Comments for Greg Dolley's Weblog

Comment on Update: Quake 2 .NET Port with Visual Studio 2008 (v9.0) and Managed C++ by gregd1024

gregd1024 — Mon, 16 Jan 2012 05:05:57 +0000

Hey Nemo, yeah I’m alive! Just haven’t had time to fix those links. I got your email, so I’ll send you a zip file of the code.

-Greg Dolley

Comment on Update: Quake 2 .NET Port with Visual Studio 2008 (v9.0) and Managed C++ by Nemo

Nemo — Sat, 14 Jan 2012 12:35:05 +0000

Greg are you still alive bud? Can you pls fix the link? Don’t let all that awesome work die!

Comment on Update: Quake 3 Arena .NET Port is Done! by Nemo

Nemo — Mon, 02 Jan 2012 10:13:18 +0000

Greg can you please reupload this? I’d love to take look

Comment on DirectX 9 C++ Graphics Tutorial 1: Getting Started by YDLU

YDLU — Mon, 05 Dec 2011 18:29:40 +0000

source code link looklike broke!

Comment on Part 1: How to Make Native Calls from Managed Code in C++/CLI by Tomato Blog

Tomato Blog — Fri, 02 Dec 2011 23:18:40 +0000

Pass C++/CLI delegate as function pointer into native C++ class…

To Pass C++/CLI delegate as function pointer into native C++ class, you can make use of this .net method: System::Runtime::InteropServices::Marshal::GetFunctionPointerForDelegate, the key point is: define the delagate (MyDelegate^ m_myDelegate in my ex…

Comment on Managed DirectX C# Graphics Tutorial 1: Getting Started by ashton

ashton — Fri, 02 Dec 2011 02:30:45 +0000

private Device m_device = null; //Device says its missing reference ?

Comment on "Decimal" .NET Type vs. "Float" and "Double" C/C++ Type by ShariqShariq

ShariqShariq — Fri, 25 Nov 2011 15:46:50 +0000

> So if you’re writing a financial application for a bank that has to be 100% accurate and performance is not a consideration, use the Decimal type.

What does 100% accurate mean? To determine accuracy, you must also determine the precision. For example, if I divide 100 by 3 and state that the answer must be precise to the nearest integer (perhaps because my processor only supports this level of precision) then the answer is 33 and that’s 100% accurate.

However, if I specify my precision to 3dp, then the answer is 33.333 (again, 100% accurate).

A decimal type in C# has a precision of 28-29 significant figures (http://msdn.microsoft.com/en-us/library/364x0z75.aspx). The “actual” answer for 100/3 is 33 and an infinite number of 3′s after the decimal point. The decimal type will truncate this to 25-26 3′s. That’s not the actual answer, it’s an answer that’s 100% accurate to 25-26 decimal places.

So…

Go ahead and use doubles (ie floating point numbers) and convert to decimal at the end. Just don’t try comparing variables of type double with each other or you’ll enter a world of pain.

Comment on How to Charge Any USB Device with AA Batteries – Make Your Own Battery Pack!!! by Bob Fairlane

Bob Fairlane — Sat, 12 Nov 2011 06:39:57 +0000

I need to keep a cell phone charged and close in my house because I am a parent. I have some 12v 7AH SLA batteries I got cheap at a refurbished auto battery supply ($5 each) and simply put a 12v plug with slide connectors on one. I use the phone charger for a car. If the power goes out due to a storm or utilities services, I can keep a charged phone within range to hear it ring and bring it to any room.