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# sphere_spiral_extrude
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
- `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.
- `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 >
use < shape_pentagram.scad >
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points_triangles = shape_pentagram(2);
sphere_spiral_extrude(
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shape_pts = points_triangles,
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radius = 40,
za_step = 2,
z_circles = 20,
begin_angle = 90,
end_angle = 450,
vt_dir = "SPI_UP",
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scale = 5
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);
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