/tags/rel-1-3-24/SWIG/Examples/GIFPlot/Perl5/shadow/runme.pl
Perl | 68 lines | 55 code | 9 blank | 4 comment | 4 complexity | d0f09f15a58b6dd15899d2216c1d009b MD5 | raw file
Possible License(s): LGPL-2.1, Cube, GPL-3.0, 0BSD, GPL-2.0
- # Plot a 3D function
- use gifplot;
- package gifplot;
- # Here is the function to plot
- sub func {
- my $x = shift;
- my $y = shift;
- return 5*cos(2*sqrt($x*$x+$y*$y))*exp(-0.3*sqrt($x*$x+$y*$y));
- }
- # Here are some plotting parameters
- $xmin = -5.0;
- $xmax = 5.0;
- $ymin = -5.0;
- $ymax = 5.0;
- $zmin = -5.0;
- $zmax = 5.0;
- # Grid resolution
- $nxpoints = 60;
- $nypoints = 60;
- $cmap = new gifplot::ColorMap("cmap");
- $frame = new gifplot::FrameBuffer(500,500);
- $frame->clear($BLACK);
- $p3 = new gifplot::Plot3D($frame,$xmin,$ymin,$zmin,$xmax,$ymax,$zmax);
- $p3->lookat(2*($zmax-$zmin));
- $p3->autoperspective(40);
- $p3->rotu(60);
- $p3->rotr(30);
- $p3->rotd(10);
- sub drawsolid {
- $p3->clear($BLACK);
- $p3->start();
- my $dx = 1.0*($xmax-$xmin)/$nxpoints;
- my $dy = 1.0*($ymax-$ymin)/$nypoints;
- my $cscale = 240.0/($zmax-$zmin);
- my $x = $xmin;
- for ($i = 0; $i < $nxpoints; $i++) {
- my $y = $ymin;
- for ($j = 0; $j < $nypoints; $j++) {
- my $z1 = func($x,$y);
- my $z2 = func($x+$dx,$y);
- my $z3 = func($x+$dx,$y+$dy);
- my $z4 = func($x,$y+$dy);
- my $c1 = $cscale*($z1-$zmin);
- my $c2 = $cscale*($z2-$zmin);
- my $c3 = $cscale*($z3-$zmin);
- my $c4 = $cscale*($z4-$zmin);
- my $c = ($c1+$c2+$c3+$c4)/4;
- if ($c < 0) { $c = 0; }
- if ($c > 239) { $c = 239; }
- $p3->solidquad($x,$y,$z1,$x+$dx,$y,$z2,$x+$dx,$y+$dy,$z3,$x,$y+$dy,$z4,$c+16);
- $y = $y + $dy;
- }
- $x = $x + $dx;
- }
- }
- print "Making a nice 3D plot...\n";
- drawsolid();
- $frame->writeGIF($cmap,"image.gif");
- print "Wrote image.gif\n";