Camera.cpp

#include "include/Camera.h"
#include <cmath>

Camera::Camera(glm::vec3 position, glm::vec3 up, float yaw, float pitch) : Front(glm::vec3(0.0f, -0.3f, -1.0f)), MovementSpeed(1000.0f), MouseSensitivity(0.1f) {
    Position = position;
    WorldUp = up;
    Yaw = yaw;
    Pitch = pitch;
    updateCameraVectors();
}

glm::mat4 Camera::GetViewMatrix() {
    return glm::lookAt(Position, Position + Front, Up);
}

void Camera::ProcessKeyboard(Camera_Movement direction, float deltaTime) {
    float velocity = MovementSpeed * deltaTime;
    if (direction == FORWARD) Position += Front * velocity;
    if (direction == BACKWARD) Position -= Front * velocity;
    if (direction == LEFT) Position -= Right * velocity;
    if (direction == RIGHT) Position += Right * velocity;
}

void Camera::ProcessMouseMovement(float xoffset, float yoffset, GLboolean constrainPitch) {
    xoffset *= MouseSensitivity;
    yoffset *= MouseSensitivity;

    Yaw += xoffset;
    Pitch += yoffset;

    if (constrainPitch) {
        if (Pitch > 89.0f) Pitch = 89.0f;
        if (Pitch < -89.0f) Pitch = -89.0f;
    }

    updateCameraVectors();
}

void Camera::updateCameraVectors() {
    
    glm::vec3 front;
    front.x = cos(glm::radians(Yaw)) * cos(glm::radians(Pitch));
    front.y = sin(glm::radians(Pitch));
    front.z = sin(glm::radians(Yaw)) * cos(glm::radians(Pitch));
    
    Front = glm::normalize(front);
    Right = glm::normalize(glm::cross(Front, WorldUp));
    Up = glm::normalize(glm::cross(Right, Front));
}