Tutorial 01 Flags, Page 02 Line

From Progzoo
Jump to: navigation, search

Interactive Programming Tutorials - Drawing flags using lines. You may want to look at: <a rref="../ht50Graphics/200Lines.xml">How to draw thick lines.</a>


The cross of St. Andrew shows diagonal lines on a blue background.

  • Complete the flag by drawing the other diagonal line.
  • The white lines should be slightly thicker - try 60.

<img src="/img/flagscotland.png"/>

[Font] [Default] [Show] [Resize] [History] [Profile]


The English flag is the cross of St. George. This is a red cross on a white background.

  • The line thickness should be 1/5 of the height of the flag.

<img src="/img/flagengland.png"/>

[Font] [Default] [Show] [Resize] [History] [Profile]


  • The flag of Greece has 5 blue stripes and 4 white stripes.
  • Each stripe has width 40.
  • Note that we let the computer do the arithmetic. Each stripe should be 80 pixels below the previous one.
  • The expression 20+i*80 - where i is 0, 1, 2, 3, 4 gives the height of the middle of each blue stripe.
  • The expression 60+i*80 - where i is 0, 1, 2, 3 gives the height of the middle of each white stripe.
  • You must include another two blue stripes and four white stripes.

<img src="/img/flaggreece.png" alt="Flag of Greece"/>


[Font] [Default] [Show] [Resize] [History] [Profile]

Trinidad and Tobago

We can start and end lines outside the confines of the surface.

<img src="/img/flagtrinidad.png" alt="Flag of Trinidad and Tobago"/>

[Font] [Default] [Show] [Resize] [History] [Profile]