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# Copyright (c) 2016-2022 Manfred Moitzi
# License: MIT License
from typing import cast
import pathlib
import ezdxf
from ezdxf.document import Drawing
CWD = pathlib.Path("~/Desktop/Outbox").expanduser()
if not CWD.exists():
CWD = pathlib.Path(".")
# ------------------------------------------------------------------------------
# setup DXF R2000 paperspace layout
#
# For most use cases a paperspace scaling of 1:1 is to prefer and important:
# the paperspace scaling has no influence on the VIEWPORT scaling - this is a
# total different topic, see example "viewports_in_paperspace.py"
#
# docs about layouts: https://ezdxf.mozman.at/docs/layouts/index.html
# ------------------------------------------------------------------------------
FILENAME = "page_setup_R2000.dxf"
def draw_raster(doc: Drawing):
marker = doc.blocks.new(name="MARKER")
attribs = {"color": 2}
marker.add_line((-1, 0), (1, 0), dxfattribs=attribs)
marker.add_line((0, -1), (0, 1), dxfattribs=attribs)
marker.add_circle((0, 0), 0.4, dxfattribs=attribs)
marker.add_attdef(
"XPOS", (0.5, -1.0), dxfattribs={"height": 0.25, "color": 4}
)
marker.add_attdef(
"YPOS", (0.5, -1.5), dxfattribs={"height": 0.25, "color": 4}
)
modelspace = doc.modelspace()
for x in range(10):
for y in range(10):
xcoord = x * 10
ycoord = y * 10
values = {
"XPOS": f"x = {xcoord}",
"YPOS": f"y = {ycoord}",
}
modelspace.add_auto_blockref("MARKER", (xcoord, ycoord), values)
def setup_active_viewport_configuration(doc: Drawing):
# This creates a multi-window configuration for the modelspace.
#
# delete the current '*Active' viewport configuration
doc.viewports.delete_config("*ACTIVE")
# the available display area in AutoCAD has the virtual lower-left
# corner (0, 0) and the virtual upper-right corner (1, 1)
# first viewport, uses the left half of the screen
viewport = doc.viewports.new("*ACTIVE")
viewport.dxf.lower_left = (0, 0)
viewport.dxf.upper_right = (0.5, 1)
# target point defines the origin of the DCS, this is the default value
viewport.dxf.target = (0, 0, 0)
# move this location (in DCS) to the center of the viewport
viewport.dxf.center = (40, 30)
# height of viewport in drawing units, this parameter works
viewport.dxf.height = 15
# aspect ratio of viewport (x/y)
viewport.dxf.aspect_ratio = 1.0
# second viewport, uses the right half of the screen
viewport = doc.viewports.new("*ACTIVE")
viewport.dxf.lower_left = (0.5, 0)
viewport.dxf.upper_right = (1, 1)
# target point defines the origin of the DCS
viewport.dxf.target = (60, 20, 0)
# move this location (in DCS, model space = 60, 20) to the center of the viewport
viewport.dxf.center = (0, 0)
# height of viewport in drawing units, this parameter works
viewport.dxf.height = 15
# aspect ratio of viewport (x/y)
viewport.dxf.aspect_ratio = 2.0
def setup_paperspace_layouts(doc: Drawing):
setup_layout1(doc)
setup_layout2(doc)
setup_layout3(doc)
setup_layout4(doc)
def setup_layout1(doc: Drawing):
from ezdxf.layouts import Paperspace
name = "Layout1"
if name in doc.layouts:
layout = cast(Paperspace, doc.layouts.get(name))
else:
layout = doc.layouts.new(name)
layout.page_setup(
size=(11, 8.5), margins=(0.5, 0.5, 0.5, 0.5), units="inch"
)
lower_left, upper_right = layout.get_paper_limits()
x1, y1 = lower_left
x2, y2 = upper_right
center = lower_left.lerp(upper_right)
# Add DXF entities to the "Layout1" in paperspace coordinates:
layout.add_line((x1, center.y), (x2, center.y)) # horizontal center line
layout.add_line((center.x, y1), (center.x, y2)) # vertical center line
layout.add_circle((0, 0), radius=0.1) # plot origin
def setup_layout2(doc: Drawing):
layout2 = doc.layouts.new("scale 1-1")
# The default paperspace scale is 1:1
# 1 mm printed is 1 drawing unit in paperspace
# For most use cases this is the preferred scaling and important fact:
# the paperspace scaling has no influence on the VIEWPORT scaling - this is
# a total different topic, see example "viewports_in_paperspace.py"
layout2.page_setup(size=(297, 210), margins=(10, 10, 10, 10), units="mm")
layout2.add_viewport(
# center of viewport in paperspace units
center=(100, 100),
# viewport size in paperspace units
size=(50, 50),
# modelspace point to show in center of viewport in WCS
view_center_point=(60, 40),
# how much modelspace area to show in viewport in drawing units
view_height=20,
status=2,
)
lower_left, upper_right = layout2.get_paper_limits()
x1, y1 = lower_left
x2, y2 = upper_right
center = lower_left.lerp(upper_right)
# Add DXF entities to the "Layout1" in paperspace coordinates:
layout2.add_line((x1, center.y), (x2, center.y)) # horizontal center line
layout2.add_line((center.x, y1), (center.x, y2)) # vertical center line
layout2.add_circle((0, 0), radius=5) # plot origin
def setup_layout3(doc: Drawing):
layout3 = doc.layouts.new("scale 1-50")
# The paperspace is scaled 1:50
# 1 mm printed is 50 drawing unit in paperspace
layout3.page_setup(
size=(297, 210), margins=(10, 10, 10, 10), units="mm", scale=(1, 50)
)
layout3.add_viewport(
# center of viewport in paperspace units, scale = 1:50
center=(5000, 5000),
# viewport size in paperspace units, scale = 1:50
size=(5000, 2500),
# model space point to show in center of viewport in WCS
view_center_point=(60, 40),
# how much model space area to show in viewport in drawing units
view_height=20,
status=2,
)
layout3.add_circle((0, 0), radius=250) # plot origin
def setup_layout4(doc: Drawing):
layout4 = doc.layouts.new("scale 1-1 with offset")
# The paperspace is scaled 1:1 but has a plot offset
# 1 mm printed is 1 drawing unit in paperspace
layout4.page_setup(
size=(297, 210),
margins=(10, 10, 10, 10),
units="mm",
scale=(1, 1),
offset=(50, 50),
)
lower_left, upper_right = layout4.get_paper_limits()
x1, y1 = lower_left
x2, y2 = upper_right
center = lower_left.lerp(upper_right)
layout4.add_line((x1, center.y), (x2, center.y)) # horizontal center line
layout4.add_line((center.x, y1), (center.x, y2)) # vertical center line
layout4.add_circle((0, 0), radius=5) # plot origin
def main():
doc = ezdxf.new("R2000")
draw_raster(doc)
setup_active_viewport_configuration(doc)
setup_paperspace_layouts(doc)
doc.saveas(CWD / FILENAME)
print(f'DXF file "{FILENAME}" created.')
if __name__ == "__main__":
main()
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