Changeset 7855:0fed8c25284d

Timestamp:

12/14/07 17:55:57 (5 years ago)

Author:

Robert Bradshaw <robertwb@…>

Branch:

default

Message:

Initial triangulation bug in ParametricSurface?

Location:

sage/plot/plot3d

Files:

• all.py (modified) (1 diff)
• parametric_surface.pyx (modified) (2 diffs)

sage/plot/plot3d/all.py

@@ -1 +1 @@
 from shapes import Box, ColorCube, Cone, Cylinder, Line, Arrow, Sphere, Torus, Text as Text3D
+from parametric_surface import ParametricSurface, MobiusStrip
 from plot3d import plot3d, axes as axes3d
 from platonic import Tetrahedron, Cube, Octahedron, Dodecahedron, IndexFaceSet, Icosahedron

sage/plot/plot3d/parametric_surface.pyx

@@ -68 +68 @@
 cdef class ParametricSurface(IndexFaceSet):
 
+    """
+    EXAMPLES: 
+        sage: from sage.plot.plot3d.parametric_surface import ParametricSurface
+        sage: def f(x,y): return cos(x)*sin(y), sin(x)*sin(y), cos(y)+log(tan(y/2))+0.2*x
+        sage: S = ParametricSurface(f, (srange(0,12.4,0.1), srange(0.1,2,0.1)))
+        sage: show(S)
+        
+        sage: len(S.face_list())
+        2214
+    """
+
     def __init__(self, f=None, domain=None, **kwds):
         self.f = f
@@ -130 +141 @@
         urange = [float(u) for u in urange]
         vrange = [float(v) for v in vrange]
-        if self.render_grid == (urange, vrange):
+        if self.render_grid == (urange, vrange) and self.fcount != 0:
+            # Already triangulated at on this grid. 
             return