vheliotech-freecad/tools/generate-2d-drawings.py

import os
import sys
import asyncio
import math

sys.path.append(os.path.join(os.path.dirname(__file__), 'utils'))
import vspt_freecad
import vspt_coroutine

verbose = False

project_folder = os.getcwd()

async def generate_2d_drawing(file_name):
	doc = App.open(project_folder + '/' + file_name)
	
	page_name = doc.Name + '_Drawing'
	
	if doc.getObject(page_name) is not None:
		print('2D drawing already exists - skipped')
		return
	
	template_file_name = project_folder + '/lib/A4_Landscape_VSPT.svg'

	root_objects = []
	main_object = None

	for obj in doc.Objects:
		if len(obj.Parents) == 0:
			root_objects.append(obj)
			if obj.Label == doc.Name:
				main_object = obj

	if main_object is None and len(root_objects) == 1:
		main_object = root_objects[0]

	if main_object is None:
		raise Exception("Can't find main object in file " + doc.FileName + " (found " + str(len(root_objects)) + " root object(s), none named like the document " + doc.Name + ")")

	code_obj = doc.getObjectsByLabel('Code_Tube_Draft')
	if len(code_obj) == 1:
		code_obj = code_obj[0]
	else:
		code_obj = None

	sources = [main_object]

	bound_box = main_object.Shape.BoundBox
	proj_size = [0, 0, 0] # size of the original part front view after projection at scale 1:1
	if bound_box.XLength > bound_box.YLength:
		if bound_box.XLength > bound_box.ZLength:
			main_axis = 0
			proj_size[0] = bound_box.XLength
			proj_size[1] = bound_box.ZLength
			proj_size[2] = bound_box.YLength
		else:
			main_axis = 2
			proj_size[0] = bound_box.ZLength
			proj_size[1] = bound_box.XLength
			proj_size[2] = bound_box.YLength
	else:
		if bound_box.YLength > bound_box.ZLength:
			main_axis = 1
			proj_size[0] = bound_box.YLength
			proj_size[1] = bound_box.ZLength
			proj_size[2] = bound_box.XLength
		else:
			main_axis = 2
			proj_size[0] = bound_box.ZLength
			proj_size[1] = bound_box.XLength
			proj_size[2] = bound_box.YLength

	if verbose: print("Adding drawing page...");
			
	page = doc.addObject('TechDraw::DrawPage', page_name)
	template = doc.addObject('TechDraw::DrawSVGTemplate', 'Template')

	template.Template = template_file_name
	page.Template = template
	
	if verbose: print("Computing best scale...");
	scale_denominators = [4.0, 5.0, 6.0, 8.0, 10.0]
	scale_numerator = 1.0
	scale_denominator = scale_denominators[0]
	proj_total_size = [proj_size[0] + proj_size[2], proj_size[1] + proj_size[2]] # projected size of all views (without spacing) at scale 1:1
	spacingX = 20.0
	spacingY = 50.0
	maxSizeX = 280.0
	maxSizeY = 160.0
	for denom in scale_denominators:
		scale_denominator = denom
		if proj_total_size[0]*scale_numerator/denom + spacingX <= maxSizeX and proj_total_size[1]*scale_numerator/denom + spacingY <= maxSizeY:
			break

	if verbose: print("Adding projection group...");
	
	projGroup = doc.addObject('TechDraw::DrawProjGroup', doc.Name + '_ProjGroup')
	page.addView(projGroup)
	projGroup.ScaleType = 'Custom'
	projGroup.Scale = scale_numerator/scale_denominator
	projGroup.spacingX = 20.0
	projGroup.spacingY = 50.0
	projGroup.Source = sources
	projGroup.addProjection('Front')
	if main_axis == 0:
			projGroup.Anchor.Direction = App.Vector(0,1,0)
			projGroup.Anchor.XDirection = App.Vector(-1,0,0)
			projGroup.Anchor.RotationVector = App.Vector(-1,0,0)
	elif main_axis == 1:
			projGroup.Anchor.Direction = App.Vector(1,0,0)
			projGroup.Anchor.XDirection = App.Vector(0,1,0)
			projGroup.Anchor.RotationVector = App.Vector(0,1,0)
	elif main_axis == 2:
			projGroup.Anchor.Direction = App.Vector(0,1,0)
			projGroup.Anchor.XDirection = App.Vector(0,0,1)
			projGroup.Anchor.RotationVector = App.Vector(0,0,1)
	projGroup.addProjection('Top')
	projGroup.addProjection('Left')
	projGroup.X = 130.0
	projGroup.Y = 150.0

	texts = page.Template.EditableTexts
	texts['SCALE'] = str(int(scale_numerator+0.5))+':'+str(int(scale_denominator+0.5))
	try:
		texts['PM'] = main_object.Assembly_handbook_Material
	except:
		pass
	texts['PN'] = doc.Name
	texts['TITLELINE-1'] = doc.Name
	page.Template.EditableTexts = texts

	async def addDimensions():
		for view in projGroup.Views:
			if verbose: print("View: " + view.Label + "...")

