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Pointer Woes :(

Started by mrhodes Oct 21, 2003 at 9:12 PM 1 replies 450+ views

Original Post

Oct 21, 2003 at 9:12 PM

Hey everyone, I''m having a little trouble that I''m hoping some of you may be able to help me with... I''m trying to setup vertex arrays in opengl, but I seem to be getting snagged on allocating memory using calloc() I have a pointer: GLfloat *tilevertices and I am calling tiletextures = (GLfloat*)calloc(MapWidth * MapHeight * 8, sizeof(GLfloat)); this is returning 0x0000000 (NULL) Any idea what is wrong?? I just wrote a simple program to test this out, and it worked fine... in fact, if I hardcode a smaller map size in there, ie 10, it works. Currently with the map I am loading this works out to be 14400. I tried smaller numbers like 255 and that still didn''t work... Thanks for your assistance Michael Rhodes Tiger Studios Entertainment http://www.tigerstudios.net

eriel

Oct 21, 2003 at 9:34 PM

Well, first I just noticed that your declared variable is different than your allocated variable. Probably just a typo, but I thought that I''d mention it. I would try it with malloc() and see if it works, just to see if the function is the problem (I don''t really think this will work, but it may be worth trying). One thing I''m wondering is if you don''t have enough free memory to allocate.

Hope that helped, post any findings.

Senses777

Oct 21, 2003 at 10:52 PM

Double check the values you are passing to it. Display them or debug.

You might be passing huge values without knowing it perhaps?

I would say you have enough ram probably, but that could also be the problem.

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