// Program: 3055
//  Author: Manuel J. A. Eugster ( e0126312@student.tuwien.ac.at )
//  FileId: $Id: RGBSystem.java,v 1.1.1.1 2001/12/10 18:56:04 heder Exp $



import java.lang.*;
import RGBVector;
import RGBRectangle;



// CLASS:
//    Red Green Blue Color space.
//
public class RGBSystem
{
  private RGBVector vRGBSpace;   // Red Green Blue Color space
  private RGBVector vRGBReduce;  // Red Green Blue reduction relation
  
  
  
  // METHOD:
  //    Constructor. Standard red, blue, green values (255).
  //
  public RGBSystem()
  { 
    this.vRGBSpace = new RGBVector( 255, 255, 255 );
  }
  
  
  
  // METHOD:
  //    Constructor. Possible to set other red, green, blue
  //    values.
  //
  public RGBSystem( int iR, int iG, int iB )
  {
    this.vRGBSpace = new RGBVector( iR, iG, iB );
  }
  
  

  // METHOD:
  //    Set color reduction
  // 
  public void setReduction( int iRedR, int iRedG, int iRedB )
  {
    this.vRGBReduce = new RGBVector( iRedR, iRedG, iRedB );
    
    
    return;
  }
  
  

  // METHOD:
  //    Creates the rectangle around the real point.
  //
  public RGBRectangle createRect( int iR, int iG, int iB )
  {
    RGBVector vPoint = new RGBVector( iR, iG, iB );  // Real point
    int [] iRGBReduced = {-1, -1, -1, -1, -1, -1};   // Reduced points
    
    
    for ( int i = 0; i < 3; i++ )
    {
      int iUBorder = 0;
      int iLBorder = 0;
      int j = 0;
      
      do
      {
        iUBorder = ( int ) Math.round( ( vRGBSpace.getCoord( i ) / vRGBReduce.getCoord( i ) ) * j );
        j++;
      }
      while ( vPoint.getCoord( i ) > iUBorder );
      
      iLBorder = ( int ) Math.round( ( vRGBSpace.getCoord( i ) / vRGBReduce.getCoord( i ) ) * ( j - 2 ) );

      
      if ( Math.abs( vPoint.getCoord( i ) - iUBorder ) < Math.abs( vPoint.getCoord( i ) - iLBorder ) )
      {
        iRGBReduced[i] = iUBorder;
        iRGBReduced[i + 3] = iLBorder;
      }
      else
      {
        iRGBReduced[i] = iLBorder;
        iRGBReduced[i + 3] = iUBorder;
      }
    }
    
    
    return( new RGBRectangle( vPoint, iRGBReduced ) );
  }
}