日本人写的QRcode的编码和解码的java程序

				package jp.sourceforge.qrcode.codec.geom;
				
				import jp.sourceforge.qrcode.codec.reader.QRCodeImageReader;
				
				public class Axis {
					int sin, cos;
					int modulePitch;
					Point origin;
					
					public Axis(int sin, int cos, int modulePitch) {
						this.sin = sin;
						this.cos = cos;
						this.modulePitch = modulePitch;
						this.origin = new Point();
					}
					
					public void setOrigin(Point origin) {
						this.origin = origin;
					}
					
					public void setModulePitch(int modulePitch) {
						this.modulePitch = modulePitch;
					}
					
					public Point translate(Point offset) {
						int moveX = offset.getX();
						int moveY = offset.getY();
						return this.translate(moveX, moveY);
					}
					
					public Point translate(int moveX, int moveY) {
						long dp = QRCodeImageReader.DECIMAL_POINT;
						Point point = new Point();
						int yf = 0; //, xf = 0 ?
						if (moveX >= 0 & moveY >= 0) yf = 1;
						else if (moveX < 0 & moveY >= 0) yf = -1;
						else if (moveX >= 0 & moveY < 0) yf = -1;
						else if (moveX < 0 & moveY < 0) yf = 1;
						//System.out.println((modulePitch * moveX) >> dp);
						int dx = (moveX == 0) ? 0 : (modulePitch * moveX) >> dp;
						int dy = (moveY == 0) ? 0 : (modulePitch * moveY) >> dp;
						if (dx != 0 && dy != 0)
							point.translate((dx * cos - dy * sin) >> dp, yf * (dx * cos + dy * sin) >> dp);
						else if (dy == 0) { 
							if (dx < 0) yf = -yf;
							point.translate((dx * cos) >> dp, yf * (dx * sin) >> dp);
						}
						else if (dx == 0) {
							if (dy < 0) yf = -yf;
							point.translate(-yf * (dy * sin) >> dp, (dy * cos) >> dp);	
						}
						point.translate(origin.getX(), origin.getY());
				
						return point;
					}
				}