import bpy, os
import numpy as np
import mathutils
from mathutils import Vector
from math import pi
from bpy.types import (
Operator,
Panel,
PropertyGroup,
)
from bpy.props import (
BoolProperty,
EnumProperty,
FloatProperty,
IntProperty,
StringProperty,
PointerProperty
)
from .utils import *
def change_speed_mode(self, context):
props = context.scene.tissue_gcode
if props.previous_speed_mode != props.speed_mode:
if props.speed_mode == 'SPEED':
props.speed = props.feed/60
props.speed_vertical = props.feed_vertical/60
props.speed_horizontal = props.feed_horizontal/60
else:
props.feed = props.speed*60
props.feed_vertical = props.speed_vertical*60
props.feed_horizontal = props.speed_horizontal*60
props.previous_speed_mode == props.speed_mode
return
class tissue_gcode_prop(PropertyGroup):
last_e : FloatProperty(name="Pull", default=5.0, min=0, soft_max=10)
path_length : FloatProperty(name="Pull", default=5.0, min=0, soft_max=10)
folder : StringProperty(
name="File", default="", subtype='FILE_PATH',
description = 'Destination folder.\nIf missing, the file folder will be used'
)
pull : FloatProperty(
name="Pull", default=5.0, min=0, soft_max=10,
description='Pull material before lift'
)
push : FloatProperty(
name="Push", default=5.0, min=0, soft_max=10,
description='Push material before start extruding'
)
dz : FloatProperty(
name="dz", default=2.0, min=0, soft_max=20,
description='Z movement for lifting the nozzle before travel'
)
flow_mult : FloatProperty(
name="Flow Mult", default=1.0, min=0, soft_max=3,
description = 'Flow multiplier.\nUse a single value or a list of values for changing it during the printing path'
)
feed : IntProperty(
name="Feed Rate (F)", default=3600, min=0, soft_max=20000,
description='Printing speed'
)
feed_horizontal : IntProperty(
name="Feed Horizontal", default=7200, min=0, soft_max=20000,
description='Travel speed'
)
feed_vertical : IntProperty(
name="Feed Vertical", default=3600, min=0, soft_max=20000,
description='Lift movements speed'
)
speed : IntProperty(
name="Speed", default=60, min=0, soft_max=100,
description='Printing speed'
)
speed_horizontal : IntProperty(
name="Travel", default=120, min=0, soft_max=200,
description='Travel speed'
)
speed_vertical : IntProperty(
name="Z-Lift", default=60, min=0, soft_max=200,
description='Lift movements speed'
)
esteps : FloatProperty(
name="E Steps/Unit", default=5, min=0, soft_max=100)
start_code : StringProperty(
name="Start", default='', description = 'Text block for starting code'
)
end_code : StringProperty(
name="End", default='', description = 'Text block for ending code'
)
auto_sort_layers : BoolProperty(
name="Auto Sort Layers", default=True,
description = 'Sort layers according to the Z of the median point'
)
auto_sort_points : BoolProperty(
name="Auto Sort Points", default=False,
description = 'Shift layer points trying to automatically reduce needed travel movements'
)
close_all : BoolProperty(
name="Close Shapes", default=False,
description = 'Repeat the starting point at the end of the vertices list for each layer'
)
nozzle : FloatProperty(
name="Nozzle", default=0.4, min=0, soft_max=10,
description='Nozzle diameter'
)
layer_height : FloatProperty(
name="Layer Height", default=0.1, min=0, soft_max=10,
description = 'Average layer height, needed for a correct extrusion'
)
filament : FloatProperty(
name="Filament (\u03A6)", default=1.75, min=0, soft_max=120,
description='Filament (or material container) diameter'
)
gcode_mode : EnumProperty(items=[
("CONT", "Continuous", ""),
("RETR", "Retraction", "")
], default='CONT', name="Mode",
description = 'If retraction is used, then each separated list of vertices\nwill be considered as a different layer'
