added the lua file

BetterLuaAPI.lua

@@ -0,0 +1,107 @@
+-- BetterLuaAPI for TI-Nspire
+-- Adriweb 2011
+-- Put all this in your code and thank me ;)
+
+function drawPoint(x, y)
+	platform.gc():setPen("thin", "smooth")
+	platform.gc():drawLine(x, y, x, y)
+end
+
+function drawCircle(x, y, diameter)
+	platform.gc():drawArc(x - diameter/2, y - diameter/2, diameter,diameter,0,360)
+end
+
+function drawCenteredString(str)
+	platform.gc():drawString(str, (platform.window:width() - platform.gc():getStringWidth(str)) / 2, platform.window:height() / 2, "middle")
+end
+
+function setColor(theColor)
+	theColor = string.lower(theColor)
+	platform.gc():setColorRGB(0,0,0) -- set black as default is nothing else valid is found
+	if theColor == "blue" then platform.gc():setColorRGB(0,0,255)
+	elseif theColor == "brown" then platform.gc():setColorRGB(165,42,42)
+	elseif theColor == "cyan" then platform.gc():setColorRGB(0,255,255)
+	elseif theColor == "darkblue" then platform.gc():setColorRGB(0,0,139)
+	elseif theColor == "darkred" then platform.gc():setColorRGB(139,0,0)
+	elseif theColor == "fuchsia" then platform.gc():setColorRGB(255,0,255)
+	elseif theColor == "gold" then platform.gc():setColorRGB(255,215,0)
+	elseif theColor == "gray" then platform.gc():setColorRGB(127,127,127)
+	elseif theColor == "green" then platform.gc():setColorRGB(0,128,0)
+	elseif theColor == "lightblue" then platform.gc():setColorRGB(173,216,230)
+	elseif theColor == "lightcyan" then platform.gc():setColorRGB(224,255,255)
+	elseif theColor == "lightgreen" then platform.gc():setColorRGB(144,238,144)
+	elseif theColor == "lightgrey" then platform.gc():setColorRGB(211,211,211)
+	elseif theColor == "lightpink" then platform.gc():setColorRGB(255,182,193)
+	elseif theColor == "lightseagreen" then platform.gc():setColorRGB(32,178,170)
+	elseif theColor == "lightyellow" then platform.gc():setColorRGB(255,255,224)
+	elseif theColor == "magenta" then platform.gc():setColorRGB(255,0,255)
+	elseif theColor == "maroon" then platform.gc():setColorRGB(128,0,0)
+	elseif theColor == "navyblue" then platform.gc():setColorRGB(159,175,223)
+	elseif theColor == "orange" then platform.gc():setColorRGB(255,165,0)
+	elseif theColor == "palegreen" then platform.gc():setColorRGB(152,251,152)
+	elseif theColor == "paleturquoise" then platform.gc():setColorRGB(175,238,238)
+	elseif theColor == "palevioletred" then platform.gc():setColorRGB(219,112,147)
+	elseif theColor == "pink" then platform.gc():setColorRGB(255,192,203)
+	elseif theColor == "purple" then platform.gc():setColorRGB(128,0,128)
+	elseif theColor == "red" then platform.gc():setColorRGB(255,0,0)
+	elseif theColor == "royalblue" then platform.gc():setColorRGB(65,105,225)
+	elseif theColor == "salmon" then platform.gc():setColorRGB(250,128,114)
+	elseif theColor == "seagreen" then platform.gc():setColorRGB(46,139,87)
+	elseif theColor == "silver" then platform.gc():setColorRGB(192,192,192)
+	elseif theColor == "turquoise" then platform.gc():setColorRGB(64,224,208)
+	elseif theColor == "violet" then platform.gc():setColorRGB(238,130,238)
+	elseif theColor == "white" then platform.gc():setColorRGB(255,255,255)
+	elseif theColor == "yellow" then platform.gc():setColorRGB(255,255,0)
+	end	
+end
+
+function verticalBar(x)
+	platform.gc():drawLine(x,1,x,platform.window:height())
+end
+
+function horizontalBar(y)
+	platform.gc():drawLine(1,y,platform.window:width(),y)
+end
+
+function drawSquare(x,y,l)
+	platform.gc():drawPolyLine({(x-l/2),(y-l/2), (x+l/2),(y-l/2), (x+l/2),(y+l/2), (x-l/2),(y+l/2), (x-l/2),(y-l/2)})
+end
+
+function on.paint(gc)
+
+	setColor("red")
+	drawPoint(50,50)
+	drawCircle(50,50,20)
+	drawSquare(200,120,30)
+	drawCenteredString("hello world")
+	drawCenteredString("\n  Adriweb here \\o/")
+	--drawRoundRect(x,y,w,h,r)
+	verticalBar(20)
+	horizontalBar(40)
+	gc:drawPolyLine({0,0, 0,100, 100,100, 100,0, 0,0}) 
+
+
+
+-- lignes http://i.imgur.com/YDcmH.jpg
+--for i=1,320,5 do
+--	gc:setColorRGB(math.random()*255,math.random()*255,math.random()*255)
+--	gc:drawLine(i,1,320,i)
+--	gc:drawLine(i,320,1,i)
+--	gc:drawLine(i,1,1,320-i)
+--	gc:drawLine(320-i,320,320,i)
+--	gc:drawLine(2,2,320,2)
+--end
+
+
+
+
+
+
+--	math.eval("x:=rand()")
+--	local err
+--	x = xpcall(var.recall("x"),err)
+--	print err
+--	print(x)
+
+
+end