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From: rodolfo_at_[hidden]
Date: 2006-03-17 13:09:26

On Fri, Mar 17, 2006 at 10:17:53AM -0700, Richard Newman wrote:
> Is it reasonable to extend the logic to check for 3D shapes (i.e.,
> spheres instead of circles, etc.)?
> It certainly would be a reasonable strategy to get the 2D work you have
> into the library and treat 3D as a later extension.

Well, 3D is a whole different beast, and is not implemented yet :) What
I have is the following (with my name convention, to be changed...):

geom_t is an abstract base class with basic functions like:
 - center -> return the center point of the geometry
 - box -> return a rectangle encompassing the whole geometry
 - area -> returns its area

then there's the primitive classes that inherits from geom_t:
  point_t -> a single point in the 2D space
  circle_t -> represented as a 2D point and a radius
  rectangle_t -> represented as two points, the upper left and lower

I'm planning to add polygon and triangle soon.

There are also operator>> and << to transfer from and to a stream,
and free functions that returns intersections, unions, etc.

All coordinates are double. Maybe each primitive should be a template,
like: point_t<double> is a point with double floating point coordinates,
point_t<int> is with integer coordinates, etc.

More ideas are welcome :)

Rodolfo Lima.

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