I always wondered why 3D points in OpenGL, Direct3D and in general computer graphics were always represented as (x,y,z,w) (i.e. why do we use four dimensions to represent a 3D point, whatâs the w for?). This representation of coordinates with the extra dimension is know as homogeneous coordinates.
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2. Butt weld end pipe fittings. 3. Flanged end pipe fittings. The components used in piping system post details about the various components. These are used changing a direction, joining different sizes of pipes, taking a branch-off, etc. are generally referred to as Pipe Fittings.