Angelo is a procedural generation library written in pure Swift.

You can find more details about it here:

enzomaruffa/Angelo

Getting Started

Angelo currently has the following tools to assist you with procedural generation:

Weighted Lists

Weighted lists are lists in which each element has an associated weight with it. This allows the selection of random elements from the list, but increasing/decreasing the chance of a specific element to be selected.

In the example below, we create a list and add an element to it:

let list = WeightedList<Int>()
list.add(20) // Since we are not specifying a weight, the default is 1

Note that the list has a type associated with it, defined by the <Int> notation.

Now, let's add another element.

list.add(40) // Since we are not specifying a weight, the default is 1

If try to select an element by using list.randomElement(), we'll get either 20 or 40, each with 50% of chance.

let element = list.randomElement() // element has // 
																	 // 50% of chance of being 20 and
																	 // 50% of chance of being 40, 
																	 // since both  have the same weight (1)

Now, suppose we add another element with weight 2 and try to select another random element:

try? list.add(80, weight: 2)
let element = list.randomElement() // element has: 
																	 // 50% of chance of being 80 
																	 // 25% of chance of being 20 and
																	 // 25% of chance of being 40.

L-Systems