private ESRI.ArcGIS.Display.IColor GetCombinedColor(IColor pColor1, IColor pColor2, EColorCombinationType eCombinationMethod, IColor pOriginColor)
{
// combines the input colors based on m_eColorCombinationMethod
// (11/08/04) -- RGB and enuLabLChColorRamp aren't used by GUI
IColor pOutColor = null;
long MyOLE_COLOR = 0; // As OLE_COLOR in VB6
IRgbColor pMainRGBColor = null;
IRgbColor pVariationRGBColor = null;
IRgbColor pMergedRGBColor = null;
bool bOK = false;
IAlgorithmicColorRamp pAlgorithmicCR = null;
// if either of the colors are null, then don't run the color through any algorithm,
// instead, just return the other color. if both are null, then return a null color
if (pColor1.NullColor)
{
pOutColor = pColor2;
}
else if (pColor2.NullColor)
{
pOutColor = pColor1;
}
else if (eCombinationMethod == EColorCombinationType.enuComponents)
{
// HSV components
// create a new HSV color
IHsvColor pHSVDrawColor = null;
pHSVDrawColor = new HsvColor();
// get HSV values from Color1 and Color2 and assign to pHSVDrawColor
IHsvColor pHSVColor1 = null;
IHsvColor pHSVColor2 = null;
// (new 4/27/04) didn't think I had to do this...
//pHSVColor1 = pColor1
//pHSVColor2 = pColor2
pHSVColor1 = new HsvColor();
pHSVColor1.RGB = pColor1.RGB;
pHSVColor2 = new HsvColor();
pHSVColor2.RGB = pColor2.RGB;
pHSVDrawColor.Hue = pHSVColor1.Hue;
pHSVDrawColor.Saturation = pHSVColor2.Saturation;
pHSVDrawColor.Value = pHSVColor2.Value;
pOutColor = pHSVDrawColor;
}
else if (eCombinationMethod == EColorCombinationType.enuRGBAverage)
{
// use additive color model to merge the two colors
MyOLE_COLOR = pColor1.RGB;
pMainRGBColor = new RgbColor();
pMainRGBColor.RGB = (int)MyOLE_COLOR;
MyOLE_COLOR = pColor2.RGB;
pVariationRGBColor = new RgbColor();
pVariationRGBColor.RGB = (int)MyOLE_COLOR;
// merged color = RGB average of the two colors
pMergedRGBColor = new RgbColor();
pMergedRGBColor.Red = (pMainRGBColor.Red + pVariationRGBColor.Red) / 2;
pMergedRGBColor.Green = (pMainRGBColor.Green + pVariationRGBColor.Green) / 2;
pMergedRGBColor.Blue = (pMainRGBColor.Blue + pVariationRGBColor.Blue) / 2;
pOutColor = pMergedRGBColor;
}
else if ((eCombinationMethod == EColorCombinationType.enuCIELabColorRamp) | (eCombinationMethod == EColorCombinationType.enuLabLChColorRamp))
{
// use color ramp and take central color between the two colors
pAlgorithmicCR = new AlgorithmicColorRamp();
if (m_eColorCombinationMethod == EColorCombinationType.enuCIELabColorRamp)
pAlgorithmicCR.Algorithm = esriColorRampAlgorithm.esriCIELabAlgorithm;
else
pAlgorithmicCR.Algorithm = esriColorRampAlgorithm.esriLabLChAlgorithm;
pAlgorithmicCR.Size = 3;
pAlgorithmicCR.FromColor = pColor1;
pAlgorithmicCR.ToColor = pColor2;
pAlgorithmicCR.CreateRamp(out bOK);
pOutColor = pAlgorithmicCR.get_Color(1); // middle color in ramp
}
else // EColorCombinationType.enuCIELabMatrix
{
double[] iLab1 = new double[4]; // L, a, b values for Color1
double[] iLab2 = new double[4]; // L, a, b values for Color2
double[] iLabOrig = new double[4]; // L, a, b values for pOriginColor
pColor1.GetCIELAB(out iLab1[0], out iLab1[1], out iLab1[2]);
pColor2.GetCIELAB(out iLab2[0], out iLab2[1], out iLab2[2]);
pOriginColor.GetCIELAB(out iLabOrig[0], out iLabOrig[1], out iLabOrig[2]);
double[] iLabOut = new double[4];
// add color1 vector and color2 vector, then subtract the origin color vector
iLabOut[0] = iLab1[0] + iLab2[0] - iLabOrig[0];
iLabOut[1] = iLab1[1] + iLab2[1] - iLabOrig[1];
iLabOut[2] = iLab1[2] + iLab2[2] - iLabOrig[2];
CorrectLabOutofRange(ref iLabOut[0], ref iLabOut[1], ref iLabOut[2]);
IHsvColor pHSVColor = null;
pHSVColor = new HsvColor();
pHSVColor.SetCIELAB(iLabOut[0], iLabOut[1], iLabOut[2]);
pOutColor = pHSVColor;
}
return pOutColor;
}
