U
NIT
16:
D
IGITAL
2D
AND
3D
G
RAPHICS
Pearson BTEC International Level 3 Qualifications in Information Technology –
Specification – Issue 3 – September 2022 © Pearson Education Limited 2022
225
Content
Learning aim A: Investigate the purpose and characteristics of digital
graphics that are an important part of visual communications
A1 Purpose of and legal requirements for digital graphics
The purpose and legal requirements for digital graphics.
•
The purpose of digital graphics is to:
o
convey information, messages and meaning to an
audience, including a target
market, customer and/or user
o
visualise, communicate, verify and evaluate potential ideas, solutions,
intentions, requirements and alternatives to an audience.
•
The current and relevant local legal requirements for digital graphics.
A2 Representation and applications of 2D and 3D digital graphics
The application and principles of 2D and 3D in digital graphics.
•
Two types of digital graphic, raster- and vector-based, and the differences
between them:
o
raster image principles
–
2D arrays
–
resolution, e.g. pixel and spatial
–
dimensions
–
sampling
–
bit depth
–
colour modes
o
applications of raster-based 2D images, including image compositing for
website graphics, print advertising, packaging and creating assets for
computer
games
o
vector image principles
–
geometrical primitives, including points, lines, curves, and polygons
–
nodes
–
paths
–
voxel
o
applications of vector-based 2D images, including user
interfaces, logos,
illustrations, buttons for interactive media products, icons, fonts, magazine
design and creating assets for computer games.
•
Principles and applications of representing 3D images in digital format,
including:
o
geometric theory
–
vertices
–
line
–
curve
–
edge
–
polygon
–
mesh, e.g. wireframe
–
coordinate geometry
–
mesh construction:
box modelling
extrusion modelling
primitives, e.g. cube, sphere
U
NIT
16:
D
IGITAL
2D
AND
3D
G
RAPHICS
Pearson BTEC International Level 3 Qualifications in Information Technology –
Specification – Issue 3 – September 2022 © Pearson Education Limited 2022
226
o
rendering
–
lighting
–
radiosity
–
ray tracing
–
pixel shading
–
level
of detail
–
rasterising, including scan conversion.
•
Applications of 3D images, including landscapes, architecture, objects and
characters for computer and video games, virtual reality, animation,
motion/broadcast graphics, simulations, visualisations and special effects.
•
Impact of the 2D and 3D digital graphic representation
principles on their
usability and accuracy, e.g. dimensions, scalability, colour management,
rasterising, rendering, quantisation, anti-aliasing.
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