Macro Draw Parametric 2D Function/cs: Difference between revisions

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{{Macro/cs
<div class="mw-translate-fuzzy">
|Name=Macro Draw Parametric 2D Function
{{Macro/cs|Icon=Text-x-python|Name=Macro Draw Parametric 2D Function|Name/cs=Vykresli 2D funkci parametrická|Description=Vykreslí 2-dimenzionální, parametrickou a volitelně polární rovnici.|Author=T4b|Version=1.0|Date=2012-08-30}}
|Translate=Vykresli 2D funkci parametrická|Description=Vykreslí 2-dimenzionální, parametrickou a volitelně polární rovnici.
</div>
|Author=T4b
|Version=1.0
|Date=2012-08-30
}}


==Description==
==Description==

Revision as of 19:39, 16 December 2018

Other languages:

Vykresli 2D funkci parametrická

Popis
Vykreslí 2-dimenzionální, parametrickou a volitelně polární rovnici.

Version macro : 1.0
Date last modification : 2012-08-30
Autor: T4b
Autor
T4b
Download
None
Odkazy
Verze
1.0
Datum poslední úpravy
2012-08-30
Verze FreeCAD
None
Výchozí zástupce
None
Viz též
None

Description

Zatím má nějaké chyby a chybí některé vlastnosti. Dokumentace je v komenářích zdrojoového kódu.

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)