Quadtree Demo Files

System requirements:
----------------------

Minimum Operating system:   Windows XP SP3
Minimum OpenGL version:     3.1

In case of an OpenGL error please update your graphics card drivers. 

Alternatively perform the following steps to use Mesa software rendering:

1.	Copy the file "opengl32.dll" from the MesaGL subfolder to the folder 
	where the file "QuadtreeDemo.exe" is located.
2.	Restart the demo.

Build instructions:
----------------------

The project should compile and link in Visual Studio 2005 and later.
Project and solution files are provided for VS 2005 and VS 2017. 
Parts of the source code depend on Microsoft's WIN32/ATL libraries.


Change log:
-------------

v2.34 - 2018-12-02

+	Added generic message box dialog.
!	Fixed a bug in input value validation.

v2.33 - 2018-10-14

!	Bugfix and maintenance release.

v2.32 - 2018-09-22

+	Added button to switch to mesa software rendering in case of an error.

v2.31 - 2018-04-14

+	Added MesaGL software driver to setup package. 

v2.30 - 2018-04-01

+	Changed file format to wavefront obj.
+	Added option to run demo with Mesa software driver.
+	Added spin controls for edit fields.
!	Optimized program behavior when high dpi seetings are encountered.

v2.26 - 2018-02-03

+	Added Visual Studio 2017 solution and project files.
!	Maintenance release with some bug fixes and code optimizations.

v2.25 - 2017-01-22

!	Redesigned info dialog.
!	Refactored source code by moving functionality into new classes.

v2.2 - 2015-05-30

+	Added Snapping mechanism for info dialog.
+	Different dialog sizes can be set in Help dialog.
+	Regions not adhering to quadtree parameters are highlighted in orange.
+	Added quadtree statistics.
+	Bounding box of mesh is displayed.  
+	Extended mesh info with length and width values of mesh.

v2.1 - 2015-04-06

+	Quadtree properties and camera position are saved for each mesh separately
	in a directory named "userdat".

v2.0 - 2015-03-29

+	Ported the program to OpenGL v3.1 with Shader support. Deprecated OpenGL
	functions have been replaced by the ones from The OpenGL Mathematics 
	library (GLM).
!	The apply button now behaves sensitively to edit field input by users.

v1.9 - 2014-02-19

+	Added relevant tree search statistics.
+ 	Quadtree creation can be parametrized by percentage of total number
	of triangles per region.

v1.8 - 2014-01-26 

+	Current search- and camera positions are saved when closing the program.

v1.7 - 2014-01-02 

+	Added partial UTF 16 unicode support. For example file names
	containing russian characters can be read. Freeglut itself
	does not support unicode.   
+	Last opened file and current quadtree settings are saved for
	later reuse.
+	Glut window positions and dimensions are saved as well.
+	Info dialog now follows glut window movement. 
!	A modified freeglut.dll is delivered.

v1.6 - 2013-11-17 

+	Added shortcut Shift+A for reset view function.
!	Updated to freeglut v2.8.1 with improved mouse wheel operation.

v1.5 - 2013-11-10 

!	Fine-tuned keyboard and mouse navigation for smoother operation.

v1.4 - 2013-10-27 

+	Added reset button for view.
!	Fixed minor display error when triangles of a region are highlighted.	

v1.3 - 2013-01-03 

!	Optimized property value input via keyboard. 
!	Fixed special case in which the quadtree algorithm didn't work.
	(Happened as soon as a quadtree region was completely inside a triangle.)	

v1.2 - 2012-07-11 

!	Fixed ctrl+tab between windows, resizing of OpenGL window and made 
	error messages modal.

v1.1 - 2012-04-29 

+ 	Added intersection tests for remaining bounding box axes. 
	This increases the accuracy when adding triangles to the correct region.