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Camera.h
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#pragma once
// Std. Includes
#include <vector>
// GL Includes
#include <GL/glew.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
// Defines several possible options for camera movement. Used as abstraction to stay away from window-system specific input methods
enum class Camera_Movement {
FORWARD,
BACKWARD,
LEFT,
RIGHT
};
// Default camera values
const GLfloat YAW = -90.0f;
const GLfloat PITCH = 0.0f;
const GLfloat SPEED = 7.0f;
const GLfloat SENSITIVTY = 0.05f;
const GLfloat ZOOM = 60.0f;
// An abstract camera class that processes input and calculates the corresponding Eular Angles, Vectors and Matrices for use in OpenGL
class Camera
{
public:
GLfloat getZoom() const {
return Zoom;
}
glm::vec3 getPosition() const {
return Position;
}
Camera(glm::vec3 position = glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3 up = glm::vec3(0.0f, 1.0f, 0.0f), GLfloat yaw = YAW, GLfloat pitch = PITCH) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVTY), Zoom(ZOOM)
{
this->Position = position;
this->WorldUp = up;
this->Yaw = yaw;
this->Pitch = pitch;
this->updateCameraVectors();
}
Camera(GLfloat posX, GLfloat posY, GLfloat posZ, GLfloat upX, GLfloat upY, GLfloat upZ, GLfloat yaw, GLfloat pitch) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVTY), Zoom(ZOOM)
{
this->Position = glm::vec3(posX, posY, posZ);
this->WorldUp = glm::vec3(upX, upY, upZ);
this->Yaw = yaw;
this->Pitch = pitch;
this->updateCameraVectors();
}
glm::mat4 GetViewMatrix();
void ProcessKeyboard(Camera_Movement direction, GLfloat deltaTime);
void ProcessMouseMovement(GLfloat xoffset, GLfloat yoffset, GLboolean constrainPitch = true);
void ProcessMouseScroll(GLfloat yoffset);
private:
void updateCameraVectors();
// Camera Attributes
glm::vec3 Position;
glm::vec3 Front;
glm::vec3 Up;
glm::vec3 Right;
glm::vec3 WorldUp;
// Eular Angles
GLfloat Yaw;
GLfloat Pitch;
// Camera options
GLfloat MovementSpeed;
GLfloat MouseSensitivity;
GLfloat Zoom;
};