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en:design_guide_rectangular_extrude [2020/12/05 05:21]
JSCAD Editor 		en:design_guide_rectangular_extrude [2020/12/08 06:55] (current)
JSCAD Editor
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 ==== Rectangular Extrude ==== ==== Rectangular Extrude ====
 +
 +{{ :wiki:jscad-extruderectangular.png?nolink | Extrude Rectangular}}
  
 Extrude a rectangle (upright, perpendicular) along the outlines of the two dimensional shape. Extrude a rectangle (upright, perpendicular) along the outlines of the two dimensional shape.
  
-Simplified (openscad like, even though OpenSCAD doesn't provide this) via rectangular_extrude(), where as  +The two dimensional shape is extruded to the ''height'', upwards along the Z axis.
-  * w: width (default: 1),  +
-  * h: height (default: 1),  +
-  * fn: resolution (default: 8), and  +
-  * closed: whether path is closed or not (default: false)+
  
-<code javascript> +//Note: The extrusion process uses Linear Extrude underneath, so the extrusion can be rotated ''twistAngle'' about the Z axis during the extrusion, creating ''twistSteps'' during the extrusion.//
-rectangular_extrude([ [10,10], [-10,10], [-20,0], [-10,-10], [10,-10] ],  // path is an array of 2d coords +
-    {w: 1, h: 3, closed: true}); +
-</code>+
  
-or more low-level  via rectangularExtrude(), with following unnamed variables: +Defaults: 
-  * width of the extrusion, in the z=0 plane +  * size: 1 (width of rectangle during extrusion) 
-  * height of the extrusion in the z direction +  * height : 1
-  * resolution, number of segments per 360 degrees for the curve in a corner +
-  * roundEnds: if true, the ends of the polygon will be rounded, otherwise they will be flat+
  
 <code javascript> <code javascript>
-// first creating a 2D path, and then extrude it +const myshape = extrudeRectangular({height: radiusZ * 2, size: 0.25}, shape1) 
-var path = new CSG.Path2D([ [10,10], [-10,10], [-20,0], [-10,-10], [10,-10] ], /*closed=*/true); +const myshape = extrudeRectangular({height: radiusZ * 2, size: 3, twistAngle: Math.PI / 2, twistSteps: 10}, shape2)
-var csg = path.rectangularExtrude(3, 4, 16, true);   // w, h, resolution, roundEnds +
-return csg;+
 </code> </code>