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34 lines
1.3 KiB
Markdown
34 lines
1.3 KiB
Markdown
# sphere_spiral_extrude
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Extrudes a 2D shape along the path of a sphere spiral.
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When using this module, you should use points to represent the 2D shape. If your 2D shape is not solid, indexes of triangles are required. See [sweep](https://openhome.cc/eGossip/OpenSCAD/lib3x-sweep.html) for details.
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## Parameters
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- `shape_pts` : A list of points represent a shape. See the example below.
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- `radius` , `za_step`, `z_circles`, `begin_angle`, `end_angle`, `vt_dir`, `rt_dir` : See [sphere_spiral](https://openhome.cc/eGossip/OpenSCAD/lib3x-sphere_spiral.html) for details.
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- `twist` : The number of degrees of through which the shape is extruded.
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- `scale` : Scales the 2D shape by this value over the length of the extrusion. Scale can be a scalar or a vector.
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- `triangles` : `"SOLID"` (default), `"HOLLOW"` or user-defined indexes. See [sweep](https://openhome.cc/eGossip/OpenSCAD/lib3x-sweep.html) for details.
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## Examples
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use <sphere_spiral_extrude.scad>
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use <shape_pentagram.scad>
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points_triangles = shape_pentagram(2);
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sphere_spiral_extrude(
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shape_pts = points_triangles,
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radius = 40,
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za_step = 2,
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z_circles = 20,
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begin_angle = 90,
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end_angle = 450,
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vt_dir = "SPI_UP",
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scale = 5
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);
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