¿Por qué mi edificio en Java no se dibuja correctamente?

I'm trying to draw a rectangle with a stylized edge on it, but unfortunately the edge only covers the left and top sides.

public Graphics2D Draw(Graphics2D b, long cameraX, long cameraY) {
    //let's do the drawing stuff, yay
    renderImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g = renderImage.createGraphics();
    int[] xPs= new int[pointsarray.length];
    int[] yPs= new int[pointsarray.length];
    int i=0;
    for (Pair p:pointsarray){
    g.fillPolygon(xPs, yPs, xPs.length);
    g.drawPolygon(xPs, yPs, xPs.length);
    b = super.Draw(b, cameraX, cameraY);
    return b;

Yes, it's a polygon. I have to keep this extendable.

EDIT: This is what pointsarray looks like for now.

    pointsarray = new Pair[4];

    pointsarray[0] = new Pair(0,0);
    pointsarray[1] = new Pair(0,height);
    pointsarray[2] = new Pair(width,height);
    pointsarray[3] = new Pair(width,0);

Render method: (this is overridden by the first method) (also I admit that the -renderImage.getWidth()/2 part was wrong)

public Graphics2D Draw(Graphics2D b ,long cameraX, long cameraY) {
    AffineTransform t = AffineTransform.getRotateInstance(r);
    AffineTransformOp op = new AffineTransformOp(t,AffineTransformOp.TYPE_BILINEAR);
    b.drawImage(renderImage, op, (int)(cameraX-x), (int)(cameraY-y));
    return b;

JFrame final render:

public void paintComponent(Graphics g) {
    Graphics2D r = (Graphics2D) g;
    Graphics2D b = (Graphics2D) r.create(); // i herd you liek buffers
    b.clearRect(0, 0, getWidth(), getHeight()); // clear the buffer
    // let's draw some... stuff
    long newCameraX = cameraX;
    long newCameraY = cameraY;
    // background
    b.fillRect(0, 0, getWidth(), getHeight());
    for (Entity entity : entities) {
        entity.Draw((Graphics2D) b, cameraX + (this.getSize().width / 2),
                cameraY + (this.getSize().height / 2));

    // we're done drawing. let's put the stuff back in the first thing
    r = b;
    cameraX = newCameraX;
    cameraY = newCameraY;

Clase de pareja:

public class Pair {
    public int[] pair = {0,0}; 

    public Pair(int num1, int num2) {
        pair[0] = num1;
        pair[1] = num2;
    //you mad?

preguntado el 12 de junio de 12 a las 16:06

What sort of reference do we have? Is this an applet, JFrame, can we see the paint method? -

Where is pointsarray ? The error may be in its definition (like missing two sides). -

para una mejor ayuda antes de publicar un SSCCE -

Is it possible that what you are experiencing is due to the fact that you subtract renderImage.getWidth()/2 from both the x and y parts of the camera in Draw()? -

What's the Pair class ? The call to its content is strange. Does each instance contain an array called pair of just two items ? Ok, seen the edit, this is indeed a strange class... -

1 Respuestas

Basically you are drawing the bottom and right portions of your polygon outsize of the image. Java Graphics.fillPolygon: ¿Cómo renderizar también los bordes derecho e inferior?

contestado el 23 de mayo de 17 a las 13:05

Rendering hints, got it! Thanks! - sorprendentes

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