public CLine(CPoint2D point1, CPoint2D point2)
{
try
{
if (CPoint2D.SamePoints(point1, point2))
{
string errMsg = "The input points are the same";
InvalidInputGeometryDataException ex = new InvalidInputGeometryDataException(errMsg);
throw ex;
}
//Point1 and Point2 are different points:
if (Math.Abs(point1.X - point2.X) < ConstantValue.SmallValue) //vertical line
{
Initialize((float)Math.PI / 2, point1);
}
else if (Math.Abs(point1.Y - point2.Y) < ConstantValue.SmallValue) //Horizontal line
{
Initialize(0, point1);
}
else //normal line
{
float m = (point2.Y - point1.Y) / (point2.X - point1.X);
float alphaInRad = (float)Math.Atan(m);
Initialize(alphaInRad, point1);
}
}
catch (Exception e)
{
ServiceRegistration.Get <ILogger>().Error("Error creating CLine", e);
}
}
private void Initialize(float angleInRad, CPoint2D point)
{
//angleInRad should be between 0-Pi
try
{
//if ((angleInRad<0) ||(angleInRad>Math.PI))
if (angleInRad > 2 * Math.PI)
{
string errMsg = string.Format("The input line angle" + " {0} is wrong. It should be between 0-2*PI.", angleInRad);
InvalidInputGeometryDataException ex = new InvalidInputGeometryDataException(errMsg);
throw ex;
}
if (Math.Abs(angleInRad - Math.PI / 2) < ConstantValue.SmallValue) //vertical line
{
a = 1;
b = 0;
c = -point.X;
}
else //not vertical line
{
a = (float)-Math.Tan(angleInRad);
b = 1;
c = -a * point.X - b * point.Y;
}
}
catch (Exception e)
{
ServiceRegistration.Get<ILogger>().Error("Error initializing CLine", e);
}
}
private void Initialize(float angleInRad, CPoint2D point)
{
//angleInRad should be between 0-Pi
try
{
//if ((angleInRad<0) ||(angleInRad>Math.PI))
if (angleInRad > 2 * Math.PI)
{
string errMsg = string.Format("The input line angle" + " {0} is wrong. It should be between 0-2*PI.", angleInRad);
InvalidInputGeometryDataException ex = new InvalidInputGeometryDataException(errMsg);
throw ex;
}
if (Math.Abs(angleInRad - Math.PI / 2) < ConstantValue.SmallValue) //vertical line
{
a = 1;
b = 0;
c = -point.X;
}
else //not vertical line
{
a = (float)-Math.Tan(angleInRad);
b = 1;
c = -a * point.X - b * point.Y;
}
}
catch (Exception e)
{
ServiceRegistration.Get <ILogger>().Error("Error initializing CLine", e);
}
}
public CLine(CPoint2D point1, CPoint2D point2)
{
try
{
if (CPoint2D.SamePoints(point1, point2))
{
string errMsg = "The input points are the same";
InvalidInputGeometryDataException ex = new InvalidInputGeometryDataException(errMsg);
throw ex;
}
//Point1 and Point2 are different points:
if (Math.Abs(point1.X - point2.X) < ConstantValue.SmallValue) //vertical line
{
Initialize((float)Math.PI / 2, point1);
}
else if (Math.Abs(point1.Y - point2.Y) < ConstantValue.SmallValue) //Horizontal line
{
Initialize(0, point1);
}
else //normal line
{
float m = (point2.Y - point1.Y) / (point2.X - point1.X);
float alphaInRad = (float)Math.Atan(m);
Initialize(alphaInRad, point1);
}
}
catch (Exception e)
{
ServiceRegistration.Get<ILogger>().Error("Error creating CLine", e);
}
}