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https://github.com/BelfrySCAD/BOSL2.git
synced 2024-12-29 00:09:41 +00:00
Fixed bug which produced too few segments in round_corners with
circular rounding. Corrected $fn values for various examples.
This commit is contained in:
Adrian Mariano
parent
f2d26b6513
commit
bab69faf13
1 changed files with 19 additions and 23 deletions
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@ -8,7 +8,6 @@
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// include <BOSL2/rounding.scad>
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// ```
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//////////////////////////////////////////////////////////////////////
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include <beziers.scad>
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include <structs.scad>
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@ -117,9 +116,9 @@ include <structs.scad>
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// Example(Med2D): Circular rounding, different at every corner, some corners left unrounded
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// shape = [[0,0], [10,0], [15,12], [6,6], [6, 12], [-3,7]];
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// radii = [1.8, 0, 2, 0.3, 1.2, 0];
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// polygon(round_corners(shape, radius = radii), $fn=128);
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// polygon(round_corners(shape, radius = radii),$fn=64);
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// color("red") down(.1) polygon(shape);
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// Example(Med2D): Continuous curvature rounding, different at every corner, with varying smoothness parameters as well, and `$fs` set very small
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// Example(Med2D): Continuous curvature rounding, different at every corner, with varying smoothness parameters as well, and `$fs` set very small. Note that `$fa` is ignored here with method set to "smooth".
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// shape = [[0,0], [10,0], [15,12], [6,6], [6, 12], [-3,7]];
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// cuts = [1.5,0,2,0.3, 1.2, 0];
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// k = [0.6, 0.5, 0.5, 0.7, 0.3, 0.5];
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@ -131,7 +130,6 @@ include <structs.scad>
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// polygon(round_corners(shape, method="chamfer", cut=1));
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// color("red") down(.1) polygon(shape);
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// Example(Med3D): 3D printing test pieces to display different curvature shapes. You can see the discontinuity in the curvature on the "C" piece in the rendered image.
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// include <BOSL2/skin.scad>
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// ten = square(50);
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// cut = 5;
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// linear_extrude(height=14) {
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@ -330,9 +328,8 @@ function _circlecorner(points, parm) =
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center = r/sin(angle) * unit(prev+next)+points[1],
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start = points[1]+prev*d,
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end = points[1]+next*d
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)
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arc(max(3,angle/180*segs(norm(start-center))), cp=center, points=[start,end]);
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) // 90-angle is half the angle of the circular arc
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arc(max(3,(90-angle)/180*segs(r)), cp=center, points=[start,end]);
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// Used by offset_sweep and convex_offset_extrude:
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@ -435,7 +432,8 @@ function _rounding_offsets(edgespec,z_dir=1) =
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// Example(2D): Here's the square again with less smoothing.
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// polygon(smooth_path(square(4), size=.25,closed=true));
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// Example(2D): Here's the square with a size that's too big to achieve, so you get the maximum possible curve:
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// polygon(smooth_path(square(4), size=4, closed=true));
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// color("green")stroke(square(4), width=0.1,closed=true);
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// stroke(smooth_path(square(4), size=4, closed=true),closed=true,width=.1);
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// Example(2D): You can alter the shape of the curve by specifying your own arbitrary tangent values
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// polygon(smooth_path(square(4),tangents=1.25*[[-2,-1], [-4,1], [1,2], [6,-1]],size=0.4,closed=true));
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// Example(2D): Or you can give a different size for each segment
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@ -548,11 +546,11 @@ function smooth_path(path, tangents, size, relsize, splinesteps=10, uniform=fals
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//
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// Example: Rounding a star shaped prism with postive radius values
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// star = star(5, r=22, ir=13);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=48);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=24);
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// offset_sweep(rounded_star, height=20, bottom=os_circle(r=4), top=os_circle(r=1), steps=15);
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// Example: Rounding a star shaped prism with negative radius values
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// star = star(5, r=22, ir=13);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=48);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=24);
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// offset_sweep(rounded_star, height=20, bottom=os_circle(r=-4), top=os_circle(r=-1), steps=15);
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// Example: Unexpected corners in the result even with `offset="round"` (the default), even with offset_maxstep set small.
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// triangle = [[0,0],[10,0],[5,10]];
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@ -565,7 +563,7 @@ function smooth_path(path, tangents, size, relsize, splinesteps=10, uniform=fals
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// offset_sweep(triangle, height=6, bottom = os_circle(r=-2),steps=16,offset_maxstep=0.01);
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// Example: Here is the star chamfered at the top with a teardrop rounding at the bottom. Check out the rounded corners on the chamfer. Note that a very small value of `offset_maxstep` is needed to keep these round. Observe how the rounded star points vanish at the bottom in the teardrop: the number of vertices does not remain constant from layer to layer.
