Generate distinctly different RGB colors in graphs

Question

When generating graphs and showing different sets of data it usually a good idea to difference the sets by color. So one line is red and the next is green and so on. The pro

Answer 1

I implemented this algorithm in a shorter way

void ColorValue::SetColorValue( double r, double g, double b, ColorType myType )
{
   this->c[0] = r;
   this->c[1] = g;
   this->c[2] = b;

   this->type = myType;
}


DistinctColorGenerator::DistinctColorGenerator()
{
   mFactor = 255;
   mColorsGenerated = 0;
   mpColorCycle = new ColorValue[6];
   mpColorCycle[0].SetColorValue( 1.0, 0.0, 0.0, TYPE_RGB);
   mpColorCycle[1].SetColorValue( 0.0, 1.0, 0.0, TYPE_RGB);
   mpColorCycle[2].SetColorValue( 0.0, 0.0, 1.0, TYPE_RGB);
   mpColorCycle[3].SetColorValue( 1.0, 1.0, 0.0, TYPE_RGB);
   mpColorCycle[4].SetColorValue( 1.0, 0.0, 1.0, TYPE_RGB);
   mpColorCycle[5].SetColorValue( 0.0, 1.0, 1.0, TYPE_RGB);
}

//----------------------------------------------------------

ColorValue DistinctColorGenerator::GenerateNewColor()
{
   int innerCycleNr = mColorsGenerated % 6;
   int outerCycleNr = mColorsGenerated / 6;
   int cycleSize = pow( 2, (int)(log((double)(outerCycleNr)) / log( 2.0 ) ) );
   int insideCycleCounter = outerCycleNr % cyclesize;

   if ( outerCycleNr == 0)
   {
      mFactor = 255;
   }
   else
   {
      mFactor = ( 256 / ( 2 * cycleSize ) ) + ( insideCycleCounter * ( 256 / cycleSize ) );
   }

   ColorValue newColor = mpColorCycle[innerCycleNr] * mFactor;

   mColorsGenerated++;
   return newColor;
}