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[英]Why does Actionscript displays different values for modulus of large values?
[英]Why do these changes in object.name result in different displays?
我正在做一些簡單的事情 - 繪制一系列瓷磚,將它們放在庫中並在屬性中鏈接,並創建一個由隨機選擇的瓷磚組成的大矩形。 我還希望能夠獨立訪問每個圖塊,因此我為每個圖塊使用了數組類型的命名系統。 然后我遇到了這種情況,如果我使用變量彼此相鄰的命名方案(而不是拆分他們用字符串文字)。
有人可以解釋為什么: floor.name = "floorR"+String(n)+"C"+String(m); //行為正常,如預期的那樣
給出不同的顯示結果: floor.name = "floorRC"+String(n)+String(m); //轉換為下面代碼中的注釋,往往會放錯瓷磚
在以下最低限度的、可重現的提取物中:
//initialize standard counters
var i:uint = 0;
var j:uint = 0;
var m:uint = 0;
var n:uint = 0;
var lvlAdd:uint = 0; //designates add level (display)
//starting location of tiles
var bigMapX0:uint = 15;
var bigMapY0:uint = 75;
//dimensions of completed tile set
var bigMapWidth:uint = 375;
var bigMapHeight:uint = 675;
//initialize max row and column
var rowMax = 25;
var columnMax = 15;
//initialize unit-cell dimensions
var cellWidth = bigMapWidth/columnMax;
var cellHeight = bigMapHeight/rowMax;
//backdrop rectangle: black
var backFieldColor = 0x000000;
var backField:Shape = new Shape();
backField.graphics.beginFill(backFieldColor);
backField.graphics.drawRect(bigMapX0,bigMapY0,bigMapWidth,bigMapHeight); //dimensions of standard stage
backField.graphics.endFill();
this.addChildAt(backField,lvlAdd); //sets black as bottommost static backdrop
//set down tiles
var floor:DisplayObject;
var floorName:DisplayObject;
for (m=0; m<columnMax; m++) {
for (n=0; n<rowMax; n++){
floor = new Floor0(); //"floor" is in the library with linkage named Floor0 (part of an assortment of tiles randomly chosen, and not shown here to reduce lines of code
//floor.name = "floorR"+String(n)+"C"+String(m);
floor.name = "floorRC"+String(n)+String(m); //error happens if this line is used instead of the commented line above it
lvlAdd++;
this.addChildAt(floor, lvlAdd);
//floorName = this.getChildByName("floorR"+String(n)+"C"+String(m));
floorName = this.getChildByName("floorRC"+String(n)+String(m)); //this is the paired statement with the floor.name 3 lines prior, and causes an error in display if used instead of the commented line above it
floorName.x = bigMapX0 + m*cellWidth;
floorName.y = bigMapY0 + n*cellHeight;
}
}
this.stop();
因為這個
"floorRC"+String(n)+String(m);
在某些情況下,對於不同的n和m對會產生相同的結果,例如
另一個
"floorR"+String(n)+"C"+String(m);
將始終產生一個唯一的String 。
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