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__init__.py
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__init__.py
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bl_info = {
"name": "CNC Emulator for Blender 2.8",
"author": "Ulrik Holmen",
"version": (1, 0),
"blender": (2, 80, 0),
"location": "",
"description": "Emulate basic CNC functionality inside Blender. Load G-code and let an object carry out the instructions. Built on PyCNC",
"warning": "",
"wiki_url": "",
"category": "Scene"
}
# This script defines functions to be used directly in drivers expressions to
# extend the builtin set of python functions.
# This can be executed on manually or set to 'Register' to
# initialize thefunctions on file load.
import os
import bpy
import sys
import math
import numpy
from mathutils import Vector
from bpy.utils.toolsystem import ToolDef
from bpy.props import IntProperty, FloatProperty, FloatVectorProperty, StringProperty, BoolProperty
from bpy.types import WorkSpaceTool
from bpy_extras.io_utils import ImportHelper
# Load local modules
print("Path: {}".format(os.path.realpath(__file__)))
sys.path.append(os.path.abspath(os.path.dirname(os.path.realpath(__file__))))
for dir in sys.path:
print("{}".format(dir))
import gcode
# Virtual CNC
class VirtualCNC():
location = Vector([0,0,0])
lines = 0
debug = False
MoveObject = False
currentline = 0
program = None
offset = Vector([0,0,0])
state = None
curve = None
resolution = 5
message = "Initialized"
statement = "No codes yet"
polyline = None
finished = False
def __init__(self):
self.filename = None
def load_program(self):
self.MoveObject = bpy.context.scene.MoveObject
self.debug = bpy.context.scene.CNCDebug
if self.filename:
self.program = gcode.parse_program(self.filename)
self.run_program()
else:
self.message = "No filename"
self.CNCObject = bpy.context.scene.objects[bpy.context.scene.CNCObject]
if self.CNCObject:
self.statement = "Using {} as object".format(self.CNCObject)
def run_program(self):
if self.program:
self.state = self.program.start()
self.state.scale = bpy.context.scene.CNCScale
self.currentline = 0
self.state.lineno = 0
self.finished = False
self.message = "Loaded {} statements".format(len(self.program.statements))
def create_polyline(self):
if not self.polyline:
curve = bpy.data.curves.new('MyCurve', type='CURVE')
curve.dimensions = '3D'
curve.resolution_u = 2
polyline = curve.splines.new('POLY')
self.polyline = polyline
CNCCurve = bpy.data.objects.new('CNCCurve', curve)
scn = bpy.context.scene
self.curve = CNCCurve
bpy.context.scene.collection.objects.link(CNCCurve)
def delete_polyline(self):
if self.polyline:
bpy.ops.object.select_all(action='DESELECT')
if 'CNCCurve' in bpy.data.objects:
bpy.data.objects['CNCCurve'].select_set(True)
bpy.ops.object.delete()
self.polyline = None
def draw_all(self):
scn = bpy.context.scene
if self.finished:
return
while self.currentline != self.lines:
self.layout_path()
dg = bpy.context.evaluated_depsgraph_get()
dg.update()
def get_intermediates(self, path):
if (isinstance(path, gcode.Line)):
nb_points = numpy.floor(path.length * (self.resolution * self.state.scale) / path.feedRate)
x_spacing = (path.end.x - path.start.x) / (nb_points + 1)
y_spacing = (path.end.y - path.start.y) / (nb_points + 1)
z_spacing = (path.end.z - path.start.z) / (nb_points + 1)
return [Vector([path.start.x + i * x_spacing,
path.start.y + i * y_spacing,
path.start.z + i * z_spacing])
for i in range(1, int(nb_points + 1))]
elif (isinstance(path, gcode.Arc)):
angle1 = path.angle1
angle2 = path.angle2
# Calculate nr of points needed along the arc
nb_points = numpy.floor(path.length * (self.resolution * self.state.scale) / path.feedRate)
# Make sure there is at least 2 points in the arc
if nb_points == 0:
nb_points = 2
arc = abs((angle2 - angle1)) / nb_points
if arc == float(0): return []
points = []
(px, py, pz) = path.center
for p in range(1, int(nb_points)):
if path.plane == "XY" and path.clockwise:
px = path.center.x + (path.radius * math.cos(angle1 + (arc * p)))
py = path.center.y + (path.radius * math.sin(angle1 + (arc * p)))
