Hello, list. I need to build a 3d graph in the logarithmic scale and
with some condition, that crops the graph in the xy plane.
Let me provide an simple example:
Maxima 5.29.1 http://maxima.sourceforge.net
using Lisp SBCL 1.0.40.0.debian
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) load("draw");
(%o1) /usr/share/maxima/5.29.1/share/draw/draw.lisp
(%i2) func(x,y):= if x^2+y^2<1000 then false else abs(x*y);
2 2
(%o2) func(x, y) := if x + y < 1000 then false else abs(x y)
(%i3) draw3d(
xu_grid=50,
yv_grid=50,
terminal = 'wxt,
font= "Helvetica",
color=yellow,
logx=true,
logy=true,
logz=true,
explicit(
func(x,y),
x,10, 100000,
y,10,10000),
user_preamble="
set pm3d at sb;
set ticscale 1,0.5;
set ytics offset 0;
set palette rgbformulae 2,13,10;
set xtics offset 0;
set xlabel 'x';
set title 'some expr';
set mxtics 2;
set size 1, 1;
set mytics 2;
set yrange [10:20000];
set view 57, 244;
set border 4095 front linetype -1;
"
);
(%o3) [gr3d(explicit)]
It happens, that the density of grid lines on the surface is different.
In the beginning of the axis the density is too low. In the end of the
axis the density is too big.
As a result maxima cuts off the square instead of circle.
So, is there any way to crop circle for provided example ?
P.S. people that have maple can do this without problems.