public Bounds2(Bounds2 original)
{
this.minX = original.minX;
this.minY = original.minY;
this.maxX = original.maxX;
this.maxY = original.maxY;
}
public Bounds2(Bounds2 original)
{
this.minX = original.minX;
this.minY = original.minY;
this.maxX = original.maxX;
this.maxY = original.maxY;
}
/// <summary>
/// Returns the union of two <see cref="GeoBounds"/> objects.
/// </summary>
/// <param name="with"><see cref="GeoBounds"/> object to unite with.</param>
/// <returns>Union of two <see cref="GeoBounds"/> objects.</returns>
public Bounds2 Union(Bounds2 with)
{
if (with == null)
{
throw new ArgumentNullException("with");
}
return(new Bounds2(Math.Min(MinX, with.MinX), Math.Min(MinY, with.MinY),
Math.Max(MaxX, with.MaxX), Math.Max(MaxY, with.MaxY)));
}
/// <summary>
/// Compares the current <see cref="Bounds2"/> object to the specified object for equivalence.
/// </summary>
/// <param name="obj">The <see cref="Bounds2"/> object to test for equivalence with the current object.</param>
/// <returns>
/// <c>true</c> if the two <see cref="Bounds2"/> objects are equal; otherwise, <c>false</c>.
/// </returns>
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
Bounds2 that = obj as Bounds2;
if (that == null)
{
return(false);
}
return(minX.Equals(that.minX) && minY.Equals(that.minY) && maxX.Equals(that.maxX) && maxY.Equals(that.MaxY));
}
private static int OutCodes(Bounds2 bounds, Point2 <double> P)
{
int Code = 0;
if (P.Y > bounds.MaxY)
{
Code += 1; /* code for above */
}
else if (P.Y < bounds.MinY)
{
Code += 2; /* code for below */
}
if (P.X > bounds.MaxX)
{
Code += 4; /* code for right */
}
else if (P.X < bounds.MinX)
{
Code += 8; /* code for left */
}
return(Code);
}
/// <summary>
/// Checks if the object intersects with specified boundaries.
/// </summary>
/// <param name="other">The other boundaries.</param>
/// <returns>
/// <c>True</c> if it intersects, <c>false</c> otherwise.
/// </returns>
public bool IntersectsWith(Bounds2 other)
{
return(IntersectsWith(other.minX, other.minY, other.maxX, other.maxY));
}
private static int OutCodes(Bounds2 bounds, Point2<double> P)
{
int Code = 0;
if (P.Y > bounds.MaxY) Code += 1; /* code for above */
else if (P.Y < bounds.MinY) Code += 2; /* code for below */
if (P.X > bounds.MaxX) Code += 4; /* code for right */
else if (P.X < bounds.MinX) Code += 8; /* code for left */
return Code;
}
public static void Clip(BoundsLineCrossing crossing, Bounds2 bounds)
{
int outCode0, outCode1;
Point2<double> P0 = crossing.P0;
Point2<double> P1 = crossing.P1;
while (true)
{
outCode0 = OutCodes (bounds, P0);
outCode1 = OutCodes (bounds, P1);
crossing.P0 = P0;
crossing.P1 = P1;
if (RejectCheck (outCode0, outCode1))
return;
if (AcceptCheck (outCode0, outCode1))
return;
if (outCode0 == 0)
{
double tempCoord; int tempCode;
tempCoord = P0.X; P0.X = P1.X; P1.X = tempCoord;
tempCoord = P0.Y; P0.Y = P1.Y; P1.Y = tempCoord;
tempCode = outCode0; outCode0 = outCode1; outCode1 = tempCode;
BoundsLineCrossingType tempType;
tempType = crossing.CrossingTypePoint0; crossing.CrossingTypePoint0 = crossing.CrossingTypePoint1; crossing.CrossingTypePoint1 = tempType;
}
if ((outCode0 & 1) != 0)
{
P0.X += (P1.X - P0.X) * (bounds.MaxY - P0.Y) / (P1.Y - P0.Y);
P0.Y = bounds.MaxY;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMaxY;
crossing.HasCrossed = true;
}
else
if ((outCode0 & 2) != 0)
{
P0.X += (P1.X - P0.X) * (bounds.MinY - P0.Y) / (P1.Y - P0.Y);
P0.Y = bounds.MinY;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMinY;
crossing.HasCrossed = true;
}
else
if ((outCode0 & 4) != 0)
{
P0.Y += (P1.Y - P0.Y) * (bounds.MaxX - P0.X) / (P1.X - P0.X);
P0.X = bounds.MaxX;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMaxX;
crossing.HasCrossed = true;
}
else
if ((outCode0 & 8) != 0)
{
P0.Y += (P1.Y - P0.Y) * (bounds.MinX - P0.X) / (P1.X - P0.X);
P0.X = bounds.MinX;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMinX;
crossing.HasCrossed = true;
}
}
}
/// <summary>
/// Returns the union of two <see cref="Bounds2"/> objects.
