This is a very simple issue but I am making it needlessly complex and continue to hit road blocks.
I am trying to parse a simple text file which contains point cloud information, x, y, z.
It looks like this:
vertices:
v -543.243 -494.262 1282
v -538.79 -494.262 1282
v -536.422 -496.19 1287
v -531.951 -496.19 1287
v -527.481 -496.19 1287
v -213.909 -223.999 581
v -212.255 -224.384 582
v -209.15 -223.228 579
v -207.855 -223.999 581
v -205.482 -223.613 580
v -203.468 -223.613 580
v -201.106 -223.228 579
v -199.439 -223.613 580
v -197.765 -223.999 581
v -195.41 -223.613 580
v -193.062 -223.228 579
v -190.721 -222.842 578
v -189.04 -223.228 579
v -187.998 -224.384 582
v -185.976 -224.384 582
v -183.955 -224.384 582
v -181.621 -223.999 581
v -179.293 -223.613 580
v -177.279 -223.613 580
v -175.264 -223.613 580
v -173.549 -223.999 581
v -171.531 -223.999 581
v -169.513 -223.999 581
v -167.495 -223.999 581
v -165.761 -224.384 582
v -163.74 -224.384 582
v -161.718 -224.384 582
v -159.697 -224.384 582
v -157.946 -224.77 583
v -155.921 -224.77 583
v -153.896 -224.77 583
v -151.871 -224.77 583
v -149.847 -224.77 583
v -147.568 -224.384 582
Right okay. Not so bad.
Next I am using python in blender to convert these points into vertices:
It looks like so: `
#Open the file
try:
f=open(path, 'r')
except:
print ("Path is not Valid")
#Create an array of
verts = []
#verts=[float(e) for e in verts if e]
#values = []
for line in f:
lines = f.readline()
#values = ([c for c in lines if c in '-1234567890.'])
if line.startswith("v "): #Go through file line by line
read = lines.strip(' v\n').split(',') #remove the v,split@,
#read = values.split(',')
#loop over all stuff in read, remove non-numerics
for d in read:
d= d.strip('-').split(' ')
print("d:", (d))
for n in d:
n = n.strip('-')
verts = verts.append(float(n[0]))
#verts = verts.append(float(n[2]))
#verts = verts.append(float(n[3]))
print("vertsloops", d[0])
print("read1", read[0])
print(read)
print("oo1verts", verts)
##################
#Extend the array#
#print ("Could not use the line reading: %s"%read)
# Create a new mesh, it is now empty
mesh = bpy.data.meshes.new("Cube")
# Create empty vertices field in the mesh
mesh.vertices.add(len(verts))
# Add vertices
mesh.vertices.foreach_set("co", verts)
#Add a new empty object named "Read the PointCloud Data"
obj = bpy.data.objects.new("Read the PointCloud Data", mesh)
# Link object to current scene
bpy.context.scene.objects.link(obj)
`
Somehow, I have tried many different combinations of splitting the string, but still getting errors. I know this is a simple task!?! Any Advice please!
The errors I get look at first like:
d: ['-536.422', '-496.19', '1287']
Traceback (most recent call last):
File "/Users/.../importpoints.blend/importpoints", line 37, in <module>
ValueError: could not convert string to float: '-'
Error: Python script fail, look in the console for now...
And Then like so :
d: ['536.422', '-496.19', '1287']
vertsloops 536.422
Traceback (most recent call last):
File "/Users/.../importpoints.blend/importpoints", line 37, in <module>
AttributeError: 'NoneType' object has no attribute 'append'
Error: Python script fail, look in the console for now...
One thing is, how come float('-531') won't be handled as a negative number. As it stands, it hits the '-' sting and considers it non-numeric so it cannot convert it. But its negative, so how can I indicate that???
Thanks.
Make your reading a bit shorter:
verts = []
for line in f:
if line.startswith('v '):
verts.append([float(val) for val in line.split()[1:]])
This should replace your full for line in f: loop.
Make sure there is no other line later starting with v in your file. Maybe there is an empty line after the values, so you can stop reading there.
Now verts looks like this:
[[-543.243, -494.262, 1282.0],
[-538.79, -494.262, 1282.0],
[-536.422, -496.19, 1287.0],
[-531.951, -496.19, 1287.0],
[-527.481, -496.19, 1287.0],
[-213.909, -223.999, 581.0],
[-212.255, -224.384, 582.0],
[-209.15, -223.228, 579.0],
[-207.855, -223.999, 581.0],
[-205.482, -223.613, 580.0],
[-203.468, -223.613, 580.0],
[-201.106, -223.228, 579.0],
[-199.439, -223.613, 580.0],
[-197.765, -223.999, 581.0],
[-195.41, -223.613, 580.0],
[-193.062, -223.228, 579.0],
[-190.721, -222.842, 578.0],
[-189.04, -223.228, 579.0],
[-187.998, -224.384, 582.0],
[-185.976, -224.384, 582.0],
[-183.955, -224.384, 582.0],
[-181.621, -223.999, 581.0],
[-179.293, -223.613, 580.0],
[-177.279, -223.613, 580.0],
[-175.264, -223.613, 580.0],
[-173.549, -223.999, 581.0],
[-171.531, -223.999, 581.0],
[-169.513, -223.999, 581.0],
[-167.495, -223.999, 581.0],
[-165.761, -224.384, 582.0],
[-163.74, -224.384, 582.0],
[-161.718, -224.384, 582.0],
[-159.697, -224.384, 582.0],
[-157.946, -224.77, 583.0],
[-155.921, -224.77, 583.0],
[-153.896, -224.77, 583.0],
[-151.871, -224.77, 583.0],
[-149.847, -224.77, 583.0],
[-147.568, -224.384, 582.0]]