summaryrefslogtreecommitdiff
path: root/src/cython/doc/tangential_complex_user.rst
diff options
context:
space:
mode:
Diffstat (limited to 'src/cython/doc/tangential_complex_user.rst')
-rw-r--r--src/cython/doc/tangential_complex_user.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/cython/doc/tangential_complex_user.rst b/src/cython/doc/tangential_complex_user.rst
index 7b6c9e79..2679528c 100644
--- a/src/cython/doc/tangential_complex_user.rst
+++ b/src/cython/doc/tangential_complex_user.rst
@@ -26,6 +26,7 @@ example, with :math:`k = 1` and :math:`d = 2`. The input data is 4 points
.. figure:: img/tc_example_01.png
:alt: The input
:figclass: align-center
+
The input
For each point :math:`p`, estimate its tangent subspace :math:`T_p` (e.g.
@@ -34,8 +35,10 @@ using PCA).
.. figure:: img/tc_example_02.png
:alt: The estimated normals
:figclass: align-center
+
The estimated normals
+
Let us add the Voronoi diagram of the points in orange. For each point
:math:`p`, construct its star in the Delaunay triangulation of :math:`P`
restricted to :math:`T_p`.
@@ -43,6 +46,7 @@ restricted to :math:`T_p`.
.. figure:: img/tc_example_03.png
:alt: The Voronoi diagram
:figclass: align-center
+
The Voronoi diagram
The Tangential Delaunay complex is the union of those stars.
@@ -62,6 +66,7 @@ Let us take the same example.
.. figure:: img/tc_example_07_before.png
:alt: Before
:figclass: align-center
+
Before
Let us slightly move the tangent subspace :math:`T_q`
@@ -69,6 +74,7 @@ Let us slightly move the tangent subspace :math:`T_q`
.. figure:: img/tc_example_07_after.png
:alt: After
:figclass: align-center
+
After
Now, the star of :math:`Q` contains :math:`QP`, but the star of :math:`P` does
@@ -77,6 +83,7 @@ not contain :math:`QP`. We have an inconsistency.
.. figure:: img/tc_example_08.png
:alt: After
:figclass: align-center
+
After
One way to solve inconsistencies is to randomly perturb the positions of the