)
speed_mode : EnumProperty(items=[
("SPEED", "Speed (mm/s)", ""),
("FEED", "Feed (mm/min)", "")
], default='SPEED', name="Speed Mode",
description = 'Speed control mode',
update = change_speed_mode
)
previous_speed_mode : StringProperty(
name="previous_speed_mode", default='', description = ''
)
retraction_mode : EnumProperty(items=[
("FIRMWARE", "Firmware", ""),
("GCODE", "Gcode", "")
], default='GCODE', name="Retraction Mode",
description = 'If firmware retraction is used, then the retraction parameters will be controlled by the printer'
)
animate : BoolProperty(
name="Animate", default=False,
description = 'Show print progression according to current frame'
)
class TISSUE_PT_gcode_exporter(Panel):
bl_category = "Tissue Gcode"
bl_space_type = "VIEW_3D"
bl_region_type = "UI"
#bl_space_type = 'PROPERTIES'
#bl_region_type = 'WINDOW'
#bl_context = "data"
bl_label = "Tissue Gcode Export"
#bl_options = {'DEFAULT_CLOSED'}
@classmethod
def poll(cls, context):
try: return context.object.type in ('CURVE','MESH')
except: return False
def draw(self, context):
props = context.scene.tissue_gcode
#addon = context.user_preferences.addons.get(sverchok.__name__)
#over_sized_buttons = addon.preferences.over_sized_buttons
layout = self.layout
col = layout.column(align=True)
row = col.row()
row.prop(props, 'folder', toggle=True, text='')
col = layout.column(align=True)
row = col.row()
row.prop(props, 'gcode_mode', expand=True, toggle=True)
#col = layout.column(align=True)
col = layout.column(align=True)
col.label(text="Extrusion:", icon='MOD_FLUIDSIM')
#col.prop(self, 'esteps')
col.prop(props, 'filament')
col.prop(props, 'nozzle')
col.prop(props, 'layer_height')
col.separator()
col.label(text="Speed (Feed Rate F):", icon='DRIVER')
col.prop(props, 'speed_mode', text='')
speed_prefix = 'feed' if props.speed_mode == 'FEED' else 'speed'
col.prop(props, speed_prefix, text='Print')
if props.gcode_mode == 'RETR':
col.prop(props, speed_prefix + '_vertical', text='Z Lift')
col.prop(props, speed_prefix + '_horizontal', text='Travel')
col.separator()
if props.gcode_mode == 'RETR':
col = layout.column(align=True)
col.label(text="Retraction Mode:", icon='NOCURVE')
row = col.row()
row.prop(props, 'retraction_mode', expand=True, toggle=True)
if props.retraction_mode == 'GCODE':
col.separator()
col.label(text="Retraction:", icon='PREFERENCES')
col.prop(props, 'pull', text='Retraction')
col.prop(props, 'dz', text='Z Hop')
col.prop(props, 'push', text='Preload')
col.separator()
#col.label(text="Layers options:", icon='ALIGN_JUSTIFY')
col.separator()
col.prop(props, 'auto_sort_layers', text="Sort Layers (Z)")
col.prop(props, 'auto_sort_points', text="Sort Points (XY)")
#col.prop(props, 'close_all')
col.separator()
col.label(text='Custom Code:', icon='TEXT')
col.prop_search(props, 'start_code', bpy.data, 'texts')
col.prop_search(props, 'end_code', bpy.data, 'texts')
col.separator()
row = col.row(align=True)
row.scale_y = 2.0
row.operator('scene.tissue_gcode_export')
#col.separator()
#col.prop(props, 'animate', icon='TIME')
class tissue_gcode_export(Operator):
bl_idname = "scene.tissue_gcode_export"
bl_label = "Export Gcode"
bl_description = ("Export selected curve object as Gcode file")
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(cls, context):
try:
return context.object.type in ('CURVE', 'MESH')
except:
return False
def execute(self, context):
scene = context.scene
props = scene.tissue_gcode
# manage data
if props.speed_mode == 'SPEED':
props.feed = props.speed*60
props.feed_vertical = props.speed_vertical*60
props.feed_horizontal = props.speed_horizontal*60
