private void Set_nodeColor_gradient(ref yed_node_color_line_class yED_node_color_line, float nodeValue, float maxValue, float minValue)
{
if (nodeValue <= 0)
{
yED_node_color_line.Hexadecimal_color = Math_class.Get_hexadecimal_code(150, 150, 150);
}
else
{
yED_node_color_line.Hexadecimal_color = Get_hexadecimal_nodeColor_gradient(nodeValue, maxValue, minValue);
}
}
private string Get_hexadecimal_nodeColor_gradient(float nodeValue, float maxValue, float minValue)
{
if (float.IsPositiveInfinity(nodeValue))
{
nodeValue = float.MaxValue;
}
if (float.IsPositiveInfinity(maxValue))
{
maxValue = float.MaxValue;
}
float relative_node_value = (nodeValue - minValue) / (maxValue - minValue);
int red = -1;
int green = -1;
int blue = -1;
int max_blue = 100;
int max_green = 150;
int max_red = 255;
float step_size = 0.33333333333333333333333333333333F;
if (relative_node_value < step_size) // Blue --> green
{
red = 0;
green = (int)Math.Round(relative_node_value / step_size * max_green);
blue = max_blue - (int)Math.Round(relative_node_value / step_size * max_blue);
}
else if ((relative_node_value >= step_size) && (relative_node_value < 2 * step_size)) // Green --> Yellow
{
red = (int)Math.Round((relative_node_value - step_size) / step_size * max_red);
green = max_green;
blue = 0;
}
else // Yellow --> red
{
red = max_red;
green = max_green - (int)Math.Round((relative_node_value - 2 * step_size) / step_size * max_green);
blue = 0;
}
return(Math_class.Get_hexadecimal_code(red, green, blue));
}
