1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
|
# ***** GPL LICENSE BLOCK *****
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# All rights reserved.
#
# ***** GPL LICENSE BLOCK *****
import bpy, math, bmesh
from mathutils import Vector, Matrix
from . import internal
class OffsetCurve(bpy.types.Operator):
bl_idname = 'curve.add_toolpath_offset_curve'
bl_description = bl_label = 'Offset Curve'
bl_options = {'REGISTER', 'UNDO'}
offset: bpy.props.FloatProperty(name='Offset', description='Distace between the original and the first trace', unit='LENGTH', default=0.1)
pitch: bpy.props.FloatProperty(name='Pitch', description='Distace between two parallel traces', unit='LENGTH', default=0.1)
step_angle: bpy.props.FloatProperty(name='Resolution', description='Smaller values make curves smoother by adding more vertices', unit='ROTATION', min=math.pi/128, default=math.pi/16)
count: bpy.props.IntProperty(name='Count', description='Number of parallel traces', min=1, default=1)
round_line_join: bpy.props.BoolProperty(name='Round Line Join', description='Insert circle arcs at convex corners', default=True)
@classmethod
def poll(cls, context):
return bpy.context.object != None and bpy.context.object.type == 'CURVE'
def execute(self, context):
if bpy.context.object.mode == 'EDIT':
splines = internal.getSelectedSplines(True, True)
else:
splines = bpy.context.object.data.splines
if len(splines) == 0:
self.report({'WARNING'}, 'Nothing selected')
return {'CANCELLED'}
if bpy.context.object.mode != 'EDIT':
internal.addObject('CURVE', 'Offset Toolpath')
origin = bpy.context.scene.cursor.location
else:
origin = Vector((0.0, 0.0, 0.0))
for spline in splines:
spline_points = spline.bezier_points if spline.type == 'BEZIER' else spline.points
for spline_point in spline_points:
if spline_point.co.z != spline_points[0].co.z:
self.report({'WARNING'}, 'Curves must be planar and in XY plane')
return {'CANCELLED'}
for index in range(0, self.count):
traces = internal.offsetPolygonOfSpline(spline, self.offset+self.pitch*index, self.step_angle, self.round_line_join)
for trace in traces:
internal.addPolygonSpline(bpy.context.object, spline.use_cyclic_u, [vertex-origin for vertex in trace])
return {'FINISHED'}
class SliceMesh(bpy.types.Operator):
bl_idname = 'curve.add_toolpath_slice_mesh'
bl_description = bl_label = 'Slice Mesh'
bl_options = {'REGISTER', 'UNDO'}
pitch_axis: bpy.props.FloatVectorProperty(name='Pitch & Axis', unit='LENGTH', description='Vector between to slices', subtype='DIRECTION', default=(0.0, 0.0, 0.1), size=3)
offset: bpy.props.FloatProperty(name='Offset', unit='LENGTH', description='Position of first slice along axis', default=-0.4)
slice_count: bpy.props.IntProperty(name='Count', description='Number of slices', min=1, default=9)
@classmethod
def poll(cls, context):
return bpy.context.object != None and bpy.context.object.mode == 'OBJECT'
def execute(self, context):
if bpy.context.object.type != 'MESH':
self.report({'WARNING'}, 'Active object must be a mesh')
return {'CANCELLED'}
depsgraph = context.evaluated_depsgraph_get()
mesh = bmesh.new()
mesh.from_object(bpy.context.object, depsgraph, deform=True, cage=False, face_normals=True)
mesh.transform(bpy.context.object.matrix_world)
toolpath = internal.addObject('CURVE', 'Slices Toolpath')
pitch_axis = Vector(self.pitch_axis)
axis = pitch_axis.normalized()
for i in range(0, self.slice_count):
aux_mesh = mesh.copy()
cut_geometry = bmesh.ops.bisect_plane(aux_mesh, geom=aux_mesh.edges[:]+aux_mesh.faces[:], dist=0, plane_co=pitch_axis*i+axis*self.offset, plane_no=axis, clear_outer=False, clear_inner=False)['geom_cut']
edge_pool = set([e for e in cut_geometry if isinstance(e, bmesh.types.BMEdge)])
while len(edge_pool) > 0:
current_edge = edge_pool.pop()
first_vertex = current_vertex = current_edge.verts[0]
vertices = [current_vertex.co]
