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Fixed bug in path_to_bezier and added example to smooth_path.

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Adrian Mariano 2020-03-04 22:26:23 -05:00
parent 51af394c24
commit a8ed6214be
2 changed files with 4 additions and 2 deletions
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4
beziers.scad
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@ -332,9 +332,9 @@ function bezier_polyline(bezier, splinesteps=16, N=3) = let(
// closed = set to true for a closed path. Default: false // closed = set to true for a closed path. Default: false
function path_to_bezier(path, tangent, closed=false) = function path_to_bezier(path, tangent, closed=false) =
assert(is_path(path,dim=undef),"Input path is not a valid path") assert(is_path(path,dim=undef),"Input path is not a valid path")
assert(is_undef(tangent) || is_path(tanget,dim=len(path[0])),"Tangent must be a path of the same dimension as the input path") assert(is_undef(tangent) || is_path(tangent,dim=len(path[0])),"Tangent must be a path of the same dimension as the input path")
let( let(
tangent = is_def(tangent)? tangent : path_tangents(path, closed=closed), tangent = is_def(tangent)? [for(t=tangent) unit(t)] : path_tangents(path, closed=closed),
lastpt = len(path) - (closed?0:1) lastpt = len(path) - (closed?0:1)
) )
[for(i=[0:lastpt-1]) each [path[i], path[i]+tangent[i], select(path,i+1)-select(tangent,i+1)], [for(i=[0:lastpt-1]) each [path[i], path[i]+tangent[i], select(path,i+1)-select(tangent,i+1)],

2
rounding.scad
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@ -425,6 +425,8 @@ function _rounding_offsets(edgespec,z_dir=1) =
// stroke(smooth_path(square(4)), width=0.1); // stroke(smooth_path(square(4)), width=0.1);
// Example(2D): Closing the path changes the end tangents // Example(2D): Closing the path changes the end tangents
// polygon(smooth_path(square(4), closed=true)); // polygon(smooth_path(square(4), closed=true));
// Example(2D): You can specify your own tangent values to alter the shape of the curve
// polygon(smooth_path(square(4),tangent=[[-2,-1], [-2,1], [1,2], [2,-1]],closed=true));
// Example(FlatSpin): Works on 3d paths as well // Example(FlatSpin): Works on 3d paths as well
// path = [[0,0,0],[3,3,2],[6,0,1],[9,9,0]]; // path = [[0,0,0],[3,3,2],[6,0,1],[9,9,0]];
// trace_polyline(smooth_path(path),size=.3); // trace_polyline(smooth_path(path),size=.3);