Re: drawPolyLine

From: Paul Lutus (nospam_at_nosite.zzz)
Date: 10/01/04 

Date: Fri, 01 Oct 2004 11:34:00 -0700

Taji wrote:

> Does anyone have a servlet that draws a poly-line graph that I can
> use? I have one but it draws the graph with the origin at the top left
> corner of the image object. I just need to know how to translate the
> graph so that the origin is at the bottom left corner so it looks like
> a normal graph with x and y coordinates.

Very briefly:

1. Find the height of the drawing surface.
2. Subtract all y coordinates from the height established in (1).

In other words, instead of plotting x,y, plot x,h-y. 

-- 
Paul Lutus
http://www.arachnoid.com

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