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你能幫助我,我怎麼可以設定此:繪圖用Java(模擬器)
我有一個JPanel作爲圖形區,我要生成從畫線,我有一個隨機的距離,一個隨機阿爾法。 問題在於第一個點是在這個jPanel中,第二個是從這個jPanel出來的。 我想畫的休息線,從另一部分,該圖像解釋一下我想做的事:
測試是:
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();
}
問題出在哪裏?
http://stackoverflow.com/help/mcve在這裏會非常有幫助。 – Marco13