Raycasting - need help on Sprite issue

Hi guys! 

I really need help to finish a project I started. My goal was to make a simple 2.5.D engine using a Raycasting tecnique, just like the one used on Wolfestein. I've searched a lot on internet and all kind of ways to do it and I've made it to work… almost. The only thing I couldn't do is render the sprite correctly.

Here is link to my project with commented source code and a link to see the demo:

https://github.com/daniofilho/raycasting-study​

The issue is with the “pillar” sprite. If …