用python生成 dxf 文件

安装dxf模块后，就可以用python 画图，生成dxf文件。

下面是我写的一个示例，用来画很多个不相交的、大小和位置都随机的圆构成的多孔图形。

import sdxf as s
import random
from random import random, randint

d = s.Drawing()
d.append(s.Text('圆的世界!', point=(0, 105, 1)))
# d.append(s.Line(points=[(0, 0, 0), (1, 1, 1)]))  # 画线段


c0, r0 = (0, 0, 0), 100  # 外围大圆的中心和半径
# d.append(s.Arc(center=c0, radius=r0, startAngle=0.0, endAngle=90))  # 画圆弧
d.append(s.Circle(center=c0, radius=r0))  # 画圆

siblings = []  # 格式[((x1,y1,z1),r1),((x2,y2,z2),r2)...]
r_lsl, r_usl = 3, 15
xy_lsl, xy_usl = -100, 100

i = 0
j = 0
while i <= 1000 and j <= 100000:
    r = randint(r_lsl, r_usl)
    center = xy_lsl+(xy_usl-xy_lsl)*random(), xy_lsl+(xy_usl-xy_lsl)*random(), 0

    # 需在大圆内部
    dx = center[0] - c0[0]
    dy = center[1] - c0[1]
    if dx*dx + dy*dy >= (r0-r)*(r0-r):
        continue

    # 需在所有小圆的外面
    for circle in siblings:
        dx = center[0] - circle[0][0]
        dy = center[1] - circle[0][1]
        if dx*dx + dy*dy <= (circle[1]+r)*(circle[1]+r):
            break
    else:
        d.append(s.Circle(center=center, radius=r))
        siblings.append((center, r))
        print(f"r= {r}, center= {center}")
        i += 1

    j += 1

d.saveas(r'k:\circle world.dxf')

# help(s)

该python代码生成的dxf文件在CAD中打开的效果如下：

模块的帮助文档：

NAME

sdxf

DESCRIPTION

SDXF - Stani's DXF

Python library to generate dxf drawings

Copyright www.stani.be

Version v1.2 (11/16/08)

License GPL

Homepage http://www.stani.be/python/sdxf

Library by Stani, whose website is now defunct.

Modifications by Kelly Farrell (http://www.kellbot.com)

to support LWPOLYLINE.

CLASSES

_Call(builtins.object)

Layer

LineType

Style

View

_Collection(_Call)

Block

Drawing

_Entity(_Call)

Arc

Circle

Face

Insert

Line

LineList

LwPolyLine

Point

Rectangle

Solid

Text

Mtext

class Arc(_Entity)

| Arc(center=(0, 0, 0), radius=1, startAngle=0.0, endAngle=90, **common)

|

| Arc, angles in degrees.

|

| Method resolution order:

| Arc

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, center=(0, 0, 0), radius=1, startAngle=0.0, endAngle=90, **common)

| Angles in degrees.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Block(_Collection)

| Block(name, layer='0', flag=0, base=(0, 0, 0), entities=[])

|

| Use list methods to add entities, eg append.

|

| Method resolution order:

| Block

| _Collection

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, name, layer='0', flag=0, base=(0, 0, 0), entities=[])

| Initialize self. See help(type(self)) for accurate signature.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Circle(_Entity)

| Circle(center=(0, 0, 0), radius=1, **common)

|

| Circle

|

| Method resolution order:

| Circle

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, center=(0, 0, 0), radius=1, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Drawing(_Collection)

| Drawing(insbase=(0.0, 0.0, 0.0), extmin=(0.0, 0.0), extmax=(0.0, 0.0), layers=[<sdxf.Layer object at 0x0000018154B3EC10>], linetypes=[<sdxf.LineType object at 0x0000018154B3EA30>], styles=[<sdxf.Style object at 0x0000018154B66E50>], blocks=[], views=[], entities=None, fileName='test.dxf')

|

| Dxf drawing. Use append or any other list methods to add objects.

|

| Method resolution order:

| Drawing

| _Collection

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, insbase=(0.0, 0.0, 0.0), extmin=(0.0, 0.0), extmax=(0.0, 0.0), layers=[<sdxf.Layer object at 0x0000018154B3EC10>], linetypes=[<sdxf.LineType object at 0x0000018154B3EA30>], styles=[<sdxf.Style object at 0x0000018154B66E50>], blocks=[], views=[], entities=None, fileName='test.dxf')

| Initialize self. See help(type(self)) for accurate signature.

|

| __str__(self)

| Returns drawing as dxf string.

|

| save(self)

|

| saveas(self, fileName)

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Face(_Entity)

| Face(points, **common)

|

| 3dface

|

| Method resolution order:

| Face

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, points, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Insert(_Entity)

| Insert(name, point=(0, 0, 0), xscale=None, yscale=None, zscale=None, cols=None, colspacing=None, rows=None, rowspacing=None, rotation=None, **common)

|

| Block instance.

|

| Method resolution order:

| Insert

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, name, point=(0, 0, 0), xscale=None, yscale=None, zscale=None, cols=None, colspacing=None, rows=None, rowspacing=None, rotation=None, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Layer(_Call)

| Layer(name='pydxf', color=7, lineType='continuous', flag=64)

|

| Layer

|

| Method resolution order:

| Layer

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, name='pydxf', color=7, lineType='continuous', flag=64)

| Initialize self. See help(type(self)) for accurate signature.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Line(_Entity)

| Line(points, **common)

|

| Line

|

| Method resolution order:

| Line

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, points, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class LineList(_Entity)

| LineList(points=[], closed=0, **common)

|

| Like polyline, but built of individual lines.

