2 replies to this topic

[cozzie]

Hi.

Simple question.

 

I can't figure out how to use the D3DXVECTOR3 return value of:

D3DXVec3TransformCoord

 

It returns a D3DXVECTOR3*.

 

I have a a D3DXVECTOR3: mBoudingBox.min.

 

I tried:

mBoundingBox.min = D3DXVec3TransformCoord(NULL, &mBoundingBox.min, &mMatWorld);

 

But it says "no operator matches these operands".

Looking it up in MSN says that the return value is a D3DXVECTOR3*.

 

I have it working when I replace NULL by the output vector, but just want to know why it doesn't work as return value.

 

 

 

[Paradigm Shifter]

It returns the first argument. If you pass NULL as the first argument it won't work.

 

The return value is just an optional convenience if you wanted to use the returned vector as an argument to another function. Ignore the return value if you don't do that.

[cozzie]

Thanks, I'm not doing that so I'll just use the first parameter.

For code reading I found it maybe handy to read vector = D3DXvec... etc.

Edited by cozzie, 09 March 2013 - 04:58 AM.