% Transform in an spe file with coords in the 4D space defined by crystal Cartesian coordinates
% and energy transfer. 
% Allows for correction scattering plane (omega, dpsi, gl, gs) - see Tobyfit for conventions
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% It is an interface function to private cal_proj_matrix function, 
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% the interface is used to compare the results, obtained from this function
% with e.g. Mantid results;
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%%   Overloaded methods:
%      sqw/get_test_calc_projections
%      sqw/get_test_calc_projections
%