Merge branch 'master' into master

comparisons.scad

@@ -897,10 +897,10 @@ function group_sort(list, idx) =
 // Description:
 //   Given a list of integer group numbers, and an equal-length list of values,
 //   returns a list of groups with the values sorted into the corresponding groups.
-//   Ie: if you have a groups index list of [2,3,2] and values of ["A","B","C"], then
-//   the values "A" and "C" will be put in group 2, and "B" will be in group 3.
+//   Ie: if you have a groups index list of `[2,3,2]` and values of `["A","B","C"]`, then
+//   the values `"A"` and `"C"` will be put in group 2, and `"B"` will be in group 3.
 //   Groups that have no values grouped into them will be an empty list.  So the
-//   above would return [[], [], ["A","C"], ["B"]]
+//   above would return `[[], [], ["A","C"], ["B"]]`
 // Arguments:
 //   groups = A list of integer group index numbers.
 //   values = A list of values to sort into groups.

gears.scad

@@ -570,7 +570,7 @@ function _inherit_gear_thickness(thickness,dflt=10) =
 //   mate at a 90 degree angle because if it did, its cone could not meet the center of the planar bevel gear.
 //   If you request a larger shaft angle, the teeth of the bevel gear will tilt inward, producing an internal bevel gear.
 //   Gears with this design are rarely used.  The mate of an interior gear is always an exterior gear.  
-// Figure(VPT=[-1.07698,0.67915,-2.25898],VPD=263.435,VPR=[69.7,0,49.3],NoAxes): Internal bevel gear (yellow) mated to an external bevel gear (blue) to achieve a 135 degree shaft angle.  
+// Figure(Med,VPT=[-1.07698,0.67915,-2.25898],VPD=263.435,VPR=[69.7,0,49.3],NoAxes): Internal bevel gear (yellow) mated to an external bevel gear (blue) to achieve a 135 degree shaft angle.  
 //   ang=135;
 //   bevel_gear(mod=3,35,15,ang,spiral=0,cone_backing=false);
 //      down(15)cyl(h=40,d=3,$fn=16,anchor=BOT);
@@ -3492,7 +3492,7 @@ function _gear_tooth_profile(
 //     spur_gear2d(mod=mod, teeth=gear_data[0][1], profile_shift=gear_data[0][2], gear_spin=gear_data[0][3]);  //sun
 //   color("red")move_copies(gear_data[2][4])
 //     spur_gear2d(mod=mod, teeth=gear_data[2][1], profile_shift=gear_data[2][2], gear_spin=gear_data[2][3][$idx]);
-// Example(2D,Med,NoAxes,Anim,Frames=45,VPT=[-0.125033,0.508151,-66.3877],VPR=[0,0,0],VPD=192.044): In this example we request a sun/carrier ratio of 3.6 and get exactly that ratio.  The carrier shown as the blue pentagon moves very slowly as the central sun turns.  The ring is fixed.  
+// Example(2D,Med,NoAxes,Anim,FrameMS=60,Frames=90,VPT=[-0.125033,0.508151,-66.3877],VPR=[0,0,0],VPD=192.044): In this example we request a sun/carrier ratio of 3.6 and get exactly that ratio.  The carrier shown as the blue pentagon moves very slowly as the central sun turns.  The ring is fixed.  
 //   mod=1;
 //   gear_data = planetary_gears(mod=mod, n=5, max_teeth=70, sun_carrier=3.6, gear_spin=3.6*360/5*$t);
 //   ring_gear2d(mod=mod, teeth=gear_data[1][1], profile_shift=gear_data[1][2], gear_spin=gear_data[1][3],backing=2);
@@ -3502,13 +3502,14 @@ function _gear_tooth_profile(
 //   color("red")move_copies(gear_data[2][4])
 //       spur_gear2d(mod=mod, teeth=gear_data[2][1], profile_shift=gear_data[2][2], gear_spin=gear_data[2][3][$idx]);
 // Example(3D,Med,NoAxes,Anim,Frames=7,FrameMS=50,VPT=[0.128673,0.24149,0.651451],VPR=[38.5,0,21],VPD=222.648): Here we request a sun/ring ratio of 3 and it is exactly achieved.  The carrier, shown in blue, is fixed.  This example is shown with helical gears.  It is important to remember to flip the sign of the helical angle for the planet gears.  
+//   $fn=81;
 //   mod=1;
 //   helical=25;
 //   gear_data = planetary_gears(mod=mod, n=4, max_teeth=82, sun_ring=3, helical=helical,gear_spin=360/27*$t);
 //   ring_gear(mod=mod, teeth=gear_data[1][1], profile_shift=gear_data[1][2], helical=helical, gear_spin=gear_data[1][3],backing=4,thickness=7);
 //   color("blue"){
 //       move_copies(gear_data[2][4]) cyl(h=12,d=4);
-//       down(10)linear_extrude(height=3)scale(1.2)polygon(gear_data[2][4]);
+//       down(9)linear_extrude(height=3)scale(1.2)polygon(gear_data[2][4]);
 //   }    
 //   spur_gear(mod=mod, teeth=gear_data[0][1], profile_shift=gear_data[0][2], helical=helical, gear_spin=gear_data[0][3]);  //sun
 //   color("red")move_copies(gear_data[2][4])

skin.scad

@@ -986,7 +986,7 @@ function rotate_sweep(
         style=style
     ) :
     let(
-        steps = segs(max_x),
+        steps = ceil(segs(max_x) * angle / 360) + 1,
         skmat = down(min_y) * skew(sxz=shift.x/h, syz=shift.y/h) * up(min_y),
         transforms = [
             if (angle==360) for (i=[0:1:steps-1]) skmat * rot([90,0,360-i*360/steps]),
@@ -1027,7 +1027,6 @@ module rotate_sweep(
     max_y = bounds[1].y;
     h = max_y - min_y;
     check2 = assert(min_x>=0, "Input region must exist entirely in the X+ half-plane.");
-    steps = segs(max_x);
     if (!is_undef(texture)) {
         _textured_revolution(
             shape,
@@ -1047,6 +1046,7 @@ module rotate_sweep(
             spin=spin, orient=orient
         ) children();
     } else {
+        steps = ceil(segs(max_x) * angle / 360) + 1;
         skmat = down(min_y) * skew(sxz=shift.x/h, syz=shift.y/h) * up(min_y);
         transforms = [
             if (angle==360) for (i=[0:1:steps-1]) skmat * rot([90,0,360-i*360/steps]),

turtle3d.scad

@@ -368,7 +368,7 @@ function _rotpart(T) = [for(i=[0:3]) [for(j=[0:3]) j<3 || i==3 ? T[i][j] : 0]];
 //                       ["move", seg1_len, "grow", seg1_bot_ID/seg2_bot_ID]
 //                    ],
 //                    state=UP, transforms=true);
-//   back_half()      // Remove this to get a usable part
+//   back_half(s=300)    // Remove this to get a usable part
 //     sweep(circle(d=seg1_bot_OD, $fn=128), trans, closed=true);
 // Example(3D): Closed spiral
 //   include<BOSL2/skin.scad>

version.scad

@@ -9,7 +9,7 @@
 //////////////////////////////////////////////////////////////////////
 
 
-BOSL_VERSION = [2,0,664];
+BOSL_VERSION = [2,0,667];
 
 
 // Section: BOSL Library Version Functions