Method TickCamera

Rtxpt/SampleGame/GameScene.cpp:419–477

}

void GameScene::TickCamera(float deltaTime, donut::app::FirstPersonCamera & renderCamera)
{
    // in case we're switching from scene camera (renderCamera) to game camera and back, save/restore scene camera
    if (!m_wasGameCameraActive && CameraActive())
    {
        m_sceneCameraLastPos = renderCamera.GetPosition();
        m_sceneCameraLastDir = renderCamera.GetDir();
        m_sceneCameraLastUp  = renderCamera.GetUp();
    }
    if (m_wasGameCameraActive && !CameraActive())
    {
        renderCamera.LookTo(m_sceneCameraLastPos, m_sceneCameraLastDir, m_sceneCameraLastUp);
    }
    m_wasGameCameraActive = CameraActive();

    if (CameraActive())
    {
        // Allow game camera to move in its own reference frame - this should be optional as some props might like to have control of it
        m_gameCamera.Animate(deltaTime);

        // Move game camera into it's parent (attached) prop's reference frame and apply to global renderCamera
        {
            auto attachedProp = m_gameCameraAttached.lock();
            affine3 transform = affine3::identity();
            if (attachedProp != nullptr)
            {
                // transform = attachedObject->GetRootNode()->GetLocalToWorldTransformFloat(); // we can't do this because these have not yet been updated
                dm::daffine3 transformD = dm::scaling(attachedProp->GetNode()->GetScaling());
                transformD *= attachedProp->GetNode()->GetRotation().toAffine();
                transformD *= dm::translation(attachedProp->GetNode()->GetTranslation());
                transform = dm::affine3(transformD);
            }

            renderCamera.LookTo( transform.transformPoint(m_gameCamera.GetPosition()), transform.transformVector(m_gameCamera.GetDir()), transform.transformVector(m_gameCamera.GetUp()));
        }
    }

    m_lastRenderCameraPose.SetTransformFromCamera(renderCamera.GetPosition(), renderCamera.GetDir(), renderCamera.GetUp());

    //if (!m_active)
    //    return;
    
    if (m_camRecEnabled && IsActive())
    {
        m_camRecTimeToNextKeyframe = dm::clamp(m_camRecTimeToNextKeyframe-deltaTime, -m_camRecKeyframeStep, m_camRecKeyframeStep);

        if (m_camRecTimeToNextKeyframe <= 0)
        {
            game::Pose pose;
            pose.SetTransformFromCamera(renderCamera.GetPosition(), renderCamera.GetDir(), renderCamera.GetUp());
            pose.Scaling = { 1,1,1 };
            pose.KeyTime = m_gameTime;

            m_recordedCameraPoses.push_back(pose);

            m_camRecTimeToNextKeyframe += m_camRecKeyframeStep;
        }
    }