Perl:Flags with Lines Tutorial

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.

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.

• 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.

Image:Flaggreece.png

  for(int i=0;i<5;i++)
g.drawLine(0,20+i*80,600,20+i*80);

</hint>

There is a problem with this example

Seemingly the GD library being used here does not support drawing thick lines outside the drawing area as expected. If anyone can suggest how I might fix this problem (without resorting to polygons) I would appreciate it. ajcumming@gmail.com

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