Действие с камерой, OpenGL

// Transform.cpp: implementation of the Transform class.
 
 
#include "Transform.h"
 
//Please implement the following functions:
 
// Helper rotation function.  
mat3 Transform::rotate(const float degrees, const vec3& axis) {
  // YOUR CODE FOR HW1 HERE
    
  // You will change this return call
  return mat3();
}
 
// Transforms the camera left around the "crystal ball" interface
void Transform::left(float degrees, vec3& eye, vec3& up) {
  // YOUR CODE FOR HW1 HERE
}
 
// Transforms the camera up around the "crystal ball" interface
void Transform::up(float degrees, vec3& eye, vec3& up) {
  // YOUR CODE FOR HW1 HERE 
}
 
// Your implementation of the glm::lookAt matrix
mat4 Transform::lookAt(vec3 eye, vec3 up) {
  // YOUR CODE FOR HW1 HERE
 
  // You will change this return call
  return mat4();
}
 
Transform::Transform()
{
 
}
 
Transform::~Transform()
{
 
}

// Transform header file to define the interface. 
// The class is all static for simplicity
// You need to implement left, up and lookAt
// Rotate is a helper function
 
// Include the helper glm library, including matrix transform extensions
 
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
 
// glm provides vector, matrix classes like glsl
// Typedefs to make code more readable 
 
typedef glm::mat3 mat3 ;
typedef glm::mat4 mat4 ; 
typedef glm::vec3 vec3 ; 
typedef glm::vec4 vec4 ; 
const float pi = 3.14159265 ; // For portability across platforms
 
 
class Transform  
{
public:
    Transform();
    virtual ~Transform();
    static void left(float degrees, vec3& eye, vec3& up);
    static void up(float degrees, vec3& eye, vec3& up);
    static mat4 lookAt(vec3 eye, vec3 up);
    static mat3 rotate(const float degrees, const vec3& axis) ;
};