mirror of
https://git.mirrors.martin98.com/https://github.com/Ultimaker/Cura
synced 2025-05-08 04:09:02 +08:00
b6e997c88d
SimulationView. This commit also adapts the code in order to accept the messages coming from the engine, with information about feedrates and line thicknesses. Add also some changes in the GCodeReader that reads feedrates and line thickness from the gcode file.
434 lines
18 KiB
Python
Executable File
434 lines
18 KiB
Python
Executable File
# Copyright (c) 2017 Aleph Objects, Inc.
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# Cura is released under the terms of the LGPLv3 or higher.
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from UM.Application import Application
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from UM.Backend import Backend
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from UM.Job import Job
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from UM.Logger import Logger
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from UM.Math.AxisAlignedBox import AxisAlignedBox
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from UM.Math.Vector import Vector
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from UM.Mesh.MeshReader import MeshReader
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from UM.Message import Message
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from UM.Scene.SceneNode import SceneNode
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from UM.i18n import i18nCatalog
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from UM.Preferences import Preferences
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catalog = i18nCatalog("cura")
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from cura import LayerDataBuilder
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from cura import LayerDataDecorator
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from cura.LayerPolygon import LayerPolygon
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from cura.GCodeListDecorator import GCodeListDecorator
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from cura.Settings.ExtruderManager import ExtruderManager
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import numpy
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import math
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import re
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from collections import namedtuple
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# Class for loading and parsing G-code files
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class GCodeReader(MeshReader):
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def __init__(self):
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super(GCodeReader, self).__init__()
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self._supported_extensions = [".gcode", ".g"]
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Application.getInstance().hideMessageSignal.connect(self._onHideMessage)
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self._cancelled = False
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self._message = None
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self._layer_number = 0
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self._extruder_number = 0
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self._clearValues()
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self._scene_node = None
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# X, Y, Z position, F feedrate and E extruder values are stored
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self._position = namedtuple('Position', ['x', 'y', 'z', 'f', 'e'])
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self._is_layers_in_file = False # Does the Gcode have the layers comment?
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self._extruder_offsets = {} # Offsets for multi extruders. key is index, value is [x-offset, y-offset]
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self._current_layer_thickness = 0.2 # default
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Preferences.getInstance().addPreference("gcodereader/show_caution", True)
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def _clearValues(self):
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self._filament_diameter = 2.85
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self._extruder_number = 0
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self._extrusion_length_offset = [0]
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self._layer_type = LayerPolygon.Inset0Type
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self._layer_number = 0
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self._previous_z = 0
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self._layer_data_builder = LayerDataBuilder.LayerDataBuilder()
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self._center_is_zero = False
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self._is_absolute_positioning = True # It can be absolute (G90) or relative (G91)
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@staticmethod
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def _getValue(line, code):
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n = line.find(code)
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if n < 0:
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return None
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n += len(code)
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pattern = re.compile("[;\s]")
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match = pattern.search(line, n)
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m = match.start() if match is not None else -1
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try:
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if m < 0:
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return line[n:]
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return line[n:m]
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except:
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return None
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def _getInt(self, line, code):
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value = self._getValue(line, code)
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try:
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return int(value)
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except:
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return None
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def _getFloat(self, line, code):
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value = self._getValue(line, code)
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try:
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return float(value)
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except:
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return None
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def _onHideMessage(self, message):
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if message == self._message:
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self._cancelled = True
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@staticmethod
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def _getNullBoundingBox():
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return AxisAlignedBox(minimum=Vector(0, 0, 0), maximum=Vector(10, 10, 10))
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def _createPolygon(self, layer_thickness, path, extruder_offsets):
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countvalid = 0
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for point in path:
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if point[5] > 0:
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countvalid += 1
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if countvalid >= 2:
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# we know what to do now, no need to count further
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continue
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if countvalid < 2:
