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# SPDX-License-Identifier: GPL-2.0-or-later
# by Yann Bertrand, january 2014.
bl_info = {
"name": "Curve Outline",
"description": "creates an Outline",
"author": "Yann Bertrand (jimflim), Vladimir Spivak (cwolf3d)",
"version": (0, 5),
"blender": (2, 69, 0),
"category": "Object",
}
import bpy
from mathutils import Vector
from mathutils.geometry import intersect_line_line
from . import util
def createOutline(curve, outline):
for spline in curve.data.splines[:]:
if spline.type == 'BEZIER':
p = spline.bezier_points
if len(p) < 2:
return
out = []
n = ((p[0].handle_right - p[0].co).normalized() - (p[0].handle_left - p[0].co).normalized()).normalized()
n = Vector((-n[1], n[0], n[2]))
o = p[0].co + outline * n
out.append(o)
for i in range(1,len(p)-1):
n = ((p[i].handle_right - p[i].co).normalized() - (p[i].handle_left - p[i].co).normalized()).normalized()
n = Vector((-n[1], n[0], n[2]))
o = intersect_line_line(out[-1], (out[-1]+p[i].co - p[i-1].co), p[i].co, p[i].co + n)[0]
out.append(o)
n = ((p[-1].handle_right - p[-1].co).normalized() - (p[-1].handle_left - p[-1].co).normalized()).normalized()
n = Vector((-n[1], n[0], n[2]))
o = p[-1].co + outline * n
out.append(o)
curve.data.splines.new(spline.type)
if spline.use_cyclic_u:
curve.data.splines[-1].use_cyclic_u = True
p_out = curve.data.splines[-1].bezier_points
p_out.add(len(out)-1)
for i in range(len(out)):
p_out[i].handle_left_type = 'FREE'
p_out[i].handle_right_type = 'FREE'
p_out[i].co = out[i]
if i<len(out)-1:
l = (p[i + 1].co - p[i].co).length
l2 = (out[i] - out[i + 1]).length
if i==0:
p_out[i].handle_left = out[i] + ((p[i].handle_left - p[i].co) * l2/l)
if i<len(out)-1:
p_out[i + 1].handle_left = out[i + 1] + ((p[i + 1].handle_left - p[i + 1].co) * l2/l)
p_out[i].handle_right = out[i] + ((p[i].handle_right - p[i].co) * l2/l)
for i in range(len(p)):
p_out[i].handle_left_type = p[i].handle_left_type
p_out[i].handle_right_type = p[i].handle_right_type
else:
if len(spline.points) < 2:
return
p = []
for point in spline.points:
v = Vector((point.co[0], point.co[1], point.co[2]))
p.append(v)
out = []
n = ((p[1] - p[0]).normalized() - (p[-1] - p[0]).normalized()).normalized()
n = Vector((-n[1], n[0], n[2]))
o = p[0] + outline * n
out.append(o)
for i in range(1,len(p)-1):
n = ((p[i+1] - p[i]).normalized() - (p[i-1] - p[i]).normalized()).normalized()
n = Vector((-n[1], n[0], n[2]))
o = intersect_line_line(out[-1], (out[-1]+p[i] - p[i-1]), p[i], p[i] + n)[0]
out.append(o)
n = ((p[0] - p[-1]).normalized() - (p[-2] - p[-1]).normalized()).normalized()
n = Vector((-n[1], n[0], n[2]))
o = p[-1] + outline * n
out.append(o)
curve.data.splines.new(spline.type)
if spline.use_cyclic_u:
curve.data.splines[-1].use_cyclic_u = True
p_out = curve.data.splines[-1].points
p_out.add(len(out)-1)
for i in range(len(out)):
p_out[i].co = (out[i][0], out[i][1], out[i][2], 0.0)
return
class CurveOutline(bpy.types.Operator):
"""Curve Outliner"""
bl_idname = "curvetools.outline"
bl_label = "Create Outline"
bl_options = {'REGISTER', 'UNDO'}
outline: bpy.props.FloatProperty(name="Amount", default=0.1)
@classmethod
def poll(cls, context):
return util.Selected1OrMoreCurves()
def execute(self, context):
createOutline(context.object, self.outline)
return {'FINISHED'}
def invoke(self, context, event):
return context.window_manager.invoke_props_popup(self, event)
def menu_func(self, context):
self.layout.operator(CurveOutline.bl_idname)
def register():
for cls in classes:
bpy.utils.register_class(operators)
def unregister():
for cls in classes:
bpy.utils.unregister_class(operators)
if __name__ == "__main__":
register()
operators = [CurveOutline]
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