public void animate() {
// invert path.
Coord path = PG.search(goby, gobx, profy, profx);
// coord path = PG.search(profy,profx, goby,gobx);
if (path == null) {
display.setColor(Color.red);
display.drawString("NO PATH TO TARGET!", 50, 100);
System.out.println("no path");
return;
}
int px = 0, py = 0; // for calculating graphical coords
while (path != null) {
px = getx(path.y, path.x);
py = gety(path.y, path.x);
display.drawImage(
imagechar[PG.M[path.y][path.x]], (px - gap / 2), (py - gap / 2), gap, gap, null);
// display.drawImage(imagechar[PG.M[path.y][path.x]],
// (path.x*gap),(path.y*gap)+yoff,gap,gap,null);
System.out.printf("%d,%d: %d\n", path.y, path.x, PG.M[path.y][path.x]);
try {
Thread.sleep(250);
} catch (Exception se) {
}
// display.drawImage(imageof[PG.M[path.y][path.x]],
// (path.x*gap),(path.y*gap)+yoff,gap,gap,null);
// display.setColor(Color.red);
// display.fillOval((path.x*gap)+8,(path.y*gap)+yoff+8,4,4);
// for animation:
// display.drawImage(diamondgif,gobx*gap,goby*gap+yoff,gap,gap,null);
if (!showtrace) // erase trail - redraw hexagon
{
display.setColor(colorof[PG.M[path.y][path.x]]);
display.fillPolygon(HX[path.y][path.x]);
}
path = path.prev;
} // with path!=null
px = getx(goby, gobx);
py = gety(goby, gobx);
display.drawImage(diamondgif, px - gap / 2, py - gap / 2, gap, gap, null);
display.drawImage(imagechar[PG.M[goby][gobx]], px - gap / 2, py - gap / 2, gap, gap, null);
} // animate
public Pathfinder(int r, int c) // constructor
{
rows = r;
cols = c;
HX = new Hexagon[r][c];
for (int i = 0; i < r; i++) {
int odd = i % 2;
for (int j = 0; j < c; j++) {
HX[i][j] =
new Hexagon(yoff / 2 + (j * 2 + odd) * hpdist, yoff + gap + (3 * gap / 2 * i), gap);
}
} // for i,j
PG = new MyAstar(r, c); // note it's myastar, not astar
XDIM = cols * hpdist * 2 + yoff; // ((cols+1)*gap*3)/2;
YDIM = ((rows + 1) * gap * 3) / 2;
this.setBounds(0, 0, XDIM + 5, YDIM + yoff + 5);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
display = this.getGraphics();
diamondgif = Toolkit.getDefaultToolkit().getImage("gem1.gif");
prepareImage(diamondgif, this);
mangif = Toolkit.getDefaultToolkit().getImage("man15.gif");
prepareImage(mangif, this);
imagechar = new Image[4]; // image of character while on terrain type
imagechar[Astar.OPEN] = mangif;
imagechar[Astar.WATER] = Toolkit.getDefaultToolkit().getImage("boat.gif");
prepareImage(imagechar[Astar.WATER], this);
imagechar[Astar.DESERT] = Toolkit.getDefaultToolkit().getImage("camel.gif");
prepareImage(imagechar[Astar.DESERT], this);
imagechar[Astar.FOREST] = Toolkit.getDefaultToolkit().getImage("bear.gif");
prepareImage(imagechar[Astar.FOREST], this);
try {
Thread.sleep(500);
} catch (Exception e) {
} // Synch with system
// draw static background as a green rectangle
display.setColor(Color.green);
display.fillRect(0, 0, XDIM, YDIM + yoff); // fill background
// generate random starting positions.
// generate initial positions of professor and diamond
do {
gobx = (int) (Math.random() * PG.COLS);
goby = (int) (Math.random() * PG.ROWS);
} while (PG.M[goby][gobx] != PG.OPEN);
do {
profx = (int) (Math.random() * PG.COLS);
profy = (int) (Math.random() * PG.ROWS);
} while (PG.M[profy][profx] != PG.OPEN || Astar.distance(goby, gobx, profy, profx) < 20);
// draw map
drawmap();
System.out.println(profy + "," + profx + " " + goby + "," + gobx);
// draw professor and diamond, initial position
int px = getx(profy, profx), py = gety(profy, profx); // center hx coords
display.drawImage(
imagechar[PG.M[profy][profx]], (px - gap / 2), (py - gap / 2), gap, gap, null);
px = getx(goby, gobx);
py = gety(goby, gobx);
display.drawImage(diamondgif, px - gap / 2, py - gap / 2, gap, gap, null);
/*
display.drawImage(imagechar[PG.M[profy][profx]],
(profx*gap),(profy*gap)+yoff,gap,gap,null);
display.drawImage(diamondgif,gobx*gap,goby*gap+yoff,gap,gap,null);
*/
animate();
} // constructor