def remesh(self, edgelen=None):
"""Remesh a TriSurface.
edgelen is the suggested edge length
"""
if edgelen is None:
self.getElemEdges()
E = Mesh(self.coords, self.edges, eltype='line2')
edgelen = E.lengths().mean()
tmp = utils.tempFile(suffix='.stl').name
tmp1 = utils.tempFile(suffix='.stl').name
pf.message("Writing temp file %s" % tmp)
self.write(tmp, 'stl')
pf.message("Remeshing using VMTK (edge length = %s)" % edgelen)
cmd = "vmtk vmtksurfaceremeshing -ifile %s -ofile %s -edgelength %s" % (
tmp, tmp1, edgelen)
sta, out = utils.runCommand(cmd)
os.remove(tmp)
if sta:
pf.message("An error occurred during the remeshing.")
pf.message(out)
return None
S = TriSurface.read(tmp1)
os.remove(tmp1)
return S
def run():
reset()
smooth()
lights(True)
S = TriSurface.read(getcfg('datadir')+'/horse.off')
SA = draw(S)
res = askItems([
('direction',[1.,0.,0.]),
('number of sections',20),
('color','red'),
('ontop',False),
('remove surface',False),
])
if not res:
return
d = res['direction']
n = res['number of sections']
c = res['color']
slices = S.slice(dir=d,nplanes=n)
linewidth(2)
draw(slices,color=c,view=None,bbox='last',nolight=True,ontop=res['ontop'])
export({'_HorseSlice_slices':slices})
if res['remove surface']:
undraw(SA)
zoomAll()
def run():
reset()
smooth()
lights(True)
S = TriSurface.read(getcfg('datadir') + '/horse.off')
SA = draw(S)
bb = S.bbox()
bb1 = [1.1 * bb[0] - 0.1 * bb[1], 1.1 * bb[1] - 0.1 * bb[0]]
print(bb)
print(bb1)
res = askItems([
_I('Resolution', 100),
])
if not res:
return
nmax = res['Resolution']
sz = bb1[1] - bb1[0]
step = sz.max() / (nmax - 1)
n = (sz / step).astype(Int)
print(n)
P = Formex(simple.regularGrid(bb1[0], bb1[0] + n * step, n).reshape(-1, 3))
draw(P, marksize=1, color='black')
#drawNumbers(P)
zoomAll()
ind = S.inside(P)
vox = zeros(n + 1, dtype=uint8)
print(vox.shape)
vox1 = vox.reshape(-1)
print(vox1.shape, ind.max())
vox1[ind] = 1
print(vox.max())
P.setProp(vox1)
draw(P, marksize=8)
dirname = askDirname()
chdir(dirname)
# Create output file
if not checkWorkdir():
print("Could not open a directory for writing. I have to stop here")
return
fs = utils.NameSequence('horse', '.png')
clear()
flat()
A = None
for frame in vox:
B = showGreyImage(frame)
saveBinaryImage(frame * 255, fs.next())
undraw(A)
A = B
def run():
reset()
smooth()
lights(True)
S = TriSurface.read(getcfg('datadir')+'/horse.off')
SA = draw(S)
bb = S.bbox()
bb1 = [ 1.1*bb[0]-0.1*bb[1], 1.1*bb[1]-0.1*bb[0]]
print(bb)
print(bb1)
res = askItems([
_I('Resolution',100),
])
if not res:
return
nmax = res['Resolution']
sz = bb1[1]-bb1[0]
step = sz.max() / (nmax-1)
n = (sz / step).astype(Int)
print(n)
P = Formex(simple.regularGrid(bb1[0],bb1[0]+n*step,n).reshape(-1,3))
draw(P, marksize=1, color='black')
#drawNumbers(P)
zoomAll()
ind = S.inside(P)
vox = zeros(n+1,dtype=uint8)
print(vox.shape)
vox1 = vox.reshape(-1)
print(vox1.shape,ind.max())
vox1[ind] = 1
print(vox.max())
P.setProp(vox1)
draw(P, marksize=8)
dirname = askDirname()
chdir(dirname)
# Create output file
if not checkWorkdir():
print("Could not open a directory for writing. I have to stop here")
return
fs = utils.NameSequence('horse','.png')
clear()
flat()
A = None
for frame in vox:
B = showGreyImage(frame)
saveBinaryImage(frame*255,fs.next())
undraw(A)
A = B
