Macro Draw Parametric 2D Function
Beschreibung |
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Zeichnet 2-dimensionale, parametrische und optional polare Gleichungen. Versionsmakro : 1.0 Datum der letzten Änderung : 2012-08-30 Autor: T4b |
Autor |
T4b |
Herunterladen |
None |
Links |
Makros Rezepte Wie installiere ich Makros So passen Sie Symbolleisten an |
Macro-Version |
1.0 |
Datum der letzten Änderung |
2012-08-30 |
FreeCAD-Version(s) |
None |
Standardverknüpfung |
None |
Siehe auch |
None |
Beschreibung
Zeichnet 2-dimensionale, parametrische und optional polare Gleichungen.
DrawParametric2DFunction
Limitations
Still has some bugs and misses some features. Documentation is in the docstrings.
Use
Type :
Example usage:
draw2Dfunction(xFunction="0.5*n", yFunction="-0.75*n", n=0, nd=-math.pi, step=50, pol=1)
Script
Macro_drawParametric2DFunction.FCMacro
import FreeCAD, FreeCADGui, Part
import math
def evalFunction(suppliedFunction, n):
"""This function uses eval to evaluate suppliedFunction.
It does in no way check whether suppliedFunction is evil, thus it is itself evil!
"""
return eval(suppliedFunction)
def draw2Dfunction(xFunction="n", yFunction="n", n=-5, nd=10, step=10, z=0, pol=0):
"""Draws 2-dimensional mathemathical functions
The function is drawn for n's between n and n+nd, in steps of 1/step, on the z-coordinate z.
Equations for x and y can be given (xFunction and yFunction arguments), they default to n.
If pol=1 then x is interpreted as r and y is interpreted as t.
"""
nStart=n
while math.fabs(n-nd)-1.0/step>0:
print "n: " + str(n)
x=evalFunction(xFunction, n)
y=evalFunction(yFunction, n)
nNext=n+math.copysign(1,nd-n)/step
print "nNext: " + str(nNext)
xNext=evalFunction(xFunction, nNext)
yNext=evalFunction(yFunction, nNext)
if pol==0:
nextSeg=(x,y,z),(xNext,yNext,z)
else:
nextSeg=(x*math.cos(y),x*math.sin(y),z),(xNext*math.cos(yNext),xNext*math.sin(yNext),z)
print "nextSeg: " + str(nextSeg)
nomme=Part.makeLine(*nextSeg)
if n==nStart:
WWire=Part.Wire([nomme])
else:
WWire=Part.Wire([WWire,nomme])
n=nNext
Part.show(WWire)
#Example usage:
draw2Dfunction(xFunction="0.5*n", yFunction="-0.75*n", n=0, nd=-math.pi, step=50, pol=1)