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--- ws1415:projekte_im_wintersemester_2014_15:nuetzliche_programmschnipsel [2014/11/27 10:22]
stefanborn [Dreiecke zeichnen]
+++ ws1415:projekte_im_wintersemester_2014_15:nuetzliche_programmschnipsel [2016/05/10 14:46] (aktuell)
@@ Zeile 1: / Zeile 1: @@
 ===== Nützliche Programmschnipsel =====
+==== Test für Objektorientierte Dreiecke ====
+<code Python>
+import numpy as np
+import matplotlib.pyplot as plt
+from mpl_toolkits.mplot3d import Axes3D
+import matplotlib.tri as mtri
+from scipy.spatial import Delaunay
+xinput=[1,2,3,4]
+yinput=[1,2,3,4]
+z=[]
+x=[]
+y=[]
+def do(xinput,yinput):
+	xlange=len(xinput)
+	ylange=len(yinput)
+	for i in range((xlange*ylange)):
+		z.append(np.random.uniform(1,3,size=None))
+	for i in range(xlange):
+		for ii in range(xlange):
+			x.append(i)
+	for i in range(ylange):
+		for ii in range(ylange):
+			y.append(ii)
+do(xinput,yinput)
+Array=np.array([x,y]).T
+def triang(x,y,z):
+	global tri
+	tri = Delaunay(Array)
+	fig = plt.figure()
+	ax = fig.add_subplot(1, 1, 1, projection='3d')
+	ax.plot_trisurf(x, y, z, triangles=tri.simplices, cmap=plt.cm.Spectral)
+triang(x,y,z)
+dreiecke=[]
+def eckpunkte(simplices):
+	for bla in range(len(simplices)):
+		dreieck=[]
+		sxyz=tri.simplices[bla]
+		#x
+		sx=sxyz[0]
+		ssx=Array[sx]
+		dreieck.append(ssx)
+		#y
+		sy=sxyz[1]
+		ssy=Array[sy]
+		dreieck.append(ssy)
+		#z
+		sz=sxyz[2]
+		ssz=Array[sz]
+		dreieck.append(ssz)
+		dreiecke.append(dreieck)
+eckpunkte(tri.simplices)
+print dreiecke
+plt.show()
+</code>
+==== Funktionierende Triangulierung ====
+<code Python>
+def Show(NAME):
+	import numpy as np
+	import matplotlib.pyplot as plt
+	from mpl_toolkits.mplot3d import Axes3D
+	import matplotlib.tri as mtri
+	from scipy.spatial import Delaunay
+	rangey=[]
+	rangex=[]
+	z=[]
+	myArray  = np.loadtxt(NAME)
+	zeilen,spalten=myArray.shape
+	for i in range(zeilen):
+		for ii in range(zeilen):
+			rangex.append(i)
+	for i in range(spalten):
+		for i in range(spalten):
+			rangey.append(i)
+	reader=open(NAME,'r')
+	z1=reader.read()
+	reader.close()
+	z1=z1.replace("\n","")
+	z1=(z1.split())
+	for word in z1:
+		z.append(word)
+	z=map(int,z)
+	tri = Delaunay(np.array([rangex,rangey]).T)
+	fig = plt.figure()
+	ax = fig.add_subplot(1, 1, 1, projection='3d')
+	ax.plot_trisurf(rangex, rangey, z, triangles=tri.simplices, cmap=plt.cm.BrBG)
+	plt.show()
+	print len(tri.simplices)
+if __name__ == '__main__':
+	Show("montblanc1.asc")
+</code>
 ==== 3d-Punkte zeichnen  ====
@@ Zeile 27: / Zeile 143: @@
 plt.show()
 </code>
-==== Noch eine Variante ====
+==== 3d-Dreiecke zeichnen ====
 <code python>
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
-#
-#  delaunay.py
-#
-#  Copyright 2014 Stefan Born <born@math.tu-berlin.de>
-#
-#  This program is free software; you can redistribute it and/or modify
-#  it under the terms of the GNU General Public License as published by
-#  the Free Software Foundation; either version 2 of the License, or
-#  (at your option) any later version.
-#
-#  This program is distributed in the hope that it will be useful,
-#  but WITHOUT ANY WARRANTY; without even the implied warranty of
-#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#  GNU General Public License for more details.
-#
-#  You should have received a copy of the GNU General Public License
-#  along with this program; if not, write to the Free Software
-#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
-#  MA 02110-1301, USA.
-#
-#
 import numpy as np
+from scipy.spatial import Delaunay
+import mpl_toolkits.mplot3d as mplot3d
+import matplotlib.colors as colors
+import pylab as pl
 ###  erzeuge ein Gitter von x,y-Werten mit zugehörigen z-Werten
@@ Zeile 70: / Zeile 169: @@
 ### Berechne Delaunay-Triangulierung des Gitters
-from scipy.spatial import Delaunay
 tri = Delaunay(points2d)
@@ Zeile 82: / Zeile 181: @@
 ###  mplot3d.art3d.Poly3DCollection(...) werden
-import mpl_toolkits.mplot3d as mplot3d
-import matplotlib.colors as colors
-import pylab as pl
-import numpy as np
 ax = mplot3d.Axes3D(pl.figure())

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