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return False
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try:
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self._layer_data_builder.addLayer(self._layer_number)
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self._layer_data_builder.setLayerHeight(self._layer_number, path[0][2])
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self._layer_data_builder.setLayerThickness(self._layer_number, layer_thickness)
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this_layer = self._layer_data_builder.getLayer(self._layer_number)
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except ValueError:
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return False
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count = len(path)
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line_types = numpy.empty((count - 1, 1), numpy.int32)
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line_widths = numpy.empty((count - 1, 1), numpy.float32)
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line_thicknesses = numpy.empty((count - 1, 1), numpy.float32)
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line_feedrates = numpy.empty((count - 1, 1), numpy.float32)
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line_widths[:, 0] = 0.35 # Just a guess
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line_thicknesses[:, 0] = layer_thickness
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points = numpy.empty((count, 3), numpy.float32)
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extrusion_values = numpy.empty((count, 1), numpy.float32)
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i = 0
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for point in path:
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points[i, :] = [point[0] + extruder_offsets[0], point[2], -point[1] - extruder_offsets[1]]
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extrusion_values[i] = point[4]
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if i > 0:
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line_feedrates[i - 1] = point[3]
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line_types[i - 1] = point[5]
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if point[5] in [LayerPolygon.MoveCombingType, LayerPolygon.MoveRetractionType]:
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line_widths[i - 1] = 0.1
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line_thicknesses[i - 1] = 0.0 # Travels are set as zero thickness lines
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else:
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line_widths[i - 1] = self._calculateLineWidth(points[i], points[i-1], extrusion_values[i], extrusion_values[i-1], layer_thickness)
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i += 1
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this_poly = LayerPolygon(self._extruder_number, line_types, points, line_widths, line_thicknesses, line_feedrates)
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this_poly.buildCache()
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this_layer.polygons.append(this_poly)
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return True
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def _calculateLineWidth(self, current_point, previous_point, current_extrusion, previous_extrusion, layer_thickness):
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# Area of the filament
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Af = (self._filament_diameter / 2) ** 2 * numpy.pi
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# Length of the extruded filament
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de = current_extrusion - previous_extrusion
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# Volumne of the extruded filament
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dVe = de * Af
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# Length of the printed line
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dX = numpy.sqrt((current_point[0] - previous_point[0])**2 + (current_point[2] - previous_point[2])**2)
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# When the extruder recovers from a retraction, we get zero distance
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if dX == 0:
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return 0.1
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# Area of the printed line. This area is a rectangle
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Ae = dVe / dX
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# This area is a rectangle with area equal to layer_thickness * layer_width
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line_width = Ae / layer_thickness
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# A threshold is set to avoid weird paths in the GCode
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if line_width > 1.2:
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return 0.35
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return line_width
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def _gCode0(self, position, params, path):
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x, y, z, f, e = position
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if self._is_absolute_positioning:
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x = params.x if params.x is not None else x
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y = params.y if params.y is not None else y
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z = params.z if params.z is not None else z
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else:
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x += params.x if params.x is not None else 0
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y += params.y if params.y is not None else 0
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z += params.z if params.z is not None else 0
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f = params.f if params.f is not None else f
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if params.e is not None:
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new_extrusion_value = params.e if self._is_absolute_positioning else e[self._extruder_number] + params.e
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if new_extrusion_value > e[self._extruder_number]:
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path.append([x, y, z, f, params.e + self._extrusion_length_offset[self._extruder_number], self._layer_type]) # extrusion
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else:
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path.append([x, y, z, f, params.e + self._extrusion_length_offset[self._extruder_number], LayerPolygon.MoveRetractionType]) # retraction
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e[self._extruder_number] = new_extrusion_value
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# Only when extruding we can determine the latest known "layer height" which is the difference in height between extrusions
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# Also, 1.5 is a heuristic for any priming or whatsoever, we skip those.
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if z > self._previous_z and (z - self._previous_z < 1.5):
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self._current_layer_thickness = z - self._previous_z # allow a tiny overlap
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self._previous_z = z
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else:
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path.append([x, y, z, f, e[self._extruder_number] + self._extrusion_length_offset[self._extruder_number], LayerPolygon.MoveCombingType])
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return self._position(x, y, z, f, e)
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# G0 and G1 should be handled exactly the same.
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_gCode1 = _gCode0
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## Home the head.