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// star = star(5, r=22, ir=13);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=48);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=24);
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// offset_sweep(rounded_star, height=20, bottom=os_teardrop(r=4), top=os_chamfer(width=4,offset_maxstep=.1));
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// Example: We round a cube using the continous curvature rounding profile. But note that the corners are not smooth because the curved square collapses into a square with corners. When a collapse like this occurs, we cannot turn `check_valid` off.
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// square = square(1);
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@ -615,7 +613,7 @@ function smooth_path(path, tangents, size, relsize, splinesteps=10, uniform=fals
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// }
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// Example: Star shaped box
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// star = star(5, r=22, ir=13);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=48);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=24);
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// thickness = 2;
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// ht=20;
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// difference(){
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@ -627,12 +625,12 @@ function smooth_path(path, tangents, size, relsize, splinesteps=10, uniform=fals
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// }
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// Example: A profile defined by an arbitrary sequence of points.
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// star = star(5, r=22, ir=13);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=48);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=24);
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// profile = os_profile(points=[[0,0],[.3,.1],[.6,.3],[.9,.9], [1.2, 2.7],[.8,2.7],[.8,3]]);
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// offset_sweep(reverse(rounded_star), height=20, top=profile, bottom=profile);
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// Example: Parabolic rounding
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// star = star(5, r=22, ir=13);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=48);
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// rounded_star = round_corners(star, cut=flatten(repeat([.5,0],5)), $fn=24);
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// offset_sweep(rounded_star, height=20, top=os_profile(points=[for(r=[0:.1:2])[sqr(r),r]]),
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// bottom=os_profile(points=[for(r=[0:.2:5])[-sqrt(r),r]]));
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// Example: This example uses a sine wave offset profile. Note that because the offsets occur sequentially and the path grows incrementally the offset needs a very fine resolution to produce the proper result. Note that we give no specification for the bottom, so it is straight.
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@ -1661,21 +1659,19 @@ function bezier_patch_degenerate(patch, splinesteps=16, reverse=false) =
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right_degen = select(patch[0],-1) == select(select(patch,-1),-1),
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samplepts = list_range(splinesteps+1)/splinesteps
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)
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top_degen && bot_degen && left_degen && right_degen ?
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echo("fully degenerate case")
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top_degen && bot_degen && left_degen && right_degen ? // fully degenerate case
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[repeat([patch[0][0]],4), EMPTY_VNF] :
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top_degen && bot_degen ?
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let( hhdf=echo("double degenerate (top/bot)"),
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top_degen && bot_degen ? // double degenerate case (top/bot)
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let(
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pts = bezier_points(subindex(patch,0), samplepts)
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)
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[[pts,pts,[pts[0]],[select(pts,-1)]], EMPTY_VNF] :
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left_degen && right_degen ?
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left_degen && right_degen ? // double degenerate case (sides)
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let(
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fda=echo("double degenerate (sides)"),
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pts = bezier_points(patch[0], samplepts)
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)
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[[[pts[0]], [select(pts,-1)], pts, pts], EMPTY_VNF] :
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!top_degen && !bot_degen ?
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!top_degen && !bot_degen ? // non-degenerate case
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let(
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k=echo("non-degenerate case"),
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pts = bezier_patch_points(patch, samplepts, samplepts)
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@ -1684,7 +1680,7 @@ function bezier_patch_degenerate(patch, splinesteps=16, reverse=false) =
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[subindex(pts,0), subindex(pts,len(pts)-1), pts[0], select(pts,-1)],
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vnf_vertex_array(pts, reverse=reverse)
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] :
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bot_degen ?
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bot_degen ? // only bottom is degenerate
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let(
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result = bezier_patch_degenerate(reverse(patch), splinesteps=splinesteps, reverse=!reverse)
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)
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@ -1692,7 +1688,7 @@ function bezier_patch_degenerate(patch, splinesteps=16, reverse=false) =
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[reverse(result[0][0]), reverse(result[0][1]), (result[0][3]), (result[0][2])],
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result[1]
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] :
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// at this point top_degen is true
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// at this point top_degen is true // only top is degenerate
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let(
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full_degen = patch[1][0] == select(patch[1],-1),
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rowmax = full_degen ? list_range(splinesteps+1) :
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