Constants
=========

.. currentmodule:: gi.repository.Graphene



.. data:: PI
   :value: 3.141593

   







.. data:: PI_2
   :value: 1.570796

   







.. data:: VEC2_LEN
   :value: 2

   Evaluates to the number of components of a :obj:`~gi.repository.Graphene.Vec2`\.

   This symbol is useful when declaring a C array of floating
   point values to be used with :func:`~gi.repository.Graphene.Vec2.init_from_float` and
   :func:`~gi.repository.Graphene.Vec2.to_float`, e.g.


   .. code-block::
       :dedent:

         float v[GRAPHENE_VEC2_LEN];

         // vec is defined elsewhere
         graphene_vec2_to_float (&vec, v);

         for (int i = 0; i < GRAPHENE_VEC2_LEN; i++)
           fprintf (stdout, "component %d: %g\n", i, v[i]);







.. data:: VEC3_LEN
   :value: 3

   Evaluates to the number of components of a :obj:`~gi.repository.Graphene.Vec3`\.

   This symbol is useful when declaring a C array of floating
   point values to be used with :func:`~gi.repository.Graphene.Vec3.init_from_float` and
   :func:`~gi.repository.Graphene.Vec3.to_float`, e.g.


   .. code-block::
       :dedent:

         float v[GRAPHENE_VEC3_LEN];

         // vec is defined elsewhere
         graphene_vec3_to_float (&vec, v);

         for (int i = 0; i < GRAPHENE_VEC2_LEN; i++)
           fprintf (stdout, "component %d: %g\n", i, v[i]);







.. data:: VEC4_LEN
   :value: 4

   Evaluates to the number of components of a :obj:`~gi.repository.Graphene.Vec4`\.

   This symbol is useful when declaring a C array of floating
   point values to be used with :func:`~gi.repository.Graphene.Vec4.init_from_float` and
   :func:`~gi.repository.Graphene.Vec4.to_float`, e.g.


   .. code-block::
       :dedent:

         float v[GRAPHENE_VEC4_LEN];

         // vec is defined elsewhere
         graphene_vec4_to_float (&vec, v);

         for (int i = 0; i < GRAPHENE_VEC4_LEN; i++)
           fprintf (stdout, "component %d: %g\n", i, v[i]);