broken. I even restarted my laptop and it's still broken. I finally tried the snapshot 14w33a, and the image provided is what's going on. Any way I can fix this?