feed = props.feed
feed_v = props.feed_vertical
feed_h = props.feed_horizontal
layer = props.layer_height
flow_mult = props.flow_mult
#if context.object.type != 'CURVE':
# self.report({'ERROR'}, 'Please select a Curve object')
# return {'CANCELLED'}
ob = context.object
matr = ob.matrix_world
if ob.type == 'MESH':
dg = context.evaluated_depsgraph_get()
mesh = ob.evaluated_get(dg).data
edges = [list(e.vertices) for e in mesh.edges]
verts = [v.co for v in mesh.vertices]
ordered_verts = find_curves(edges, len(mesh.vertices))
ob = curve_from_pydata(verts, ordered_verts, name='__temp_curve__', merge_distance=0.1, set_active=False)
vertices = [[matr @ p.co.xyz for p in s.points] for s in ob.data.splines]
cyclic_u = [s.use_cyclic_u for s in ob.data.splines]
if ob.name == '__temp_curve__': bpy.data.objects.remove(ob)
if len(vertices) == 1: props.gcode_mode = 'CONT'
export = True
# open file
if(export):
if props.folder == '':
folder = '//' + os.path.splitext(bpy.path.basename(bpy.context.blend_data.filepath))[0]
else:
folder = props.folder
if '.gcode' not in folder: folder += '.gcode'
path = bpy.path.abspath(folder)
file = open(path, 'w')
try:
for line in bpy.data.texts[props.start_code].lines:
file.write(line.body + '\n')
except:
pass
#if props.gcode_mode == 'RETR':
# sort layers (Z)
if props.auto_sort_layers:
sorted_verts = []
for curve in vertices:
# mean z
listz = [v[2] for v in curve]
meanz = np.mean(listz)
# store curve and meanz
sorted_verts.append((curve, meanz))
vertices = [data[0] for data in sorted(sorted_verts, key=lambda height: height[1])]
# sort vertices (XY)
if props.auto_sort_points:
# curves median point
median_points = [np.mean(verts,axis=0) for verts in vertices]
# chose starting point for each curve
for j, curve in enumerate(vertices):
# for closed curves finds the best starting point
if cyclic_u[j]:
# create kd tree
kd = mathutils.kdtree.KDTree(len(curve))
for i, v in enumerate(curve):
kd.insert(v, i)
kd.balance()
if props.gcode_mode == 'RETR':
if j==0:
# close to next two curves median point
co_find = np.mean(median_points[j+1:j+3],axis=0)
elif j < len(vertices)-1:
co_find = np.mean([median_points[j-1],median_points[j+1]],axis=0)
else:
co_find = np.mean(median_points[j-2:j],axis=0)
#flow_mult[j] = flow_mult[j][index:]+flow_mult[j][:index]
#layer[j] = layer[j][index:]+layer[j][:index]
else:
if j==0:
# close to next two curves median point
co_find = np.mean(median_points[j+1:j+3],axis=0)
else:
co_find = vertices[j-1][-1]
co, index, dist = kd.find(co_find)
vertices[j] = vertices[j][index:]+vertices[j][:index+1]
else:
if j > 0:
p0 = curve[0]
p1 = curve[-1]
last = vertices[j-1][-1]
d0 = (last-p0).length
d1 = (last-p1).length
if d1 < d0: vertices[j].reverse()
'''
# close shapes
if props.close_all:
for i in range(len(vertices)):
vertices[i].append(vertices[i][0])
#flow_mult[i].append(flow_mult[i][0])
#layer[i].append(layer[i][0])
'''
# calc bounding box
min_corner = np.min(vertices[0],axis=0)
max_corner = np.max(vertices[0],axis=0)
for i in range(1,len(vertices)):
eval_points = vertices[i] + [min_corner]
min_corner = np.min(eval_points,axis=0)
eval_points = vertices[i] + [max_corner]
max_corner = np.max(eval_points,axis=0)
# initialize variables
e = 0
last_vert = Vector((0,0,0))
maxz = 0
path_length = 0
travel_length = 0
printed_verts = []
printed_edges = []
travel_verts = []
travel_edges = []
# write movements
for i in range(len(vertices)):
curve = vertices[i]
first_id = len(printed_verts)
for j in range(len(curve)):
v = curve[j]
v_flow_mult = flow_mult#[i][j]
v_layer = layer#[i][j]
# record max z
maxz = np.max((maxz,v[2]))
#maxz = max(maxz,v[2])
