public Color GetColor(double pos)
{
int index = getIndex(pos);
if (index < _colors.Count)
{
ColorPos right = _colors[index];
if (index == 0 || pos == right.Pos)
{
return(right.Color);
}
else
{
ColorPos left = _colors[index - 1];
double rightRatio = (pos - left.Pos) / (right.Pos - left.Pos);
double leftRatio = 1 - rightRatio;
byte r = (byte)(leftRatio * left.Color.R + rightRatio * right.Color.R);
byte g = (byte)(leftRatio * left.Color.G + rightRatio * right.Color.G);
byte b = (byte)(leftRatio * left.Color.B + rightRatio * right.Color.B);
byte a = (byte)(leftRatio * left.Color.A + rightRatio * right.Color.A);
return(Color.FromArgb(a, r, g, b));
}
}
else
{
return(Colors.Transparent);
}
}
public void AddColor(double pos, Color color)
{
ColorPos cp = new ColorPos()
{
Pos = pos, Color = color
};
int index = getIndex(pos);
_colors.Insert(index, cp);
}
