def Monotone(p): print "" if(len(p) <= 3): return 0 PlotPolygon(p) d = dcel() d.createDCELfromPolygon(p) TriangMonotoneUsingDCEL(d) return 0
def Monotone(p):
print ""
if len(p) <= 3:
return 0
PlotPolygon(p)
d = dcel()
d.createDCELfromPolygon(p)
TriangMonotoneUsingDCEL(d)
return 0
def LeePreparata(p):
print ""
if(len(p) <= 3):
return 0
PlotPolygon(p)
n = len(p)
t = avl()
d = dcel()
d.createDCELfromPolygon(p)
od = orderedDCEL(d, p[0], n)
event = MergeSort(p, range(0, n))
for i in range(0, n):
p[event[i]].hilight('yellow')
# Caso 2 - Ponta para cima
if(upSpike(p, event[i])):
node = t.findNode(p[event[i]])
# Caso nao haja trapezio em cima de do ponto evento
if(node == None):
left = leftEdge(p, event[i], n)
trap = trapezoid(p[event[i]], event[i], p[event[i]], p[(event[i]+left)%n], p[event[i]], p[(event[i]-left)%n])
t.insert(trap)
control.sleep ()
# Caso haja um trapezio em cima do ponto evento
else:
node.value.leo.lineto(node.value.led, 'green')
node.value.reo.lineto(node.value.red, 'green')
node.value.top.hilight('green')
control.sleep ()
left = leftEdge(p, event[i], n)
trap1 = trapezoid(p[event[i]], event[i], node.value.leo, node.value.led, p[event[i]], p[(event[i]+left)%n])
trap2 = trapezoid(p[event[i]], event[i], p[event[i]], p[(event[i]-left)%n], node.value.reo, node.value.red)
insertEdgeUsingOd(od, d, event[i], node)
print str(od[event[i]][0].origin)+str(od[node.value.topIndex][0].origin)
od[event[i]][0].origin.lineto(od[node.value.topIndex][0].origin, 'red')
control.sleep ()
node.value.leo.remove_lineto(node.value.led)
node.value.reo.remove_lineto(node.value.red)
node.value.top.unhilight()
t.remove(p[event[i]])
t.insert(trap2)
t.insert(trap1)
# Caso 3 - Ponta para baixo
elif(downSpike(p, event[i])):
node = t.findNode(p[event[i]])
suc = t.sucessor(node)
pred = t.predecessor(node)
node.value.leo.lineto(node.value.led, 'green')
node.value.reo.lineto(node.value.red, 'green')
node.value.top.hilight('green')
# Caso haja dois trapezios em cima do ponto evento
if(suc != None and suc.value.equal(p[event[i]])):
suc.value.leo.lineto(suc.value.led, 'cyan')
suc.value.reo.lineto(suc.value.red, 'cyan')
suc.value.top.hilight('cyan')
control.sleep ()
trap = trapezoid(p[event[i]], event[i], node.value.leo, node.value.led, suc.value.reo, suc.value.red)
if(downSpike(p, node.value.topIndex) and abs(event[i]-node.value.topIndex) > 1):
insertEdgeUsingOd(od, d, event[i], node)
print str(od[event[i]][0].origin)+str(od[node.value.topIndex][0].origin)
od[event[i]][0].origin.lineto(od[node.value.topIndex][0].origin, 'red')
if(downSpike(p, suc.value.topIndex) and abs(event[i]-suc.value.topIndex) > 1):
insertEdgeUsingOd(od, d, event[i], suc)
print str(od[event[i]][0].origin)+str(od[suc.value.topIndex][0].origin)
od[event[i]][0].origin.lineto(od[suc.value.topIndex][0].origin, 'red')
control.sleep ()
node.value.leo.remove_lineto(node.value.led)
node.value.reo.remove_lineto(node.value.red)
node.value.top.unhilight()
suc.value.leo.remove_lineto(suc.value.led)
suc.value.reo.remove_lineto(suc.value.red)
suc.value.top.unhilight()
t.remove(p[event[i]])
t.remove(p[event[i]])
t.insert(trap)
control.sleep ()
elif(pred != None and pred.value.equal(p[event[i]])):
pred.value.leo.lineto(pred.value.led, 'cyan')
pred.value.reo.lineto(pred.value.red, 'cyan')
pred.value.top.hilight('cyan')
control.sleep ()
trap = trapezoid(p[event[i]], event[i], pred.value.leo, pred.value.led, node.value.reo, node.value.red)
if(downSpike(p, node.value.topIndex) and abs(event[i]-node.value.topIndex) > 1):
insertEdgeUsingOd(od, d, event[i], node)
print str(od[event[i]][0].origin)+str(od[node.value.topIndex][0].origin)
od[event[i]][0].origin.lineto(od[node.value.topIndex][0].origin, 'red')
if(downSpike(p, pred.value.topIndex) and abs(event[i]-pred.value.topIndex) > 1):
insertEdgeUsingOd(od, d, event[i], pred)
print str(od[event[i]][0].origin)+str(od[pred.value.topIndex][0].origin)
od[event[i]][0].origin.lineto(od[pred.value.topIndex][0].origin, 'red')
control.sleep ()
node.value.leo.remove_lineto(node.value.led)
node.value.reo.remove_lineto(node.value.red)
node.value.top.unhilight()
pred.value.leo.remove_lineto(pred.value.led)
pred.value.reo.remove_lineto(pred.value.red)
pred.value.top.unhilight()
t.remove(p[event[i]])
t.remove(p[event[i]])
t.insert(trap)
control.sleep ()
# Caso so haja um trapezio em cima do ponto evento
else:
if(downSpike(p, node.value.topIndex) and abs(event[i]-node.value.topIndex) > 1):
insertEdgeUsingOd(od, d, event[i], node)
print str(od[event[i]][0].origin)+str(od[node.value.topIndex][0].origin)
od[event[i]][0].origin.lineto(od[node.value.topIndex][0].origin, 'red')
control.sleep ()
node.value.leo.remove_lineto(node.value.led)
node.value.reo.remove_lineto(node.value.red)
node.value.top.unhilight()
t.remove(p[event[i]])
control.sleep ()
# Caso 1 - Uma aresta para cima e outra para baixo
else:
node = t.findNode(p[event[i]])
node.value.leo.lineto(node.value.led, 'green')
node.value.reo.lineto(node.value.red, 'green')
node.value.top.hilight('green')
if(collinear(node.value.leo, node.value.led, p[event[i]])):
trap = trapezoid(p[event[i]], event[i], p[event[i]], p[(event[i]+downEdge(p, event[i], n))%n], node.value.reo, node.value.red)
else:
trap = trapezoid(p[event[i]], event[i], node.value.leo, node.value.led, p[event[i]], p[(event[i]+downEdge(p, event[i], n))%n])
if(downSpike(p, node.value.topIndex) and abs(event[i]-node.value.topIndex) > 1):
insertEdgeUsingOd(od, d, event[i], node)
print str(od[event[i]][0].origin)+str(od[node.value.topIndex][0].origin)
od[event[i]][0].origin.lineto(od[node.value.topIndex][0].origin, 'red')
control.sleep ()
node.value.leo.remove_lineto(node.value.led)
node.value.reo.remove_lineto(node.value.red)
node.value.top.unhilight()
t.remove(p[event[i]])
t.insert(trap)
control.sleep ()
p[event[i]].unhilight()
control.sleep ()
TriangMonotoneUsingDCEL(d)
return 0
