How to render text-paths as HATCH entities

[shine-flower]

Implement similar functions #715

The following code gets some paths, how to fill the lines in the text, you can set the density of the kind, fill a line every 1 mm.

doc = ezdxf.readfile('211.dxf')
msp = doc.modelspace()
height = 2.7
first_path = text2path.make_paths_from_str("厂牌AAA123", fonts.FontFace(family="SimHei"), (height * 1.45))
final_paths = path.transform_paths(first_path, Matrix44.translate(1.810846223812833, 1.482741896976211, 0))

path.render_splines_and_polylines(msp, final_paths, dxfattribs={"color": 1})
zoom.extents(msp)
doc.saveas("text2path.dxf")

Achieve the following results, Is there any demo or method to implement this function.

[mozman]

You have to render the text as HATCH entities. The first example shows how to render HATCHES with solid filling:

import ezdxf
from ezdxf.addons import text2path
from ezdxf.tools import fonts
from ezdxf.math import Matrix44
from ezdxf import zoom

doc = ezdxf.new()
msp = doc.modelspace()

hatches = text2path.make_hatches_from_str(
    "厂牌AAA123",
    font=fonts.FontFace(family="SimSun"),
    size=4,
)
m = Matrix44.translate(2, 1.5, 0)

for hatch in hatches:
    hatch.transform(m)
    hatch.set_solid_fill(color=1, style=0)
    msp.add_entity(hatch)

zoom.extents(msp)
doc.saveas("text2solid_hatch.dxf")

The HATCH entity can be filled with predefined patterns, but this involves much guessing:

...

for hatch in hatches:
    hatch.transform(m)
    hatch.set_pattern_fill(name="ANSI31", color=1, scale=0.02, angle=-45, style=0)
    msp.add_entity(hatch)

...

You have more control over the HATCH pattern by defining you own custom pattern:

...

# ANSI31 definition: [angle, base_point, offset, dash_length_items]
# "ANSI31": [[45.0, (0.0, 0.0), (-2.2450640303, 2.2450640303), []]]
OFFSET = (0, 0.05)  # (x, y)
SOLID = []  # continuous line
DASHED = [0.5, -0.3]  # > 0 line, < 0 gap, 0 = point
MY_PATTERN = [
    [0.0, (0.0, 0.0), OFFSET, SOLID],  # a single hatch line definition
]

for hatch in hatches:
    hatch.transform(m)
    hatch.set_pattern_fill(
        name="MY_PATTERN",
        color=1,
        style=0,
        pattern_type=2,
        definition=MY_PATTERN,
    )
    msp.add_entity(hatch)

...

For adding the outline path you have to render the text a second time as paths as in your original script.

[mozman]

Added an example script for this topic: https://github.com/mozman/ezdxf/blob/master/examples/addons/text_string_to_hatch.py

[shine-flower]

为此主题添加了示例脚本：https ://github.com/mozman/ezdxf/blob/master/examples/addons/text_string_to_hatch.py

Thank you very much for your reply.

[shine-flower]

After the above operation is completed, the filling is realized, which is a block in DXF, and it can not recognize the concept of block in the laser marking machine. I'll go into AutoCAD and run the 'explode' command, and the laser marker will identify the filled line.Does EZDXF have a way to implement the AutoCAD 'explode' function?
Before use 'explode' command

After use 'explode' command