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api independent...

Started by Thaligar Sep 7, 2005 at 12:28 PM 1 replies 950+ views

Original Post

Sep 7, 2005 at 12:28 PM

hi folks, i finally get an api independent texture class to work (multiple inheritance), my brain was some kind of dizzy during the implementation, well now i try to get it to run with the handlemanager from "Games Gems I" and now the problem, the handlemanager tries to create a template object through the std. constr., well not a problem but if i pass as template parameter the texture interface class the compiler hangs, (well not surprising) but how can i get it to run without implementing one handlemanager for each texture (2D, 3D, 1D...), because it works without a problem when i pass as template not the interface class but the specialized class, thanks in advance for your time (for reading this as well as participate), greets tgar

mossmoss

Sep 7, 2005 at 12:45 PM

I don't know this particular handlemanager class, but if it is/has a collection of your objects, then the simple answer is you need to store pointers to the interface class, not the interface class itself.

Example:

class A {   int a;public:   virtual int value() const { return a; }};class B : public A {   int b;public:   virtual int value() const { return b; }};std::vector  as;   // bad!std::vector  bs;   // okstd::vector<A*> pas;  // also okpas.push_back(new B);

Without seeing handlemanager, I'm guessing it's a similar situation as the vector in my example.

Thaligar

Sep 8, 2005 at 2:40 AM

now i feel a little bit dumb,

thanks,
greets
tgar

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