Creating an Optimized Post-Retro Game - The Essential Guide to Flash Games - page 549

2. Next, we enlarge and move the symbol to the center of the backgroundBitmapData with

a scale and translate matrix.

3. We draw a rectangle box around the entire backgroundBitmapData to give it a thin

border.

4. We draw 800 random blue stars (single pixels) to the backgroundBitmapData .
Now, we will take a look at the MineManager class function, createLevelMines . This function
creates a certain number of Mine class instances based on the level value:
public function createLevelMines(spriteGlowFilter:GlowFilter,level:int,

levelColor:uint):void{

//*** Mines look
mineBitmapData= new BitmapData(32, 32, true, 0x00000000);
var tempBlitArrayAsset:BlitArrayAsset = new BlitArrayAsset();
drawingCanvas.graphics.clear();

drawingCanvas.graphics.lineStyle(2, 0xffffff);
drawingCanvas.graphics.moveTo(6, 6);
drawingCanvas.graphics.lineTo(25, 6);
drawingCanvas.graphics.lineTo(25, 22);
drawingCanvas.graphics.lineTo(6, 22);
drawingCanvas.graphics.lineTo(6, 6);
drawingCanvas.graphics.moveTo(18, 8);
drawingCanvas.graphics.lineTo(18, 16);
drawingCanvas.graphics.lineTo(12, 16);
drawingCanvas.graphics.lineTo(12, 12);
drawingCanvas.graphics.moveTo(9, 23);
drawingCanvas.graphics.lineTo(9, 25);
drawingCanvas.graphics.moveTo(15, 23);
drawingCanvas.graphics.lineTo(15, 25);
drawingCanvas.graphics.moveTo(21, 23);
drawingCanvas.graphics.lineTo(21, 25);

spriteGlowFilter.color = levelColor;
mineBitmapData.draw(drawingCanvas);

mineBitmapData.applyFilter(mineBitmapData, mineBitmapData.rect, point0,

spriteGlowFilter);
tempBlitArrayAsset = new BlitArrayAsset();

mineAnimationFrames=tempBlitArrayAsset.createRotationBlitArrayFromBD
(mineBitmapData, 1,90);

//*** end look

//create mines for the level
mines = [];

for (var ctr:int=0;ctr<30+20*level;ctr++) {

var tempMine:Mine=new Mine(13,787,13,787);