# How do I Random Islands Generator

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### » Thu Mar 30, 2017 5:02 am

I wanted to know how to create a simple system for generating random islands.
Like this image, for example:

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### » Thu Mar 30, 2017 6:39 am

It is not so easy.
Two main approach is to use or a noise-based techniques or if you are more advanced - polygonal techniques.
this noises good for map generating.

You can can reed some useful stuff here:
http://www.redblobgames.com/articles/no ... ction.html
http://www.redblobgames.com/
http://www-cs-students.stanford.edu/~am ... eneration/

One way (and probably the most easy way) to implement it:
*Create two dimensional array the size of your map (lets say 2000 horizontally by 1000 vertically),
*Assign there random values (lets say from -10 to 20).
*Smooth the surface values: the stronger the smooth you will have less islands and but more pretty shapes, if weaker - more islands, more chaotic surfaces.
*One way to smooth the surface - make same size 2000x1000 array, and assign there values for each point as a average of a point and the 8 near points of the original array in the end copy the second array into the original, to get smoother surface - repeat the process multiple times.
*Determine that values from -10 to 0 it is water, 0 to 10 it is land, 10 to 20 is hills.
*Make function to show the surface of certain area.
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### » Thu Mar 30, 2017 12:19 pm

I would say it's easier than people think - but only once you've gotten your head around arrays! You might find one of my templates useful, or for inspiration you can try this demo I released on Scirra Arcade recently:

It's a bit broken, as you can't easily use multi-line displays on the Arcade - however, you can paste into the input panel on the left from your notepad of choice.
The LEVEL GENERATOR TOOLKIT

24 functions dedicated to producing randomly generated terrain for all kinds of games.
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