forked from tomate44/CurvesWB
/
bezierCurve.py
211 lines (185 loc) · 8.03 KB
/
bezierCurve.py
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
import os
import FreeCAD, FreeCADGui, Part
from pivy import coin
import CoinNodes
import HUD
import dummy
path_curvesWB = os.path.dirname(dummy.__file__)
path_curvesWB_icons = os.path.join( path_curvesWB, 'Resources', 'icons')
class bezierCurve:
"""Create a Bspline curve"""
def Activated(self):
self.view = FreeCADGui.ActiveDocument.ActiveView
self.viewer = self.view.getViewer()
self.oldRadius = self.viewer.getPickRadius()
self.viewer.setPickRadius(25.0)
self.obj = FreeCAD.ActiveDocument.addObject("Part::Spline","BSplineCurve")
self.stack = [FreeCAD.Vector(0,0,0)]
self.markerPos = None
self.snap = False
self.snapShape = None
self.point = FreeCAD.Vector(0,0,0)
self.curve = Part.BSplineCurve()
self.degree = 1
self.mults = [2,2]
self.knots = [0.]
self.clicCB = self.view.addEventCallbackPivy( coin.SoMouseButtonEvent.getClassTypeId(), self.clic_cb)
self.keyboardCB = self.view.addEventCallbackPivy( coin.SoKeyboardEvent.getClassTypeId(), self.kb_cb)
self.cursorCB = self.view.addEventCallbackPivy( coin.SoLocation2Event.getClassTypeId(), self.cursor_cb)
self.nodeInit()
def nodeInit(self):
self.sg = self.view.getSceneGraph()
self.coord = CoinNodes.coordinate3Node([(0,0,0)])
self.markers = CoinNodes.markerSetNode((1,0.35,0.8),70)
self.polygon = CoinNodes.sensorPolyNode((0.0,0.5,0.0),1)
self.polygon.transparency = 0.7
self.polygon.linkTo(self.coord)
self.sg.addChild(self.coord)
self.sg.addChild(self.markers)
self.info = ["LMB : add pole",
"Del : remove last pole",
"Page Up / Down : degree",
"Left CTRL : snap",
"Enter : Accept",
"Esc : Abort"]
self.Block1 = HUD.textArea()
self.Block1.setFont("Sans", 10.0, (0.,0.,0.))
self.Block1.text = self.info + ["Degree : %s"%self.curve.Degree]
self.myHud = HUD.HUD()
self.myHud.addBlock(self.Block1)
self.myHud.add()
def getGeomPoint(self):
obj = FreeCAD.getDocument(self.snapShape[0]).getObject(self.snapShape[1])
FreeCAD.Console.PrintMessage('%s\n'%str(self.snapShape[2]))
if 'Vertex' in self.snapShape[2]:
n = eval(self.snapShape[2].lstrip('Vertex'))
shape = obj.Shape.Vertexes[n-1]
elif 'Edge' in self.snapShape[2]:
n = eval(self.snapShape[2].lstrip('Edge'))
shape = obj.Shape.Edges[n-1]
elif 'Face' in self.snapShape[2]:
n = eval(self.snapShape[2].lstrip('Face'))
shape = obj.Shape.Faces[n-1]
v = Part.Vertex(self.point)
dist, pts, sols = v.distToShape(shape)
if len(pts) == 2:
self.point = pts[1]
def increaseDegree(self):
if len(self.stack) > self.degree + 1:
self.mults.pop(-2)
self.mults[0] += 1
self.mults[-1] += 1
self.knots.pop(-1)
self.degree += 1
self.updateCurve()
def decreaseDegree(self):
if (self.degree > 1):
self.mults.insert(-1,1)
self.mults[0] -= 1
self.mults[-1] -= 1
self.knots.append(self.knots[-1]+1.)
self.degree -= 1
self.updateCurve()
def addPole(self):
if self.snap:
self.getGeomPoint()
self.stack.append(self.point)
self.coord.add((self.point.x, self.point.y, self.point.z))
if len(self.stack) > self.degree + 1:
self.mults.insert(-1,1)
self.knots.append(self.knots[-1]+1.)
self.updateCurve()
if len(self.stack) == 2:
self.sg.addChild(self.polygon) # polygon can be added several times !!!!
