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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 R12 paperspace layout
#
# The single paperspace layout of DXF R12 is not well-supported, it is preferable
# to use DXF R2000 or later if paperspace layouts are important for your project.
#
# docs about layouts: https://ezdxf.mozman.at/docs/layouts/index.html
# ------------------------------------------------------------------------------
FILENAME = "page_setup_R12.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 '*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
viewport.dxf.aspect_ratio = 1.0 # aspect ratio of viewport (x/y)
# 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(doc: Drawing):
from ezdxf.layouts import Paperspace
# DXF R12 supports just one paperspace layout
layout = cast(Paperspace, doc.layout())
layout.page_setup(size=(11, 8.5), margins=(1, 2, 1, 2), units="inch")
lower_left, upper_right = layout.get_paper_limits()
x1, y1 = lower_left
x2, y2 = upper_right
center = lower_left.lerp(upper_right)
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 main():
doc = ezdxf.new("R12")
draw_raster(doc)
setup_active_viewport_configuration(doc)
setup_paperspace(doc)
doc.saveas(CWD / FILENAME)
print(f'DXF file "{FILENAME}" created.')
if __name__ == "__main__":
main()
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