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Merge pull request #1472 from adrianVmariano/master
offset() default fix & planetary gears docfix
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Revar Desmera
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4 changed files with 22 additions and 19 deletions
12
gears.scad
12
gears.scad
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@ -3523,12 +3523,12 @@ function _gear_tooth_profile(
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// mod = The module of the gear, pitch diameter divided by tooth count.
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// diam_pitch = The diametral pitch, or number of teeth per inch of pitch diameter. Note that the diametral pitch is a completely different thing than the pitch diameter.
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// circ_pitch = distance between teeth centers around the pitch circle.
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// ring_carrier = set ring/carrier ratio to this value in a ring driven system, must be between 1 and 2
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// carrier_ring = set carrier/ring ratio to this value in a carrier driven system, must be between 1/2 and 1
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// sun_carrier = set sun/carrier ratio to this value in a sun driven system, must be larger than 2
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// carrier_sun = set carrier/sun ratio to this value in a carrier driven system, must be smaller than 1/2
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// ring_sun = set ring/sun ratio to this value in a ring driven system, must have absolute value larger than 1
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// sun_ring = set sun/ring ratio to this value in a sun driven system, must have absolute value smaller than 1
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// ring_carrier = set ring/carrier transmission ratio to this value in a ring driven system, must be between 1 and 2
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// carrier_ring = set carrier/ring transmission ratio to this value in a carrier driven system, must be between 1/2 and 1
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// sun_carrier = set sun/carrier transmission ratio to this value in a sun driven system, must be larger than 2
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// carrier_sun = set carrier/sun transmission ratio to this value in a carrier driven system, must be smaller than 1/2
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// ring_sun = set ring/sun transmission ratio to this value in a ring driven system, must have absolute value smaller than 1
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// sun_ring = set sun/ring transmission ratio to this value in a sun driven system, must have absolute value larger than 1
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// helical = create gears with specified helical angle. Default: 0
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// gear_spin = rotate the driven gear by this number of degrees. Default:0
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// Example(2D,NoAxes,Anim,Frames=90,FrameMS=30,VPT=[-0.875705,-0.110537,-66.3877],VPR=[0,0,0],VPD=102,Med): In this example we request a ring/carrier ratio of 1.341 and the system produced has a ratio of 4/3. The sun is fixed, the input is carried by the ring, and the carrier, shown as the blue triangle, is the output, rotating approximately in accordance with the requested ratio.
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@ -1585,8 +1585,8 @@ function polygon_normal(poly) =
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// b=30;
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// ofs = 17;
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// curve = [for(theta=[0:10:140]) [a * theta/360*2*PI - b*sin(theta), a-b*cos(theta)-20]];
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// path = deduplicate(concat( reverse(offset(curve,r=ofs)),
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// xflip(offset(curve,r=ofs)),
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// path = deduplicate(concat( reverse(offset(curve,r=ofs,closed=false)),
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// xflip(offset(curve,r=ofs,closed=false)),
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// xflip(reverse(curve)),
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// curve
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// ));
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@ -1612,8 +1612,8 @@ function polygon_normal(poly) =
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// b=30*2/3;
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// ofs = 17*2/3;
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// curve = [for(theta=[0:10:140]) [a * theta/360*2*PI - b*sin(theta), a-b*cos(theta)]];
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// path = deduplicate(concat( reverse(offset(curve,r=ofs)),
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// xflip(offset(curve,r=ofs)),
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// path = deduplicate(concat( reverse(offset(curve,r=ofs,closed=false)),
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// xflip(offset(curve,r=ofs,closed=false)),
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// xflip(reverse(curve)),
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// curve
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// ));
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@ -1628,8 +1628,8 @@ function polygon_normal(poly) =
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// b=30*2/3;
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// ofs = 17*2/3;
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// curve = [for(theta=[0:10:140]) [a * theta/360*2*PI - b*sin(theta), a-b*cos(theta)]];
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// path = deduplicate(concat( reverse(offset(curve,r=ofs)),
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// xflip(offset(curve,r=ofs)),
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// path = deduplicate(concat( reverse(offset(curve,r=ofs,closed=false)),
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// xflip(offset(curve,r=ofs,closed=false)),
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// xflip(reverse(curve)),
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// curve
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// ));
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@ -1193,7 +1193,7 @@ module rabbit_clip(type, length, width, snap, thickness, depth, compression=0.1
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bounds = pointlist_bounds(rounded);
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extrapt = is_pin ? [] : [rounded[0] - [0,extra]];
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finalpath = is_pin ? rounded
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: let(withclearance=offset(rounded, r=-clearance))
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: let(withclearance=offset(rounded, r=-clearance, closed=false))
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concat( [[withclearance[0].x,-extra]],
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withclearance,
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[[-withclearance[0].x,-extra]]);
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15
regions.scad
15
regions.scad
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@ -814,8 +814,10 @@ function _point_dist(path,pathseg_unit,pathseg_len,pt) =
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// Takes a 2D input path, polygon or region and returns a path offset by the specified amount. As with the built-in
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// offset() module, you can use `r` to specify rounded offset and `delta` to specify offset with
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// corners. If you used `delta` you can set `chamfer` to true to get chamfers.
