#ifndef FOLLOWCAMERA_H
#define FOLLOWCAMERA_H

#include "planarCamera.h"

class FollowCamera : public PlanarCamera {
public:
    FollowCamera(glm::vec3 position = glm::vec3(0.0f, 0.0f, 3.0f))
        : PlanarCamera(position) {}

    void Follow(glm::vec3 targetPosition, glm::vec3 frontProjection, glm::vec3 targetUp) {
        float followDistance = 4.0f; // 跟随距离
        float followHeight = 2.0f;   // 跟随高度

        // 计算新的位置
        glm::vec3 backOffset = -frontProjection * followDistance;
        glm::vec3 upOffset = glm::vec3(0.0f, followHeight, 0.0f);
        Position = targetPosition + backOffset + upOffset;

        // 计算新的方向
        glm::vec3 direction = glm::normalize(frontProjection);
        Front = direction;

        // 保持摄像机的上方向与目标摄像机一致
        Up = targetUp;

        updateCameraVectors();
    }
};

#endif // FOLLOWCAMERA_H