def run():
reset()
smooth()
lights(True)
transparent(False)
setView('horse', [20, 20, 0])
S = TriSurface.read(getcfg('datadir') + '/horse.off')
bb = S.bbox()
t = -0.3
bb[0] = (1.0 - t) * bb[0] + t * bb[1]
draw(S, bbox=bb, view='front')
try:
P, n, t = askSlices(S.bbox())
except:
return
a = t / len(P)
F = S.toFormex()
G = []
old = seterr(all='ignore')
setDrawOptions({'bbox': None})
clear()
A = None
for i, p in enumerate(P):
F1, F = F.cutWithPlane(p, -n)
if F1.nelems() > 0:
F1.setProp(i)
G = [g.rot(a, around=p) for g in G]
G.append(F1)
#clear()
B = draw([F, G])
if A:
undraw(A)
A = B
seterr(**old)
x = pf.canvas.width() / 2
y = pf.canvas.height() - 40
T = drawText("No animals got hurt during the making of this movie!",
x,
y,
size=18,
gravity='C')
for i in range(10):
sleep(0.3)
undecorate(T)
sleep(0.3)
decorate(T)
def run():
reset()
smooth()
lights(True)
transparent(False)
setView('horse',[20,20,0])
S = TriSurface.read(getcfg('datadir')+'/horse.off')
bb = S.bbox()
t = -0.3
bb[0] = (1.0-t)*bb[0] + t*bb[1]
draw(S,bbox=bb,view='front')
try:
P,n,t = askSlices(S.bbox())
except:
return
a = t/len(P)
F = S.toFormex()
G = []
old = seterr(all='ignore')
setDrawOptions({'bbox':None})
clear()
A = None
for i,p in enumerate(P):
F1,F = F.cutWithPlane(p,-n)
if F1.nelems() > 0:
F1.setProp(i)
G = [ g.rot(a,around=p) for g in G ]
G.append(F1)
#clear()
B = draw([F,G])
if A:
undraw(A)
A = B
seterr(**old)
x = pf.canvas.width()/2
y = pf.canvas.height() - 40
T = drawText("No animals got hurt during the making of this movie!",x,y,size=18,gravity='C')
for i in range(10):
sleep(0.3)
undecorate(T)
sleep(0.3)
decorate(T)
def gtsset(self,
surf,
op,
filt='',
ext='.tmp',
curve=False,
check=False,
verbose=False):
"""_Perform the boolean/intersection methods.
See the boolean/intersection methods for more info.
Parameters not explained there:
- filt: a filter command to be executed on the gtsset output
- ext: extension of the result file
- curve: if True, an intersection curve is computed, else the surface.
Returns the name of the (temporary) results file.
"""
op = {'+': 'union', '-': 'diff', '*': 'inter'}[op]
options = ''
if curve:
options += '-i'
if check:
options += ' -s'
if not verbose:
options += ' -v'
tmp = utils.tempFile(suffix='.gts').name
tmp1 = utils.tempFile(suffix='.gts').name
tmp2 = utils.tempFile(suffix=ext).name
pf.message("Writing temp file %s" % tmp)
self.write(tmp, 'gts')
pf.message("Writing temp file %s" % tmp1)
surf.write(tmp1, 'gts')
pf.message("Performing boolean operation")
cmd = "gtsset %s %s %s %s %s > %s" % (options, op, tmp, tmp1, filt, tmp2)
sta, out = utils.runCommand(cmd)
os.remove(tmp)
os.remove(tmp1)
if sta or verbose:
pf.message(out)
pf.message("Reading result from %s" % tmp2)
if curve:
res = read_gts_intersectioncurve(tmp2)
else:
res = TriSurface.read(tmp2)
os.remove(tmp2)
return res
def gtsset(self,surf,op,filt='',ext='.tmp',curve=False,check=False,verbose=False):
"""_Perform the boolean/intersection methods.
See the boolean/intersection methods for more info.
Parameters not explained there:
- filt: a filter command to be executed on the gtsset output
- ext: extension of the result file
- curve: if True, an intersection curve is computed, else the surface.
Returns the name of the (temporary) results file.
