FrameRecorder.hpp

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#pragma once
 
#include <cstdint>
#include <glm/glm.hpp>
#include <string>
#include <vector>
 
struct FrameState
{
    uint64_t frameNumber = 0;
    double timestamp = 0.0; 
    int tickCount = 0;      
 
    // Raw physics state
    glm::vec3 physPos{0.0f}; 
    glm::vec3 physVel{0.0f}; 
 
    // Raw input orientation
    float yaw = 0.0f;   
    float pitch = 0.0f; 
 
    // What was sent to Renderer::drawFrame
    glm::vec3 renderEye{0.0f};
    float renderYaw = 0.0f;
    float renderPitch = 0.0f;
 
    // Screen-space (pixels) of world objects -- jitter is visible here
    glm::vec2 cubeScreen{0.0f};  
    glm::vec2 modelScreen{0.0f}; 
 
    std::string screenshotPath;  
};
 
class FrameRecorder
{
public:
    void startRecording(const std::string& baseDir);
 
    void stopRecording();
 
    void recordFrame(const FrameState& state);
 
    bool isRecording() const { return recording_; }
    const std::string& sessionDir() const { return sessionDir_; }
    double startTimeSecs() const { return startTime_; }
 
private:
    bool recording_ = false;
    std::string sessionDir_;
    double startTime_ = 0.0; 
    std::vector<FrameState> frames_;
 
    void writeCSV() const;
};