Algoritmo veloce per la definizione della matrice di trasformazione 4x4 per proiezioni assonometriche oblique generiche

All monocentric projections refer to a similar set of projective configurations; perspective, orthogonal, axonometry (both orthogonal and oblique) and even includes flat anamorphosis. There are also infinite combinations of isometric oblique axonometry, referred to as generic, defined by a projection plane which is not parallel to any of the three fundamental Cartesian planes: currently these projection options are not available in any CAD software. The key advantage of these projective configurations, essentially, is the ability to render as an isometric all possible representation, whatever the direction of projection, thus greatly expanding the possible forms of axonometric representation while maintaining the isometric axes. In this paper a fast algorithm is put forward for the detection of the 4x4 projective transformation matrix, useful for implementation in CAD software.