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mobius generator works

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This commit is contained in:
Trammell Hudson 2015-01-03 17:43:53 +01:00
parent 959d62d706
commit 8fd5589fcb
1 changed files with 23 additions and 15 deletions
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38
mobius-maker
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@ -3,10 +3,10 @@
use warnings;
use strict;
my $sections = 16;
my $thickness = 10;
my $sections = 6;
my $thickness = 14;
my $radius = [40,0,0];
my $pi = 3.141519;
my $pi = 2*atan2(1,0);
my $pts = [
v3scale($thickness, [-0.5, -sqrt(3)/4 + sqrt(3)/12, 0]),
@ -91,11 +91,19 @@ sub v3cross
{
my ($u,$v) = @_;
return [
my $c = [
$u->[1]*$v->[2] - $u->[2]*$v->[1],
$u->[2]*$v->[0] - $u->[0]*$v->[2],
$u->[0]*$v->[1] - $u->[1]*$v->[0],
];
my $mag = 0
+ $c->[0]*$c->[0]
+ $c->[1]*$c->[1]
+ $c->[2]*$c->[2]
;
return v3scale(1.0/sqrt($mag), $c);
}
@ -104,20 +112,20 @@ sub triangle
my ($p0, $p1, $p2) = @_;
my $v1 = v3sub($p1, $p0);
my $v2 = v3sub($p2, $p0);
my $n = v3cross($v1, $v2);
my $n = v3cross($v2, $v1);
my $rc = sprintf <<"", $n->[0], $n->[1], $n->[2];
facet normal %f %f %f
facet normal %.4f %.4f %.4f
outer loop
$rc .= sprintf <<"", $p0->[0], $p0->[1], $p0->[2];
vertex %f %f %f
vertex %.4f %.4f %.4f
$rc .= sprintf <<"", $p1->[0], $p1->[1], $p1->[2];
vertex %f %f %f
vertex %.4f %.4f %.4f
$rc .= sprintf <<"", $p2->[0], $p2->[1], $p2->[2];
vertex %f %f %f
vertex %.4f %.4f %.4f
$rc .= <<"";
endloop
@ -158,12 +166,12 @@ sub module
# And now generate the triangles
return ''
. triangle($p00, $p01, $p10)
. triangle($p01, $p02, $p11)
. triangle($p02, $p00, $p12)
. triangle($p10, $p11, $p01)
. triangle($p11, $p12, $p02)
. triangle($p12, $p10, $p00)
. triangle($p00, $p01, $p11)
. triangle($p01, $p02, $p12)
. triangle($p02, $p00, $p10)
. triangle($p11, $p10, $p00)
. triangle($p12, $p11, $p01)
. triangle($p10, $p12, $p02)
;
}