/// <summary>
/// Calculate the area of intersection of this box and another.
/// </summary>
public AxisAlignedBox Intersection(AxisAlignedBox other)
{
if (IsNull || other.IsNull)
{
return(new AxisAlignedBox());
}
if (IsInfinite)
{
return(new AxisAlignedBox(other));
}
if (other.IsInfinite)
{
return(new AxisAlignedBox(this));
}
Vector3 min = _minimum;
Vector3 max = _maximum;
Vector3 minimum = other.Minimum;
min.MakeCeil(minimum);
Vector3 maximum = other.Maximum;
max.MakeFloor(maximum);
if (min.x < max.x &&
min.y < max.y &&
min.z < max.z)
{
return(new AxisAlignedBox(min, max));
}
return(new AxisAlignedBox());
}
public void Merge(Aabb rhs)
{
Vector3 max = Center + HalfSize;
max.MakeCeil(rhs.Center + rhs.HalfSize);
Vector3 min = Center - HalfSize;
min.MakeFloor(rhs.Center - rhs.HalfSize);
if (float.IsInfinity(max.x) == false &&
float.IsInfinity(max.y) == false &&
float.IsInfinity(max.z) == false)
{
Center = (max + min) * 0.5f;
}
HalfSize = (max - min) * 0.5f;
}
public void Merge(Vector3 points)
{
Vector3 max = Center + HalfSize;
max.MakeCeil(points);
Vector3 min = Center - HalfSize;
min.MakeFloor(points);
if (float.IsInfinity(max.x) == false &&
float.IsInfinity(max.y) == false &&
float.IsInfinity(max.z) == false)
{
Center = (max + min) * 0.5f;
}
HalfSize = (max - min) * 0.5f;
}
/// <summary>Extends the box to encompass the specified point (if needed). </summary>
public void Merge(Vector3 point)
{
if (_extent != Extent.Null)
{
if (_extent != Extent.Finite)
{
if (_extent != Extent.Infinite)
{
throw new Exception(" Should never reach here");
}
}
else
{
_maximum.MakeCeil(point);
_minimum.MakeFloor(point);
}
}
else
{
SetExtents(point, point);
}
}
/// <summary>
/// Merges the passed in box into the current box. The result is the box which encompasses both.
/// </summary>
public void Merge(AxisAlignedBox rhs)
{
if (rhs._extent != Extent.Null &&
_extent != Extent.Infinite)
{
if (rhs._extent == Extent.Infinite)
{
_extent = Extent.Infinite;
}
else if (_extent == Extent.Null)
{
SetExtents(rhs._minimum, rhs._maximum);
}
else
{
Vector3 min = _minimum;
Vector3 max = _maximum;
max.MakeCeil(rhs._maximum);
min.MakeFloor(rhs._minimum);
SetExtents(min, max);
}
}
}
