From: Marc Mendez (mmendez++at++silicon-worlds.fr)
Date: 10/31/2002 07:43:11
Related to the question of Denis Taniguchi, we are facing about the same
problem:
we d like to provide our application special scene graph node we d be
able to insert.
For example, a trail could be displayed in a pfTrailNode object.
If I write the following:
class pfTrailNode : public pfNode
{
public:
pfTrailNode(void);
........................................
virtual int draw(void);
........................................
private:
........................................
};
How could I tell Performer to draw it every frame __WITHOUT__ calling
myobj->draw() in the draw loop ???
I ve seen examples in the Programming in C++ with Performer chapter of
theprogramming guide, but it reveals some undocumented function calls:
app() in the Rotor example.
Is there some example of new scene graph node definitions ?
pfRegards,
Marc.
MLM Veraart wrote:
>Denis Taniguchi wrote:
>
>
>>Hi all,
>>
>>We developed a HUD that works fine, using the already well known GL calls in
>>the draw process, and so forth.
>>But now, it would be interesting if we could manage to build a class
>>"pfHUD", and for example, having a Draw method which we would call from the
>>Draw process. In other words we would like to encapsulate the GL calls made
>>on the Draw process in a class method.
>>As long as I tried, simply defining a class and calling it on draw or
>>pos-draw is not the right way.
>>Did anyone already do this? Any ideas, tips, sample codes will be
>>appreciated.
>>Regards!
>>
>>Denis Taniguchi
>>Yokohama National University - Dept. Information Media and Environment
>>Sciences
>>
>>
>
>Hello,
>
>It probably has to do with the multi process stuff.
>
>Define a pointer to the class in your Shared memory struct.
>
>In the class definition use
>
>class MyClass
>{
> PFSTRUCT_DECLARE
>
>public:
> // the rest of the class
> void draw(pfChannel* chan);
>};
>
>This will ensure your class will be in shared memory when allocated.
>
>Allocate the instance with
>
>Shared->myclass = new MyClass();
>
>
>Mario
>
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-- Marc Mendez Silicon Worlds SA12, rue de Chatillon 75014 Paris Tel : +33 (01) 53 90 11 13 Fax : +33 (01) 53 90 11 12
Without C, we would only have Basi, Pasal and Obol. Anonymous. Computers are useless. They can only give you answers. P. Picasso.
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