How to convert local co ordinates to cartesian coordinates?

The data to be used in computer graphics must be in a Cartesian coordinates system. If they are in some other coordinate system then we have to convert them in to Cartesian coordinates: Say, if we have an image to be converted. First we will take out its local coordinates based on the shape, size etc. Then, it is transferred in to a world coordinate reference system and later it is converted to normalized device coordinates for the device we are using. After that it is finally converted to the Cartesian Coordinates System.

How to convert local co ordinates to device coordinates

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