load cameras from json question

[tigrazone]

Hello.
I'm trying to implement import of cameras from vk_gltf_viewer(json) to my fork of RTXGI.
I have load from json to variables cameraPos, cameraTarget, cameraUp.

  auto camera = std::make_shared<PerspectiveCamera>();

How to use LookAt() and add new camera to cameras list?
I understand I can use added by me to SceneGraph.h
void AddCamera(std::shared_ptr<SceneCamera> cam) { m_Cameras.push_back(cam); }

@apanteleev , how to convert PerspectiveCamera to SceneCamera which I can change by LookAt() before add to m_Cameras?

[tigrazone]

solved with this code

                        auto camera = std::make_shared<PerspectiveCamera>();
                        auto node = std::make_shared<SceneGraphNode>();
                        node->SetLeaf(camera);

                        dquat rotation;
                        double3 translation = eye_value;
                        double3 scaling = dm::double3(1.f, 1.f, 1.f);

                        decomposeAffine<double>(dm::daffine3( inverse( lookatZ( normalize(ctr_value - eye_value), normalize(up_value) ) ) ), nullptr, &rotation, nullptr);

                        node->SetTransform(&translation, &rotation, &scaling);

                        m_scene->GetSceneGraph()->Attach(m_scene->GetSceneGraph()->GetRootNode(), node);