🔒 Locked

Programming optimizations

Started by Happy Thoughts Jun 9, 2002 at 2:07 PM 6 replies 400+ views

Original Post

Jun 9, 2002 at 2:07 PM

Does any body know what generates the fastest code in visual C++ 6.0 When you are optimizing a game so you use a vector classes or vector structs or can you program C++ classes to get the same speed as structs with inline functions. Any help on this topic would be great!

Gammastrahler

Jun 9, 2002 at 4:41 PM

i personally prefer vector classes implemented with C++.

i´ve noticed no performance drawbacks. try to avoid virtual methods that are called thousands or hundred thousands of times each frame.

and you should also avoid overloaded operators that return class structs.

use "call by reference" paramters whenever possible

IndirectX

Jun 9, 2002 at 4:43 PM

I personally use D3DX.

Happy Thoughts

Author

Happy Thoughts

Jun 10, 2002 at 9:17 AM

When I look at the Quake2 source code I notice ID uses structs not classes - Is this a hint to what to use?

ANSI2000

Jun 10, 2002 at 10:22 AM

Yeah and in Doom 3 carmack decided to go pure C++...

invective

Jun 10, 2002 at 11:41 AM

If you are targeting windows, save yourself a bunch of time and use the D3DX math lib that comes with DirectX 8.1. You can link in the math library without the rest of DX, and it has lots of matrix, vector and quaternion functions and associated overloaded operators. All the functions are also SIMD accelerated for both Intel and AMD processors.

Topic Locked

This topic has been locked by a moderator. New replies are not allowed.