Game Development Reference
In-Depth Information
Now, let's look at the constructor inside the source file:
The first line after the
#include
statements initializes the static pointer
sInstance
to
nullptr
(which is null or 0). It is a good practice to set a pointer to
nullptr
just
after we declare it as we can check later on if it is valid or not. This is exactly what we do
in the constructor. We call the
assert
macro which checks whether an expression is
true
. If it is, nothing happens. However if it's
false
, the macro calls
abort()
, which
terminates the program. This check prevents more than one instance of the class to be cre-
ated, which is exactly what we want. After we've made sure that this is the only instance,
we will set the static pointer to the
this
instance.
Here is the
AssetManager::GetTexture()
implementation:
