Simple 3D geometry

#include "visual/Whiteboard.h"

#include "base/CommandLineParser.h"
#include "base/FileParser.h"
#include "base/SVector.h"
#include "visual/Color.h"

#include "visual/Axes.h"
#include "visual/Geometry.h"

#include <iostream>



// Draw three lines in a 3d geometry
void Draw(const string & o, double x, double y)
{
  // Offset
  double x_offset = 20;
  double y_offset = 20;


  int i, j;

  // Declare the whiteboard
  ns_whiteboard::whiteboard board;


  // Set drawing area
  double x_max = 300.;
  double y_max = 300.;

  // Add background (only needed for later conversion to certain other graphics formats)
  board.Add( new ns_whiteboard::rect( ns_whiteboard::xy_coords(0, 0), 
  				      ns_whiteboard::xy_coords(x_max + 2*x_offset, y_max + 2*y_offset),
  				      color(0.99,0.99,0.99)));
  
  // Declare geometry
  Geometry3D g;

  // Move the center to 150
  g.SetOffset(150.);

  // Set the angle from which we look at it
  g.SetRotation(x, y);

  // Length of the lines
  double d = 170.;

  y = 0.;

  // Add three lines in different colors
  board.Add( new ns_whiteboard::line( g.Coords(0, 0, 0), 
				      g.Coords(d, 0, 0),
				      1.,
				      color(0.99,0.,0.)));

  board.Add( new ns_whiteboard::line( g.Coords(0, 0, 0), 
				      g.Coords(0, d, 0),
				      1.,
				      color(0.,0.99,0.)));

  board.Add( new ns_whiteboard::line( g.Coords(0, 0, 0), 
				      g.Coords(0, 0, d),
				      1.,
				      color(0.,0.,0.99)));



  // Open output stream
  ofstream out(o.c_str());
  
  // Declare a post-script display
  ns_whiteboard::ps_display display(out, x_max + 2 * x_offset, y_max + 2 * y_offset);
  
  // Display & save...
  board.DisplayOn(&display);
 
}


// Main routine
int main( int argc, char** argv )
{
 
  commandArg<string> aStringO("-o","outfile (post-script)");
 
  
  commandLineParser P(argc,argv);
  P.SetDescription("Simple 3d plot");

  P.registerArg(aStringO);

  P.parse();

  string o = P.GetStringValueFor(aStringO);
  Draw(o, 0.3, 0.0);
      
 
  return 0;
}