Functions densz, densy, densx draw density plot on plane perpendicular to corresponding axis. One of possible application is drawing projections of 3D field.
MGL code:
call 'prepare3d' title 'Dens[XYZ] sample':rotate 50 60:box densx {sum c 'x'} '' -1:densy {sum c 'y'} '' 1:densz {sum c 'z'} '' -1
C++ code:
void smgl_dens_xyz(mglGraph *gr) { mglData c; mgls_prepare3d(&c); if(big!=3) gr->Title("Dens[XYZ] sample"); gr->Rotate(50,60); gr->Box(); gr->DensX(c.Sum("x"),0,-1); gr->DensY(c.Sum("y"),0,1); gr->DensZ(c.Sum("z"),0,-1); }