Vector Graphics - Yr 2 Only

Overview

https://www.youtube.com/watch?v=dSNO6ToqRQE&list=PLCiOXwirraUBIKvhutnNnMkVTpQ_psPN2

TRC PowerPoint

Vector Graphics

Definition

Images created by using vector points, lines, and shapes.

These can be assigned a colour for the Stroke (outline) and the Fill (inside).

A vector can be scaled mathematically so no image quality is lost.

Compared with BitMap

Bitmaps are stored pixel by pixel However, in a vector graphic the image is stored by calculating the points, lines and shapes used to create the image. A drawing list is created to recreate the image. Vector graphics can be resized using mathematics so increasing the size has no effect on quality of the image.

The file size of a vector graphic can be significantly smaller than a bitmap. the drawing list is essentially the instructions to rebuild the image. However if you attempted to capture a real world photograph, you would essentially have so many shapes to represent the changes in colour that the file size might not be any smaller.

Vector Data Structure

A vector is one of the abstract data structures covered in year 2 (link to page: Vectors ).

Revision Questions

try to add questions on:

• what is vector graphics
• drawing lists

Point added for a correct answer:
Points for a wrong answer:
Ignore the questions' coefficients:

1. What are vector graphics?

	Vector graphics are computer graphics images that are defined in terms of 2D points.
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	A series of connecting lines that form a shape(s).
→	incorrect do more revision
	Video editing software.
→	incorrect do more revision
	A way of representing the resolution of an image.
→	incorrect do more revision

2. what are drawing lists?

	The list of images that the vector graphics have to create.
→	incorrect do more revision
	The list of information needed to create the image accurately.
→	correct
	The less accurate predecessor of vector graphics.
→	incorrect do more revision

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• benefits of using vector graphics