Opengl Free cam (from Learnopengl) to 3rd cam - c++

Question

I'm studying opengl and following the tutorials on the learnopengl website (https://learnopengl.com/)
Could someone please help me convert this camera from the learnopengl tutorial, from free camera to third person ?
I've tried to put the values ​​of the object (character), but I can't make the camera rotate around the player. Only the object walks in front of the camera, if I turn to the side, the object turns along, look like FPS camera and the object (character) being the weapon.
The code to walk (keyboard):
void processKeyboard(Camera_Movement direction, float deltaTime)
{
frontY = Front.y;//para tirar o freeCamera
if (cameraStyle == FPS_CAMERA) {
Front.y = 0;
}
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;
Front.y = frontY;
}
Mouse event:
void processMouseMovement(float xoffset, float yoffset, GLboolean constrainPitch = true)
{
xoffset *= MouseSensitivity;
yoffset *= MouseSensitivity;
Yaw += xoffset;
Pitch += yoffset;
// Make sure that when pitch is out of bounds, screen doesn't get flipped
if (constrainPitch)
{
if (Pitch > 89.0f)
Pitch = 89.0f;
if (Pitch < -89.0f)
Pitch = -89.0f;
}
// Update Front, Right and Up Vectors using the updated Euler angles
updateCameraVectors();
}
To update values:
void updateCameraVectors()
{
// Calculate the new Front vector
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);
// Also re-calculate the Right and Up vector
Right = glm::normalize(glm::cross(Front, WorldUp)); // Normalize the vectors, because their length gets closer to 0 the more you look up or down which results in slower movement.
Up = glm::normalize(glm::cross(Right, Front));
}
And to use:
glm::vec3 playerPosition = glm::vec3(Position.x, terrainY, Position.z) + glm::vec3(1, -0.06f, 1)
has anyone been through this and who could help me?
Thank you

Answer 1

Here is the code I use to create a third person camera:
float pitch = -Pitch;
// I use a 90.0f offset
// but you can play around with that value to suit your needs
float yaw = Yaw - 90.0f;
// constrain pitch so you don't look from below ground level
if (pitch < 0.0) {
pitch = 0.0;
}
// algorithm from ThinMatrix video on third person cameras
float distance = 20.0f;
float x = distance * cos(glm::radians(pitch)) * sin(radians(-yaw));
float y = distance * sin(glm::radians(pitch));
float z = distance * cos(glm::radians(pitch)) * cos(glm::radians(yaw));
glm::vec3 tpCamPos = playerPosition + vec3(-x, y, -z);