elif path.plane == "XY":
px = path.center.x + (path.radius * math.sin(angle1 + (arc * p)))
py = path.center.y + (path.radius * math.cos(angle1 + (arc * p)))
elif path.plane == "ZX" and path.clockwise:
pz = path.center.z + (path.radius * math.sin(angle1 + (arc * p)))
px = path.center.x + (path.radius * math.cos(angle1 + (arc * p)))
elif path.plane == "ZX":
pz = path.center.z + (path.radius * math.cos(angle1 + (arc * p)))
px = path.center.x + (path.radius * math.sin(angle1 + (arc * p)))
elif path.plane == "YZ" and path.clockwise:
py = path.center.y + (path.radius * math.sin(angle1 + (arc * p)))
pz = path.center.z + (path.radius * math.cos(angle1 + (arc * p)))
elif path.plane == "YZ":
py = path.center.y + (path.radius * math.cos(angle1 + (arc * p)))
pz = path.center.z + (path.radius * math.sin(angle1 + (arc * p)))
else:
print("Unknown plane {}".format(self.plane))
points.append(Vector([px,py,pz]))
return points
def move_object(self, location):
adapted_location = self.location.to_3d() + self.offset.to_3d()
self.CNCObject.location = adapted_location
def draw_line(self, location):
if not self.polyline:
self.create_polyline()
adapted_location = self.location.to_3d() + self.offset.to_3d()
self.polyline.points.add(1)
self.polyline.points[-1].co = adapted_location.to_4d()
def layout_path(self):
# Progress the parsing and get next statement
self.state.step()
# If this was the last statement just return
if self.state.finished:
self.finished
self.message = "Completed, you have to reset"
return
# Show statement before executing
try:
if self.debug: print("{}".format(self.program.statements[self.currentline]))
self.statement = "{} {}".format(self.program.statements[self.currentline].code, " ".join(self.program.statements[self.currentline].args))
except:
self.message = "{}".format(self.program.statements[self.currentline].command)
# If this contains a path, progress
try:
path = self.state.paths[self.currentline]
self.message = "Drawing path {}".format(self.currentline)
if self.debug: print(path)
except:
self.currentline += 1
return
if self.finished:
self.message = "Completed, you have to reset"
return
#
if (isinstance(path, gcode.Line)):
if self.MoveObject:
self.move_object(path.start)
else:
self.draw_line(path.start)
self.location = path.start
for nextpoint in self.get_intermediates(path):
if nextpoint == path.start or nextpoint == path.end:
next
if self.debug: print("Line to {},{},{}".format(nextpoint.x,nextpoint.y,nextpoint.z))
if self.MoveObject:
self.move_object(nextpoint)
else:
self.draw_line(nextpoint)
self.location = nextpoint
if self.MoveObject:
self.move_object(path.end)
else:
self.draw_line(path.end)
self.location = path.end
elif (isinstance(path, gcode.Arc)):
self.location = path.start
for nextpoint in self.get_intermediates(path):
if nextpoint == path.start or nextpoint == path.end:
next
if self.debug: print("Arc line to {},{},{}".format(nextpoint.x,nextpoint.y,nextpoint.z))
if self.MoveObject:
self.move_object(nextpoint)
else:
self.draw_line(nextpoint)
self.location = nextpoint
if self.location != path.start:
if self.MoveObject:
self.move_object(nextpoint)
else:
self.draw_line(nextpoint)
self.location = path.end
else:
print("This class of path is not implemented")
self.currentline += 1
if self.currentline == self.lines:
self.finished = True
def reset(self):
self.offset = Vector([self.CNCObject.location.x, self.CNCObject.location.y, self.CNCObject.location.z])
self.delete_polyline()
self.currentline = 0
self.state.lineno = 0
self.finished = False
self.statement = "Offset: {}, {}, {}".format(self.offset.x, self.offset.y, self.offset.y)
# CNC Operator
class CNCOperator_OT_Modal(bpy.types.Operator):
"""Operator which runs its self from a timer"""
bl_idname = "cnctool.mod"
bl_label = "CNC Operator Up Modal"
_timer = None
end = None
dir_enum = [ 'up', 'down', 'fwd', 'bwd', 'left', 'right', 'stop' ]
dir: bpy.props.StringProperty(default='stop')
def modal(self, context, event):
if event.type in {'RIGHTMOUSE', 'ESC'}:
self.cancel(context)
return {'CANCELLED'}
if event.type == 'TIMER':
