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May 2, 2016 18:58
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Macro for FreeCAD to create boxes suitable for laser cutting
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# Macro for FreeCAD to create boxes suitable for laser cutting | |
from FreeCAD import Base, Vector, Matrix | |
import Part | |
class BoxCfg: | |
def __init__(self, thickness, notches): | |
self.thickness = thickness | |
self.notches = notches | |
self.piece_size = 60 | |
class VGen: | |
def __init__(self, current, dir): | |
if dir == 'right': | |
self.x_x = 1 | |
self.x_y = 0 | |
self.y_x = 0 | |
self.y_y = 1 | |
elif dir == 'left': | |
self.x_x = -1 | |
self.x_y = 0 | |
self.y_x = 0 | |
self.y_y = -1 | |
elif dir == 'down': | |
self.x_x = 0 | |
self.x_y = -1 | |
self.y_x = 1 | |
self.y_y = 0 | |
elif dir == 'up': | |
self.x_x = 0 | |
self.x_y = 1 | |
self.y_x = -1 | |
self.y_y = 0 | |
else: | |
raise Exception('Bad dir: ' + dir) | |
self.current = current | |
self.list = [] | |
def move(self, x, y, z): | |
self.current = self.current.add(Vector(x, y, z)) | |
self.list.append(self.current) | |
def moveX(self, value): | |
self.move(self.x_x * value, self.x_y * value, 0) | |
def moveY(self, value): | |
self.move(self.y_x * value, self.y_y * value, 0) | |
def line1(cfg, start, dir, inv, include_start): | |
x = 10 | |
if inv: | |
inv = -1 | |
else: | |
inv = 1 | |
g = VGen(start, dir) | |
if include_start: | |
g.moveX(cfg.thickness) | |
g.moveX(x) | |
for i in range(0, cfg.notches): | |
g.moveY(-cfg.thickness * inv) | |
g.moveX(x) | |
g.moveY(cfg.thickness * inv) | |
g.moveX(x) | |
if include_start: | |
g.moveX(cfg.thickness) | |
return g.list | |
def largePolygon(cfg): | |
v = [Vector(0, 0, 0)] | |
top = line1(cfg, v[-1], 'right', False, True); v.extend(top) | |
left = line1(cfg, v[-1], 'down', False, True); v.extend(left) | |
bottom = line1(cfg, v[-1], 'left', False, True); v.extend(bottom) | |
right = line1(cfg, v[-1], 'up', False, True); v.extend(right) | |
return v | |
def mediumPolygon(cfg): | |
v = [Vector(cfg.thickness, 0, 0)] | |
top = line1(cfg, v[-1], 'right', False, False); v.extend(top) | |
left = line1(cfg, v[-1], 'down', True, True); v.extend(left) | |
bottom = line1(cfg, v[-1], 'left', False, False); v.extend(bottom) | |
right = line1(cfg, v[-1], 'up', True, True); v.extend(right) | |
return v | |
def smallPolygon(cfg): | |
v = [Vector(cfg.thickness, 0, 0)] | |
top = line1(cfg, v[-1], 'right', True, False); v.extend(top) | |
left = line1(cfg, v[-1], 'down', True, False); v.extend(left) | |
bottom = line1(cfg, v[-1], 'left', True, False); v.extend(bottom) | |
right = line1(cfg, v[-1], 'up', True, False); v.extend(right) | |
return v | |
print("------------------------------------") | |
doc = FreeCAD.newDocument() | |
doc.saveAs("/tmp/foo.fcstd") | |
# front back left | |
# right top bottom | |
cfg = BoxCfg(3, 2) | |
m = Matrix() | |
m.move(cfg.piece_size * -0.5, 0, 0) | |
s = Part.makePolygon(largePolygon(cfg)) | |
s.transformShape(m) | |
FreeCAD.ActiveDocument.addObject("Part::Feature", "Front").Shape = s | |
m = Matrix() | |
m.move(cfg.piece_size * 0.5, 0, 0) | |
s = Part.makePolygon(largePolygon(cfg)) | |
s.transformShape(m) | |
FreeCAD.ActiveDocument.addObject("Part::Feature", "Back").Shape = s | |
m = Matrix() | |
m.move(cfg.piece_size * 1.5, 0, 0) | |
l = Part.makePolygon(mediumPolygon(cfg)) | |
l.transformShape(m) | |
FreeCAD.ActiveDocument.addObject("Part::Feature", "Left").Shape = l | |
m = Matrix() | |
m.move(cfg.piece_size * -0.5, cfg.piece_size * -1, 0) | |
l = Part.makePolygon(smallPolygon(cfg)) | |
l.transformShape(m) | |
FreeCAD.ActiveDocument.addObject("Part::Feature", "Right").Shape = l | |
m = Matrix() | |
m.move(cfg.piece_size * 0.5, cfg.piece_size * -1, 0) | |
l = Part.makePolygon(smallPolygon(cfg)) | |
l.transformShape(m) | |
FreeCAD.ActiveDocument.addObject("Part::Feature", "Top").Shape = l | |
m = Matrix() | |
m.move(cfg.piece_size * 1.5, cfg.piece_size * -1, 0) | |
l = Part.makePolygon(mediumPolygon(cfg)) | |
l.transformShape(m) | |
FreeCAD.ActiveDocument.addObject("Part::Feature", "Bottom").Shape = l | |
Gui.ActiveDocument = doc | |
Gui.SendMsgToActiveView("ViewFit") |
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