[OpenSCAD] trying to modify Sweep
jon at jonbondy.com
Tue Jan 2 16:15:03 EST 2018
I'm trying to do something that seems conceptually simple to me, but it
Rather than passing a parameter-less shape() function into sweep(), I am
passing a function with one parameter, the scale. This should allow me
to use a circular cross section to create a
snake-that-swallowed-a-grapefruit shape, by varying the scale dynamically.
In the implementation of sweep() I changed this function, as follows (I
calculate to_3d() of the shape() each time):
function sweep_points() = flatten([for (i=[0:pathlen])
I renamed sweep.scad to be sweep-jon.scad. While sweep-jon.scad
compiles without errors, the invocation code (below) fails with"Ignoring
unknown function 'shape'" and then "PolySet has degenerate polygons".
What am I missing?
function f(a) = [18*sin(360*a), 18-18*cos(360*a*0.7), 36*sin(360*a/2)];
function shape(d) =
[for (i=[1:10:360]) [d*sin(i), d*cos(i)]];
step = 0.005;
path = [for (t=[0:step:1-step]) f(t)];
path_transforms = construct_transform_path(path);
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