OpenGL Programming Assignment 06

This practical assignment involves converting a previous assignment (Assignment 05) to utilize OpenGL for 3D graphics rendering. Students are tasked with reading camera information from a "cameras_06.txt" file, which defines multiple cameras with varying parameters like eye position, look-at point, view-up vector, and view volume. The assignment requires implementing keyboard controls for various transformations, including rotation around X, Y, and Z axes, scaling, and moving the camera. Students must handle parallel and perspective projections, switching between them using keyboard input. Bonus points are awarded for implementing Tkinter interactive buttons. The assignment emphasizes practical application of OpenGL concepts and 3D transformations.

DUE DATE: Nov. 19, 2017
Purpose: Practice in OpenGL.
Convert your assignment 05 program to use OpenGL (You MUST use OpenGL
for this assignment).
When you start your program it should automatically read a file called
"cameras_06.txt". This file contains the information about cameras.
Notes:
 "cameras_06.txt' file may include information about multiple cameras.
 The format of "cameras_06.txt" is different from the previous
assignment.
Detail format for the "cameras_05.txt" file:
c // Start the definition of a new camera.
i camera_name //Name of the camera. Default=""
t Parallel / Perspective // Define camera type. Default= parallel
e <x> <y><z> //Define Eye (WC)
l <x> <y><z> //Define Look at point (WC)
u <x> <y><z> //Define VUP (WC)
w <umin><umax><vmin><vnax><nmin><nmax> //Define View Volume
(VRC). Default= -1 , 1, -1, 1, -1, 1
s <xmin><ymin><xmax><ymax. //Define viewport (normalized
coordinates). Default=0.1, 0.1, 0.9, 0.9
Since using Tkinter with OpenGL is complicated, This assignment does not
require that you create interactive buttons or menu items. All commands
may be performed by key strokes. You will get an extra 20 points if you
implement Tkinter interactive buttons in the same window with OpenGL.
Commands for this lab include:
 Input File Name:
This command loads all the data and parameters from a text file. Hitting the
"n" key should prompt the user for the name of the file. (The default value
for the file name should be "pyramid_05.txt")
 Load and Display:
This command should load and display the input file. Hitting the "d" key
should load the input file and and redisplay all the viewports. Notice that this
command should reload the "cameras_05.txt" file and reset all the viewing
coordinates.

 Rotate: "x" and "X" keys
Hitting the "x" key should rotate all the objects around the world
coordinate x axis by 5 degrees.
Hitting the "X" key should rotate all the objects around the world coordinate
x axis by -5 degrees.
 Rotate: "y" and "Y" keys
Hitting the "y" key should rotate all the objects around the world
coordinate y axis by 5 degrees.
Hitting the "Y" key should rotate all the objects around the world coordinate
y axis by -5 degrees.
 Rotate: "z" and "Z" keys
Hitting the "z" key should rotate all the objects around the world
coordinate z axis by 5 degrees.
Hitting the "Z" key should rotate all the objects around the world coordinate
z axis by -5 degrees.
 Scale: "s" and "S" keys
Hitting the "s" key should scale all the objects by 1.05.
Hitting the "S" key should scale all objects by 1/1.05
 Move forward or backward: "f" and "b" keys
Hitting the "f" Key should move the eye toward the Look at point by
0.05/1.05 of the distance between the eye and look at point.
Hitting the "b" Key should move the eye away from the Look at point by 0.05
of the distance between the eye and look at point.
 Move left or right:
Hitting the "left arrow" Key should move the eye in the positive direction of
the view coordinate u axis by 0.05 of the distance between the eye and look
at point.
Hitting the "right arrow" Key should move the eye in the negative direction of
the view coordinate u axis by 0.05 of the distance between the eye and look
at point.
 Move up or down:
Hitting the "up arrow" Key should move the eye in the positive direction of
the view coordinate v axis by 0.05 of the distance between the eye and look
at point.
Hitting the "down arrow" Key should move the eye in the negative direction
of the view coordinate v axis by 0.05 of the distance between the eye and
look at point.

 Change projection (Parallel /Perspective)
Hitting the "p" key should switch the views between parallel and perspective
projections for all the cameras.
Note:
The format of all the data files (except cameras_06.txt) in this assignment is
the same as the files in the assignmet_05