- Are you aware of the difference between handle and value classes? From your code fragments, I conclude that you anticipate the behavior of a handle class. Thus, the class must inherit from the handle class.
- One must use some convention to distinguish between class properties and local variables. It is confusing to use the same name for a property and a local variable - to say the least. A property the shall always be referred to with the full name, obj.PropertyName, e.g. obj.Height.
Here is an example, which illustrates what I believe you try to do.
>> clear all, clear classes
>> tank_a = MyTankClass;
>> display( tank_a )
Height: 0.000000
DeltaHeight:
DeltaTime:
>> Update( tank_a, 17, 5 )
>> display( tank_a )
Height: 5.000000
DeltaHeight: 5.000000
DeltaTime: 17.000000
where
classdef MyTankClass < handle
properties ( Access = private )
Height = 0;
DeltaHeight
DeltaTime
end
methods
function Update( obj, time, height )
obj.DeltaTime = time;
obj.DeltaHeight = height;
obj.Height = obj.Height + obj.DeltaHeight;
end
function display( obj )
fprintf( 'Height: %f\nDeltaHeight: %f\nDeltaTime: %f\n' ...
, obj.Height, obj.DeltaHeight, obj.DeltaTime )
end
end
end
