RE: [Dsol-java] Real / screen coordinates

[Dirk S. <di...@tb...>]

Morning Peter,

Thanks for your answer; I will drop in the moment I'm stuck!

1) Using a 1:1 scale drawing a pallet of .46m becomes very difficult, since
e.g. graphics.fillRect accepts only int's as parameters (this is in pixels,
right?). Also I noticed that 'automagically' I get a nice tooltip in my
animation window, showing the coordinates of my mousepointer both in 'world'
and 'screen' coordinates. How do I turn this on/off?

2) Detecting collision (this has, for the moment, nothing to do with the
animation). My pallet's have (they are Locatable) a getBounds method giving
the static bounds of a pallet around (0,0,0). To detect collision between
two objects I will use the (javax.media.j3d)Bounds.intersect method. Where
to go from this point?
> Do I need a getCurrentBounds method? How to "add" pallet.Location and
pallet.getBounds() ?
> In case of intersection, is it possible to detect the magnitude of
penetration, so that I can make the pallet move as far as possible by
subtracting penetration from initial deltaX,Y,Z ?
> Why does Bounds.intersect() return (only) a boolean?

3) By the end of this day I would like to have working collision-detection
on my pallets with a proper animation; this is where I wan't the scale of my
animation to be properly defined, so that intersection of bounds coincides
with collision of on-screen-rectangles.

4) My current work (in progress) is available on CVS: Module comparison2.
I'm currently testing/developing the above with two pallets moving in
opposite directions.

Thanks for your time,
Dirk

-----Original Message-----
From: Peter H.M. Jacobs [mailto:p.h...@tb...]
Sent: dinsdag 26 oktober 2004 8:36
To: 'Dirk Samson'; 'Dsol-java (E-mail)'
Subject: RE: [Dsol-java] Real / screen coordinates


Hi Dirk,

Today I will spend the entire day on some nice nerding.. I will upload the
model of last week and show you how to use stuff..

To answer your question. Since the coordinates in DSOL reflect GIS
coordinates, look at http://erg.usgs.gov/isb/pubs/gis_poster/ for more
information.

The easy way to understand the coordinates is to understand {x,y} in meters
where positive x=right and positive y=up. On your screen the positive
y=down. This is not DSOL specific but complies with international standards

Peter
Ps I you experience any problems today, please feel free to visit.



-----Original Message-----
From: dso...@li...
[mailto:dso...@li...] On Behalf Of Dirk Samson
Sent: Monday, October 25, 2004 4:11 PM
To: Dsol-java (E-mail)
Subject: [Dsol-java] Real / screen coordinates

Dear dsol-guru's

(this isn't a very specific question)

Who can tell me more on the 'world' coordinates in the animation screen? Is
there (where) a scale that can be defined? Where can I find more explanation
(I think I know where to find the documentation) ?


Groeten,

dirk



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