follow_edge_loop = len(edge_pool) > 0
while follow_edge_loop:
current_vertex = current_edge.other_vert(current_vertex)
vertices.append(current_vertex.co)
if current_vertex == first_vertex:
break
follow_edge_loop = False
for edge in current_vertex.link_edges:
if edge in edge_pool:
current_edge = edge
edge_pool.remove(current_edge)
follow_edge_loop = True
break
current_vertex = current_edge.other_vert(current_vertex)
vertices.append(current_vertex.co)
internal.addPolygonSpline(toolpath, False, vertices)
aux_mesh.free()
mesh.free()
return {'FINISHED'}
class DiscretizeCurve(bpy.types.Operator):
bl_idname = 'curve.add_toolpath_discretize_curve'
bl_description = bl_label = 'Discretize Curve'
bl_options = {'REGISTER', 'UNDO'}
step_angle: bpy.props.FloatProperty(name='Resolution', description='Smaller values make curves smoother by adding more vertices', unit='ROTATION', min=math.pi/512, default=math.pi/16)
samples: bpy.props.IntProperty(name='Sample Count', description='Number of samples to test per curve segment', min=1, default=128)
@classmethod
def poll(cls, context):
return bpy.context.object != None and bpy.context.object.type == 'CURVE'
def execute(self, context):
if bpy.context.object.mode == 'EDIT':
splines = internal.getSelectedSplines(True, False)
else:
splines = bpy.context.object.data.splines
if len(splines) == 0:
self.report({'WARNING'}, 'Nothing selected')
return {'CANCELLED'}
if bpy.context.object.mode != 'EDIT':
internal.addObject('CURVE', 'Discretized Curve')
origin = bpy.context.scene.cursor.location
else:
origin = Vector((0.0, 0.0, 0.0))
for spline in splines:
if spline.type != 'BEZIER':
continue
result = internal.discretizeCurve(spline, self.step_angle, self.samples)
internal.addPolygonSpline(bpy.context.object, spline.use_cyclic_u, [vertex-origin for vertex in result])
return {'FINISHED'}
class Truncate(bpy.types.Operator):
bl_idname = 'curve.add_toolpath_truncate'
bl_description = bl_label = 'Truncate'
bl_options = {'REGISTER', 'UNDO'}
min_dist: bpy.props.FloatProperty(name='Min Distance', unit='LENGTH', description='Remove vertices which are too close together', min=0.0, default=0.001)
z_hop: bpy.props.BoolProperty(name='Z Hop', description='Add movements to the ceiling at trace ends', default=True)
@classmethod
def poll(cls, context):
return bpy.context.object != None and bpy.context.object.mode == 'OBJECT'
def execute(self, context):
if bpy.context.object.type != 'EMPTY' or bpy.context.object.empty_display_type != 'CUBE':
self.report({'WARNING'}, 'Active object must be an empty of display type cube')
return {'CANCELLED'}
selection = bpy.context.selected_objects[:]
workspace = bpy.context.object
aabb = internal.AABB(center=Vector((0.0, 0.0, 0.0)), dimensions=Vector((1.0, 1.0, 1.0))*workspace.empty_display_size)
toolpath = internal.addObject('CURVE', 'Truncated Toolpath')
for curve in selection:
if curve.type == 'CURVE':
transform = workspace.matrix_world.inverted()@curve.matrix_world
inverse_transform = Matrix.Translation(-toolpath.location)@workspace.matrix_world
curve_traces = []
for spline in curve.data.splines:
if spline.type == 'POLY':
curve_traces += internal.truncateToFitBox(transform, spline, aabb)
for trace in curve_traces:
i = len(trace[0])-1
while i > 1:
if (trace[0][i-1]-trace[0][i]).length < self.min_dist:
trace[0].pop(i-1)
trace[1].pop(i-1)
i -= 1
if self.z_hop:
begin = Vector(trace[0][0])
end = Vector(trace[0][-1])
begin.z = end.z = workspace.empty_display_size
trace[0].insert(0, begin)
trace[1].insert(0, 1.0)
trace[0].append(end)
trace[1].append(1.0)
internal.addPolygonSpline(toolpath, False, [inverse_transform@vertex for vertex in trace[0]], trace[1])
return {'FINISHED'}
class RectMacro(bpy.types.Operator):
bl_idname = 'curve.add_toolpath_rect_macro'
bl_description = bl_label = 'Rect Macro'
bl_options = {'REGISTER', 'UNDO'}
