衝突検出に問題があります。ウェブサイトhttp://www.freeactionscript.com/2009/05/pixel-perfect-collision-detection/からこの例を使用しましたが、オブジェクトの登録ポイントが上部にある場合にのみ機能します左隅 登録点が中央にあるとしたら、コードの何を変更すればよいですか?
コードは次のとおりです。
package
{
import flash.display.BitmapData;
import flash.display.DisplayObjectContainer;
import flash.geom.Matrix;
import flash.geom.Point;
import flash.geom.Rectangle;
public class CollisionTest
{
// vars
private var _returnValue:Boolean;
private var _onePoint:Point;
private var _twoPoint:Point;
private var _oneRectangle:Rectangle;
private var _twoRectangle:Rectangle;
private var _oneClipBmpData:BitmapData;
private var _twoClipBmpData:BitmapData;
private var _oneOffset:Matrix;
private var _twoOffset:Matrix;
/**
* Simple collision test. Use this for objects that are not rotated.
* @param clip1 Takes DisplayObjectContainer as argument. Can be a Sprite, MovieClip, etc.
* @param clip2 Takes DisplayObjectContainer as argument. Can be a Sprite, MovieClip, etc.
* @return Collision True/False
*/
public function simple(clip1:DisplayObjectContainer, clip2:DisplayObjectContainer):Boolean
{
_returnValue = false;
_oneRectangle = clip1.getBounds(clip1);
_oneClipBmpData = new BitmapData(_oneRectangle.width, _oneRectangle.height, true, 0);
_oneClipBmpData.draw(clip1);
_twoRectangle = clip2.getBounds(clip2);
_twoClipBmpData = new BitmapData(_twoRectangle.width, _twoRectangle.height, true, 0);
_twoClipBmpData.draw(clip2);
_onePoint = new Point(clip1.x, clip1.y)
_twoPoint = new Point(clip2.x, clip2.y)
if (_oneClipBmpData.hitTest(_onePoint, 255, _twoClipBmpData, _twoPoint, 255))
{
_returnValue = true;
}
return _returnValue;
}
/**
* Complex collision test. Use this for objects that are rotated, scaled, skewed, etc
* @param clip1 Takes DisplayObjectContainer as argument. Can be a Sprite, MovieClip, etc.
* @param clip2 Takes DisplayObjectContainer as argument. Can be a Sprite, MovieClip, etc.
* @return Collision True/False
*/
public function complex(clip1:DisplayObjectContainer, clip2:DisplayObjectContainer):Boolean
{
_returnValue = false;
_twoRectangle = clip1.getBounds(clip1);
_oneOffset = clip1.transform.matrix;
_oneOffset.tx = clip1.x - clip2.x;
_oneOffset.ty = clip1.y - clip2.y;
_twoClipBmpData = new BitmapData(_twoRectangle.width, _twoRectangle.height, true, 0);
_twoClipBmpData.draw(clip1, _oneOffset);
_oneRectangle = clip2.getBounds(clip2);
_oneClipBmpData = new BitmapData(_oneRectangle.width, _oneRectangle.height, true, 0);
_twoOffset = clip2.transform.matrix;
_twoOffset.tx = clip2.x - clip2.x;
_twoOffset.ty = clip2.y - clip2.y;
_oneClipBmpData.draw(clip2, _twoOffset);
_onePoint = new Point(_oneRectangle.x, _oneRectangle.y);
_twoPoint = new Point(_twoRectangle.x, _twoRectangle.y);
if(_oneClipBmpData.hitTest(_onePoint, 255, _twoClipBmpData, _twoPoint, 255))
{
_returnValue = true;
}
_twoClipBmpData.dispose();
_oneClipBmpData.dispose();
return _returnValue;
}
}
}