c - Reading pointer data -


i'm using library has opengl syntax. when using function data pointer, brings in first cells irrelevant numbers. 

int *rindices = (int*)malloc(icount * 500* sizeof(int)); gigetindexedmesh(&vcount, &icount, rindices); (int j = 0; j < icount; j += 3) {     printf("%d %d %d\n", rindices[j], rindices[j + 1], rindices[j + 2]); }

and out put is: 

-1107141503 1047065916 1058222111 - 1118597697 -1083120598 1041096918 -1118541674 -1082575688 1040872831 -1129197583 -1082576454 1041095778 170 190 135 100 174 172 116 175 184 176 191 178 177 176 178

this doesn't happen always. has encountered similar issue?

ps numbers should 5th row , after. in advance.

after taking quick @ documentation, should call function gigetindexedmesh twice. first, retrieve required sizes (vcount , icount) setting last parameter null. , second time retrieve indices.

in code snippet, allocate array using old value of icount. required value determined later, must determine before:

giuint vcount, icount; gigetindexedmesh(&vcount, &icount, null); giunit *indices = malloc (...); gigetindexedmesh(&vcount, &icount, indices);

i didn't find enough information on array layout. thus, didn't completed malloc call. should check return value of malloc gigetindexedmesh.


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