Archive for April, 2011
Screen Space Ambient Occlusion (SSAO) Tests
offsetof macro in C
I just discovered this macro available in C: offsetof. Here is an simple example:
struct { char a; int b; char c; } example; struct example s1; unsigned int offset; offset = (unsigned int)(&(((example *)(0))->b)); |
Thanks to offsetof (in the header stddef.h), the last line can be rewritten in:
unsigned int offset; offset = offsetof(example, b); |
