FUNDAMENTALS OF COMPUTER GRAPHICS - PROJECT 3 REPORT
Author: Valentin KAO valentin.kao@epitech.eu 张有请 - 2017280242
The purpose of this project is to implement an OpenGl program in which there is a textured Bezier surface with 25 control points (5 per lines) and you can change the smoothness of the surface;
The video capture of my program named screenrecord.mp4, is available from the root of the folder.
• GCC 5 or later • CMake 3.9 or later • OpenGL, GLUT and SOIL libraries. The code hasn't been tested on Windows but should work on Visual Studio 2015 and later.
From the folder in which you found this report, please enter the following command lines.
-
mkdir build && cd build -
cmake .. -
make
Once the compilated was successful, you can execute the program. Here is the usage of the program.
./assignment4 [--width=x] [--height=y] [--title=”Assignment 4]
width, w Set the width of the window 900 height, h Set the height of the window 900 title, t Set the title of the window “Assignment 4”
In order to implement future project easily, I define a simple application design. Those three classes are singletons avoiding any multiple instances.
Application - Graphical Core - Engine
By default, we set 5x5 coordinates of points in an array of GLfloat repre- senting the control points in static in the Class Engine. Then, we use the functions glMap2f, glMapGrid2f and glEvalMesh2 to display the Bezier Surface in the Update function.
The user can modify the positions of the control points and the options of glMap2f to change the smoothness of the Bezier surface.
By pressing the key ESC or the key Q, you close the program properly. By pressing the key H, it hides the help text. By pressing 1, the texture applied is the Tsinghua image. By pressing 2, the texture applied is the Dog image. BY pressing 0, it switches to the grid display or textured display. As said previously, the user can navigate into the array of points with the arrows of the keyboard, by default, the current point is the (0, 0) point.
By pressing Q, W or E. the user can increase the coordinate x, y or z of the point. By pressing A, S or D. the user can decrease the coordinate x, y or z of the point. By pressing R or T, the user can increase the smoothness of u or v. By pressing F or G, the user can decrease the smoothness of u or v.
Here is the array : 0 1 2 3 4 0 x . . . . 1 . . . . . 2 . . . . . 3 . . . . . 4 . . . . .