Re: Drawing OMPoly with markings

UGH! forget I asked, I see my own typo!

Jeremy Zacker wrote:

> I am trying to draw a regular OMPoly with markings evenly spaced on the
> Polygon
> (like a railroad line).
>
> First I tried just drawing the OMPoly and then (using xpoints and
> ypoints from the OMPoly),
> I would evenly divide the poly in segments and then draw a slash at each
> point.
>
> This worked fine except when I would draw a very large OMPoly and then
> zoom in very close.
> I would be drawing stuff offscreen and it would take too long for it all
> to render.
>
> I then tried to only draw my slashes on the visible portion of the
> OMPoly. Here is where my
> problems arose. I am having difficulty determining which parts of the
> OMPoly are visible on the screen.
> When I zoom in tight on the OMPoly (scale < 10000), my code says that no
> portion of the OMPoly
> is on the screen, even though I can see it! Has anyone tried something
> like this? Here's a snippet of my
> code to find the visible segments...
>
> *****************************
> Rectangle rect = new Rectangle(new Point(0, 0), mapBean.getSize());
>
> for(i = 0; i < xpoints.length; i++) {
> int length2 = xpoints[i].length;
>
> for(j = 0; j < length2 - 1; j++) {
>
> //Get a line segment of the total poly.
> int x1 = xpoints[i][j];
> int y1 = ypoints[i][j];
> int x2 = xpoints[i][j+1];
> int y2 = ypoints[i][j+1];
>
> //test the retangle, 'rect' is visible area
>
> if(rect.contains(x1, y1) ||
> rect.contains(x2, y2) ||
> rect.intersectsLine(x1, y1, x2, y1)) {
> System.out.println(rect + " intersects " + x1 + " " + y1 + " "
> + x2 + " " + y2);
> } else {
> System.out.println(rect + " does not intersect " + x1 + " " +
> y1 + " " + x2 + " " + y2);
> }
> }
> }
>
> *****************************
>
> --
> Jeremy "Slacker" Zacker - "BLAH!"
> MCS Blk IV
> (732) 450-7066
>
> --
> [To unsubscribe to this list send an email to "majdart@bbn.com"
> with the following text in the BODY of the message "unsubscribe openmap-users"]

--
Jeremy "Slacker" Zacker  -  "BLAH!"
MCS Blk IV
(732) 450-7066
--
[To unsubscribe to this list send an email to "majdart@bbn.com"
with the following text in the BODY of the message "unsubscribe openmap-users"]