			edges = []
			visibleEdges = view.getVisibleEdges()
			edgeIdx = 0
			lowestEdgeName = ''
			lowestEdgePos = 1000000
			while True:
				try:
					edge = view.getEdgeByIndex(edgeIdx)
				except:
					break
				edges.append(edge)

				if edge.BoundBox.YLength < 0.01 and edge.BoundBox.Center.y < lowestEdgePos:
					lowestEdgePos = edge.BoundBox.Center.y
					lowestEdgeName = 'Edge' + str(edgeIdx)

				edgeIdx = edgeIdx + 1
			
			vertices = []
			vertIdx = 0
			while True:
				try:
					vert = view.getVertexByIndex(vertIdx)
				except:
					break
				vertices.append(vert)
				vertIdx = vertIdx + 1

			def getFeatureName(edge):
				if edge.Curve.TypeId == 'Part::GeomCircle':
					vertIdx = 0
					c = edge.BoundBox.Center
					closestDist = 100000000
					closestVert = None
					for vert in vertices:
						dx = vert.X - c.x
						dy = vert.Y - c.y
						dist = math.sqrt(dx*dx + dy*dy)
						if dist < closestDist:
							closestDist = dist
							closestVert = vert
						vertIdx = vertIdx + 1
					if closestVert is not None:
						return 'Vertex' + str(vertices.index(closestVert))
					else:
						return ''
				else:
					return 'Edge'+str(edges.index(edge))

			if verbose: print("Listing features...")
			features = []
			for edge in edges:
				if (edge.Curve.TypeId == 'Part::GeomLine' and edge.BoundBox.XLength <= 0.01) or (edge.Curve.TypeId == 'Part::GeomCircle' and abs(edge.Curve.Radius * 2.0 - edge.BoundBox.XLength) < 0.001 and abs(edge.Curve.Radius * 2.0 - edge.BoundBox.YLength) < 0.001):
					featureName = getFeatureName(edge)
					if featureName == '':
						continue
					
					pos = edge.BoundBox.Center.x
					duplicate = False
					for otherFeature in features:
						if abs(otherFeature[0] - pos) < 0.1:
							duplicate = True
							break
					if not duplicate:
						features.append((pos, edge, featureName))
			features.sort(key=lambda e: e[0])

			def addDimension(edgeA, edgeB, posY):
				dim = doc.addObject('TechDraw::DrawViewDimension','Dimension')
				dim.Type = 'DistanceX'
				dim.FormatSpec = '%.1f'
				dim.References2D = [(view, (getFeatureName(edgeA), getFeatureName(edgeB)))]
				visibleEdgeA = visibleEdges[edges.index(edgeA)]
				visibleEdgeB = visibleEdges[edges.index(edgeB)]
				dim.X = (visibleEdgeA.BoundBox.Center.x + visibleEdgeB.BoundBox.Center.x) * 0.5
				dim.Y = posY
				page.addView(dim)

				if edgeB.Curve.TypeId == 'Part::GeomCircle': 
					if abs(edgeB.BoundBox.XLength - 6.5) > 0.01:
						dim = doc.addObject('TechDraw::DrawViewDimension','Dimension')
						dim.Type = 'Diameter'
						dim.FormatSpec = '%.1f'
						dim.References2D = [(view, ('Edge'+str(edges.index(edgeB)),))]
						dim.X = visibleEdgeB.BoundBox.Center.x + 6.0
						dim.Y = -6.0
						page.addView(dim)

					if abs(edgeB.BoundBox.Center.y) > 0.01 and lowestEdgeName != '':
						dim = doc.addObject('TechDraw::DrawViewDimension','Dimension')
						dim.Type = 'DistanceY'
						dim.FormatSpec = '%.1f'
						dim.References2D = [(view, (getFeatureName(edgeB),lowestEdgeName))]
						dim.X = visibleEdgeB.BoundBox.Center.x + 2.0
						dim.Y = -6.0
						page.addView(dim)

			if verbose: print("Adding dimensions...")
						
			if len(features) >= 2:
				if projGroup.Views.index(view) != 0:
					addDimension(features[0][1], features[len(features)-1][1], -25.0)

				if len(features) > 2:
					for featureIdx in range(0, len(features) - 1):
						if featureIdx == 0 or features[featureIdx][1].Curve.TypeId != 'Part::GeomLine':
							addDimension(features[featureIdx][1], features[featureIdx + 1][1], 15.0)

		if verbose: print("Adding secondary objects...")
		if code_obj is not None:
			projGroup.Source = projGroup.Source + [code_obj]

	page.recompute(True)
	await vspt_coroutine.get_main_loop().wait(1)
	await addDimensions()
	
	if verbose: print("Saving...")
	page.recompute(True)
	page.ViewObject.Visibility = False # don't save the document with the page open or it will automatically reopen on load
	doc.save()
	
	if verbose: print("Closing...")
	vspt_freecad.close_all_docs()

async def run():
	try:
		folders = [
			'tubes'
		]

		for folder in folders:
			files = os.listdir(project_folder + '/' + folder)
			for source_file in files:
				if not source_file.endswith('.FCStd'): continue
				source_path = folder + '/' + source_file
				print(source_path)
				await generate_2d_drawing(source_path)
				
		# exit FreeCAD
		vspt_freecad.close_all_docs()
		FreeCADGui.getMainWindow().close()

	except Exception as e:
		print(e)

vspt_coroutine.get_main_loop().create_task(run())