private bool Offset_Item(Spectrum_TableItem item, float f, out float v)
{
bool b = true;
//频率落在节点上
if (Math.Abs(f - item.f) < 0.0001f)
{
v = item.v;
}
//频率落在节点的前一个区间
else if (((f - item.f1) > 0.0001f) &&
((item.f - f) > 0.0001f))
{
v = Offset_Linear(item, f, 0);
}
//频率落在节点后一个区间
else if (((f - item.f) > 0.0001f) &&
((item.f2 - f) > 0.0001f))
{
v = Offset_Linear(item, f, 1);
}
else
{
v = 0.0f;
b = false;
}
return(b);
}
private float Offset_Linear(Spectrum_TableItem item, float f, int section)
{
float a = (item.v2 - item.v) / (item.f2 - item.f);
float b = (item.v * item.f2 - item.v2 * item.f) / (item.f2 - item.f);
return(a * f + b);
}
internal void LoadSettings()
{
string s = "";
string s1 = "";
string s2 = "";
tItems = new List <Spectrum_TableItem>();
tItem = new Spectrum_TableItem();
System.IO.StreamReader textReader = new System.IO.StreamReader(fileName);
Spectrum_TableItem tItem_temp;
//加载补偿项
while (!textReader.EndOfStream)
{
s = (textReader.ReadLine()).Trim();
if (String.IsNullOrEmpty(s))
{
continue;
}
s1 = IniFile.GetItemFrom(s, 0, 2);
s2 = IniFile.GetItemFrom(s, 1, 2);
try
{
tItem_temp = new Spectrum_TableItem();
tItem_temp.f = Convert.ToSingle(s1);
tItem_temp.v = Convert.ToSingle(s2);
tItems.Add(tItem_temp);
} catch (System.InvalidCastException)
{
}
}
textReader.Close();
textReader.Dispose();
Processing();
if (tItems.Count > 0)
{
tItem.f1 = tItems[0].f1;
tItem.v1 = tItems[0].v1;
tItem.f = tItems[0].f;
tItem.v = tItems[0].v;
tItem.f2 = tItems[0].f2;
tItem.v2 = tItems[0].v2;
}
else
{
tItem.f1 = float.MaxValue;
tItem.v1 = float.MinValue;
tItem.f = float.MaxValue;
tItem.v = float.MinValue;
tItem.f2 = float.MaxValue;
tItem.v2 = float.MinValue;
}
}