nadar71’s gists

nadar71 / circlelib.lua

Created January 26, 2017 12:19 — forked from HoraceBury/circlelib.lua

Create a portion of a fill or unfilled circle as a polygon and move it by it's circle-centre. Requires image: http://content.screencast.com/users/HoraceBury/folders/Default/media/18ea951e-71a1-44f4-a148-f2109a1c9059/brush2.png Download full solution: https://www.dropbox.com/s/8472upw9w2cwkwi/CircleLib.2015-12-02.001.zip?dl=0

	-- circle lib

	require("mathlib")
	display.setDefault( "isAnchorClamped", false )

	local min, max = -10000000000000, 10000000000000

	local cache = {}

	local circlelib = {}

nadar71 / dragitemscrollview.lua

Created January 26, 2017 12:17 — forked from HoraceBury/dragitemscrollview.lua

Provides a scrollview widget which can have items dragged off it.

	local widget = require("widget")

	local function angleOf( ax, ay, bx, by, adjust, positive )
	local angle = math.atan2( by-ay, bx-ax ) * 180/math.pi

	if (adjust) then
	if (type(adjust) ~= "number") then adjust = -90 end
	angle = angle - adjust
	if (angle < -180) then angle=angle+360 end
	if (angle > 180) then angle=angle-360 end

nadar71 / wordz.lua

Created October 7, 2016 08:52 — forked from jstrahan/wordz.lua

wordz.lua is used to check for acceptable words for word games like scrabble and others.

This file has been truncated, but you can view the full file.

	local M = {}
	local wordz = {}
	wordz[1] = nil
	wordz[2] = { 'aa','ab','ad','ae','ag','ah','ai','al','am','an','ar','as','at','aw','ax','ay','ba','be','bi','bo','by','de','do','ed','ef','eh','el','em','en','er','es','et','ex','fa','go','ha','he','hi','hm','ho','id','if','in','is','it','jo','ka','la','li','lo','ma','me','mi','mm','mo','mu','my','na','ne','no','nu','od','oe','of','oh','om','on','op','or','os','ow','ox','oy','pa','pe','pi','re','sh','si','so','ta','ti','to','uh','um','un','up','us','ut','we','wo','xi','xu','ya','ye','yo' }
	wordz[3] = { 'aah','aal','aas','aba','abo','abs','aby','ace','act','add','ado','ads','adz','aff','aft','aga','age','ago','aha','aid','ail','aim','ain','air','ais','ait','ala','alb','ale','all','alp','als','alt','ama','ami','amp','amu','ana','and','ane','ani','ant','any','ape','apt','arb','arc','are','arf','ark','arm','ars','art','ash','ask','asp','ass','ate','att','auk','ava','ave','avo','awa','awe','awl','awn','axe','aye','ays','azo','baa','bad','bag','bah','

nadar71 / colorTransition.lua

Created October 7, 2016 08:48 — forked from rdaniel0/colorTransition.lua

A colour transition function for CoronaSDK in lua

	function TransitionColor(displayObj, params)
	if(params and params.startColor and params.endColor) then
	local length = params.time or 300

	local startTime = system.getTimer()

	local easingFunc = params.transition or easing.linear
	local function colorInterpolate(a,b,i,t)
	colourTable = {
	easingFunc(i,t,a[1],b[1]-a[1]),

nadar71 / starfield_effect.lua

Created October 7, 2016 08:45

	local function makeGenerator()

	local kernel = {
	category = "generator",
	name = "stars",
	isTimeDependent = false
	}

	kernel.vertexData = {
	{

nadar71 / simple drag and rotate demo.lua

Created October 7, 2016 08:20 — forked from HoraceBury/simple drag and rotate demo.lua

This code was an answer to a forum question asking for a touch to drag an object but a tap-touch to rotate the object. I kept it simple and without reference to my mathlib.lua for the sake of brevity.

	local function angleOnTarget( e )
	local a = math.atan2( e.y-e.target.y, e.x-e.target.x ) * 180 / (4*math.atan(1))
	if (a<0) then a=a+360 end
	return a
	end

	local function tap(e)
	e.target.touchMode = "drag"
	print("drag mode")
	e.target.dragtimer = timer.performWithDelay( 400, function()

nadar71 / flood.lua

Created October 7, 2016 08:18 — forked from HoraceBury/flood.lua

Flood fill a display object with a Gfx2.0 gradient fill. Can be used to provide the Android Material Design button interaction animation, eg: http://www.google.com/design/spec/components/buttons.html#buttons-flat-raised-buttons

	-- ref: http://docs.coronalabs.com/daily/guide/graphics/effects.html#generator.radialgradient

	local back, outer, inner = {0,1,0,1}, {0,.9,0,.05}, {0,1,0,.05}

	-- backing colour rect
	display.newRect( display.actualCenterX.5, display.actualContentHeight.25, 220, 220 ).fill = back
	-- radial fill rect
	local r = display.newRect( display.actualCenterX.5, display.actualContentHeight.25, 200, 200 )

	local function getRadius( r, xOffset, yOffset )

nadar71 / shadow.lua

Created July 8, 2016 07:56 — forked from HoraceBury/shadow.lua

Create a drop shadow

	local function shadow( width, height, size )
	local g = display.newGroup()
	g.x, g.y = display.contentCenterX, display.contentCenterY

	display.newRect( g, 0, 0, width+size, height+size ).fill = {1,1,1,0}
	display.newRect( g, 0, 0, width, height ).fill = {0,0,0}

	local c = display.capture( g )
	g = display.remove( g )

nadar71 / countdowntimer.lua

Last active August 29, 2015 14:20 — forked from coronarob/countdowntimer.lua

	display.setDefault("background", 0.2, 0.2, 0.4 )

	-- Keep track of time in seconds
	local secondsLeft = 20 * 60 -- 20 minutes * 60 seconds

	local clockText = display.newText("20:00", display.contentCenterX, 80, native.systemFontBold, 80)
	clockText:setFillColor( 0.7, 0.7, 1 )

	local function updateTime()
	-- decrement the number of seconds

nadar71 / main.lua

Last active August 29, 2015 14:17 — forked from HoraceBury/drawPolygonMain.lua

	-- polygon concave test

	require("mathlib")

	stage = display.getCurrentStage()

	local text = display.newText{ text="- - -", x=display.contentCenterX, y=100, fontSize=24 }

	lines = display.newGroup()
	lines:insert(display.newGroup())

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