elif len(self.stack) >= 24:
self.finish()
def removePole(self):
if (len(self.stack) > 2) and (len(self.stack) > self.degree + 1):
self.stack.pop(-1)
self.coord.pop(-1)
self.mults.pop(-2)
self.knots.pop(-1)
self.cursorUpdate()
def updateCurve(self):
self.curve = Part.BSplineCurve()
self.curve.buildFromPolesMultsKnots(self.stack,self.mults,self.knots,False,self.degree)
self.obj.Shape = self.curve.toShape()
self.Block1.text = self.info + ["Degree : %s"%self.curve.Degree]
def cursorUpdate(self):
l = len(self.coord.point.getValues())
self.coord.point.set1Value(l-1,self.point)
self.stack[-1] = self.point
if len(self.stack) >1:
self.updateCurve()
def accept(self):
if len(self.stack) > 2:
#discards the last moving pole
if self.degree == len(self.stack) - 1:
self.decreaseDegree()
self.stack.pop(-1)
if len(self.mults) > 2:
self.mults.pop(-2)
if len(self.knots) > 2:
self.knots.pop(-1)
self.updateCurve()
def finish(self):
self.myHud.remove()
self.viewer.setPickRadius(self.oldRadius)
self.sg.removeChild(self.polygon)
self.sg.removeChild(self.markers)
self.sg.removeChild(self.coord)
self.view.removeEventCallbackPivy( coin.SoLocation2Event.getClassTypeId(), self.cursorCB)
self.view.removeEventCallbackPivy( coin.SoKeyboardEvent.getClassTypeId(), self.keyboardCB)
self.view.removeEventCallbackPivy( coin.SoMouseButtonEvent.getClassTypeId(), self.clicCB)
def abort(self):
FreeCAD.ActiveDocument.removeObject(self.obj.Name)
def getSnapPoint(self,pos):
listObjects = FreeCADGui.ActiveDocument.ActiveView.getObjectsInfo((pos[0],pos[1]))
if not listObjects == None:
for dic in listObjects:
if not dic['Object'] == self.obj.Name:
self.point = FreeCAD.Vector(dic['x'], dic['y'], dic['z'])
self.snapShape = (dic['Document'], dic['Object'], dic['Component'])
return()
def kb_cb(self, event_callback):
event = event_callback.getEvent()
if (type(event) == coin.SoKeyboardEvent):
key = ""
try:
key = event.getKey()
except ValueError:
# there is no character for this value
key = ""
if key == coin.SoKeyboardEvent.LEFT_CONTROL:
if event.getState() == coin.SoButtonEvent.DOWN:
self.snap = True
elif event.getState() == coin.SoButtonEvent.UP:
self.snap = False
elif key == coin.SoKeyboardEvent.RETURN:
self.accept()
self.finish()
elif key == coin.SoKeyboardEvent.BACKSPACE and event.getState() == coin.SoButtonEvent.UP:
self.removePole()
elif key == coin.SoKeyboardEvent.PAGE_UP and event.getState() == coin.SoButtonEvent.UP:
self.increaseDegree()
elif key == coin.SoKeyboardEvent.PAGE_DOWN and event.getState() == coin.SoButtonEvent.UP:
self.decreaseDegree()
elif key == coin.SoKeyboardEvent.ESCAPE:
self.abort()
self.finish()
def clic_cb(self, event_callback):
event = event_callback.getEvent()
if (type(event) == coin.SoMouseButtonEvent and
event.getState() == coin.SoMouseButtonEvent.DOWN
and event.getButton() == coin.SoMouseButtonEvent.BUTTON1):
self.addPole()
#FreeCADGui.Selection.clearSelection()
def cursor_cb(self, event_callback):
pos = FreeCADGui.ActiveDocument.ActiveView.getCursorPos()
self.point = self.view.getPoint(pos[0],pos[1])
if self.snap:
self.getSnapPoint(pos)
self.cursorUpdate()
def GetResources(self):
return {'Pixmap' : path_curvesWB_icons+'/bezier.svg', 'MenuText': 'BSpline Curve', 'ToolTip': 'Creates a BSpline curve'}
FreeCADGui.addCommand('bezierCurve', bezierCurve())