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Froofy-D · 05-05-2008, 01:43 PM

In Java do Action Listeners give similar functionality to Delegates? I don't do much Java either besides what was required in some undergrad classes.

I've recently migrated from C++ to C# for all my personal and work projects when I can use it. I will NEVER go back to C++ ... C# is that much better.

BTW, I'm using Delegates to speed up some C# Neural Network code that must be executed 100's of time per frame in game. Each node in the network is assigned a random mathematical function, from out of approximately 15 functions. Each network has possibly dozens of nodes, and there are a lot of networks.

Instead of a switch of if-else at each node like this ...

Code:

switch(functionNumber)
{
        case 0: Sin();
        case 1: Cos();
        case 2: HyperbolicTangent();
        case 3: Inverse();
        case 4: Ramp();
        case 5: Step();
        case 6: Gaussian();
        case 7: Spike();
        case 8: Tangent();
        etc...
}

... each node gets assigned a Delegate called "functionPointer" that points to it's correct function. So the above switch statement within a node is replaced by simply:

Code:

node.functionPointer();

So, because nodes get activated 100's of times per frame, possibly thousands of 'switch' cases per frame are avoided, resulting in significant speedup.

05-05-2008, 01:43 PM	#140 (permalink)
Froofy-D upper management material Join Date: Nov 2002 Location: Orlando, FL Posts: 2,040 +8 Internets	In Java do Action Listeners give similar functionality to Delegates? I don't do much Java either besides what was required in some undergrad classes. I've recently migrated from C++ to C# for all my personal and work projects when I can use it. I will NEVER go back to C++ ... C# is that much better. BTW, I'm using Delegates to speed up some C# Neural Network code that must be executed 100's of time per frame in game. Each node in the network is assigned a random mathematical function, from out of approximately 15 functions. Each network has possibly dozens of nodes, and there are a lot of networks. Instead of a switch of if-else at each node like this ... Code: switch(functionNumber) { case 0: Sin(); case 1: Cos(); case 2: HyperbolicTangent(); case 3: Inverse(); case 4: Ramp(); case 5: Step(); case 6: Gaussian(); case 7: Spike(); case 8: Tangent(); etc... } ... each node gets assigned a Delegate called "functionPointer" that points to it's correct function. So the above switch statement within a node is replaced by simply: Code: node.functionPointer(); So, because nodes get activated 100's of times per frame, possibly thousands of 'switch' cases per frame are avoided, resulting in significant speedup.