X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=poster-tube-lid-parametric.scad.pl;h=64d4d00ebe9f5b472789f5411155e6457b95d8ec;hp=353c7123c6007b0645210c92b1f5d13446046318;hb=c5b9f398993c756ff4446a2ef09c66aa8d58d662;hpb=b6f9009a57d55343c2a0a3a6884cb7f4304308ac

diff --git a/poster-tube-lid-parametric.scad.pl b/poster-tube-lid-parametric.scad.pl
index 353c712..64d4d00 100755
--- a/poster-tube-lid-parametric.scad.pl
+++ b/poster-tube-lid-parametric.scad.pl
@@ -8,7 +8,7 @@ use Data::Dumper;
 
 sub TAU () { pi*2; }
 
-my $thick = 4;
+my $thick = 2.5;
 
 my $small_dia = 20;
 my $large_dia = 30;
@@ -16,22 +16,20 @@ my $slope_angle = 45 * TAU/360;
 my $jcurverad = 5;
 my $tall = 50;
 
-my $lin_len = 10;
-my $lin2_len = 9;
-my $sine_len = 8;
-my $sine_height = 6;
+my $lin_len = 2;
+my $sine_size = 5;
+my $sine_angle = 1.20 * TAU/8;
 
 my $ballend_xr = $thick/2;
 
+my $skew_slope = 0.7;
+
 my @i_sections = qw(ball0  -6
 		    sine0  -10
-		    -
-		    lin0    2
-		    circle 20
+		    lin0    -2
+		    circle 40
 		    lin1    2
 		    sine1  10
-		    -
-		    lin2   -2
 		    ball2   6
 		    -
 		    );
@@ -49,13 +47,17 @@ my @j_sections = qw(lin0    2
 sub point ($$$$) {
     my ($ip,$it, $jp,$jt) = @_;
 
-    my ($i_offset, $i_outward);
+    my ($i_offset);
 
-    $i_outward = V( 0,
-		    ($ip =~ m/0$/ ? -1 : +1),
-		    0 );
+    my $i_outward = V( 0,
+		       ($ip =~ m/0$/ ? -1 : +1),
+		       0 );
+
+    my $i_j_y_angle = 0;
 
     my $i_thickscale = 1.0;
+    my $sine_len = $sine_size * sin($sine_angle);
+    my $sine_height = $sine_size * (1 - cos($sine_angle));
 
     if ($ip =~ m/^lin[01]$/) {
 	$i_offset = V( -$lin_len * $it,
@@ -66,28 +68,30 @@ sub point ($$$$) {
 	$i_outward = V(  sin($it * TAU/2),
 			 -cos($it * TAU/2),
 			 0 );
-    } elsif ($ip =~ m/^lin2$/) {
-	$i_offset = V( -$lin_len -$sine_len - $it*$lin2_len,
-		       0,
-		       +$sine_height );
     } elsif ($ip =~ m/^sine[01]$/) {
-	$i_offset = V( -$lin_len -$it*$sine_len,
+	my $angle = $it * $sine_angle;
+	$i_offset = V( -$lin_len -$sine_size * sin($angle),
 		       0,
-		       $sine_height * ( 0.5 - 0.5*cos( $it*TAU/2 ) )
+		       +$sine_size * (1 - cos($angle))
 		     );
+	$i_j_y_angle = $angle;
     } elsif ($ip =~ m/^ball[02]$/) {
+	$i_j_y_angle = $sine_angle;
 	my $angle = $it * TAU/4;
-	$i_offset = V( -$lin_len -$sine_len
-		       -($ip =~ m/2/ ? $lin2_len : 0)
-		       -sin($angle) * $ballend_xr,
+	my $dx = sin($angle) * $ballend_xr;
+	$i_offset = V( -$lin_len -$sine_len - $dx * cos($sine_angle),
 		       0,
-		       +$sine_height
+		       +$sine_height + $dx * sin($sine_angle)
 		     );
 	$i_thickscale = cos($angle);
     } else {
 	die "$ip ?";
     }
 
+    my $i_j_y_vect = V( sin($i_j_y_angle),
+			0,
+			cos($i_j_y_angle ));
+
     my $j_plus_th = $jp =~ m/2$/ ? $thick : 0;
 
     my $i_thick = $thick * $i_thickscale;
@@ -124,11 +128,18 @@ sub point ($$$$) {
 	die "$jp ?";
     }
 
+    $j_y -= $j_qrc_y;
+
+    if ($j_y > 0) {
+	$i_j_y_vect = V(0,0,1);
+    }
+
 #    print STDERR "@_ $j_x $j_y $i_offset $i_outward\n";
     return
 	$i_offset +
 	$j_x * $i_outward +
-	V(0,0,1) * $j_y +
+	$i_j_y_vect * $j_y +
+	V(0,0,1) * $j_qrc_y +
 	V(0,0,-$tall) ;
 }
 
@@ -158,20 +169,29 @@ our @points;
 our %point_indices;
 our @triangles;
 
+my @ipts;
+my @jpts;
+
+my $qi;
+my $qj;
+
 sub triangle {
     my @pixs;
     foreach my $pval (@_) {
 	my $pix = $point_indices{$pval}
 	    //= ((push @points, $pval), $#points);
-	return if grep { $pix eq $_ } @pixs;
+	if (grep { $pix eq $_ } @pixs) {
+	    print "// elide @{ $ipts[$qi] } @{ $jpts[$qj] }\n";
+	    return;
+	}
 	push @pixs, $pix;
     }
-    push @triangles, \@pixs;
+    push @triangles, [ $qi,$qj, \@pixs ];
 }
 
 sub make_sheet () {
-    my @ipts = get_sections_ptvals(@i_sections);
-    my @jpts = get_sections_ptvals(@j_sections);
+    @ipts = get_sections_ptvals(@i_sections);
+    @jpts = get_sections_ptvals(@j_sections);
     my @sheet;
     foreach my $ipt (@ipts) {
 	my @row = ();
@@ -180,9 +200,9 @@ sub make_sheet () {
 	}
 	push @sheet, \@row;
     }
-    foreach (my $qi=0; $qi<$#ipts; $qi++) { # i direction does not wrap
+    foreach ($qi=0; $qi<$#ipts; $qi++) { # i direction does not wrap
 	my $qi2 = $qi+1;
-	foreach (my $qj=0; $qj<@jpts; $qj++) { # j direction does wrap
+	foreach ($qj=0; $qj<@jpts; $qj++) { # j direction does wrap
 	    my $qj2 = ($qj+1) % @jpts;
 	    my $p0 = $sheet[$qi][$qj];
 	    triangle($p0, $sheet[$qi2][$qj], $sheet[$qi2][$qj2]);
@@ -200,8 +220,14 @@ sub write_out () {
     print "module ImplHeadCup(){ polyhedron(points=[\n" or die $!;
     print pv($_),",\n" or die $! foreach @points;
     print "],faces=[\n" or die $!;
-    print pv($_),",\n" or die $! foreach @triangles;
+    foreach (@triangles) {
+	print pv($_->[2]),", // @{ $ipts[$_->[0]] } @{ $jpts[$_->[1]] }\n" or die $!;
+    }
     print "],convexity=10); }\n" or die $!;
+    print <<END or die $!;
+implheadcup_large_dia = $large_dia;
+implheadcup_thick     = $thick;
+END
 }
 
 make_sheet();