Today, sine waves, the cool wiggly mathematical lines that are used to represent water and the paths of alien space craft.
Here's a small code snippet to show how to draw them. If, like me, you willfully ignored most of your secondary school math classes - if only they'd told my 13 year old self it was useful for making computer games!
C#:
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for (int i = 0; i <100; i++)
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{
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int x = i;
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int y = (int) (Math.Sin((double)i * 2.0 * Math.PI / (double)(99)) * 100);
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graphics.Shapes.DrawPoint(x, y);
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}
