Assignment One: First date with OpenGL

CSCI 3260 Principles of Computer Graphics
Assignment One: First date with OpenGL

I. Introduction
This first programming assignment will introduce you to the OpenGL graphics programming interface and
programmable pipeline. In this programming assignment, you need to create a 3D scene with user interaction (see
the good examples in Fig. 1). The objective of this assignment is to apply your understanding of the computer
graphics basic concepts; get familiar with the OpenGL programming library and give you an introduction to the
programmable pipeline.
Fig. 1 Good examples of 3D scene by previous students.
Your goal is to design a 3D scene with user interaction. Specifically, in your scene, there must have a ground,
2D objects (e.g. arrow) and 3D objects (e.g. cube, tetrahedron) (see Fig. 2 as an example), and you should be
able to apply arbitrary transformations including translation, rotation, and scaling to them. The user should be
able to use the keyboard (and/or the mouse) to translate, rotate, and scale the object. The object color, window size,
window title and window background color are all up to you. In order to make your scene more realistic, you
should use the perspective projection instead of orthographic projection. You are recommended to draw objects
with indexing. Your 3D scene shall not be limited by the demo program.

Fig. 2 Basic requirements of assignment 1.
CSCI3260, Term 1 2019-2020, Programming Assignment #1
CSCI3260 Principles of Computer Graphics 2
II. Implementation Details
In this assignment package, we have provided you with two shader programs (i.e., VertexShaderCode.glsl &
FragmentShaderCode.glsl) and a template program (i.e., main.cpp) which include the necessary functions you are
going to use and callback functions in the GLUT interface toolkit. Use this template as the basis for your
implementation. You need to design your own function to process the keyboard events, and you should also submit
a file like readme.txt to specify the keyboard (and/or mouse) events you design in your program. Otherwise, the
mark for related items will be deducted.
All programs should meet reasonable programming standards: header comment, in-line comments, good
modularity, clear printout, and efficiency.
Basic Requirements:
1. OpenGL code should be written using programmable pipeline instead of fixed pipeline with OpenGL 2.0+;
2. Draw at least 2 geometric primitives (one must be 3D object) in the 3D scene and place them above a ground;
3. Ensure at least one object is drawn with indexing;
4. Create at least three kinds of keyboard and/or mouse events, such as rotation, translation and scaling;
5. Use perspective projection to draw the scene;
6. Enable depth test to realize occlusion;
Additional self-design requirements:
You are free to add objects, move them, organize them, and whatever you wish to make your scene interesting.
III. Grading Scheme
Your assignment will be graded by the following marking scheme:
Basic (80%) (e.g., Fig. 2)
Draw a ground, 2D objects and 3D objects 25%
At least one object is drawn with indexing 10%
At least three kinds of keyboard (and/or mouse) events 15%
Include three kinds of object transformations (rotation, translation, scaling) 15%
Perspective projection 10%
Depth test 5%
Advanced (20%) (e.g., Fig.1(right))
Complex and meaningful objects constructed by different primitives 10%
Interesting and creative interactions 10%
Total: 100%
Note: no grade will be given if the program is incomplete or fails compilation or using fixed pipeline.
CSCI3260, Term 1 2019-2020, Programming Assignment #1
CSCI3260 Principles of Computer Graphics 3
IV. Guidelines to submit programming assignments
1) You are suggested to write your programs on Windows, since there will be enough technical support. If you
developed the program in other platforms, you may have to show your demo to tutor in person if your codes
cannot be compiled successfully under Windows system.
2) Modify the provided main.cpp & VertexShaderCode.glsl & FragmentShaderCode.glsl, and provide all your
code in this file. It is not recommended to create or use other additional .cpp or .h files. Type your full name
and student ID in main.cpp. Missing such essential information will lead to mark deduction (up to 10
points).
3) We only accept OpenGL code written in programmable pipeline. No points will be given if your solution is
written in fixed pipeline.
4) Zip the source code file (i.e. main.cpp & VertexShaderCode.glsl & FragmentShaderCode.glsl), the executable
file (i.e., openGL.exe), and the readme file (i.e., readme.txt) in a .zip. Name it with your own student id (e.g.
1155012345.zip).
5) Submit your assignment via eLearn Blackboard. (https://blackboard.cuhk.edu.hk)
6) Please submit your assignment before 11:59 p.m. of the due date. In case of multiple submissions, only
the latest one will be considered. Late submission will be penalized by 5 points deduction per day. Late
submission after two weeks past deadline will not be accepted..
7) Fail the course if you copy.