|

| Method resolution order:

| LineList

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, points=[], closed=0, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class LineType(_Call)

| LineType(name='continuous', description='Solid line', elements=[], flag=64)

|

| Custom linetype

|

| Method resolution order:

| LineType

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, name='continuous', description='Solid line', elements=[], flag=64)

| Initialize self. See help(type(self)) for accurate signature.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class LwPolyLine(_Entity)

| LwPolyLine(points, flag=0, width=None, **common)

|

| This is a LWPOLYLINE. I have no idea how it differs from a normal PolyLine

|

| Method resolution order:

| LwPolyLine

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, points, flag=0, width=None, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Mtext(Text)

| Mtext(text='', point=(0, 0, 0), width=250, spacingFactor=1.5, down=0, spacingWidth=None, **options)

|

| Surrogate for mtext, generates some Text instances.

|

| Method resolution order:

| Mtext

| Text

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, text='', point=(0, 0, 0), width=250, spacingFactor=1.5, down=0, spacingWidth=None, **options)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Point(_Entity)

| Point(points=None, **common)

|

| Colored solid fill.

|

| Method resolution order:

| Point

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, points=None, **common)

| None values will be omitted.

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

PolyLine = class LineList(_Entity)

| PolyLine(points=[], closed=0, **common)

|

| Like polyline, but built of individual lines.

|

| Method resolution order:

| LineList

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, points=[], closed=0, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Rectangle(_Entity)

| Rectangle(point=(0, 0, 0), width=1, height=1, solid=None, line=1, **common)

|

| Rectangle, creates lines.

|

| Method resolution order:

| Rectangle

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, point=(0, 0, 0), width=1, height=1, solid=None, line=1, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Solid(_Entity)

| Solid(points=None, **common)

|

| Colored solid fill.

|

| Method resolution order:

| Solid

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, points=None, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Style(_Call)

| Style(name='standard', flag=0, height=0, widthFactor=40, obliqueAngle=50, mirror=0, lastHeight=1, font='arial.ttf', bigFont='')

|

| Text style

|

| Method resolution order:

| Style

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, name='standard', flag=0, height=0, widthFactor=40, obliqueAngle=50, mirror=0, lastHeight=1, font='arial.ttf', bigFont='')

| Initialize self. See help(type(self)) for accurate signature.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class Text(_Entity)

| Text(text='', point=(0, 0, 0), alignment=None, flag=None, height=1, justifyhor=None, justifyver=None, rotation=None, obliqueAngle=None, style=None, xscale=None, **common)

|

| Single text line.

|

| Method resolution order:

| Text

| _Entity

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, text='', point=(0, 0, 0), alignment=None, flag=None, height=1, justifyhor=None, justifyver=None, rotation=None, obliqueAngle=None, style=None, xscale=None, **common)

| None values will be omitted.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

class View(_Call)

| View(name, flag=0, width=1, height=1, center=(0.5, 0.5), direction=(0, 0, 1), target=(0, 0, 0), lens=50, frontClipping=0, backClipping=0, twist=0, mode=0)

|

| Method resolution order:

| View

| _Call

| builtins.object

|

| Methods defined here:

|

| __init__(self, name, flag=0, width=1, height=1, center=(0.5, 0.5), direction=(0, 0, 1), target=(0, 0, 0), lens=50, frontClipping=0, backClipping=0, twist=0, mode=0)

| Initialize self. See help(type(self)) for accurate signature.

|

| __str__(self)

| Return str(self).

|

| ----------------------------------------------------------------------

| Methods inherited from _Call:

|

| __call__(self, **attrs)

| Returns a copy with modified attributes.

|

| copy(self)

| Returns a copy.

|

| ----------------------------------------------------------------------

| Data descriptors inherited from _Call:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

FUNCTIONS

ViewByWindow(name, leftBottom=(0, 0), rightTop=(1, 1), **options)

main()

#---test

DATA

ALIGNED = 3

ANONYMOUS = 1

AT_LEAST = 1

BASELINE = 0

BOTTOM = 1

BOTTOM_CENTER = 8

BOTTOM_LEFT = 7

BOTTOM_RIGHT = 9

BYBLOCK = 0

BYLAYER = 256

BY_STYLE = 5

CENTER = 1

CLOSED = 1

CLOSED_N = 32

CONTINOUS_LINETYPE_PATTERN = 128

CURVE_FIT = 2

EXACT = 2

EXTERNAL = 16

FIT = 5

LEFT = 0

LEFT_RIGHT = 1

MIDDLE = 2

MIDDLE_CENTER = 5

MIDDLE_LEFT = 4

MIDDLE_RIGHT = 6

NON_CONSTANT_ATTRIBUTES = 2

POLYFACE_MESH = 64

POLYGON_MESH = 16

POLYLINE_3D = 8

REFERENCED = 64

RESOLVED = 32

RIGHT = 2

SPLINE_FIT = 4

TOP = 3

TOP_BOTTOM = 3

TOP_CENTER = 2

TOP_LEFT = 1

TOP_RIGHT = 3

XREF = 4

XREF_OVERLAY = 8

__license__ = 'GPL'

__url__ = 'http://www.stani.be/python/sdxf'

VERSION

v1.2 (11/16/08)

AUTHOR