c++ - Objective-C appropriate use of autorelease? -

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i'm learning objective-c , i'm trying write vector3d class.

in c++ or java function want implement this:

vector3d {   vector3d crossproduct(vector3d in)   {     vector3d result;     result = ...  // maths involving classes variables , input vectors variables.     return result;    } }

now in objective-c can't return object, object pointer. appropriate place use autorelease (before returning?). enable me chain methods on vector3d class (since many methods return object itself) particularly inefficient compared manually allocating , releasing objects? there other commonly used patterns used return objects in objective-c?

example of operations i'd class:

vector3d * vector3d1 = [[vector3d alloc] init]; vector3d * vector3d2 = [[vector3d alloc] init]; vector3d * vector3d3 = [vector3d1 cross [ [vector3d2 normalize ] multiply 1.43f]];

thanks.

yes, appropriate usage of autorelease , in fact people using code expect cross, normalize, , multiply return autoreleased object.


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