Refactor math functions, add unit tests

After some testing, I decided to ditch the DirectX approach of writing
math functions.

Additionally, I added unit tests (with reference wxMaxima calculations)
for most math functions and fixed several bugs along the way.

1 files changed, 0 insertions, 0 deletions

diff --git a/test/reference/point4f.wxmx b/test/reference/point4f.wxmx
new file mode 100644
index 0000000..10af820
--- /dev/null
+++ b/test/reference/point4f.wxmx