CApphot:new

CApphot:new

The new method creates an instance of the CApphot class. This method returns to the caller a reference to the object it creates. The calling code must assign this reference to a name (see below). If the object cannot be created, nil is returned.

Note: This method's name uses all lower case to present it as the analog of the C++ new operator. Generally, the names of class methods begin with an uppercase letter but new and delete are different.

Syntax

A = CApphot:new()

Default constructor. The new CApphot A has all properties set to default values.

A = CApphot:new( CApphot2 )

This is a copy constructor. The new CApphot A is initialized to the properties of CApphot2. In place of CApphot and CApphot2, use the actual names of the objects, such as A and A2.

Example

The following example shows the default constructor and destructor pair:

A = CApphot:new()	-- create a new instance of A of the CApphot class.
...	-- other uses of the class go here, between new and delete.
A:delete()	-- deletes the object and its associated memory.

The next example shows the use of the 2 constructors:

A = CApphot:new(A1)	-- copy constructor, duplicates the data in A1
B = CApphot:new()	-- default constructor
B.nRadius1 = 4.5	-- Set the value of nRadius1
B.nRadius2 = 12	-- Set the value of nRadius2
B.nRadius3 = 16	-- Set the value of nRadius3
bSuccess = B:Measure(I,x,y)	-- Measure object at (x,y) in CImage I
Printf("Mag = %lg", B.nMag )	-- result: Mag = 15.256