/// </summary>
/// <param name="with"><see cref="Bounds2"/> object to unite with.</param>
/// <returns>Union of two <see cref="Bounds2"/> objects.</returns>
public Bounds2 Union(Bounds2 with)
{
if (with == null)
throw new ArgumentNullException ("with");
return new Bounds2 (Math.Min (MinX, with.MinX), Math.Min (MinY, with.MinY),
Math.Max (MaxX, with.MaxX), Math.Max (MaxY, with.MaxY));
}
/// <summary>
/// Checks if the object intersects with specified boundaries.
/// </summary>
/// <param name="other">The other boundaries.</param>
/// <returns>
/// <c>True</c> if it intersects, <c>false</c> otherwise.
/// </returns>
public bool IntersectsWith(Bounds2 other)
{
return IntersectsWith (other.minX, other.minY, other.maxX, other.maxY);
}
static public void Clip(BoundsLineCrossing crossing, Bounds2 bounds)
{
int outCode0, outCode1;
Point2 <double> P0 = crossing.P0;
Point2 <double> P1 = crossing.P1;
while (true)
{
outCode0 = OutCodes(bounds, P0);
outCode1 = OutCodes(bounds, P1);
crossing.P0 = P0;
crossing.P1 = P1;
if (RejectCheck(outCode0, outCode1))
{
return;
}
if (AcceptCheck(outCode0, outCode1))
{
return;
}
if (outCode0 == 0)
{
double tempCoord; int tempCode;
tempCoord = P0.X; P0.X = P1.X; P1.X = tempCoord;
tempCoord = P0.Y; P0.Y = P1.Y; P1.Y = tempCoord;
tempCode = outCode0; outCode0 = outCode1; outCode1 = tempCode;
BoundsLineCrossingType tempType;
tempType = crossing.CrossingTypePoint0; crossing.CrossingTypePoint0 = crossing.CrossingTypePoint1; crossing.CrossingTypePoint1 = tempType;
}
if ((outCode0 & 1) != 0)
{
P0.X += (P1.X - P0.X) * (bounds.MaxY - P0.Y) / (P1.Y - P0.Y);
P0.Y = bounds.MaxY;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMaxY;
crossing.HasCrossed = true;
}
else
if ((outCode0 & 2) != 0)
{
P0.X += (P1.X - P0.X) * (bounds.MinY - P0.Y) / (P1.Y - P0.Y);
P0.Y = bounds.MinY;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMinY;
crossing.HasCrossed = true;
}
else
if ((outCode0 & 4) != 0)
{
P0.Y += (P1.Y - P0.Y) * (bounds.MaxX - P0.X) / (P1.X - P0.X);
P0.X = bounds.MaxX;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMaxX;
crossing.HasCrossed = true;
}
else
if ((outCode0 & 8) != 0)
{
P0.Y += (P1.Y - P0.Y) * (bounds.MinX - P0.X) / (P1.X - P0.X);
P0.X = bounds.MinX;
crossing.CrossingTypePoint0 = BoundsLineCrossingType.CrossesMinX;
crossing.HasCrossed = true;
}
}
}
