def trimEdges(edgeList, pixmap): "accepts a list of tuples ( each represents an edge)" "returns a networkx network of points, based on edges in the pixmap" "the network is in pixel coordinates ( integers )" g = nx.Graph(); errors = 0; for e in edgeList: #print "Trimming Edge",e try: "walk each pixel, trimming it to segments inside the surface" start = pixmap.index(e[0]); end = pixmap.index(e[1]); #print e,start,end result_edges = bres.piecewise_bresenham_line(pixmap.p,start,end ); for re in result_edges: "each of these are on the map" g.add_edge(re[0],re[1] ); except: errors += 1; #print "error trimming." #raise; print "Errors Trimming %d edges" % errors; return g;
def trimEdges(edgeList, pixmap):
"accepts a list of tuples ( each represents an edge)"
"returns a networkx network of points, based on edges in the pixmap"
"the network is in pixel coordinates ( integers )"
g = nx.Graph()
errors = 0
for e in edgeList:
#print "Trimming Edge",e
try:
"walk each pixel, trimming it to segments inside the surface"
start = pixmap.index(e[0])
end = pixmap.index(e[1])
#print e,start,end
result_edges = bres.piecewise_bresenham_line(pixmap.p, start, end)
for re in result_edges:
"each of these are on the map"
g.add_edge(re[0], re[1])
except:
errors += 1
#print "error trimming."
#raise;
print "Errors Trimming %d edges" % errors
return g
def testWirePixmap(face): """ tests drawing a wire while adjusting sharp borders """ PIXEL = 0.01 ; DEFLECTION = PIXEL / 4.0; #get bounding box (xMin,yMin,zMin,xMax,yMax,zMax) = boundingBox([face]); g = nx.Graph(); #adjust boundaries a bit BUFFER=PIXEL*5; #make pixmap pixmap = pixmaptest.pixmap((xMin-BUFFER,yMin-BUFFER),(xMax+BUFFER,yMax+BUFFER),PIXEL); ow = brt.OuterWire(face); boundary = tuplesFromWire(ow,DEFLECTION); for et in Wrappers.pairwise(boundary): p1 = et[0]; p2 = et[1]; g.add_edge(p1,p2); i1 = pixmap.index(p1); i2 = pixmap.index(p2); #print i1,i2,p1,p2 lines = bres.piecewise_bresenham_line(pixmap.p,i1,i2); #add to the graph. this is tricky. we want to add the original locations #to the graph if nothing changed, but we want to add the new locations #to the graph is something did change or new points were added for l in lines: #print "adding edge." g.add_edge(l[0],l[1]); return g;
def testWirePixmap(face):
"""
tests drawing a wire while adjusting sharp borders
"""
PIXEL = 0.01
DEFLECTION = PIXEL / 4.0
#get bounding box
(xMin, yMin, zMin, xMax, yMax, zMax) = boundingBox([face])
g = nx.Graph()
#adjust boundaries a bit
BUFFER = PIXEL * 5
#make pixmap
pixmap = pixmaptest.pixmap((xMin - BUFFER, yMin - BUFFER),
(xMax + BUFFER, yMax + BUFFER), PIXEL)
ow = brt.OuterWire(face)
boundary = tuplesFromWire(ow, DEFLECTION)
for et in Wrappers.pairwise(boundary):
p1 = et[0]
p2 = et[1]
g.add_edge(p1, p2)
i1 = pixmap.index(p1)
i2 = pixmap.index(p2)
#print i1,i2,p1,p2
lines = bres.piecewise_bresenham_line(pixmap.p, i1, i2)
#add to the graph. this is tricky. we want to add the original locations
#to the graph if nothing changed, but we want to add the new locations
#to the graph is something did change or new points were added
for l in lines:
#print "adding edge."
g.add_edge(l[0], l[1])
return g