# change theme color, silly!
ao = bpy.context.scene.objects[context.scene.CNCObject]
vcnc = bpy.types.Scene.VirtualCNC
speed = context.scene.CNCSpeed
if self.dir == 'up':
if ao.location.z < self.end:
ao.location.z += speed
self.report({'INFO'}, "Dir %s, Current Z: %s" % (self.dir, ao.location.z))
else:
ao.location.z = self.end
vcnc.location.z = ao.location.z
self.cancel(context)
return {'CANCELLED'}
elif self.dir == 'down':
if ao.location.z > self.end:
ao.location.z -= speed
self.report({'INFO'}, "Dir %s, Current Z: %s" % (self.dir, ao.location.z))
else:
ao.location.z = self.end
vcnc.location.z = ao.location.z
self.cancel(context)
return {'CANCELLED'}
elif self.dir == 'left':
if ao.location.y < self.end:
ao.location.y += speed
self.report({'INFO'}, "Dir %s, Current Y: %s" % (self.dir, ao.location.y))
else:
ao.location.y = self.end
vcnc.location.y = ao.location.y
self.cancel(context)
return {'CANCELLED'}
elif self.dir == 'right':
if ao.location.y > self.end:
ao.location.y -= speed
self.report({'INFO'}, "Dir %s, Current Y: %s" % (self.dir, ao.location.y))
else:
ao.location.y = self.end
vcnc.location.y = ao.location.y
self.cancel(context)
return {'CANCELLED'}
elif self.dir == 'fwd':
if ao.location.x < self.end:
ao.location.x += speed
self.report({'INFO'}, "Dir %s, Current X: %s" % (self.dir, ao.location.x))
else:
ao.location.x = self.end
vcnc.location.x = ao.location.x
self.cancel(context)
return {'CANCELLED'}
elif self.dir == 'bwd':
if ao.location.x > self.end:
ao.location.x -= speed
self.report({'INFO'}, "Dir %s, Current X: %s" % (self.dir, ao.location.x))
else:
ao.location.x = self.end
vcnc.location.x = ao.location.x
self.cancel(context)
return {'CANCELLED'}
elif self.dir == 'play':
vcnc.layout_path()
self.report({'INFO'}, "Line %s, statement: %s" % (vcnc.currentline, vcnc.statement))
else:
self.cancel(context)
return {'CANCELLED'}
return {'PASS_THROUGH'}
def execute(self, context):
ao = bpy.context.scene.objects[context.scene.CNCObject]
vcnc = bpy.types.Scene.VirtualCNC
if self.dir != "stop":
if self.dir == 'up':
self.end = ao.location.z + bpy.context.scene.ZStep
self.report({'INFO'}, "Dir: %s, Goal Z: %s" % (self.dir, self.end) )
elif self.dir == 'down':
self.end = ao.location.z - bpy.context.scene.ZStep
self.report({'INFO'}, "Dir: %s, Goal Z: %s" % (self.dir, self.end) )
elif self.dir == 'left':
self.end = ao.location.y + bpy.context.scene.XYStep
self.report({'INFO'}, "Dir: %s, Goal Y: %s" % (self.dir, self.end) )
elif self.dir == 'right':
self.end = ao.location.y - bpy.context.scene.XYStep
self.report({'INFO'}, "Dir: %s, Goal Y: %s" % (self.dir, self.end) )
elif self.dir == 'fwd':
self.end = ao.location.x + bpy.context.scene.XYStep
self.report({'INFO'}, "Dir: %s, Goal X: %s" % (self.dir, self.end) )
elif self.dir == 'bwd':
self.end = ao.location.x - bpy.context.scene.XYStep
self.report({'INFO'}, "Dir: %s, Goal X: %s" % (self.dir, self.end) )
elif self.dir == 'next':
vcnc.layout_path()
return {'CANCELLED'}
elif self.dir == 'reset':
vcnc.reset()
return {'CANCELLED'}
elif self.dir == 'play':
self.report({'INFO'}, "Line %s, statement: %s" % (vcnc.currentline, vcnc.statement))
elif self.dir == 'stop':
self.report({'INFO'}, "Stopping")
self.cancel(context)
return {'CANCELLED'}
else:
return {'CANCELLED'}
else:
self.cancel(context)
return {'CANCELLED'}
wm = context.window_manager
self._timer = wm.event_timer_add(0.1, window=context.window)
wm.modal_handler_add(self)
return {'RUNNING_MODAL'}
def cancel(self, context):
self.dir = 'stop'
self.report({'INFO'}, "Dir: %s" % self.dir)
wm = context.window_manager
if self._timer:
wm.event_timer_remove(self._timer)
return {'CANCELLED'}
# File browser
class OT_TestOpenFilebrowser(bpy.types.Operator, ImportHelper):
bl_idname = "cnctool.open_filebrowser"
bl_label = "Open the file browser (yay)"
filter_glob: StringProperty( default='*.nc;*.gcode;*.ngc', options={'HIDDEN'} )
def execute(self, context):
"""Do something with the selected file(s)."""
