Jump to content
  • Advertisement
Sign in to follow this  
ganbree

Terrain Strips

This topic is 3909 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Is it possible to draw an entire Terrain using a single triangle strip? I can't find a way. I'm currently drawing a triangle strip for every row in the map. Thanks in advance.

Share this post


Link to post
Share on other sites
Advertisement
Yes, using degenerate triangles. But you might be better off using an indexed triangle list, the speed will be almost identical, and they're much easier to deal with.

If you have the following vertices:

0---------1---------2---------3
| | | |
| | | |
| | | |
4---------5---------6---------7
| | | |
| | | |
| | | |
8---------9--------10--------11


You can have an index buffer containing something like:
4, 0, 5, 1, 6, 2, 7, 3, 3, 8, 8, 4, 9, 5, 10, 6, 11, 7
Effectively, you put two backfacing triangles in the buffer so you can get to a new strip.

Actually, the more I look at that, the more I think I screwed it up, maybe someone else can confirm [smile]

Share this post


Link to post
Share on other sites
Ingenious!

It Works.

:)

I'm ashamed to say I used to be doing one draw call per quad and using set texture, until I found that it was the slowest thing in my rendering loop, despite being low-poly. Now the entire thing in one!

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

GameDev.net is your game development community. Create an account for your GameDev Portfolio and participate in the largest developer community in the games industry.

Sign me up!