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34 lines
987 B
Markdown
34 lines
987 B
Markdown
# trim_shape
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Given a tangled-edge shape. This function trims the shape to a non-tangled shape. It's intended to be a helper function after using `bijection_offset`.
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**Since:** 1.3.
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## Parameters
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- `shape_pts` : The shape points.
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- `from` : The index of the start point you want to trim.
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- `to` : The index of the last point you want to trim.
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- `epsilon` : An upper bound on the relative error due to rounding in floating point arithmetic. Default to 0.0001.
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## Examples
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use <hull_polyline2d.scad>;
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use <trim_shape.scad>;
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use <shape_taiwan.scad>;
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use <bijection_offset.scad>;
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use <midpt_smooth.scad>;
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taiwan = shape_taiwan(50);
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offseted = bijection_offset(taiwan, -2);
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trimmed = trim_shape(offseted, 3, len(offseted) - 6);
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smoothed = midpt_smooth(trimmed, 3);
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#hull_polyline2d(taiwan, .1);
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%translate([25, 0, 0])
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hull_polyline2d(offseted, .2);
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hull_polyline2d(smoothed, .1);
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