/**
* Finds the upper bounds on the absolute values of the coordinates for the points
*
* @param points list of points
* @return {maximum x, minimum x, maximum y, minimum y}
*/
private static int[] getLimits(LinkedList<Comparable> points) {
int[] bounds = {0, 0, 0, 0};
Iterator<Comparable> it = points.iterator();
while (it.hasNext()) {
Point point = (Point) it.next();
bounds[0] = Math.max(bounds[0], point.x);
bounds[1] = Math.min(bounds[1], point.x);
bounds[2] = Math.max(bounds[2], point.y);
bounds[3] = Math.min(bounds[3], point.y);
}
return bounds;
}
/*
* Input should be in form:
* java Plot x1,y1 x2,y2 ...
*/
public static void main(String[] args) {
LinkedList<Comparable> points = new LinkedList<Comparable>();
for (String s : args) {
points.add(readPoint(s));
}
int[] bounds = getLimits(points);
int xMax = bounds[0];
int xMin = bounds[1];
int yMax = bounds[2];
int yMin = bounds[3];
System.out.println("Plotting " + points + ":");
points = sortPoints(points);
Iterator<Comparable> pointsIt = points.iterator();
Point curr = (Point) pointsIt.next();
if (curr == null) // No points given
curr = new Point(xMax + 1, yMax + 1); // Will never be plotted
for (int j = yMax; j >= yMin; j--) {
for (double i = xMin; i <= xMax; i += 0.5) {
if (i == curr.x && j == curr.y) { // Point
System.out.print("*");
if (pointsIt.hasNext()) curr = (Point) pointsIt.next();
} else if (i % 5 == 0 && j % 5 == 0) { // Origin or 5-point marks
System.out.print("+");
} else if (i == 0) { // Y-axis
if (j == yMin) {
System.out.print("v");
} else if (j == yMax) {
System.out.print("^");
} else {
System.out.print("|");
}
} else if (j == 0) { // X-axis
if (i == xMin) {
System.out.print("<");
} else if (i == xMax) {
System.out.print(">");
} else {
System.out.print("-");
}
} else {
System.out.print(" ");
}
}
System.out.print("\n");
}
}