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// For paths and polygons positive offsets make the polygons larger. For paths,
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// positive offsets shift the path to the left, relative to the direction of the path.
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// When `closed=true` (the default), the input is treated as a polygon. If the input is a region it is treated as a collection
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// of polygons. In this case, positive offset values make the shape larger. If you set `closed=false` then the input is treated as a path
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// with distinct start and end points. For paths, positive offsets shifts the path to the left, relative to the direction of the path.
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// Note that a path that happens to end at its starting point is not the same as a polygon and the offset result may differ.
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// .
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// If you use `delta` without chamfers, the path must not include any 180 degree turns, where the path
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// reverses direction. Such reversals result in an offset with two parallel segments, so they cannot be
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@ -863,7 +865,7 @@ function _point_dist(path,pathseg_unit,pathseg_len,pt) =
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// r = offset radius. Distance to offset. Will round over corners.
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// delta = offset distance. Distance to offset with pointed corners.
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// chamfer = chamfer corners when you specify `delta`. Default: false
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// closed = if true path is treate as a polygon. Default: False.
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// closed = if true path is treated as a polygon. Default: True.
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// check_valid = perform segment validity check. Default: True.
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// quality = validity check quality parameter, a small integer. Default: 1.
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// same_length = return a path with the same length as the input. Only compatible with `delta=`. Default: false
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@ -902,7 +904,7 @@ function _point_dist(path,pathseg_unit,pathseg_len,pt) =
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// Example(2D): Open path. The red path moves from left to right as shown by the arrow and the positive offset shifts to the left of the initial red path.
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// sinpath = 2*[for(theta=[-180:5:180]) [theta/4,45*sin(theta)]];
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// stroke(sinpath, width=2, color="red", endcap2="arrow2");
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// stroke(offset(sinpath, r=17.5),width=2);
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// stroke(offset(sinpath, r=17.5,closed=false),width=2);
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// Example(2D,NoAxes): An open path in red with with its positive offset in yellow and its negative offset in blue.
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// seg = [[0,0],[0,50]];
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// stroke(seg,color="red",endcap2="arrow2");
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@ -985,12 +987,13 @@ function _point_dist(path,pathseg_unit,pathseg_len,pt) =
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function offset(
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path, r=undef, delta=undef, chamfer=false,
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closed=false, check_valid=true,
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closed=true, check_valid=true,
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quality=1, return_faces=false, firstface_index=0,
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flip_faces=false, same_length=false
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) =
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assert(!(same_length && return_faces), "Cannot combine return_faces with same_length")
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is_region(path)?
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assert(closed, "cannot set closed=false for a region")
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assert(!return_faces, "return_faces not supported for regions.")
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let(
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ofsregs = [for(R=region_parts(path))
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@ -1035,7 +1038,7 @@ function offset(
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cornercheck = [for(i=idx(goodsegs)) (!closed && (i==0 || i==len(goodsegs)-1))
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|| is_def(sharpcorners[i])
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|| approx(unit(deltas(select(goodsegs,i-1))[0]) * unit(deltas(goodsegs[i])[0]),-1)],
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dummyA = assert(len(sharpcorners)==2 || all(cornercheck),"Two consecutive valid offset segments are parallel but do not meet at their ends, maybe because path contains very short segments that were mistakenly flagged as invalid; unable to compute offset"),
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dummyA = assert(len(sharpcorners)==2 || all(cornercheck),"Two consecutive valid offset segments are parallel but do not meet at their ends, maybe because path contains very short segments that were mistakenly flagged as invalid; unable to compute offset. If you get this error from offset_sweep() try setting ofset=\"delta\""),
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reversecheck =
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!same_length
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|| !(is_def(delta) && !chamfer) // Reversals only a problem in delta mode without chamfers
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