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日期：2020-12-14 10:50

COMP3811: Computer Graphics

Coursework 2

Interactive Animated Scenes with OpenGL

Due Date: 22 December 2020, 5 pm

Marc de Kamps

November 9, 2020

Marking

This coursework is summative and counts towards your final mark for 70 % (total coursework counts

for 100 %)).

Submission Instruction and Note on Plagiarism

Submission should be done through the VLE by the due date. Submissions through the SSO will be

ignored and result in 0 marks. Your submission should be in a single tar file that contains a report

and source code. Ideally, source should must be provided with a Makefile and must compile and

run on feng-linux. Where this is not possible, you should record a video demonstrating aspects

of your coursework, and be prepared to provide a demo, showcasing your solution.

The report is basis for assessment, with the source code as supporting evidence for assertions

made in the report. Answer all the questions and provide the explanations that are asked for. Refer

to your code in explanations, but do not provide answers like: ’see source code’.

You are allowed to discuss ideas with colleagues. You must program independently and not base

your submission on any other code than was provided during the tutorials, and textures which are in

a tar file called textures.tar, which is located in the coursework 2 folder on the VLE, the same

folder which contains this specification. Changing variable names in someone else’s code is not a

good idea.

Creation of an Interactive Animated Scene using OpenGL

Using Qt’s QGLWidget you will create an application that demonstrates the ability to render visual

scenes using OpenGL. You are free, within some limits, to create a scene of your choice. Assessment

will be based on the sophistication of the scene and scene elements as well as possibilities for user

interaction. The scheme below sets out minimum requirements that must be met for grading in

certain bands. Grading within a band is assessed on: coding style and commenting, explanation of

the design choices and implementation in the report, and visual impact.

? 40%-50%: You must create a visual scene that demonstrates a reasonable complexity through

instancing. Examples could be a group of buildings, constructed from cubes, body shapes constructed

from cylinders and spheres and a combination thereof. Light and material properties

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must be chosen that allow specular and diffusive light contributions to be recognised. You are

allowed to use glut objects. The report must explain your design. Your scene must deviate

substantially from the simple scenes that were provided during the tutorials.

? 50%-60%: Your scene must fulfil all requirements for the 40 %-50 % band. Your scene must

contain at least one element of user interaction, for example, a slider to manipulate viewing

angles or a dialog box to set material or light properties.

? 60%-70%: Your scene must fulfil all requirements for the lower bands, as well as contain

an element of animation, for example rotating or spinning objects. The scene must contain

at least one convex object that you have constructed from polygons. The scene must contain

texture mapping. Some texture images will be provided in the tar file. They all must be used,

but you are free to add your own.

? 70%-100%: Your scene must fulfil all requirements for the lower bands and contain an object

that requires hierarchical modelling and displays motion in some of its parts. This object

itself must move in a circular path through the scene. You must use various elements of

user interaction, for example controls to set the radius or speed of the object, dialog boxes to

control material properties, etc. Interaction purely by mouse of keyboard does not qualify as

one of these elements. [35 marks]

Two prizes will be made available: one for the visually most striking application, and one for

the most garish one - preferably by design. Prize winners will be invited for coffee and cake of their

choice. Please bear in mind that we have seen quite a few solar systems by now. Space scenes must

be really striking to stand out.

[35 marks total]

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