COM4503编程代写、代写Python，C++程序

日期：2022-01-10 11:04

COM4503/COM6503: 3D Computer

Graphics

Assignment 2: Rendering effects (60%)

1. Introduction

Look around you. When you look at the real

world, can you see computer graphics rendering

challenges? How would you render the objects in

terms of patterns of colour and lighting? What

techniques would you use? This is what you will

consider in this assignment.

Your task is to write a report that contrasts the use

of a rasterization-based approach using a z-buffer

with the approach known as path tracing when

producing computer graphics images that

simulate real world effects. To limit the coverage,

you will choose only three effects. You must

choose one effect from list A and two effects from

list B to discuss:

List A: patterns of surface colour, shiny

reflections in surfaces;

List B: shadows, atmospheric effects (e.g. light

scattering), caustics, depth of field.

A particular requirement is that you will make use

of three photographs that you will take to illustrate

and individualise your report – no-one else will

take the same three photographs as you. More

details on this are given in section 2.

2. The report

Structure

The report should start with a general introduction

to the topic and what your report will cover. This

should be followed by some further sections that

structure the parts of your report. It is your

decision what sections you will use to structure

the report and what the order of these sections

should be – this must be explained as part of the

introduction to the report.

You should consider introducing the two

rendering approaches you are comparing and

contrasting before you consider the real-world

effects you choose. The initial description of the

rasterization based approach should be brief as

this has been covered in detail in lectures. The

description of ‘path tracing’ will need a little more

detail. This means you will have to do some

research and cite some references for a description

of path tracing. Make sure you use illustrations to

reduce the amount of text you write here.

However, it is the comparison and contrast

between the two rendering approaches when they

are used to produce the chosen real-world effects

that is the main focus of the report – this is where

you should spend most of your effort and most of

your writing. Make sure that you describe how

each of the real-world effects you choose could be

simulated using the two rendering approaches and

what the advantages and disadvantages of each

rendering approach are. (For rasterisation, you

will have to think carefully about whether or not

the particular real-world effect can be simulated.)

The report should finish with a conclusions

section where you summarise the main points of

the report.

Illustrations

These are an important part of the assignment and

can come from a range of sources: photographs,

screenshots from assignment 1, illustrations you

make, general illustrations from the internet.

Photographs: A particular requirement is that you

must make use of three photographs that you must

take to illustrate and individualise your report –

no-one else will take the same three photographs

as you. You might take a picture of your desk, or

a part of a kitchen, or part of a space in the

Diamond, or wherever else you can think of.

These photographs must be used to illustrate the

real-world effects you choose. As an example, if

you choose shadows as one of the things to

discuss, then one of your photographs should have

some good shadow effects in the picture. Choose

your photographs carefully as they must serve the

arguments that you make in your report.

Remember, whilst you may start with photographs

of three different scenes, if the resolution is good

enough, you can always zoom in on one part of a

photograph to produce a further illustration for the

report.

Screenshots from Assignment 1: These should be

used to illustrate your report (possibly zooming in

on relevant areas of the screenshots). As an

example, the lighting used in Assignment 1 was

limited. It failed to capture many real-world

lighting effects. So, you could use a screenshot to

show what a picture looks like without shadows

and discuss the impact that makes on the result.

One of your photographs might even look a little

like the scene in Assignment 1 to support your

discussions.

Making an illustration: You could choose to use

some computer graphics tools (e.g. Unity or

Blender or some other tools that are free for

personal use) to produce some illustrations to help

explain things in your report.

General illustrations from the internet: You must

check the copyright permissions before you use

any illustrations from the internet.

Decisions and skills

As part of the assignment, you will need to make

decisions about what should be presented, make

decisions about the ordering of information,

decide what should be assumed and what should

be explained (you can assume I know about my

lecture notes – as an example, there is no need to

explain the workings of a rasterization based

rendering approach in detail; a brief summary

using a diagram would suffice), link to reliable

information sources, and use appropriate language

in your report. You are finding, understanding,

filtering, organising and presenting information.

You are demonstrating that you can summarise

and appraise information about computer

graphics.

References

I expect to see at least 3 published research papers

in your reference list, as well as other kinds of

reference, e.g. online materials. Google Scholar

(https://scholar.google.com) is a good place to

search for academic papers.

3. Deliverables

The report should be between 2000 and 4000

words. This total does not include the list of

references and the figure captions. You may

include as many pictures as you deem

appropriate.

You should submit the report via Blackboard

as a pdf document.

You must include the following statement at

the start of the report:

/* I declare that this work is my own.

Author: < name >, < email address > */

4. Marking

The following aspects will be considered:

Coverage of the topic area and relevance of

material – Is the material included relevant? Is

there evidence of independent reading to find

advanced/interesting information for the

report? Are the references good?

Knowledge and understanding of relevant

material – Do you demonstrate knowledge

and understanding of what you are writing

about? Is deeper understanding demonstrated

by comparing and contrasting ideas? Is your

information accurate, or is some of the

material misleading or even incorrect,

demonstrating that you don’t understand it?

Organisation, clarity of expression and

diagrams – Is the report tidy and organised,

with a good flow of information? Are all

points in the writing expressed clearly and

succinctly, and supported with the use of

diagrams? Good use of illustrations –

photographs, screenshots from Assignment 1,

other illustrations. All diagrams should have a

figure number and a caption and be referred to

from the main text.