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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.
A = CApphot:new()
Default
constructor. The new CApphot A
has all data members set to default values.
A = CApphot:new( CApphot2 )
This is a copy
constructor. The new CApphot A
is initialized to the data members of CApphot2. In place of CApphot and CApphot2, use the
actual names of the objects, such as A and A2.
The following example shows the default constructor and destructor pair:
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A = CApphot:new() |
-- create a new instance of A of the CApphot class. |
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... |
-- other uses of the class go here, between new and delete. |
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A:delete() |
-- deletes the object and its associated memory. |
The next example shows the use of the 2 constructors:
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A = CApphot:new(A1) |
-- copy constructor, duplicates the data in A1 |
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B = CApphot:new() |
-- default constructor |
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B.nRadius1 = 4.5 |
-- Set the value of nRadius1 |
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B.nRadius2 = 12 |
-- Set the value of nRadius2 |
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B.nRadius3 = 16 |
-- Set the value of nRadius3 |
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bSuccess = B:Measure(I,x,y) |
-- Measure object at (x,y) in CImage I |
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Printf("Mag = %lg", B.nMag ) |
-- result: Mag = 15.256 |