Re: map algorithm question

From: "Oliver Wong" <owong@xxxxxxxxxxxxxx>
Date: Tue, 07 Mar 2006 14:31:36 GMT

"Lou Lipnickey" <lou.lipnickey@xxxxxxxxx> wrote in message news:FcOOf.7503$S25.3571@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

I am working on an application which draws maps on a screen. This is done with using sets of x,y coordinates which are made into polygons and then drawn in a paintComponent. The user now wants to add elevation (a "z" component). The question at hand is how to quickly index into a data structure to find an elevation point based on the mouse location (x,y) of the screen. Currently, polygon.contains(x,y) is used. I was hoping that someone might either relate how they might have done something similar or a pointer to reference. Thanks - Lou

The z component is associated with every polygon, or with every vertex or what?

- Oliver

.

References:
- map algorithm question
  - From: Lou Lipnickey

Prev by Date: Re: max size of virtual memory
Next by Date: thread priority question...
Previous by thread: map algorithm question
Next by thread: Re: Get the event at webserver when a user closes the explorer
Index(es):
- Date
- Thread

Relevant Pages

mapping question
... I am working on an application which draws maps on a screen. ... This is done with using sets of x,y coordinates which are made into polygons and then drawn in a paintComponent. ... The question at hand is how to quickly index into a data structure to find an elevation point based on the mouse location of the screen. ... Although not exactly a GUI question I was hoping that someone might either relate how they might have done something similar or a pointer to reference. ...
(comp.lang.java.gui)
Re: DEM-like maps using TYP customisation (GARMIN)
... Greg proposes to convert existing elevation polylines into elevation ... In this case all higher polygons would overlap ...
(sci.geo.satellite-nav)
map algorithm question
... I am working on an application which draws maps on a screen. ... This is done with using sets of x,y coordinates which are made into polygons and then drawn in a paintComponent. ... The question at hand is how to quickly index into a data structure to find an elevation point based on the mouse location of the screen. ... I was hoping that someone might either relate how they might have done something similar or a pointer to reference. ...
(comp.lang.java)
map algorithm question
... I am working on an application which draws maps on a screen. ... This is done with using sets of x,y coordinates which are made into polygons and then drawn in a paintComponent. ... The question at hand is how to quickly index into a data structure to find an elevation point based on the mouse location of the screen. ...
(comp.lang.java.programmer)
Re: Drawing two overlapping lines in different colors
... I currently can lasso select points and polygons in my OpenGL ... widget, whoopee! ... What I do is change the color that the GL_LINE_LOOP is drawn to create the ... Use glPolygonOffset to draw it slightly closer than the other one. ...
(comp.graphics.api.opengl)