/// <summary>
/// Copy constructor that copies the polygon given.
/// </summary>
public PolySimple(PolySimple poly)
{
// Copy the fields
m_Contributes = poly.m_Contributes;
// Copy the points
foreach (PointF p in poly.m_List)
{
m_List.Add(new PointF(p.X, p.Y));
}
}
/// <summary>
/// Translates the polygons and returns the results as a new
/// polygon.
/// </summary>
public IPoly Translate(double dx, double dy)
{
// Create a new polygon
PolySimple poly = new PolySimple();
// Go through those elements
for (int j = 0; j < PointCount; j++)
{
// Get the points
double x = dx + GetX(j);
double y = dy + GetY(j);
// Add it
poly.Add(x, y);
}
// Return the results
return(poly);
}
/// <summary>
/// Copy constructor that copies the polygon given.
/// </summary>
public PolySimple(PolySimple poly)
{
// Copy the fields
m_Contributes = poly.m_Contributes;
// Copy the points
foreach (PointF p in poly.m_List)
m_List.Add(new PointF(p.X, p.Y));
}
/// <summary>
/// Translates the polygons and returns the results as a new
/// polygon.
/// </summary>
public IPoly Translate(double dx, double dy)
{
// Create a new polygon
PolySimple poly = new PolySimple();
// Go through those elements
for (int j = 0; j < PointCount; j++)
{
// Get the points
double x = dx + GetX(j);
double y = dy + GetY(j);
// Add it
poly.Add(x, y);
}
// Return the results
return poly;
}
/**
* Return true if the given object is equal to this one.
* <p>
* <strong>WARNING:</strong> This method failse if the first point
* appears more than once in the list.
*/
public override bool Equals(object obj)
{
// See if we can cast the object
if (!(obj is PolySimple))
{
return(false);
}
PolySimple that = (PolySimple)obj;
// Compare the sizees
int this_num = this.m_List.Count;
int that_num = that.m_List.Count;
if (this_num != that_num)
{
return(false);
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// !!! WARNING: This is not the greatest algorithm. It fails if !!!
// !!! the first point in "this" poly appears more than once. !!!
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
if (this_num > 0)
{
double this_x = this.GetX(0);
double this_y = this.GetY(0);
int that_first_index = -1;
int that_index = 0;
for (that_index = 0; (that_first_index == -1) && (that_index < that_num); that_index++)
{
double that_x = that.GetX(that_index);
double that_y = that.GetY(that_index);
if ((this_x == that_x) && (this_y == that_y))
{
that_first_index = that_index;
}
}
if (that_first_index == -1)
{
return(false);
}
that_index = that_first_index;
for (int this_index = 0; this_index < this_num; this_index++)
{
this_x = this.GetX(this_index);
this_y = this.GetY(this_index);
double that_x = that.GetX(that_index);
double that_y = that.GetY(that_index);
if ((this_x != that_x) || (this_y != that_y))
{
return(false);
}
that_index++;
if (that_index >= that_num)
{
that_index = 0;
}
}
}
return(true);
}