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def _gCode28(self, position, params, path):
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return self._position(
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params.x if params.x is not None else position.x,
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params.y if params.y is not None else position.y,
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0,
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position.f,
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position.e)
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## Set the absolute positioning
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def _gCode90(self, position, params, path):
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self._is_absolute_positioning = True
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return position
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## Set the relative positioning
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def _gCode91(self, position, params, path):
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self._is_absolute_positioning = False
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return position
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## Reset the current position to the values specified.
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# For example: G92 X10 will set the X to 10 without any physical motion.
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def _gCode92(self, position, params, path):
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if params.e is not None:
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# Sometimes a G92 E0 is introduced in the middle of the GCode so we need to keep those offsets for calculate the line_width
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self._extrusion_length_offset[self._extruder_number] += position.e[self._extruder_number] - params.e
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position.e[self._extruder_number] = params.e
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return self._position(
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params.x if params.x is not None else position.x,
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params.y if params.y is not None else position.y,
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params.z if params.z is not None else position.z,
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params.f if params.f is not None else position.f,
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position.e)
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def _processGCode(self, G, line, position, path):
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func = getattr(self, "_gCode%s" % G, None)
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line = line.split(";", 1)[0] # Remove comments (if any)
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if func is not None:
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s = line.upper().split(" ")
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x, y, z, f, e = None, None, None, None, None
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for item in s[1:]:
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if len(item) <= 1:
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continue
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if item.startswith(";"):
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continue
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if item[0] == "X":
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x = float(item[1:])
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if item[0] == "Y":
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y = float(item[1:])
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if item[0] == "Z":
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z = float(item[1:])
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if item[0] == "F":
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f = float(item[1:]) / 60
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if item[0] == "E":
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e = float(item[1:])
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if self._is_absolute_positioning and ((x is not None and x < 0) or (y is not None and y < 0)):
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self._center_is_zero = True
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params = self._position(x, y, z, f, e)
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return func(position, params, path)
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return position
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def _processTCode(self, T, line, position, path):
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self._extruder_number = T
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if self._extruder_number + 1 > len(position.e):
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self._extrusion_length_offset.extend([0] * (self._extruder_number - len(position.e) + 1))
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position.e.extend([0] * (self._extruder_number - len(position.e) + 1))
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return position
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_type_keyword = ";TYPE:"
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_layer_keyword = ";LAYER:"
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## For showing correct x, y offsets for each extruder
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def _extruderOffsets(self):
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result = {}
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for extruder in ExtruderManager.getInstance().getExtruderStacks():
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result[int(extruder.getMetaData().get("position", "0"))] = [
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extruder.getProperty("machine_nozzle_offset_x", "value"),
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extruder.getProperty("machine_nozzle_offset_y", "value")]
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return result
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def read(self, file_name):
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Logger.log("d", "Preparing to load %s" % file_name)
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self._cancelled = False
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# We obtain the filament diameter from the selected printer to calculate line widths
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self._filament_diameter = Application.getInstance().getGlobalContainerStack().getProperty("material_diameter", "value")
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scene_node = SceneNode()
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# Override getBoundingBox function of the sceneNode, as this node should return a bounding box, but there is no
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# real data to calculate it from.