"""
op = {'+':'union', '-':'diff', '*':'inter'}[op]
options = ''
if curve:
options += '-i'
if check:
options += ' -s'
if not verbose:
options += ' -v'
tmp = utils.tempFile(suffix='.gts').name
tmp1 = utils.tempFile(suffix='.gts').name
tmp2 = utils.tempFile(suffix=ext).name
pf.message("Writing temp file %s" % tmp)
self.write(tmp,'gts')
pf.message("Writing temp file %s" % tmp1)
surf.write(tmp1,'gts')
pf.message("Performing boolean operation")
cmd = "gtsset %s %s %s %s %s > %s" % (options,op,tmp,tmp1,filt,tmp2)
sta,out = utils.runCommand(cmd)
os.remove(tmp)
os.remove(tmp1)
if sta or verbose:
pf.message(out)
pf.message("Reading result from %s" % tmp2)
if curve:
res = read_gts_intersectioncurve(tmp2)
else:
res = TriSurface.read(tmp2)
os.remove(tmp2)
return res
def remesh(self,edgelen=None):
"""Remesh a TriSurface.
edgelen is the suggested edge length
"""
if edgelen is None:
self.getElemEdges()
E = Mesh(self.coords,self.edges,eltype='line2')
edgelen = E.lengths().mean()
tmp = utils.tempFile(suffix='.stl').name
tmp1 = utils.tempFile(suffix='.stl').name
pf.message("Writing temp file %s" % tmp)
self.write(tmp,'stl')
pf.message("Remeshing using VMTK (edge length = %s)" % edgelen)
cmd = "vmtk vmtksurfaceremeshing -ifile %s -ofile %s -edgelength %s" % (tmp,tmp1,edgelen)
sta,out = utils.runCommand(cmd)
os.remove(tmp)
if sta:
pf.message("An error occurred during the remeshing.")
pf.message(out)
return None
S = TriSurface.read(tmp1)
os.remove(tmp1)
return S
def run():
reset()
smooth()
lights(True)
S = TriSurface.read(getcfg('datadir') + '/horse.off')
SA = draw(S)
res = askItems([
('direction', [1., 0., 0.]),
('number of sections', 20),
('color', 'red'),
('ontop', False),
('remove surface', False),
])
if not res:
return
d = res['direction']
n = res['number of sections']
c = res['color']
slices = S.slice(dir=d, nplanes=n)
linewidth(2)
draw(slices,
color=c,
view=None,
bbox='last',
nolight=True,
ontop=res['ontop'])
export({'_HorseSlice_slices': slices})
if res['remove surface']:
undraw(SA)
zoomAll()
def run():
global wviewer,pcolor,px,py
clear()
smooth()
lights(True)
transparent(False)
view('iso')
image = None
scaled_image = None
# read the teapot surface
T = TriSurface.read(getcfg('datadir')+'/teapot.off')
xmin,xmax = T.bbox()
T= T.trl(-T.center()).scale(4./(xmax[0]-xmin[0])).setProp(2)
draw(T)
# default image file
dfilename = getcfg('datadir')+'/benedict_6.jpg'
wviewer = ImageView(dfilename,maxheight=200)
res = askItems([
_I('filename',dfilename,text='Image file',itemtype='button',func=selectImage),
wviewer,
_I('px',4,text='Number of patches in x-direction'),
_I('py',6,text='Number of patches in y-direction'),
_I('kx',30,text='Width of a patch in pixels'),
_I('ky',30,text='Height of a patch in pixels'),
_I('scale',1.0,text='Scale factor'),
_I('trl',[-0.4,-0.1,2.],itemtype='point',text='Translation'),
_I('method',choices=['projection','intersection']),
])
if not res:
return
globals().update(res)
nx,ny = px*kx,py*ky # pixels
print('The image is reconstructed with %d x %d pixels'%(nx, ny))
F = Formex('4:0123').replic2(nx,ny).centered()
if image is None:
print("Loading image")
image = loadImage(filename)
wpic,hpic = image.width(),image.height()
print("Image size is %sx%s" % (wpic,hpic))
if image is None:
return
# Create the colors
color,colortable = image2glcolor(image.scaled(nx,ny))
# Reorder by patch
pcolor = color.reshape((py,ky,px,kx,3)).swapaxes(1,2).reshape(-1,kx*ky,3)
print("Shape of the colors array: %s" % str(pcolor.shape))
mH = makeGrid(px,py,'Quad8')
try:
ratioYX = float(hpic)/wpic
mH = mH.scale(ratioYX,1) # Keep original aspect ratio
except:
pass
mH0 = mH.scale(scale).translate(trl)
dg0 = draw(mH0,mode='wireframe')
zoomAll()
zoom(0.5)
print("Create %s x %s patches" % (px,py))
# Create the transforms
base = makeGrid(1,1,'Quad8').coords[0]
patch = makeGrid(kx,ky,'Quad4').toMesh()
d0 = drawImage(mH0,base,patch)
if method == 'projection':
pts = mH0.coords.projectOnSurface(T,[0.,0.,1.],'-f')
dg1 = d1 = [] # to allow dummy undraw
else:
mH1 = mH.rotate(-30.,0).scale(0.5).translate([0.,-.7,-2.])
