-2
你能帮助我,我怎么可以设定此:绘图用Java(模拟器)
我有一个JPanel作为图形区,我要生成从画线,我有一个随机的距离,一个随机阿尔法。 问题在于第一个点是在这个jPanel中,第二个是从这个jPanel出来的。 我想画的休息线,从另一部分,该图像解释一下我想做的事:
测试是:
if(y1<0){
tmp_x=x1;
tmp_y=y1;
x1= (x1-(Math.abs(y1)*(x1-x))/(Math.abs(y-y1)));
y1=0;
g.drawLine(x, y, x1, y1);
System.out.println("(x,y);(x1,y1): ("+x+","+y+");"+"("+x1+","+y1+")");
x=x1;
y=jPanel1.getHeight();
x1=tmp_x;
y1=jPanel1.getHeight()-Math.abs(tmp_y);
}
if(y1>jPanel1.getHeight()){
tmp_x=x1;
tmp_y=y1;
x1=x1-(Math.abs(Math.abs(y1-y)-Math.abs(y1-jPanel1.getHeight())))*(x1-x)/(Math.abs(y1-y));
y1=jPanel1.getHeight();
g.drawLine(x, y, x1, y1);
System.out.println("(x,y);(x1,y1): ("+x+","+y+");"+"("+x1+","+y1+")");
x=x1;
y=0;
x1=tmp_x;
y1=tmp_y-jPanel1.getHeight();
}
if(x1<0){
tmp_x=x1;
tmp_y=y1;
y1= (y1-(Math.abs(x1)*(y1-y))/(Math.abs(x-x1)));
x1=0;
g.drawLine(x, y, x1, y1);
System.out.println("(x,y);(x1,y1): ("+x+","+y+");"+"("+x1+","+y1+")");
y=y1;
x=jPanel1.getWidth();
y1=tmp_y;
x1=jPanel1.getWidth()-Math.abs(tmp_x);
}
if(x1>jPanel1.getWidth()){
tmp_x=x1;
tmp_y=y1;
y1=y1-(Math.abs(Math.abs(x1-x)-Math.abs(x1-jPanel1.getWidth())))*(y1-y)/(Math.abs(x1-x));
x1=jPanel1.getWidth();
g.drawLine(x, y, x1, y1);
System.out.println("(x,y);(x1,y1): ("+x+","+y+");"+"("+x1+","+y1+")");
y=y1;
x=0;
y1=tmp_y;
x1=tmp_x-jPanel1.getWidth();
}
问题出在哪里?
http://stackoverflow.com/help/mcve在这里会非常有帮助。 – Marco13