def on_doubleclick_line(self, event): # On axes
# Get closest point
dists = Point(event.x2d, event.y2d).distance(self._pp)
I, = np.where(dists == dists.min())
if not len(I):
return False
# Remove from pointset
self._pp.Pop(I[0])
self._line1.SetPoints(self._pp)
# Apply
self._a1.Draw()
self.apply()
def on_down(self, event):
if event.button != 1:
return False
if not vv.KEY_SHIFT in event.modifiers:
return False
# Store location
self._active = Point(event.x2d, event.y2d)
# Clear any line object
for l in self._lines:
l.Destroy()
# Create line objects
tmp = Pointset(2)
tmp.append(self._active)
tmp.append(self._active)
l1 = vv.plot(tmp, lc='g', lw='3', axes=self._a2, axesAdjust=0)
l2 = vv.plot(tmp[:1], ls='', ms='.', mc='g', axes=self._a2, axesAdjust=0)
self._lines = [l1, l2]
# Draw
self._a2.Draw()
# Prevent dragging by indicating the event needs no further handling
return True
def OnUp(self, event):
""" Called when the mouse is released (when first pressed down
in the axes).
"""
# Only if a point is active
if self._active is None:
return False
# Get points
p1 = self._active
p2 = Point(event.x2d, event.y2d)
# Add!
self._pp.append(p1)
self._pp.append(p2)
# We're done with this one
self._active = None
# Clear temp line object
if self._line1:
self._line1.Destroy()
self._line1 = None
# Update lines
self._line2.SetPoints(self._pp)
# Draw
self._a.Draw()
def OnDown(self, event):
""" Called when the mouse is pressed down in the axes.
"""
# Only process left mouse button
if event.button != 1:
return False
# Store location
self._active = Point(event.x2d, event.y2d)
# Clear temp line object
if self._line1:
self._line1.Destroy()
# Create line objects
tmp = Pointset(2)
tmp.append(self._active)
tmp.append(self._active)
self._line1 = vv.plot(tmp, lc='r', lw='1', axes=self._a, axesAdjust=0)
# Draw
self._a.Draw()
# Prevent dragging by indicating the event needs no further handling
return True
def on_down_line(self, event): # On line instance
if event.button != 1:
return False
# Get closest point
dists = Point(event.x2d, event.y2d).distance(self._pp)
I, = np.where(dists == dists.min())
if not len(I):
return False
# Store
self._active = I[0]
# Prevent dragging by indicating the event needs no further handling
return True
def on_motion(self, event):
if self._active is None:
return False
# Update line
self._pp[self._active] = Point(event.x2d, event.y2d)
self._line1.SetPoints(self._pp)
# Draw
self._a1.Draw()
def on_doubleclick(self, event): # On axes
# Get new point
p = Point(event.x2d, event.y2d)
# Add to pointset
self._pp.append(p)
self._line1.SetPoints(self._pp)
# Apply
self.apply()
def on_up(self, event):
if self._active is None:
return False
# Get points
p1 = self._active
p2 = Point(event.x2d, event.y2d)
# Add!
self._pp1.append(p1)
self._pp2.append(p2)
# We're done with this one
self._active = None
# Clear any line object
for l in self._lines:
l.Destroy()
# Apply
self.apply()
vv.figure()
a = vv.gca()
# Define points for the line
pp = Pointset(3)
pp.append(0,0,0); pp.append(0,1,0); pp.append(1,2,0); pp.append(0,2,1)
# Create all solids
box = vv.solidBox((0,0,0))
sphere = vv.solidSphere((3,0,0))
cone = vv.solidCone((6,0,0))
pyramid = vv.solidCone((9,0,0), N=4) # a cone with 4 faces is a pyramid
cylinder = vv.solidCylinder((0,3,0),(1,1,2))
ring = vv.solidRing((3,3,0))
teapot = vv.solidTeapot((6,3,0))
line = vv.solidLine(pp+Point(9,3,0), radius = 0.2)
# Let's put a face on that cylinder
# This works because 2D texture coordinates are automatically generated for
# the sphere, cone, cylinder and ring.
im = vv.imread('astronaut.png')
cylinder.SetTexture(im)
# Make the ring green
ring.faceColor = 'g'
# Make the sphere dull
sphere.specular = 0
sphere.diffuse = 0.4
# Show lines in yellow pyramid
def __init__(self, *args, **kwargs):
Point.__init__(self, *args, **kwargs)
self._edges = []
def __str__(self):
""" Make string representation.
"""
s = Point.__str__(self)
s.replace('point', 'node')
#!/usr/bin/env python import numpy as np import visvis as vv from visvis import Point, Pointset app = vv.use() # create random points a = np.random.normal(size=(1000, 3)) pp = Pointset(a) pp *= Point(2, 5, 1) # prepare axes a = vv.gca() a.cameraType = '3d' a.daspectAuto = False # draw points l = vv.plot(pp, ms='.', mc='r', mw='9', ls='', mew=0) l.alpha = 0.1 app.Run()
def __init__(self, *args, **kwargs):
Point.__init__(self, *args, **kwargs)
self._edges = []
def __str__(self):
""" Make string representation.
"""
s = Point.__str__(self)
s.replace('point', 'node')