dg1 = draw(mH1,mode='wireframe')
d1 = drawImage(mH1,base,patch)
x = connect([mH0.asPoints(),mH1.asPoints()])
dx = draw(x)
print("Creating intersection with surface")
pts, il, it, mil=intersectSurfaceWithSegments2(T, x, max1xperline=True)
if len(x) != len(pts):
print("Some of the lines do not intersect the surface:")
print(" %d lines, %d intersections %d missing" % (len(x),len(pts),len(mil)))
return
dp = draw(pts, marksize=6, color='white')
#print pts.shape
mH2 = Formex(pts.reshape(-1,8,3))
if method == 'projection':
x = connect([mH0.points(),mH2.points()])
dx = draw(x)
print("Create projection mapping using the grid points")
d2 = drawImage(mH2.trl([0.,0.,0.01]),base,patch)
# small translation to make sure the image is above the surface, not cutting it
print("Finally show the finished image")
undraw(dp);
undraw(dx);
undraw(d0);
undraw(d1);
undraw(dg0);
undraw(dg1);
view('front')
zoomAll()
sleep(1)
transparent()
totalrot = res['total rot']
xmin,xmax = bb[:,axis]
dx = (xmax-xmin) / nslices
x = arange(nslices+1) * dx
N = unitVector(axis)
P = [ bb[0]+N*s for s in x ]
return P,N,totalrot
else:
return None
reset()
smooth()
lights(True)
transparent(False)
setView('horse',[20,20,0])
S = TriSurface.read(getcfg('datadir')+'/horse.off')
bb = S.bbox()
t = -0.3
bb[0] = (1.0-t)*bb[0] + t*bb[1]
draw(S,bbox=bb,view='front')
try:
P,n,t = askSlices(S.bbox())
except:
exit()
a = t/len(P)
F = S.toFormex()
G = []
sw=sp[w]
return px[sw], w, itx[sw], delete( arange(len(segm)), w)
else:return px, ilx, itx
clear()
smooth()
lights(True)
transparent(False)
view('iso')
image = None
scaled_image = None
# read the teapot surface
T = TriSurface.read(getcfg('datadir')+'/teapot.off')
xmin,xmax = T.bbox()
T= T.trl(-T.center()).scale(4./(xmax[0]-xmin[0])).setProp(2)
draw(T)
# default image file
filename = getcfg('datadir')+'/benedict_6.jpg'
viewer = ImageView(filename)
px,py = 5,5 #control points for projection of patches
kx,ky = 60,50 #number of cells in each patch
scale = 0.8
method='projection'
res = askItems([
I('filename',filename,text='Image file',itemtype='button',func=selectImage),
##
"""HorseTorse
level = 'advanced'
topics = ['geometry','surface','mesh']
techniques = ['intersection']
"""
from plugins.trisurface import TriSurface
from mesh import Mesh
reset()
smooth()
lights(True)
S = TriSurface.read(getcfg("datadir") + "/horse.off")
SA = draw(S)
res = askItems([("direction", [1.0, 0.0, 0.0]), ("number of sections", 20), ("color", "red"), ("ontop", False)])
if not res:
exit()
d = res["direction"]
n = res["number of sections"]
c = res["color"]
slices = S.slice(dir=d, nplanes=n)
linewidth(2)
draw(slices, color=c, view=None, bbox="last", nolight=True, ontop=res["ontop"])
draw(slices[0])
