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eedbcb6a2d
When multiplying objects or inserting objects in the scene that do not fit in the buildplate, those objects would correctly end up outside the buildplate, but their Z position would be aligned at the absolute Z=0 of the buildplate. This commit fixes that by compensating in the z-axis, properly moving the object outside the buildplate in the correct z-position so that it's bottom is aligned with the original object. CURA-7440
131 lines
5.6 KiB
Python
131 lines
5.6 KiB
Python
import numpy
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from pynest2d import Point, Box, Item, NfpConfig, nest
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from typing import List, TYPE_CHECKING, Optional, Tuple
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from UM.Math.Matrix import Matrix
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from UM.Math.Polygon import Polygon
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from UM.Math.Quaternion import Quaternion
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from UM.Math.Vector import Vector
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from UM.Operations.GroupedOperation import GroupedOperation
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from UM.Operations.RotateOperation import RotateOperation
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from UM.Operations.TranslateOperation import TranslateOperation
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if TYPE_CHECKING:
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from UM.Scene.SceneNode import SceneNode
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from cura.BuildVolume import BuildVolume
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def findNodePlacement(nodes_to_arrange: List["SceneNode"], build_volume: "BuildVolume", fixed_nodes: Optional[List["SceneNode"]] = None, factor = 10000) -> Tuple[bool, List[Item]]:
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"""
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Find placement for a set of scene nodes, but don't actually move them just yet.
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:param nodes_to_arrange: The list of nodes that need to be moved.
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:param build_volume: The build volume that we want to place the nodes in. It gets size & disallowed areas from this.
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:param fixed_nodes: List of nods that should not be moved, but should be used when deciding where the others nodes
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are placed.
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:param factor: The library that we use is int based. This factor defines how accurate we want it to be.
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:return:
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"""
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machine_width = build_volume.getWidth()
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machine_depth = build_volume.getDepth()
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build_plate_bounding_box = Box(machine_width * factor, machine_depth * factor)
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if fixed_nodes is None:
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fixed_nodes = []
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# Add all the items we want to arrange
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node_items = []
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for node in nodes_to_arrange:
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hull_polygon = node.callDecoration("getConvexHull")
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converted_points = []
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for point in hull_polygon.getPoints():
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converted_points.append(Point(point[0] * factor, point[1] * factor))
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item = Item(converted_points)
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node_items.append(item)
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# Use a tiny margin for the build_plate_polygon (the nesting doesn't like overlapping disallowed areas)
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half_machine_width = 0.5 * machine_width - 1
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half_machine_depth = 0.5 * machine_depth - 1
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build_plate_polygon = Polygon(numpy.array([
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[half_machine_width, -half_machine_depth],
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[-half_machine_width, -half_machine_depth],
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[-half_machine_width, half_machine_depth],
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[half_machine_width, half_machine_depth]
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], numpy.float32))
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disallowed_areas = build_volume.getDisallowedAreas()
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num_disallowed_areas_added = 0
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for area in disallowed_areas:
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converted_points = []
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# Clip the disallowed areas so that they don't overlap the bounding box (The arranger chokes otherwise)
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clipped_area = area.intersectionConvexHulls(build_plate_polygon)
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for point in clipped_area.getPoints():
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converted_points.append(Point(point[0] * factor, point[1] * factor))
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disallowed_area = Item(converted_points)
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disallowed_area.markAsFixedInBin(0)
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node_items.append(disallowed_area)
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num_disallowed_areas_added += 1
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for node in fixed_nodes:
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converted_points = []
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hull_polygon = node.callDecoration("getConvexHull")
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for point in hull_polygon.getPoints():
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converted_points.append(Point(point[0] * factor, point[1] * factor))
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item = Item(converted_points)
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node_items.append(item)
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item.markAsFixedInBin(0)
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node_items.append(item)
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num_disallowed_areas_added += 1
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config = NfpConfig()
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config.accuracy = 1.0
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num_bins = nest(node_items, build_plate_bounding_box, 10000, config)
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# Strip the disallowed areas from the results again
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if num_disallowed_areas_added != 0:
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node_items = node_items[:-num_disallowed_areas_added]
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found_solution_for_all = num_bins == 1
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return found_solution_for_all, node_items
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def arrange(nodes_to_arrange: List["SceneNode"], build_volume: "BuildVolume", fixed_nodes: Optional[List["SceneNode"]] = None, factor = 10000) -> bool:
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"""
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Find placement for a set of scene nodes, and move them by using a single grouped operation.
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:param nodes_to_arrange: The list of nodes that need to be moved.
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:param build_volume: The build volume that we want to place the nodes in. It gets size & disallowed areas from this.
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:param fixed_nodes: List of nods that should not be moved, but should be used when deciding where the others nodes
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are placed.
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:param factor: The library that we use is int based. This factor defines how accuracte we want it to be.
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:return:
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"""
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found_solution_for_all, node_items = findNodePlacement(nodes_to_arrange, build_volume, fixed_nodes, factor)
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not_fit_count = 0
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grouped_operation = GroupedOperation()
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for node, node_item in zip(nodes_to_arrange, node_items):
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if node_item.binId() == 0:
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# We found a spot for it
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rotation_matrix = Matrix()
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rotation_matrix.setByRotationAxis(node_item.rotation(), Vector(0, -1, 0))
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grouped_operation.addOperation(RotateOperation(node, Quaternion.fromMatrix(rotation_matrix)))
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grouped_operation.addOperation(TranslateOperation(node, Vector(node_item.translation().x() / factor, 0,
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node_item.translation().y() / factor)))
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else:
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# We didn't find a spot
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grouped_operation.addOperation(
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TranslateOperation(node, Vector(200, node.getWorldPosition().y, -not_fit_count * 20), set_position = True))
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not_fit_count += 1
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grouped_operation.push()
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return found_solution_for_all
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