elem_camera.hpp

/*
 * Copyright (c) 2022-2026, NVIDIA CORPORATION.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-FileCopyrightText: Copyright (c) 2022-2026, NVIDIA CORPORATION.
 * SPDX-License-Identifier: Apache-2.0
 */

#pragma once

#include <imgui/imgui.h>
#include <imgui/imgui_internal.h>
#include <nvutils/camera_manipulator.hpp>

#include "application.hpp"

/*-------------------------------------------------------------------------------------------------
# class nvvkhl::ElementCamera

This class is an element of the application that is responsible for the camera manipulation. 
It is using the `nvutils::CameraManipulator` to handle the camera movement and interaction.

To use this class, you need to add it to the `nvvkhl::Application` using the `addElement` method.

-------------------------------------------------------------------------------------------------*/


namespace nvapp {

struct ElementCamera : public nvapp::IAppElement
{
  ElementCamera(std::shared_ptr<nvutils::CameraManipulator> camera = nullptr) { m_cameraManip = camera; }

  void setCameraManipulator(std::shared_ptr<nvutils::CameraManipulator>& pCamera) { m_cameraManip = pCamera; }
  void onAttach(nvapp::Application* app) override;
  void onUIRender() override;
  void onResize(VkCommandBuffer cmd, const VkExtent2D& size) override;

  std::shared_ptr<nvutils::CameraManipulator> getCameraManipulator() const { return m_cameraManip; }

  // Can be called independently
  static void updateCamera(std::shared_ptr<nvutils::CameraManipulator> m_cameraManip, ImGuiWindow* viewportWindow);

  static float wheelSpeed;

private:
  std::shared_ptr<nvutils::CameraManipulator> m_cameraManip{};
};

}  // namespace nvapp