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gretty

Member Since 27 Dec 2009
Offline Last Active Apr 10 2015 08:52 PM

Topics I've Started

How do you convert between Primitive Data Types?

10 April 2015 - 08:53 PM

Hello

 

How do you convert between primitive data types (limited only to STL) and why do you use that methodology/methodologies?

 

In my work environment we stick strictly to STL and typically use StringStream to convert between primitive data types. I am looking to hear how you do it and also for advice on more efficient/better methodologies to perform this conversion as I've heard StringStream can be slow? I am going to get into Embedded C++ so these expensive conversions will really start to matter.

 

I'm aware of atoi, atof, etc. but these only work for c strings apparently. Thanks in advance for your advice and feedback.


Correct Term For An Operating Systems Core API

04 September 2014 - 11:08 PM

Hello

 

What is the technical/correct term for the APIs: WinAPI, Cocoa, Linux-API/POSIX?

 

Would they be called/classified as:

  • Standard OS API's
  • Core API
  • Base API

 

What term do you use to refer to this group of API's? I dont think its enough to just refer to them as API's as they are more the foundation API of an Operating System - the pedestal/foundation with which all other API's of that OS are built. Whilst WxWidget and WinAPI are both API's; one is essentially a wrapper of the other and one is significantly easier to learn and use.


Is the BIOS Serial Number Always Set, Constant & Reliable

19 August 2014 - 07:23 PM

Hello

 

I am thinking of using the users BIOS/Motherboard Serial Number to uniquely identify a user (the application runs on Windows OS). When I refer to the BIOS/Motherboard Serial Number I am referring to the serial number returned when you type in: wmic BIOS get SerialNumber

 

I have previously attempted to use the Hard Drive serial number to uniquely identify a user but WMI is notoriously unreliable. For example; if you are running your .exe as an elevated process you will get a different Hard Drive serial number back from WMI. Also as crazy as this sounds, I have had 2 different Windows 8 machines change their Hard Drive serial no. on me when the Hard Drives were not changed at all - I'm not crazy this really happened - I realise there's no better way for people to think you're crazy than saying 'I'm not crazy' but putting that aside - do you know if I will experience these same issues with the BIOS/Motherboard' Serial Number?

 

Some queries

  • Can the user change this serial number? Either using third party applications or through Windows.
  • According to this forum post, not all vendors supply a motherboard UUID so I cannot use this to uniquely identify the user. Do venders mostly/always supply/fill out the BIOS/Motherboard Serial Number or will I also find some computers dont have a serial number?
  • I have tried to uniquely identify a user using the Hard Drive's Serial Number. But I have run into the issue that the serial number can change and that Windows API is unreliable and can return different values. Do you know if I may experience the same issue for the BIOS/Motherboard's Serial Number?
  • Can a standard process (Standard Windows User) retrieve the BIOS/Motherboard Serial Number? Or does the process need to be elevated (Admin User)?
  • What would happen if the user has a virtual machine?

Just to confirm the BIOS is the motherboard, correct? I am a little unclear because I thought the BIOS is the simple software installed on the motherboard.

 


Mobile Input Automatically Inverted

12 August 2014 - 09:09 PM

Hello

I am using TouchScript for my Unity3d game input - panning around a 3d environment. For some reason the Windows 8 Tablet input is inverted. Note when I run the app in the Unity3d Editor on my Windows 7 laptop the input is NOT inverted.

When I say inverted I mean:

 - By dragging your finger left the camera moves left. The vast majority of apps would move the camera right when the user drags left. This is how Bing Maps responds.
 - By dragging your finger up the camera moves up. The vast majority of apps would move the camera down when the user drags down.
 - Pinching fingers together zooms in the camera. When it should zoom out.

I haven't done anything that I know of the cause this inversion.

Setup:

 - GameObject 'CameraContainer' has the components: Transformer2d, FullScreenLayer, PanGesture, ScaleGesture, PressGesture.
 - GameObject 'MainCamera' is nested inside the 'CameraContainer' object and has the components: Camera.
 - GameObject 'TouchScript' has the components: TouchManager.
 - GameObject 'Input' is nested inside the 'TouchScript' object and has the components: MobileInput, MouseInput and Win8TouchInput.

Any ideas what has caused this and/or how I can invert the input controls?


Third Party Library That Can Perform Interpolations & Rotations

05 August 2014 - 11:30 PM

Hello

 

I am attempting to find a C# Third Party Mathematical library that can:

 

- Rotate individual and groups of 3d Vectors about a 3d Vector

- Interpolate/Lerp 3d vectors

 

I intend to use the third party application for a Civil Engineering application. Are you aware of any C# Third Party libraries that can perform these operations?

 

I have come across this library Math.NET Iridium, but Math is not my strong point, so I cant discern if the library meets my needs. By this I mean I am not sure which Mathematical operation/formula/function I would use to rotate 3d Vectors so I dont know what methods and functions I need to search Math.Net for. I can confirm that this library can perform interpolation.

 

Any advice would be greatly appreciated. Especially what Mathematical operation/formula/function I should use to rotate a 3d Vector on the Y Axis using another 3d Vector as the pivot point.


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