9.3.11 CutOff sample

C++ code

mglData a(60,50,40);
a.Modify("-2*((2*x-1)^2 + (2*y-1)^2 + (2*z-1)^4 - (2*z-1)^2 - 0.1)");
gr->Rotate(40,60);
gr->Light(true);
gr->Alpha(true);
gr->CutOff("(z>(x+0.5*y-1)^2-1) & (z>(x-0.5*y-1)^2-1)");
gr->Box();
gr->Surf3(a);

MGL code

new a 60 50 40
modify a '-2*((2*x-1)^2 + (2*y-1)^2 + (2*z-1)^4 - (2*z-1)^2 - 0.1)'
rotate 40 60
light on
alpha on
cut '(z>(x+0.5*y-1)^2-1) & (z>(x-0.5*y-1)^2-1)'
box
surf3 a

Pure C code

HMDT a = mgl_create_data_size(60,50,40);
mgl_data_modify(a,"-2*((2*x-1)^2 + (2*y-1)^2 + (2*z-1)^4 - (2*z-1)^2 - 0.1)",0);
mgl_rotate(gr,40.,60.,0.);
mgl_set_light(gr,1);
mgl_set_alpha(gr,1);
mgl_set_cutoff(gr,"(z>(x+0.5*y-1)^2-1) & (z>(x-0.5*y-1)^2-1)");
mgl_box(gr,1);
mgl_surf3(gr,a,0,3);
mgl_delete_data(a);

Fortran code

integer a, mgl_create_data_size
a = mgl_create_data_size(60,50,40);
call mgl_data_modify(a,'-2*((2*x-1)^2 + (2*y-1)^2 + (2*z-1)^4 - (2*z-1)^2 - 0.1)',0);
call mgl_rotate(gr,40.,60.,0.)
call mgl_set_light(gr,1)
call mgl_set_alpha(gr,1)
call mgl_set_cutoff(gr,'(z>(x+0.5*y-1)^2-1) & (z>(x-0.5*y-1)^2-1)')
call mgl_box(gr,1)
call mgl_surf3(gr,a,'',3)
call mgl_delete_data(a)

Python

a = mglData(61,51,40);
a.Modify("-2*((2*x-1)^2 + (2*y-1)^2 + (2*z-1)^4 - (2*z-1)^2 - 0.1)");
gr.Rotate(40,60);   gr.Light(True);    gr.Alpha(True);
gr.CutOff("(z>(x+0.5*y-1)^2-1) & (z>(x-0.5*y-1)^2-1)");
gr.Box();
gr.Surf3(a);