How to copy an image a few dozen times into the same picture with dif coordinates.

[Mary Seelye]

I am trying to draw a town. I have the pic of one house drawn. I need to be able to write a code to copy that picture and multiply it at different coordinates and different sizes. I have the code for the one house written, but I can't figure out how to multiply it. (Pic attached of example) I'm using DrJava.

My code for the house is:

      public void drawHouse() {
    //get graphics
    Graphics graphics = this.getGraphics();
    //start with black color
    graphics.setColor(Color.blue);
    //draw a filled rectangle
    graphics.fillRect(10,210,200,100);
    //set color back to black
    graphics.setColor(Color.black);
    //draw triangle
    Polygon poly = new Polygon();
    poly.addPoint(10, 210);
    poly.addPoint(110, 50);
    poly.addPoint(210, 210);
    graphics.fillPolygon(poly);
    //draw windows with yellow
    graphics.setColor(Color.yellow);
    graphics.fillRect(20,220,50,45);
    graphics.fillRect(150,220,50,45);
    //oval window
    graphics.fillOval(85,150,50,45);
    //draw door with black
    graphics.setColor(Color.black);
    graphics.fillRect(85,220,50,90);

[Nepomuk]

Well, the general idea would be to create a drawHouse() function which takes the arguments

• x The x-coordinate of, say, the top left corner.
• y The y-coordinate of the same corner.
• scale A scaling factor.

Or alternatively:

• x The x-coordinate of, say, the top left corner.
• y The y-coordinate of the same corner.
• width The width of the house.
• height Th height of the house

The code you already wrote would have to be modified something like this:

//...
graphics.fillRect(x,y,20*scale,10*scale);
//...
poly.addPoint(x, y);
poly.addPoint(x + 10*scale, 5*scale);
poly.addPoint(x, x + 20*scale);
//...

or

//...
graphics.fillRect(x,y-height/3,width,2*height/3);
//...
poly.addPoint(x, y);
poly.addPoint(x + width, width/2);
poly.addPoint(x, x + width);
//...

and so on and so forth.

You don't have to create a new Graphics- or Polygon-Object for each house, by the way (though you could).

Greetings,
Nepomuk