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something_like_this.py
# Loft curves given by files into surface
#
# INPUT
# p0.txt, p1.txt
#
# OUTPUT
# loftsurf.ply
#
# USAGE
#
# Commandline
# blender --background --python blender_loft.py p0.txt p1.txt
# b3d --background --python blender_loft.py p0.txt p1.txt
#
# Inside blender console
#
# filename = "PWD/blender_loft.py"
# exec(compile(open(filename).read(), filename, 'exec'))
#
# AUTHOR
# Ricardo Fabbri <rfabbri@gmail.com>, 3 Dec 2015
#
import sys
import bpy
import bpy_extras
import numpy
from mathutils import Matrix
import addon_utils
addon_utils.enable('mesh_bsurfaces')
# Create a spline/bezier from a list of points
def new_curve_from_points(p0, name_prefix):
npts = len(p0)
c0 = bpy.data.curves.new(name_prefix + 'CurveToLoft', 'CURVE')
o0 = bpy.data.objects.new(name_prefix + 'CurveToLoft', c0)
bpy.context.scene.objects.link(o0)
c0.dimensions = "3D"
spline = o0.data.splines.new('BEZIER')
spline.bezier_points.add(npts - 1)
# ^-- less one because one point is added when the spline is created.
for p in range(0, npts):
spline.bezier_points[p].co = p0[p]
# spline.bezier_points[p].co = [p0[p][0], p0[p][1], p0[p][2]]
return c0, o0, spline
def read_files(p0_fname, p1_fname):
p0 = numpy.loadtxt(p0_fname)
p0.tolist()
p1 = numpy.loadtxt(p1_fname)
p1.tolist()
print(p0, p1)
return p0, p1
def test1(file1, file2):
# cleanup()
p0, p1 = read_files(file1, file2)
loft(p0, p1)
bpy.ops.export_mesh.ply(filepath='loftsurf.ply')
def loft(p0, p1):
c0, o0, s0 = new_curve_from_points(p0, 'first')
c1, o1, s1 = new_curve_from_points(p1, 'second')
# join curves into a group
bpy.data.objects[o0.name].select = True
bpy.data.objects[o1.name].select = True
bpy.context.scene.objects.active = bpy.data.objects[o1.name]
bpy.ops.object.join('INVOKE_REGION_WIN')
# create a mesh to store the final surface
me = bpy.data.meshes.new("outputLoft")
ob = bpy.data.objects.new("outputLoft", me)
scn = bpy.context.scene
scn.objects.link(ob)
scn.objects.active = ob
ob.select = True
# curves + object should be selected
# call lofting
bpy.ops.object.mode_set('INVOKE_REGION_WIN', mode='EDIT', toggle=True)
bpy.ops.mesh.reveal()
bpy.ops.gpencil.surfsk_add_surface('INVOKE_DEFAULT')
if __name__ == "__main__":
file1, file2 = sys.argv[-2:]
test1(file1, file2)
@zeffii

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commented Dec 4, 2015

p0.txt

1 0 0
0 0 0
0 1 0

p1.txt

1 1 0
0 1 0
0 0 1
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