cipr.struct

Posted by cixate, Posted on January 29, 2012

0 votes
GitHub URL: 
https://github.com/six8/cipr.struct

Data structure utilities for Corona, part of the Cipr project.

Includes:

  • cipr.struct.grid.Grid - An efficient 2D grid
  • cipr.struct.grid.GridView - Translates a Grid into display coordinates
  • cipr.struct.Set - An unorderd set
  • cipr.struct.Vector2D - 2D vector operations

Installation

Installation is done with cipr

cipr install git://github.com/six8/cipr.struct.git

Usage

Some examples. See source for full functionality.

Set

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    local cipr = require 'cipr'
    local Set = cipr.import 'cipr.struct.Set'
   
    local fruit = Set:new({})
    fruit:add('orange')
    fruit:add('pear')
    fruit:add('apple')
 
    assert(fruit:contains('apple'))
 
    local cart = Set:new({'apple', 'plum', 'grape'})
 
    assert(cart:union(fruit):size() == 5)
    assert(cart:intersection(fruit):size() == 1)

Vector2D

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    local cipr = require 'cipr'
    local Vector2D = cipr.import 'cipr.struct.Vector2D'
 
    local vec1 = Vector2D:new(10, 10)
    local vec2 = Vector2D:new(10, 10)
 
    assert(vec1:equals(vec2))
 
 
    -- Distance
    assert(vec1:dist(vec2) == 0)
 
    -- Angle
    assert(vec1:angle({x = 0, y = 0}) == -45)