def drawArcPredicate2():
myscreen = ovdvtk.VTKScreen()
myscreen.camera.SetPosition(0.01, 0, 100 )
myscreen.camera.SetFocalPoint(0, 0, 0)
myscreen.camera.SetClippingRange(-100,3000)
c1 = ovd.Point(0,0)
r1=20
alfa1 = (float(23)/float(360) )* 2*math.pi
alfa2 = (float(123)/float(360) )* 2*math.pi
#alfa2, alfa1 = alfa1, alfa2 # swap
alfa1_dir = ovd.Point( math.cos(alfa1), math.sin(alfa1) )
alfa2_dir = ovd.Point( math.cos(alfa2), math.sin(alfa2) )
p1 = c1 + r1*alfa1_dir
p2 = c1 + r1*alfa2_dir
cw = False
drawVertex(myscreen, c1, ovdvtk.orange, rad=1)
fa1 = ovdvtk.FollowerText(text="c",color=ovdvtk.orange,center=(c1.x+1,c1.y,0),scale=1)
myscreen.addActor(fa1)
drawVertex(myscreen, p1, ovdvtk.green, rad=1)
fa2 = ovdvtk.FollowerText(text="p1",color=ovdvtk.green,center=(p1.x+1,p1.y,0),scale=1)
myscreen.addActor(fa2)
drawVertex(myscreen, p2, ovdvtk.red, rad=1)
fa3 = ovdvtk.FollowerText(text="p2",color=ovdvtk.red,center=(p2.x+1,p2.y,0),scale=1)
myscreen.addActor(fa3)
#drawArc(myscreen, p1, p2, c1, True, ovdvtk.yellow)
#ovdvtk.drawArc(myscreen, p1, p2, (p1-c1).norm(), c1, True, ovdvtk.yellow, da=0.1)
ovdvtk.drawArc(myscreen, p1, p2, (p1-c1).norm(), c1, cw, ovdvtk.orange, da=0.1)
Nmax = 5000
for n in range(Nmax):
p = 100*ovd.Point( random.random()-0.5, random.random()-0.5 )
apex = apex_point(p1,p2,c1,cw,p)
linecolor= ovdvtk.pink
if arc_in_region(p1,p2,c1,cw,p):
linecolor = ovdvtk.lgreen
drawLine(myscreen,p,apex,linecolor)
myscreen.render()
myscreen.iren.Start()
def drawSeg(myscreen, previous, p):
ovdvtk.drawVertex(myscreen, ovd.Point(p[0],p[1]), 0.0001, ovdvtk.red)
if (p[2]==-1): # a line-segment
drawLine(myscreen, previous, p, ovdvtk.yellow)
else: # an arc
prev = ovd.Point(previous[0],previous[1])
target = ovd.Point(p[0],p[1])
radius = p[2]
cw = p[3]
center = ovd.Point(p[4],p[5])
#print "prev ",prev
#print "center ",center
#print "diff ",prev-center
#print "p ",p
ovdvtk.drawArc(myscreen, prev, target, radius, center, cw, ovdvtk.orange)
def drawSeg(myscreen, previous, p):
ovdvtk.drawVertex(myscreen, ovd.Point(p[0], p[1]), 0.0001, ovdvtk.red)
if (p[2] == -1): # a line-segment
drawLine(myscreen, previous, p, ovdvtk.yellow)
else: # an arc
prev = ovd.Point(previous[0], previous[1])
target = ovd.Point(p[0], p[1])
radius = p[2]
cw = p.cw
center = ovd.Point(p[4], p[5])
# print "prev ",prev
# print "center ",center
# print "diff ",prev-center
# print "p ",p
ovdvtk.drawArc(myscreen, prev, target, radius, center, cw, ovdvtk.orange)
def drawArcPredicate2():
myscreen = ovdvtk.VTKScreen()
myscreen.camera.SetPosition(0.01, 0, 100)
myscreen.camera.SetFocalPoint(0, 0, 0)
myscreen.camera.SetClippingRange(-100, 3000)
c1 = ovd.Point(0, 0)
r1 = 20
alfa1 = (float(23) / float(360)) * 2 * math.pi
alfa2 = (float(123) / float(360)) * 2 * math.pi
# alfa2, alfa1 = alfa1, alfa2 # swap
alfa1_dir = ovd.Point(math.cos(alfa1), math.sin(alfa1))
alfa2_dir = ovd.Point(math.cos(alfa2), math.sin(alfa2))
p1 = c1 + r1 * alfa1_dir
p2 = c1 + r1 * alfa2_dir
cw = False
drawVertex(myscreen, c1, ovdvtk.orange, rad=1)
fa1 = ovdvtk.FollowerText(text="c",
color=ovdvtk.orange,
center=(c1.x + 1, c1.y, 0),
scale=1)
myscreen.addActor(fa1)
drawVertex(myscreen, p1, ovdvtk.green, rad=1)
fa2 = ovdvtk.FollowerText(text="p1",
color=ovdvtk.green,
center=(p1.x + 1, p1.y, 0),
scale=1)
myscreen.addActor(fa2)
drawVertex(myscreen, p2, ovdvtk.red, rad=1)
fa3 = ovdvtk.FollowerText(text="p2",
color=ovdvtk.red,
center=(p2.x + 1, p2.y, 0),
scale=1)
myscreen.addActor(fa3)
# drawArc(myscreen, p1, p2, c1, True, ovdvtk.yellow)
# ovdvtk.drawArc(myscreen, p1, p2, (p1-c1).norm(), c1, True, ovdvtk.yellow, da=0.1)
ovdvtk.drawArc(myscreen,
p1,
p2, (p1 - c1).norm(),
c1,
cw,
ovdvtk.orange,
da=0.1)
Nmax = 5000
for n in range(Nmax):
p = 100 * ovd.Point(random.random() - 0.5, random.random() - 0.5)
apex = apex_point(p1, p2, c1, cw, p)
linecolor = ovdvtk.pink
if arc_in_region(p1, p2, c1, cw, p):
linecolor = ovdvtk.lgreen
drawLine(myscreen, p, apex, linecolor)
myscreen.render()
myscreen.iren.Start()
