Noise Functions

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• Perlin Noise
• SImplex Noise

These functions can be used to attain random terrain heights.

These functions can be used to attain random object placement.

Placing objects under a noise function can be thought of as a generator to the editor user.

Placing objects under a noise function can be thought of a test unit for the developer.

Greatly reduces labour

Placement of objects can be restricted to levels of the terrain.

Rocks on all levels
Trees on rough
grass on rough
grass on grass
Seaweed on seabed

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Review
https://github.com/josephg/noisejs

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Coding concept

• Dedicated Buffer / Memory
• Precalculated Noise array
• Speeds up the calling since its already created and ready to go.

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Perlin Object Placement in Unity for a quick example.

PerlinCubes.cs

Add some objects to the GameObject Array.

An empty game object prefab can be used here as well.

PerlinCubes.cs.zip

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HeightMap Layers Legend for object placement

• Snow - No Objects
• Mountain - Rocks Boulders - Randomly rolled around all three axis Randomly scaled
• Rough = Grass / Bush / Trees
• Grass - No Objects this is considered 'fairway' and will have obstacles place by hand
• Sand - Rocks Boulders - Randomly rolled around all three axis like a zen garden
• Seabed - seaweed - grass for now if you want to work with opacity on the water.

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another noise call can now place objects within the sub layers

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Checker Patterns for the grass layer to mimic mowed fairways