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

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• what is vector graphics
• drawing lists

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What are vector graphics?

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• benefits of using vector graphics