From a86bcf92ae109bdfcac6a231977cb88ef74eced3 Mon Sep 17 00:00:00 2001
From: Onur Rauf Bingol <orbingol@gmail.com>
Date: Fri, 31 Aug 2018 23:00:33 -0500
Subject: [PATCH] Add torodial surface example

---
 surface/ex_torus.cptw |  9 ++++++++
 surface/ex_torus.py   | 49 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 surface/ex_torus.cptw
 create mode 100644 surface/ex_torus.py

diff --git a/surface/ex_torus.cptw b/surface/ex_torus.cptw
new file mode 100644
index 0000000..f006f02
--- /dev/null
+++ b/surface/ex_torus.cptw
@@ -0,0 +1,9 @@
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+-88.375,70.7,0.0,0.707;-88.375,70.7,88.375,0.707;0.0,70.7,88.375,0.707;88.375,70.7,88.375,0.707;88.375,70.7,0.0,0.707;88.375,70.7,-88.375,0.707;0.0,70.7,-88.375,0.707;-88.375,70.7,-88.375,0.707;-88.375,70.7,0.0,0.707
+-225.0,100.0,0.0,1.0;-225.0,100.0,225.0,1.0;0.0,100.0,225.0,1.0;225.0,100.0,225.0,1.0;225.0,100.0,0.0,1.0;225.0,100.0,-225.0,1.0;0.0,100.0,-225.0,1.0;-225.0,100.0,-225.0,1.0;-225.0,100.0,0.0,1.0
+-229.775,70.7,0.0,0.707;-229.775,70.7,229.775,0.707;0.0,70.7,229.775,0.707;229.775,70.7,229.775,0.707;229.775,70.7,0.0,0.707;229.775,70.7,-229.775,0.707;0.0,70.7,-229.775,0.707;-229.775,70.7,-229.775,0.707;-229.775,70.7,0.0,0.707
+-325.0,0.0,0.0,1.0;-325.0,0.0,325.0,1.0;0.0,0.0,325.0,1.0;325.0,0.0,325.0,1.0;325.0,0.0,0.0,1.0;325.0,0.0,-325.0,1.0;0.0,0.0,-325.0,1.0;-325.0,0.0,-325.0,1.0;-325.0,0.0,0.0,1.0
+-229.775,-70.7,0.0,0.707;-229.775,-70.7,229.775,0.707;0.0,-70.7,229.775,0.707;229.775,-70.7,229.775,0.707;229.775,-70.7,0.0,0.707;229.775,-70.7,-229.775,0.707;0.0,-70.7,-229.775,0.707;-229.775,-70.7,-229.775,0.707;-229.775,-70.7,0.0,0.707
+-225.0,-100.0,0.0,1.0;-225.0,-100.0,225.0,1.0;0.0,-100.0,225.0,1.0;225.0,-100.0,225.0,1.0;225.0,-100.0,0.0,1.0;225.0,-100.0,-225.0,1.0;0.0,-100.0,-225.0,1.0;-225.0,-100.0,-225.0,1.0;-225.0,-100.0,0.0,1.0
+-88.375,-70.7,0.0,0.707;-88.375,-70.7,88.375,0.707;0.0,-70.7,88.375,0.707;88.375,-70.7,88.375,0.707;88.375,-70.7,0.0,0.707;88.375,-70.7,-88.375,0.707;0.0,-70.7,-88.375,0.707;-88.375,-70.7,-88.375,0.707;-88.375,-70.7,0.0,0.707
+-125.0,0.0,0.0,1.0;-125.0,0.0,125.0,1.0;0.0,0.0,125.0,1.0;125.0,0.0,125.0,1.0;125.0,0.0,0.0,1.0;125.0,0.0,-125.0,1.0;0.0,0.0,-125.0,1.0;-125.0,0.0,-125.0,1.0;-125.0,0.0,0.0,1.0
diff --git a/surface/ex_torus.py b/surface/ex_torus.py
new file mode 100644
index 0000000..637d706
--- /dev/null
+++ b/surface/ex_torus.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+    Examples for the NURBS-Python Package
+    Released under MIT License
+    Developed by Onur Rauf Bingol (c) 2018
+
+    Toroidal surface is contributed by Harshil Shah (@harshilsofeshah)
+"""
+
+import os
+from geomdl import NURBS
+from geomdl import exchange
+from geomdl.visualization import VisMPL
+
+
+# Fix file path
+os.chdir(os.path.dirname(os.path.realpath(__file__)))
+
+# Create a NURBS surface instance
+surf = NURBS.Surface()
+
+# Set degress
+surf.degree_u = 2
+surf.degree_v = 2
+
+# Set control points
+surf.set_ctrlpts(*exchange.import_txt("ex_torus.cptw", two_dimensional=True))
+
+# Set knot vectors
+surf.knotvector_u = [0, 0, 0, 0.25, 0.25, 0.5, 0.5, 0.75, 0.75, 1, 1, 1]
+surf.knotvector_v = [0, 0, 0, 0.25, 0.25, 0.5, 0.5, 0.75, 0.75, 1, 1, 1]
+
+# Set sample size and evaluate surface
+surf.sample_size = 25
+surf.evaluate()
+
+# Import colormaps
+from matplotlib import cm
+
+# Plot the surface
+vis_config = VisMPL.VisConfig(ctrlpts=True, axes=True, legend=False)
+vis_comp = VisMPL.VisSurfTriangle(vis_config)
+surf.vis = vis_comp
+surf.render(colormap=cm.coolwarm)
+
+# Good to have something here to put a breakpoint
+pass