warp.dot
========

.. currentmodule:: warp._src.lang

.. function:: dot(a: Vector[Scalar, Any], b: Vector[Scalar, Any]) -> Scalar

   .. wp-function-tags::
      :kernel: true
      :python: true
      :differentiable: true

   Compute the dot product.

.. function:: dot(a: Quaternion[Float], b: Quaternion[Float]) -> Float
   :noindex:

   .. wp-function-tags::
      :kernel: true
      :python: true
      :differentiable: true

   Return the dot product of the four components of ``a`` and ``b``.
   
   :param a: First quaternion.
   :param b: Second quaternion.
   
   :returns: The scalar dot product. For unit quaternions, ``abs(dot(a, b))`` is the cosine of half the
             angle of the rotation from ``a`` to ``b``, and a negative value means that ``-b`` is closer to
             ``a`` than ``b`` is.