filename, extension = os.path.splitext(self.filepath)
print('Selected file:', self.filepath)
print('File name:', filename)
print('File extension:', extension)
cnc = bpy.types.Scene.VirtualCNC
cnc.filename=self.filepath
cnc.load_program()
return {'FINISHED'}
# CNC Add Panel
class CNCEMU_PT_Panel(bpy.types.Panel):
bl_label = "CNC Emulator"# title
bl_space_type = "VIEW_3D"
bl_region_type = "UI"
bl_category = "CNC Emulator"#name of the tab
@classmethod
def poll(cls, context):
return (context.object is not None)
def draw(self, context):
layout = self.layout
layout.use_property_split = True
flow = layout.grid_flow(row_major=True, columns=2, even_columns=True, even_rows=False, align=False)
layout = flow.column()
obj = bpy.context.object
#default label and operator
row = layout.row()
row.label(text="CNC Emulator", icon='PREFERENCES')
box = layout.box()#put something in a box
row = box.row()
row.prop(obj, "expanded",
icon="TRIA_DOWN" if obj.expanded else "TRIA_RIGHT",
icon_only=True, emboss=False
)
row.label(text="Manual CNC operation")
if obj.expanded:
box.operator("cnctool.mod", icon="TRIA_UP", text='').dir = 'fwd'
row = box.row()
split = box.split(factor=0.5)
split.operator("cnctool.mod", icon="TRIA_LEFT", text='').dir = 'left'
split.operator("cnctool.mod", icon="TRIA_RIGHT", text="").dir = 'right'
row = box.row()
box.operator("cnctool.mod", icon="TRIA_DOWN", text='').dir = 'bwd'
row = box.row()
box.operator("cnctool.mod", text="Up").dir = 'up'
box.operator("cnctool.mod", text="Down").dir = 'down'
box = layout.box()#put something in a box
row = box.row()
box.operator("cnctool.mod", text="Next").dir = 'next'
box.operator("cnctool.mod", text="Reset").dir = 'reset'
row = box.row()
box.operator("cnctool.mod", icon="PLAY", text="").dir = 'play'
row = box.row()
box.operator("cnctool.mod", icon="PAUSE", text="").dir = 'stop'
row = box.row()
layout.separator() #Get some space
scene = context.scene
box.prop_search(scene, "CNCObject", scene, "objects")
layout.separator() #Get some space
row = box.row()
row.prop(scene, "XYStep")
row = box.row()
row.prop(scene, "ZStep")
row = box.row()
row.prop(scene, "CNCSpeed")
row = box.row()
layout.separator() #Get some space
row.label(text="Object: %s" % scene.CNCObject)
row = box.row()
vcnc = bpy.types.Scene.VirtualCNC
row.label(text="X Location: %s" % vcnc.location.x)
row = box.row()
row.label(text="Y Location: %s" % vcnc.location.y)
row = box.row()
row.label(text="Z Location: %s" % vcnc.location.z)
row = box.row()
layout.separator() #Get some space
row.prop(scene, "MoveObject")
row = box.row()
box.operator("cnctool.open_filebrowser", icon="FILE", text="Load file")
row = box.row()
row.label(text="Loaded: %s paths" % vcnc.lines)
row = box.row()
row.prop(scene, "CNCDebug")
row = box.row()
row.prop(scene, "CNCScale")
row = box.row()
box.label(text="%s" % vcnc.message)
row = box.row()
box.label(text="%s" % vcnc.statement)
row = box.row()
classlist = [ CNCEMU_PT_Panel,
CNCOperator_OT_Modal,
OT_TestOpenFilebrowser
]
def register():
for cls in classlist:
bpy.utils.register_class(cls)
bpy.types.Scene.VirtualCNC = VirtualCNC()
bpy.types.Object.expanded = bpy.props.BoolProperty(name="expanded", default=False)
bpy.types.Scene.CNCObject = bpy.props.StringProperty()
bpy.types.Scene.MoveObject = bpy.props.BoolProperty(name="Move object", default=False)
bpy.types.Scene.XYStep = bpy.props.FloatProperty(name = "XY Step", default=0.1, min=0.0001, max=10)
bpy.types.Scene.ZStep = bpy.props.FloatProperty(name = "Z Step", default=0.1, min=0.0001, max=10)
bpy.types.Scene.CNCSpeed = bpy.props.FloatProperty(name = "CNC Speed", default=0.1, min=0.0001, max=10)
bpy.types.Scene.CNCScale = bpy.props.FloatProperty(name = "CNC Scale", default=1000, min=1, max=1000)
bpy.types.Scene.CNCDebug = bpy.props.BoolProperty(name = "debug", default=False)
def unregister():
for cls in classlist:
bpy.utils.unregister_class(cls)
if __name__ == "__main__":
register()