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Adrian Mariano 2022-02-14 18:05:54 -05:00
parent 581b7c2fbc
commit 42d186389c
1 changed files with 10 additions and 9 deletions
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@ -762,7 +762,7 @@ module spiral_sweep(poly, h, r, turns=1, higbee, center, r1, r2, d, d1, d2, higb
// T = path_sweep(tri,path,transforms=true);
// color("red")for(i=[0:20:80]) stroke(apply(T[i],path3d(tri)),width=.1,closed=true);
// color("blue")stroke(reverse(path3d(arc(r=5,N=101,angle=[-20-15,65]))),width=.1,endcap2="arrow2");
// Text:
// Continues:
// If your shape is too large for the curves in the path you can create a situation where the shapes cross each
// other. This results in an invalid polyhedron, which may appear OK when previewed, but will give rise
// to cryptic CGAL errors when rendered with a second object in your model. You may be able to use {{path_sweep2d()}}
@ -776,7 +776,7 @@ module spiral_sweep(poly, h, r, turns=1, higbee, center, r1, r2, d, d1, d2, higb
// T = path_sweep(tri,path,transforms=true);
// color("red")for(i=[0:20:80]) stroke(apply(T[i],path3d(tri)),width=.1,closed=true);
// color("blue")stroke(path3d(xscale(1.5,arc(r=5,N=81,angle=[-70,80]))),width=.1,endcap2="arrow2");
// Text:
// Continues:
// When performing a path sweep, the normal vector of the shape aligns with the tangent vector of the
// path, but this leaves an ambiguity about how the shape is rotated. For 2D paths it is easy to resolve
// this ambiguity by aligning the Y axis in the shape to the Z axis in the swept polyhedron. We can force the
@ -788,13 +788,14 @@ module spiral_sweep(poly, h, r, turns=1, higbee, center, r1, r2, d, d1, d2, higb
// T = path_sweep(tri,path,transforms=true,twist=-60);
// color("red")for(i=[0:20:80]) stroke(apply(T[i],path3d(tri)),width=.1,closed=true);
// color("blue")stroke(path3d(arc(r=5,N=101,angle=[-20,80])),width=.1,endcap2="arrow2");
// Text:
// When the path is full three-dimensional, things can become more complex. You may find that the shape rotates unexpectedly
// around its axis as it traverses the path. Several options provide
// methods for controlling this rotation. You can choose from three different methods for selecting the rotation of your shape.
// None of these methods will produce good, or even valid, results on all inputs, so it is important to select a suitable method.
// You can also add (or remove) twist to the model. This twist adjustment is done uniformly in arc length by default, or you
// can set `twist_by_length=false` to distribute the twist uniformly over the path point list.
// Continues:
// When the path is full three-dimensional, things can become more complex. You may find that the shape rotates
// unexpectedly around its axis as it traverses the path. The `method` parameter allows you to specify how the shapes
// are aligned, resulting in different twist in the resulting polyhedron. You can choose from three different methods
// for selecting the rotation of your shape. None of these methods will produce good, or even valid, results on all
// inputs, so it is important to select a suitable method. You can also explicitly add (or remove) twist to the
// model. This twist adjustment is done uniformly in arc length by default, or you can set `twist_by_length=false` to
// distribute the twist uniformly over the path point list.
// .
// The method is set using the parameter with that name to one of the following:
// .