Function get1f

tutorials/common/texture/texture2d.h:39–44

! helper function that returns the sampled value for the first channel of the given texture Right now, this function always asks the texture for all four channels, and then discards all but one; later implementations may have specialized 'get1f' methods with the texture \note self may NOT be nullptr! */

  \note self may NOT be nullptr!
*/
inline float get1f(const Texture2D *self,
                   const Vec2f where)
{
  Vec4f ret = self->get(self, where);
  return ret.x;
}

/*! helper function that returns the sampled value for the first three
  channels of the given texture