这是代码。我认为它没有达到我们想要的效果。
package lines;
import sedgewick.StdDraw;
public class Lines {
public static boolean equals(double d1, double d2){
if(Math.abs(d2-d1) < 0.00001)
return true;
return false;
}
public static void drawLine(double x1, double y1, double x2, double y2) {
if(equals(x1,x2) && equals(y1,y2))
return;
double mid_x = (x2+x1)/2;
double mid_y = (y2+y1)/2;
drawLine(x1,y1,mid_x,mid_y);
drawLine(mid_x+0.001,mid_y+0.001,x2,y2);
StdDraw.point(mid_x, mid_y);
}
/**
* Code to test the drawLine method visually
*/
public static void main(String[] args) {
StdDraw.setPenRadius(0.02);
//
// Test the drawing program
//
drawLine(0,0,1,1); // lower left to upper right
drawLine(0,1,1,0); // upper left to lower right
//
// Draw rectangles of decreasing width and height
//
for (double r = 0.25; r < 0.5; r = r+.005) {
double s = 1-r;
drawLine(r,r, r, s);
drawLine(r, s, s, s);
drawLine(s, s, s, r);
drawLine(s, r, r, r);
}
System.out.println("done drawing");
}
}
这是我无法理解的结果。