Add single wheel tire model
This lets us play with the tire math and see how it works in various
situations to see if we got it right.
Change-Id: I7b6f3add85d4be6c894532b71249df59281a8db3
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/tools/python/requirements.txt b/tools/python/requirements.txt
index 0a5f24a..e758cf5 100644
--- a/tools/python/requirements.txt
+++ b/tools/python/requirements.txt
@@ -14,6 +14,7 @@
shapely
validators
yapf
+sympy
# TODO(phil): Migrate to absl-py. These are abandoned as far as I can tell.
python-gflags