# first point of the gcode
if i == j == 0:
printed_verts.append(v)
if(export):
file.write('G92 E0 \n')
params = v[:3] + (feed,)
to_write = 'G1 X{0:.4f} Y{1:.4f} Z{2:.4f} F{3:.0f}\n'.format(*params)
file.write(to_write)
else:
# start after retraction
if j == 0 and props.gcode_mode == 'RETR':
if(export):
params = v[:2] + (maxz+props.dz,) + (feed_h,)
to_write = 'G1 X{0:.4f} Y{1:.4f} Z{2:.4f} F{3:.0f}\n'.format(*params)
file.write(to_write)
params = v[:3] + (feed_v,)
to_write = 'G1 X{0:.4f} Y{1:.4f} Z{2:.4f} F{3:.0f}\n'.format(*params)
file.write(to_write)
to_write = 'G1 F{:.0f}\n'.format(feed)
file.write(to_write)
if props.retraction_mode == 'GCODE':
e += props.push
file.write( 'G1 E' + format(e, '.4f') + '\n')
else:
file.write('G11\n')
printed_verts.append((v[0], v[1], maxz+props.dz))
travel_edges.append((len(printed_verts)-1, len(printed_verts)-2))
travel_length += (Vector(printed_verts[-1])-Vector(printed_verts[-2])).length
printed_verts.append(v)
travel_edges.append((len(printed_verts)-1, len(printed_verts)-2))
travel_length += maxz+props.dz - v[2]
# regular extrusion
else:
printed_verts.append(v)
v1 = Vector(v)
v0 = Vector(curve[j-1])
dist = (v1-v0).length
area = v_layer * props.nozzle + pi*(v_layer/2)**2 # rectangle + circle
cylinder = pi*(props.filament/2)**2
flow = area / cylinder * (0 if j == 0 else 1)
e += dist * v_flow_mult * flow
params = v[:3] + (e,)
if(export):
to_write = 'G1 X{0:.4f} Y{1:.4f} Z{2:.4f} E{3:.4f}\n'.format(*params)
file.write(to_write)
path_length += dist
printed_edges.append([len(printed_verts)-1, len(printed_verts)-2])
if props.gcode_mode == 'RETR':
v0 = Vector(curve[-1])
if props.close_all and False:
#printed_verts.append(v0)
printed_edges.append([len(printed_verts)-1, first_id])
v1 = Vector(curve[0])
dist = (v0-v1).length
area = v_layer * props.nozzle + pi*(v_layer/2)**2 # rectangle + circle
cylinder = pi*(props.filament/2)**2
flow = area / cylinder
e += dist * v_flow_mult * flow
params = v1[:3] + (e,)
if(export):
to_write = 'G1 X{0:.4f} Y{1:.4f} Z{2:.4f} E{3:.4f}\n'.format(*params)
file.write(to_write)
path_length += dist
v0 = v1
if i < len(vertices)-1:
if(export):
if props.retraction_mode == 'GCODE':
e -= props.pull
file.write('G0 E' + format(e, '.4f') + '\n')
else:
file.write('G10\n')
params = v0[:2] + (maxz+props.dz,) + (feed_v,)
to_write = 'G1 X{0:.4f} Y{1:.4f} Z{2:.4f} F{3:.0f}\n'.format(*params)
file.write(to_write)
printed_verts.append(v0.to_tuple())
printed_verts.append((v0.x, v0.y, maxz+props.dz))
travel_edges.append((len(printed_verts)-1, len(printed_verts)-2))
travel_length += maxz+props.dz - v0.z
if(export):
# end code
try:
for line in bpy.data.texts[props.end_code].lines:
file.write(line.body + '\n')
except:
pass
file.close()
print("Saved gcode to " + path)
bb = list(min_corner) + list(max_corner)
info = 'Bounding Box:\n'
info += '\tmin\tX: {0:.1f}\tY: {1:.1f}\tZ: {2:.1f}\n'.format(*bb)
info += '\tmax\tX: {3:.1f}\tY: {4:.1f}\tZ: {5:.1f}\n'.format(*bb)
info += 'Extruded Filament: ' + format(e, '.2f') + '\n'
info += 'Extruded Volume: ' + format(e*pi*(props.filament/2)**2, '.2f') + '\n'
info += 'Printed Path Length: ' + format(path_length, '.2f') + '\n'
info += 'Travel Length: ' + format(travel_length, '.2f')
'''
# animate
if scene.animate:
scene = bpy.context.scene
try:
param = (scene.frame_current - scene.frame_start)/(scene.frame_end - scene.frame_start)
except:
param = 1
last_vert = max(int(param*len(printed_verts)),1)
printed_verts = printed_verts[:last_vert]
printed_edges = [e for e in printed_edges if e[0] < last_vert and e[1] < last_vert]
travel_edges = [e for e in travel_edges if e[0] < last_vert and e[1] < last_vert]
'''
return {'FINISHED'}