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import graph3;
import grid3;
import palette;
currentlight=Viewport;
if(settings.render <= 0) settings.prc=false;
currentprojection=orthographic(1,2,13);
size(400,300,IgnoreAspect);
real f(pair z) {return cos(2*pi*z.x)*sin(2*pi*z.y);}
surface s=surface(f,(-1/2,-1/2),(1/2,1/2),20,Spline);
s.colors(palette(s.map(zpart),Rainbow()));
draw(s);
scale(true);
xaxis3(Label("$x$",0.5),Bounds,InTicks);
yaxis3(Label("$y$",0.5),Bounds,InTicks);
zaxis3(Label("$z$",0.5),Bounds,InTicks(beginlabel=false));
grid3(XYZgrid);
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