Skip to main content
Computer Graphics

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

Required fields*

11
  • $\begingroup$ Your code causes the same issue however it is significantly more efficent so thanks!, I have updated the post with some new diagrams that might help. $\endgroup$ Commented Sep 1, 2016 at 8:44
  • $\begingroup$ It kind of looks like its being drawn as a triangle fan, but not quite. Is it possible you can make a small grid (say 9 points, so rSimXXX = 3) and then manually inspect/dump the index buffer ? $\endgroup$ Commented Sep 1, 2016 at 8:59
  • $\begingroup$ Sure, i added a section to the bottom of the post. Let me know if you need/want more data. $\endgroup$ Commented Sep 1, 2016 at 9:40
  • $\begingroup$ Ok, things are starting to make sense, it looks like you have 0's interleaved for every other element, which explains all the spiky triangles going to one corner. I suspect your Indicie(..) objects are 32bits, but in the glDrawElements call you tell opengl the index buffer is 16bits (unsigned shorts). You can either change the glDrawElements to accept 32bit integers (change GL_UNSIGNED_SHORT -> GL_UNSIGNED_INT) or change your Indicie object to be 16bit (I guess int->short but I am not familiar with swift). $\endgroup$ Commented Sep 1, 2016 at 9:42
  • $\begingroup$ I also editted my example above to remove the redundant end-of-row if(...) $\endgroup$ Commented Sep 1, 2016 at 9:44