def CalcScale(self, points, h, v, hittest=False):
"""Returns the proportion by which the xform needs to be scaled to make
the hypot pass through the point.
If hittest is set to true, this func doubles as a hittest, and checks
if the point is inside the line's hitbox."""
xf = Xform(points=points)
a,d,b,e,c,f = xf.coefs
# Get angle of the hypothenuse
angle = polar(((b-a), (e-d)))[1]
# create a rotated triangle and (c,f)->(h,v) vector. This way, the
# hypothenuse is guaranteed to be horizontal, which makes everything
# easier.
xf.rotate(-angle)
l, theta = polar(((h-c), (v-f)))
width,height = rect((l, theta - angle))
# return the result.
# Note that xf.d and xf.e are guaranteed to be equal.
if hittest:
return xf.a < width < xf.b and \
abs(height - xf.d) < self.circle_radius
return height / xf.d
def test_random(self):
x = Xform.random(self.flame, fx=1)
self.assertEquals(x, None)
x = Xform.random(self.flame, fx=0)
self.assertNotEquals(x, None)
self.assertTrue(x in self.flame.xform)
self.assertTrue(x.index, 5)
x.delete()
f = self.flame.final
self.flame.final = None
x = Xform.random(self.flame, fx=1)
self.assertNotEquals(x, None)
if x.isfinal():
self.assertTrue(x is self.flame.final)
self.assertEquals(x.index, None)
else:
self.assertTrue(x in self.flame.xform)
self.assertEquals(x.index, 5)
x.delete()
self.flame.final = f
x = Xform.random(self.flame, fx=0, ident=1)
self.assertNotEquals(x, None)
self.assertTrue(x in self.flame.xform)
self.assertTrue(x.index, 5)
#for k in x.list_variations():
# self.assertEquals(getattr(x, k), 1.0, '%s = %s' % (k, getattr(x, k)))
x.delete()
x = Xform.random(self.flame, fx=0, xw=1)
self.assertNotEquals(x, None)
self.assertTrue(x in self.flame.xform)
self.assertTrue(x.index, 5)
x.delete()
def GenRandomFlame(*a,**k):
if 'numbasic' in k:
nb = k['numbasic']
nxforms=randrange2(2,nb+1,int=int)
else:
nb=0
nxforms = len(a)
f = Flame()
for i in range(nxforms):
if (nb>0):
Xform.random(f,col=float(i)/(nxforms-1),**a[0])
else:
Xform.random(f,col=float(i)/(nxforms-1),**a[i])
f.reframe()
f.gradient.random(hue=(0, 1),saturation=(0, 1),value=(.25, 1),nodes=(4, 6))
return f
