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Thread: How do I draw an image, knowing the co-ordinates and rgb values??

  1. #1
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    Default How do I draw an image, knowing the co-ordinates and rgb values??

    Ok....I have an array called FINALE[w*h+1][7]

    In finale[][2], i have the red value
    In finale[][3], i have the green value
    In finale[][4], i have the blue value
    In finale[][0], i have the x co-ordinate value
    In finale[][1], i have the y co-ordinate value

    With these values...I want to create ie draw an image of dimensions w*h...

    How do I do that?
    Could someone post a snippet of code for the same or tell me the steps please??

    Hey thanks a lot....this forum seems to be a saviour!


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    Default Re: How do I draw an image, knowing the co-ordinates and rgb values??

    Have you looked at the PixelGrabber class? Its get and set methods might do what you want.

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    Default Re: How do I draw an image, knowing the co-ordinates and rgb values??

    Quote Originally Posted by byrtis View Post
    With these values...I want to create ie draw an image of dimensions w*h...

    How do I do that?
    Could someone post a snippet of code for the same or tell me the steps please??
    I am going to give you some ideas then show you the way I created a image on a canvas, just note that not all the code is in this snippet.

    my code to draw a triangle
        public void paint(Graphics graphic) {
            g = (Graphics2D) graphic;
            //set the center and radius of the panel
            reSize(getWidth(), getHeight());
     
    //        System.out.println("in paint");
    //        draw a square box
            g.fillRect(getWidth() - (getWidth() - 20), getHeight() - 30, getWidth() - (getWidth() - 35),
                    getHeight());
     
    //        draw a square box on top of the box previously drawn
    //        g.fillRect(28, getHeight() - currentHeight, 20, getHeight());
            g.fillRect(getWidth() - (getWidth() - 28), getHeight() - currentHeight, getWidth() - (getWidth() - 20),
                    getHeight());
     
    //         draws a ********** line
            g.drawLine(28, getHeight() - currentHeight, getWidth(),
                    getHeight() - currentHeight);
     
    calculateMag();
     
            if (*&^^%%$$ > 35) {
     
                if (#$$%%^&&& > 0) {
                    g.setColor(Color.green);
                } else {
                    g.setColor(Color.red);
                }
     
    //rotates the images on the panel from this point on
                this.g.translate(0, 0);
     
     
    //            System.out.println("elevation " + elevation);
    //        //rotating the panel to a degree in %%%%%%%%
                g.rotate(Math.toRadians(90 - @@@@@), vp.getCenter().x, getHeight() - currentHeight);
    //        g.rotate(Math.toRadians(******), center.x, center.y);
    //
     
    //        if (*&^^%%$$ > 0) {
    //            g.setColor(Color.GREEN);
    //        } else {
    //            g.setColor(Color.red);
    //        }
                vp.setViewAngle(*&^^%%$$);
    //        //I add the triangle to the rotated jpanel
                g.fillPolygon(vp.getTrianglePolygon());
     
     
     
            //draws my @@@@@ line
            g.setColor(Color.BLUE);
     
            //draw a line for @@@@@ this will help later with ******  in the view area
            g.drawLine(vp.getCenter().x, vp.getCenter().y, vp.getCenter().x,
                    Math.round(vp.getCenter().y - radius));
    //        graphic.setColor(Color.black);
    //        graphic.drawLine(this.getCenter().x, this.getCenter().y, this.getCenter().x,
    //                Math.round(this.getCenter().y - this.getRadius()));

    additionally called a get method in different class to get the triangle this class keeps the running calculation and the Polygon when it called from the running program

    this is vp class from the code above.

     
    // ... more code above...
     
     private void setScopeView() {
            this.left = new Point((int) (center.x - radius * Math.sin(Math.toRadians(-this.beta[arrayPosition ]))),
                    (int) (center.y - this.radius * Math.cos(Math.toRadians(-this.beta[arrayPosition]))));
     
            this.right = new Point((int) (center.x - this.radius * Math.sin(Math.toRadians(
                    this.beta[arrayPosition]))), (int) (center.y - this.radius * Math.cos(Math.toRadians(
                    this.beta[arrayPosition]))));
     
            //add points to polygon
            if (this.p == null) {//check for null values
                this.p = new Polygon();
            } else {
                  this.p.reset();
            }
     
            //sets the points to create a polygon (triangle)
            this.p.addPoint(center.x, center.y);
            this.p.addPoint(left.x, left.y);
            this.p.addPoint(right.x, right.y);
            this.p.addPoint(center.x, center.y);
        }
     
        /**
         * this will return the polygon that was created from setScopeView points
         *
         * @return trianglepolygon(4 point)
         */
        public Polygon getTrianglePolygon() {
            return this.p;
        }

    creating and drawing an image using buffers
    drawImage

    drawing buffered image on canvas

    hope this helps

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    Default Re: How do I draw an image, knowing the co-ordinates and rgb values??

    william,

    Could you please explain this to me. I've never seen anything like it.

     if (*&^^%%$$ > 35) {
     
                if (#$$%%^&&& > 0) {


    byrtis,

    Check out my image processing tutorial. You should find some of the snippets useful.

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