Hello everybody, I have a question:
How do references work in A7 C-Lite?

I want to create something similar to this:
(In C++ the &[ampersand] sign does this)


What would this function look like in C-Lite?

Many thanks.

The reference operator isn't actually needed because lite-c can detect if a function needs a variable or a pointer to the variable.

Thanks DJBMASTER!

But now I have another question.
This doesn't work when sending a scalar of a vector as a parameter:

No matter where I put the & sign, I always get the memory address of the vector, and not of the scalar x

Could anybody help me with this?
Thanks!

Hello!

As 'x' is the first member of the VECTOR struct, the address of myVector and its 'x' member are identical.

Therefore
var value = *((var *)&myVector);
is the same as
var value = myVector.x;

Does this answer your question?

I think structs are always passed by a pointer, so you have to take the address of the whole struct, and manipulate it on the other side of the function rather than passing individual members.

Thanks everybody, I have got it to work!

In the function I first tried float* instead of int* because the scalars in the vector are floats (I think), but this did really weird stuff. So I changed it to var* and this worked perfectly! I can send each scalar along separately

Thanks again guys!

PS: If you know anything about the float* weirdness, could you please tell me what that's about?

Found this statement in the manual...

"Lite-C additionally supports standard C/C++ integer or floating point variables for cases where you need a higher or smaller range, or better precision. The functions described in this section however use only var as argument and return values."

I think the members of the Vector struct are in-fact vars, which in turn can be a int/float.
Maybe that's why only var will work?

Maybe it´s an Error

Your right DJBMaster, vectors are by nature a set of three vars.
But the manual is 'blurry' because some functions are apparently "overloaded" to be capable of accepting
a> integer-vectors (never seen one of these though...)
b> standard-vectors (which are just three vars in a row in memory)
c> float-vectors (Ive never seen one used, but look at "_vec()" in the manual)

For a better idea of how the different game structures are built,
try taking a look at the .../GStudio7/includes/aTypes.H file.
JUST DONT ACCIDENTLY CHANGE ANY OF IT! or its re-install GameStudio time....
This will give you a good look at the "guts" of many game object structures.

Have fun...