===  Interactive Mesh Subdivision  ===

The process starts with a given polygonal mesh. A refinement scheme is then applied to this mesh. This process takes that mesh and subdivides it, creating new vertices and new faces. The positions of the new vertices in the mesh are computed based on the positions of nearby old vertices.

=== Youtube link ===

http://youtu.be/nHePQI5oMqs

=== Installation ===

Install free-glut libraries. To do the same, at terminal punch in

$apt-get install freeglut3-dev

=== List of files ===

loop_main.cpp
Utility.cpp
Utility.h
WingedEdge.cpp
Makefile

=== How to run ===

1. Open your termial. 

2. Move into the src directory.

3. Type: make

$ make

4. Type: ./output to fire up the window

$ ./output <ply-file name>


5. We have following features:

--Scaling--

Scaling is done using following keys   -

i – to scale up the scene
o – to  scale down the scene

--Translation--

Translation is done using following keys   -

w – to translate upward
s – to translate to translate downward
a – to translate to left side
d – to translate to ride side 

--Rotation--

Hover your mouse curser, on the window opened. 
Click and hold right-button on your mouse and drag the mouse around, you will be able to see the rotation of the mesh.

6. Punch '+' to subdivide the mesh.

7. Hit 'e' to view the control mesh. On the control mesh hit 'n' to select the vertex to move around. Vertex is hightlighed by a filled square around.
NOTE: Translation, scaling and zooming will be disabled in the 'e' aka., edit mode. 

7. On a selected vertex by hitting 'n', we can move the vertex using 

'w' to move upwards
's' to move downwards
'd' to move right
'a' to move left.

NOTE: We can see the subdivision mesh autoUpdating.

=== ScreenShots ===

ScreenShots are avaliable in the screenshots folder.

=== References/help ===

1. Interactive Computer Graphics - A Top-Down Approach Using OpenGL by Edward Angel
2. www.stackoverflow.com
3. www.opengl.org
4. Tutorials of openGL on www.youtube.com