Help: use of makeOval

Posted by Xuan Yang on Jul 28, 2005; 12:55am
URL: http://imagej.273.s1.nabble.com/Help-use-of-makeOval-tp3705113.html

Hi all,

I tried to use makeOval to draw a set of circles (the macro is shown below).
But because it's not center-based, it gave me some trouble when I used the
circles later (the center is shifted a little bit.). Can anyone please tell
me how to draw the circles based on the center and size? I also tried to use
the recorded line:
"run("Specify...", "width=250 height=250 x=125 y=125 oval centered");" but I
don't know how to transfer a variable to this line. Thanks for any
suggestions in advance.


open(); //open a text file which contains the names of the images to be
saved in.
contents = getInfo();
run("Close");
list = split(contents, "\n");
xx=50;
yy=50;
for (k=1;k<26;k++) {
        newImage("Untitled", "8-bit White", 500, 500, 1);
        dotSize = sqrt(25*25-(k-1)*(k-1)); //Calculate the radius of the circles on
this image.
          for (i=1; i<11; i++) {
                for (j=1;j<11;j++) {
      x = xx/2+(i-1)*xx-dotSize; //Calculate the left boundary of the
circle
                        y = yy/2+(j-1)*yy-dotSize; //Calculate the top boundary of the circle
                        makeOval(x, y, dotSize*2, dotSize*2); //Draw a circle based on the size
and the boundary points.
                        run("Fill");

                }
           }
        run("Select None");
        run("Invert");
        saveAs("Tiff", list[k]);
        close();
}

----------------------------------------------
Xuan Yang
Graduate Research Assistant
School of Civil and Environmental Engineering
Georgia Institute of Technology
Atlanta, GA 30332-0355
Phone: [phone]
Fax: [phone]