FabLab_Chemnitz/mightyscape-1.1-deprecated
FabLab_Chemnitz/mightyscape-1.1-deprecated
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add option to affine spirals

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This commit is contained in:
Mario Voigt 2021-10-21 16:18:36 +02:00
parent ea47217cd0
commit dc2dc15aee
2 changed files with 12 additions and 7 deletions
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1
extensions/fablabchemnitz/affine_spirals/affine_spirals.inx
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@ -7,6 +7,7 @@
<param name="num_lines" type="int" min="1" max="100" gui-text="Depth">3</param>
<param name="num_petals" type="int" min="2" max="100" gui-text="petals">2</param>
<param name="shrink_ratio" type="float" min="0.01" max="0.99" precision="2" gui-text="shrink factor">0.8</param>
<param name="noses" type="bool" gui-text="Enabled noses">true</param>
</page>
</param>
<effect>

16
extensions/fablabchemnitz/affine_spirals/affine_spirals.py
View File

@ -15,19 +15,22 @@ def ff(v, ww=.25, ds=.4):
r,u = exp(-ds*x), cos(pi*ww*y) + 1J*sin(pi*ww*y)
return r*u
def mk_plugs(pts):
def mk_plugs(pts, noses):
#returns a list of complex representing a plug type segment
segs = [fit_plug(end_pts) for end_pts in zip(pts,pts[1:]) ]
segs = [fit_plug(end_pts, noses) for end_pts in zip(pts,pts[1:]) ]
tmp = []
for seg in segs:
tmp.extend(seg)
return tmp
def fit_plug(ss):
def fit_plug(ss, noses):
a,b = ss
rot = complex(b-a)
pts = [0,.45,.4 + .15*1J, .6 + .15*1J, .55, 1]
if noses is True:
return [rot*z + a for z in pts]
else:
return ss
def pts2curve(cplxs):
'''makes a polyline path element from a list of complex
@ -46,7 +49,8 @@ class AffineSpirals(inkex.EffectExtension):
pars.add_argument("--num_lines", type=int, default=3)
pars.add_argument("--num_petals", type=int, default=3)
pars.add_argument("--shrink_ratio", type=float, default=3)
pars.add_argument("--active-tab", default='title')
pars.add_argument("--active-tab")
pars.add_argument("--noses", type=inkex.Boolean, default=True)
def calc_unit_factor(self):
unit_factor = self.svg.unittouu(str(1.0) + self.options.units)
@ -82,9 +86,9 @@ class AffineSpirals(inkex.EffectExtension):
payload = []
for y in range(-NP,NP):
mpts = [ff(z,ww=1./NP, ds=SF) for z in line(npts=NN, y0=y)]
payload.append(mk_plugs(mpts))
payload.append(mk_plugs(mpts, self.options.noses))
mpts = [ff(z,ww=1./NP, ds=SF) for z in line(npts=NN, y0=y,sgn=-1 )]
payload.append(mk_plugs(mpts))
payload.append(mk_plugs(mpts, self.options.noses))
payload = [pts2curve(cc) for cc in payload]
payload = ' '.join(payload)