D3DXVECTOR3 TO bool

Guessing, I would say that D3DXVECTOR is a pointer. false == 0 == NULL, and NULL is a valid pointer address.

Quote:

Original post by erissian Guessing, I would say that D3DXVECTOR is a pointer.

D3DXVECTOR3 if you're using C is just a regular struct, and under C++ D3DXVECTOR3 is a class.

Jack

Quote:

Original post by luasitdown void foo(D3DXVECTOR v) { } foo(false); // this pass compiler and work. why??

I make a mistake.

question is :

void far(bool b)
{
}

far(D3DXVECTOR3(0,0,0));
It work . why?

D3DXVECTOR3 has an implicit conversion operator operator FLOAT *(). FLOAT * has an implicit conversion to bool based on whether or not it is null.

Quote:

Original post by SiCrane D3DXVECTOR3 has an implicit conversion operator operator FLOAT *(). FLOAT * has an implicit conversion to bool based on whether or not it is null.

How to forbid the default cast? it make something under unkonwn, it easy to make bug.

You can hack the headers to remove the implicit conversion or you can use a D3DVECTOR3, which lacks the C++ member functions.