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scene_node.getBoundingBox = self._getNullBoundingBox
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gcode_list = []
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self._is_layers_in_file = False
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Logger.log("d", "Opening file %s" % file_name)
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self._extruder_offsets = self._extruderOffsets() # dict with index the extruder number. can be empty
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last_z = 0
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with open(file_name, "r") as file:
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file_lines = 0
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current_line = 0
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for line in file:
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file_lines += 1
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gcode_list.append(line)
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if not self._is_layers_in_file and line[:len(self._layer_keyword)] == self._layer_keyword:
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self._is_layers_in_file = True
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file.seek(0)
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file_step = max(math.floor(file_lines / 100), 1)
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self._clearValues()
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self._message = Message(catalog.i18nc("@info:status", "Parsing G-code"),
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lifetime=0,
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title = catalog.i18nc("@info:title", "G-code Details"))
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self._message.setProgress(0)
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self._message.show()
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Logger.log("d", "Parsing %s..." % file_name)
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current_position = self._position(0, 0, 0, 0, [0])
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current_path = []
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for line in file:
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if self._cancelled:
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Logger.log("d", "Parsing %s cancelled" % file_name)
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return None
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current_line += 1
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last_z = current_position.z
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if current_line % file_step == 0:
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self._message.setProgress(math.floor(current_line / file_lines * 100))
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Job.yieldThread()
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if len(line) == 0:
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continue
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if line.find(self._type_keyword) == 0:
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type = line[len(self._type_keyword):].strip()
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if type == "WALL-INNER":
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self._layer_type = LayerPolygon.InsetXType
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elif type == "WALL-OUTER":
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self._layer_type = LayerPolygon.Inset0Type
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elif type == "SKIN":
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self._layer_type = LayerPolygon.SkinType
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elif type == "SKIRT":
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self._layer_type = LayerPolygon.SkirtType
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elif type == "SUPPORT":
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self._layer_type = LayerPolygon.SupportType
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elif type == "FILL":
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self._layer_type = LayerPolygon.InfillType
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else:
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Logger.log("w", "Encountered a unknown type (%s) while parsing g-code.", type)
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# When the layer change is reached, the polygon is computed so we have just one layer per layer per extruder
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if self._is_layers_in_file and line[:len(self._layer_keyword)] == self._layer_keyword:
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try:
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layer_number = int(line[len(self._layer_keyword):])
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self._createPolygon(self._current_layer_thickness, current_path, self._extruder_offsets.get(self._extruder_number, [0, 0]))
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current_path.clear()
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self._layer_number = layer_number
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except:
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pass
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# This line is a comment. Ignore it (except for the layer_keyword)
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if line.startswith(";"):
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continue
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G = self._getInt(line, "G")
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if G is not None:
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# When find a movement, the new posistion is calculated and added to the current_path, but
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# don't need to create a polygon until the end of the layer
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current_position = self._processGCode(G, line, current_position, current_path)
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continue
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# When changing the extruder, the polygon with the stored paths is computed
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if line.startswith("T"):
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T = self._getInt(line, "T")
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if T is not None:
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self._createPolygon(self._current_layer_thickness, current_path, self._extruder_offsets.get(self._extruder_number, [0, 0]))
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current_path.clear()
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current_position = self._processTCode(T, line, current_position, current_path)
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# "Flush" leftovers. Last layer paths are still stored
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if len(current_path) > 1:
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if self._createPolygon(self._current_layer_thickness, current_path, self._extruder_offsets.get(self._extruder_number, [0, 0])):
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self._layer_number += 1
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current_path.clear()
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material_color_map = numpy.zeros((10, 4), dtype = numpy.float32)
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material_color_map[0, :] = [0.0, 0.7, 0.9, 1.0]
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material_color_map[1, :] = [0.7, 0.9, 0.0, 1.0]
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layer_mesh = self._layer_data_builder.build(material_color_map)
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decorator = LayerDataDecorator.LayerDataDecorator()
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decorator.setLayerData(layer_mesh)
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scene_node.addDecorator(decorator)
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gcode_list_decorator = GCodeListDecorator()
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gcode_list_decorator.setGCodeList(gcode_list)
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scene_node.addDecorator(gcode_list_decorator)
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Application.getInstance().getController().getScene().gcode_list = gcode_list
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Logger.log("d", "Finished parsing %s" % file_name)
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self._message.hide()
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if self._layer_number == 0:
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Logger.log("w", "File %s doesn't contain any valid layers" % file_name)
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settings = Application.getInstance().getGlobalContainerStack()
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machine_width = settings.getProperty("machine_width", "value")
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machine_depth = settings.getProperty("machine_depth", "value")
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if not self._center_is_zero:
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scene_node.setPosition(Vector(-machine_width / 2, 0, machine_depth / 2))
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Logger.log("d", "Loaded %s" % file_name)
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if Preferences.getInstance().getValue("gcodereader/show_caution"):
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caution_message = Message(catalog.i18nc(
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"@info:generic",
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"Make sure the g-code is suitable for your printer and printer configuration before sending the file to it. The g-code representation may not be accurate."),
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lifetime=0,
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title = catalog.i18nc("@info:title", "G-code Details"))
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caution_message.show()
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# The "save/print" button's state is bound to the backend state.
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backend = Application.getInstance().getBackend()
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backend.backendStateChange.emit(Backend.BackendState.Disabled)
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return scene_node
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