### - o -

- operator!=() : glm::gtx::comparison
- operator==() : glm::gtx::comparison
- orientate2() : glm::gtx::euler_angles
- orientate3() : glm::gtx::euler_angles
- orientate4() : glm::gtx::euler_angles
- orientation() : glm::gtx::rotate_vector
- orientedAngle() : glm::gtx::vector_angle
- orientedAngleFromRef() : glm::gtx::vector_angle
- ortho() : glm::gtc::matrix_projection
- orthonormalize() : glm::gtx::orthonormalize
- outerProduct() : glm::core::function::matrix