Fps drop when viewing chunks from different positions

Performance Tuning
#1

Hi, I have a problem with my chunk rendering system.

I have a class that allows me to create chunks. To do so I simply store in a variable a Chunk object and then in my Renderer.java I render it.

The problem is: when I see the chunks from a certain position, all runs smoothly. But when I try to look behind me, I experience an enormous fps drop.

Screenshots:

This is normal

This is when I try to look behind me. (Note the lag)

What did I wrong? I’m new to the OpenGL world :frowning:

If you need some other code please tell me.

Thanks in advance

Chunk.java (http://pastebin.java-gaming.org/70ac744880116)
Renderer.java (http://pastebin.java-gaming.org/0ac745881061e)

#2

You have a different amount of overdraw when viewing from different directions. This shows you are fillrate limited. Solution involves zooming out :stuck_out_tongue: or ‘optimizing’ the order of the cubes in your chunk, sorting them coarsely front to back, once every N frames.

#3

Thanks for your reply, now I finally figured out the problem!

Do you have any example on how to “coarsely sort the cubes front to back”?

Thank you

#4

I’m the creator of the tutorials you are watching (pancakesimone on YouTube), and I have to say that my tutorials are very outdated and shouldn’t be followed. I used horrible coding practices, and old deprecated functions of OpenGL.

Sorry about that.

#5

Hi opiop, I’m happy to see your reply. Your tutorials are a lot useful and well-explained, so I used to watch them from the beginning of my “opengl adventure”.

In your pc the code was working perfectly, but why not in mine?
Do you have some suggestions/examples? Thank you.

P.S. Sorry for the bad english men :stuck_out_tongue:

#6

It’s probably just that his graphics card is more powerful than yours.

#7

Yes, it’s very probable… If anyone has a suggestion, please tell me. I’m going crazy.