track_count: bpy.props.IntProperty(name='Number Tracks', description='How many tracks', min=1, default=10)
stride: bpy.props.FloatProperty(name='Stride', unit='LENGTH', description='Distance to previous track on the way back', min=0.0, default=0.5)
pitch: bpy.props.FloatProperty(name='Pitch', unit='LENGTH', description='Distance between two tracks', default=-1.0)
length: bpy.props.FloatProperty(name='Length', unit='LENGTH', description='Length of one track', default=10.0)
speed: bpy.props.FloatProperty(name='Speed', description='Stored in softbody goal weight', min=0.0, max=1.0, default=0.1)
def execute(self, context):
if not internal.curveObject():
internal.addObject('CURVE', 'Rect Toolpath')
origin = Vector((0.0, 0.0, 0.0))
else:
origin = bpy.context.scene.cursor.location
stride = math.copysign(self.stride, self.pitch)
length = self.length*0.5
vertices = []
weights = []
for i in range(0, self.track_count):
shift = i*self.pitch
flipped = -1 if (stride == 0 and i%2 == 1) else 1
vertices.append(origin+Vector((shift, -length*flipped, 0.0)))
weights.append(self.speed)
vertices.append(origin+Vector((shift, length*flipped, 0.0)))
weights.append(self.speed)
if stride != 0:
vertices.append(origin+Vector((shift-stride, length, 0.0)))
weights.append(self.speed)
vertices.append(origin+Vector((shift-stride, -length, 0.0)))
weights.append(1)
internal.addPolygonSpline(bpy.context.object, False, vertices, weights)
return {'FINISHED'}
class DrillMacro(bpy.types.Operator):
bl_idname = 'curve.add_toolpath_drill_macro'
bl_description = bl_label = 'Drill Macro'
bl_options = {'REGISTER', 'UNDO'}
screw_count: bpy.props.FloatProperty(name='Screw Turns', description='How many screw truns', min=1.0, default=10.0)
spiral_count: bpy.props.FloatProperty(name='Spiral Turns', description='How many spiral turns', min=0.0, default=0.0)
vertex_count: bpy.props.IntProperty(name='Number Vertices', description = 'How many vertices per screw turn', min=3, default=32)
radius: bpy.props.FloatProperty(name='Radius', unit='LENGTH', description='Radius at tool center', min=0.0, default=5.0)
pitch: bpy.props.FloatProperty(name='Pitch', unit='LENGTH', description='Distance between two screw turns', min=0.0, default=1.0)
speed: bpy.props.FloatProperty(name='Speed', description='Stored in softbody goal weight', min=0.0, max=1.0, default=0.1)
def execute(self, context):
if not internal.curveObject():
internal.addObject('CURVE', 'Drill Toolpath')
origin = Vector((0.0, 0.0, 0.0))
else:
origin = bpy.context.scene.cursor.location
count = int(self.vertex_count*self.screw_count)
height = -count/self.vertex_count*self.pitch
vertices = []
weights = []
def addRadialVertex(param, radius, height):
angle = param*math.pi*2
vertices.append(origin+Vector((math.sin(angle)*radius, math.cos(angle)*radius, height)))
weights.append(self.speed)
if self.radius > 0:
if self.spiral_count > 0.0:
sCount = math.ceil(self.spiral_count*self.vertex_count)
for j in range(1, int(self.screw_count)+1):
if j > 1:
vertices.append(origin+Vector((0.0, 0.0, sHeight)))
weights.append(self.speed)
sHeight = max(-j*self.pitch, height)
for i in range(0, sCount+1):
sParam = i/self.vertex_count
addRadialVertex(sParam, i/sCount*self.radius, sHeight)
for i in range(0, self.vertex_count+1):
addRadialVertex(sParam+(count+i)/self.vertex_count, self.radius, sHeight)
else:
for i in range(0, count):
param = i/self.vertex_count
addRadialVertex(param, self.radius, -param*self.pitch)
for i in range(0, self.vertex_count+1):
addRadialVertex((count+i)/self.vertex_count, self.radius, height)
weights += [1, 1]
else:
weights += [self.speed, 1]
vertices += [origin+Vector((0.0, 0.0, height)), origin]
internal.addPolygonSpline(bpy.context.object, False, vertices, weights)
return {'FINISHED'}
operators = [OffsetCurve, SliceMesh, DiscretizeCurve, Truncate, RectMacro, DrillMacro]
|