////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Subtracts the shape of the specified <code>Area</code> from the
* shape of this <code>Area</code>.
* The resulting shape of this <code>Area</code> will include
* areas that were contained only in this <code>Area</code>
* and not in the specified <code>Area</code>.
* <pre>
* // Example:
* Area a1 = new Area([triangle 0,0 => 8,0 => 0,8]);
* Area a2 = new Area([triangle 0,0 => 8,0 => 8,8]);
* a1.subtract(a2);
*
* a1(before) - a2 = a1(after)
*
* ################ ################
* ############## ############## ##
* ############ ############ ####
* ########## ########## ######
* ######## ######## ########
* ###### ###### ######
* #### #### ####
* ## ## ##
* </pre>
* @param rhs the <code>Area</code> to be subtracted from the
* current shape
* @throws NullPointerException if <code>rhs</code> is null
*/
public void Subtract(Area rhs)
{
_curves = new AreaOp.SubOp().Calculate(_curves, rhs._curves);
InvalidateBounds();
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Sets the shape of this <code>Area</code> to the intersection of
* its current shape and the shape of the specified <code>Area</code>.
* The resulting shape of this <code>Area</code> will include
* only areas that were contained in both this <code>Area</code>
* and also in the specified <code>Area</code>.
* <pre>
* // Example:
* Area a1 = new Area([triangle 0,0 => 8,0 => 0,8]);
* Area a2 = new Area([triangle 0,0 => 8,0 => 8,8]);
* a1.intersect(a2);
*
* a1(before) intersect a2 = a1(after)
*
* ################ ################ ################
* ############## ############## ############
* ############ ############ ########
* ########## ########## ####
* ######## ########
* ###### ######
* #### ####
* ## ##
* </pre>
* @param rhs the <code>Area</code> to be intersected with this
* <code>Area</code>
* @throws NullPointerException if <code>rhs</code> is null
*/
public void Intersect(Area rhs)
{
_curves = new AreaOp.IntOp().Calculate(_curves, rhs._curves);
InvalidateBounds();
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Sets the shape of this <code>Area</code> to be the combined area
* of its current shape and the shape of the specified <code>Area</code>,
* minus their intersection.
* The resulting shape of this <code>Area</code> will include
* only areas that were contained in either this <code>Area</code>
* or in the specified <code>Area</code>, but not in both.
* <pre>
* // Example:
* Area a1 = new Area([triangle 0,0 => 8,0 => 0,8]);
* Area a2 = new Area([triangle 0,0 => 8,0 => 8,8]);
* a1.exclusiveOr(a2);
*
* a1(before) xor a2 = a1(after)
*
* ################ ################
* ############## ############## ## ##
* ############ ############ #### ####
* ########## ########## ###### ######
* ######## ######## ################
* ###### ###### ###### ######
* #### #### #### ####
* ## ## ## ##
* </pre>
* @param rhs the <code>Area</code> to be exclusive ORed with this
* <code>Area</code>.
* @throws NullPointerException if <code>rhs</code> is null
*/
public void ExclusiveOr(Area rhs)
{
_curves = new AreaOp.XorOp().Calculate(_curves, rhs._curves);
InvalidateBounds();
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Tests whether the geometries of the two <code>Area</code> objects
* are equal.
* This method will return false if the argument is null.
* @param other the <code>Area</code> to be compared to this
* <code>Area</code>
* @return <code>true</code> if the two geometries are equal;
* <code>false</code> otherwise.
*/
public bool Equals(Area other)
{
// REMIND: A *much* simpler operation should be possible...
// Should be able to do a curve-wise comparison since all Areas
// should evaluate their curves in the same top-down order.
if (other == this)
{
return true;
}
if (other == null)
{
return false;
}
ArrayList c = new AreaOp.XorOp().Calculate(_curves, other._curves);
return c.Count == 0;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Creates a new <code>Area</code> object that contains the same
* geometry as this <code>Area</code> transformed by the specified
* <code>AffineTransform</code>. This <code>Area</code> object
* is unchanged.
* @param t the specified <code>AffineTransform</code> used to transform
* the new <code>Area</code>
* @throws NullPointerException if <code>t</code> is null
* @return a new <code>Area</code> object representing the transformed
* geometry.
*/
public Area CreateTransformedArea(AffineTransform t)
{
Area a = new Area(this);
a.Transform(t);
return a;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Adds the shape of the specified <code>Area</code> to the
* shape of this <code>Area</code>.
* The resulting shape of this <code>Area</code> will include
* the union of both shapes, or all areas that were contained
* in either this or the specified <code>Area</code>.
* <pre>
* // Example:
* Area a1 = new Area([triangle 0,0 => 8,0 => 0,8]);
* Area a2 = new Area([triangle 0,0 => 8,0 => 8,8]);
* a1.add(a2);
*
* a1(before) + a2 = a1(after)
*
* ################ ################ ################
* ############## ############## ################
* ############ ############ ################
* ########## ########## ################
* ######## ######## ################
* ###### ###### ###### ######
* #### #### #### ####
* ## ## ## ##
* </pre>
* @param rhs the <code>Area</code> to be added to the
* current shape
* @throws NullPointerException if <code>rhs</code> is null
*/
public void Add(Area rhs)
{
_curves = new AreaOp.AddOp().Calculate(_curves, rhs._curves);
InvalidateBounds();
}
