# Foundations of Computer Science - Tick Errata

2008–09

**Latest version of ML Tick 6**

Errata

- The submission date should read Wednesday 14th January 2009
- When scaling the co-ordinate system a single value is used to specify both the width and the height of the square. This means that unless your output image is square the rendering will have an aspect ratio distortion. You may rectify this if you wish but it is acceptable to complete the tick as written. (Thanks to Sebastian).
- In part 7 you are given 256 as the multiplicative factor - it should be 255 (thus giving a total of 256 different values). Again, it is acceptable to fix this in your submission or to complete the tick as written. (Thanks to Rhodri).