Drawing a checker board pattern quickly with AS3
June 1, 2011 ~ Posted to ActionScript, Flash
Today I needed to dynamically generate a checker board pattern in ActionScript 3. I couldn’t find any examples on how to do it so I made my own. Below is a snippet of code I wrote to draw it and its super fast! I used bitwise operators in the loops to speed it up and it can draw a 2000x2000px area in 10 milliseconds.
// Box colour 1
var even:uint = 0xCCCCCC;
// Box colour 2
var odd:uint = 0x999999;
// Box size
var size:int = 10;
// number of boxes horizontally
var nH:int = stage.stageWidth / size;
// number of boxes vertically
var nV:int = stage.stageHeight / size;
// vars to be used in the loops
var clr:uint;
var i:uint;
var j:uint;
// loop vertical
for (i=0;i<nV;++i)
{
// Flip values of Even and Odd colours using Bitwise operations
even ^= odd;
odd ^= even;
even ^= odd;
// loop horizontal
for (j=0;j<nH;++j)
{
//bitwise modulus
//check if column is odd or even, then set colour
clr = j & 1 ? even : odd;
// draw box with previously set colour
graphics.beginFill(clr,1);
graphics.drawRect(Number(j*size),Number(i*size),size,size);
graphics.endFill();
}
}
var even:uint = 0xCCCCCC;
// Box colour 2
var odd:uint = 0x999999;
// Box size
var size:int = 10;
// number of boxes horizontally
var nH:int = stage.stageWidth / size;
// number of boxes vertically
var nV:int = stage.stageHeight / size;
// vars to be used in the loops
var clr:uint;
var i:uint;
var j:uint;
// loop vertical
for (i=0;i<nV;++i)
{
// Flip values of Even and Odd colours using Bitwise operations
even ^= odd;
odd ^= even;
even ^= odd;
// loop horizontal
for (j=0;j<nH;++j)
{
//bitwise modulus
//check if column is odd or even, then set colour
clr = j & 1 ? even : odd;
// draw box with previously set colour
graphics.beginFill(clr,1);
graphics.drawRect(Number(j*size),Number(i*size),size,size);
graphics.endFill();
}
}
Thank for for that code..
sir can you help me more on how to make actionscript for checkers game some legal move of that.. i dont know where do i start.