4 use Math::Vector::Real;
15 my $slope_angle = 45 * TAU/360;
21 my $sine_angle = TAU/8;
23 my $ballend_xr = $thick/2;
25 my @i_sections = qw(ball0 -6
37 my @j_sections = qw(lin0 2
48 my ($ip,$it, $jp,$jt) = @_;
50 my ($i_offset, $i_outward);
53 ($ip =~ m/0$/ ? -1 : +1),
56 my $i_thickscale = 1.0;
57 my $sine_len = $sine_size * sin($sine_angle);
58 my $sine_height = $sine_size * (1 - cos($sine_angle));
60 if ($ip =~ m/^lin[01]$/) {
61 $i_offset = V( -$lin_len * $it,
64 } elsif ($ip =~ m/^circle$/) {
65 $i_offset = V( 0,0,0 );
66 $i_outward = V( sin($it * TAU/2),
69 } elsif ($ip =~ m/^sine[01]$/) {
70 my $angle = $it * $sine_angle;
71 $i_offset = V( -$sine_size * sin($angle) -$lin_len,
73 +$sine_size * (1 - cos($angle))
75 } elsif ($ip =~ m/^ball[02]$/) {
76 my $angle = $it * TAU/4;
77 my $dx = sin($angle) * $ballend_xr;
78 $i_offset = V( -$lin_len -$sine_len - $dx,
80 +$sine_height + $dx * tan($sine_angle)
82 $i_thickscale = cos($angle);
87 my $j_plus_th = $jp =~ m/2$/ ? $thick : 0;
89 my $i_thick = $thick * $i_thickscale;
90 my $j_p_x = $small_dia/2 + $thick/2;
91 my $j_rs_x = $large_dia/2 + $thick/2;
92 my $j_dqr_x = (1-cos($slope_angle)) * $jcurverad;
93 my $j_q_x = $j_rs_x - $j_dqr_x;
94 my $j_dpq = ($j_q_x - $j_p_x) / asin($slope_angle);
95 #print STDERR "($j_q_x - $j_p_x) / asin($slope_angle); => $j_dpq\n";
97 my $j_q_y = $j_p_y + $j_dpq * cos($slope_angle);
98 my $j_r_y = $j_q_y + sin($slope_angle) * $jcurverad;
100 my $j_qrc_x = $j_rs_x - $jcurverad;
101 my $j_qrc_y = $j_r_y;
106 if ($jp =~ m/^curveE$/) {
107 my $angle = ($jt + 1) * TAU/2 - $slope_angle;
108 $j_x = $j_p_x + $i_thick/2 * cos($angle);
109 $j_y = $j_p_y + $i_thick/2 * sin($angle);
110 } elsif ($jp =~ m/^curve[12]$/) {
111 my $angle = $slope_angle * $jt;
112 my $outwards = $jp =~ m/1/ ? -1 : +1;
113 $j_x = $j_qrc_x + cos($angle) * ($jcurverad + $outwards * $i_thick/2);
114 $j_y = $j_qrc_y - sin($angle) * ($jcurverad + $outwards * $i_thick/2);
115 } elsif ($jp =~ m/^lin0$/) {
116 $j_x = $j_rs_x + $i_thick * (+0.5 - $jt);
123 # print STDERR "@_ $j_x $j_y $i_offset $i_outward\n";
131 sub get_sections_ptvals {
134 while (my $name = shift @_) {
136 push @out, $last_ptval;
138 my $count = shift @_;
139 my $neg = sub { $_[0] };
142 $neg = sub { 1- $_[0] };
144 foreach (my $ix = 0; $ix < $count; $ix++) {
145 push @out, [ $name, $neg->($ix/$count) ];
147 $last_ptval = [ $name, $neg->(1.0) ];
159 foreach my $pval (@_) {
160 my $pix = $point_indices{$pval}
161 //= ((push @points, $pval), $#points);
162 return if grep { $pix eq $_ } @pixs;
165 push @triangles, \@pixs;
169 my @ipts = get_sections_ptvals(@i_sections);
170 my @jpts = get_sections_ptvals(@j_sections);
172 foreach my $ipt (@ipts) {
174 foreach my $jpt (@jpts) {
175 push @row, &point(@$ipt, @$jpt);
179 foreach (my $qi=0; $qi<$#ipts; $qi++) { # i direction does not wrap
181 foreach (my $qj=0; $qj<@jpts; $qj++) { # j direction does wrap
182 my $qj2 = ($qj+1) % @jpts;
183 my $p0 = $sheet[$qi][$qj];
184 triangle($p0, $sheet[$qi2][$qj], $sheet[$qi2][$qj2]);
185 triangle($p0, $sheet[$qi2][$qj2], $sheet[$qi][$qj2]);
192 return "[".(join ',', @$v)."]";
196 print "module ImplHeadCup(){ polyhedron(points=[\n" or die $!;
197 print pv($_),",\n" or die $! foreach @points;
198 print "],faces=[\n" or die $!;
199 print pv($_),",\n" or die $! foreach @triangles;
200 print "],convexity=10); }\n" or die $!;
201 print <<END or die $!;
202 implheadcup_large_dia = $large_dia;
203 implheadcup_thick = $thick;