dusklight/src/dusk/imgui/ImGuiCameraOverlay.cpp

#include "f_op/f_op_camera_mng.h"
#include "SSystem/SComponent/c_xyz.h"

#include "imgui.h"
#include "ImGuiConsole.hpp"
#include "ImGuiMenuTools.hpp"

namespace dusk {
    void ImGuiMenuTools::ShowCameraOverlay() {
        if (!ImGuiConsole::CheckMenuViewToggle(ImGuiKey_F6, m_showCameraOverlay)) {
            return;
        }

        auto* cam = (camera_process_class*)dCam_getCamera();

        if (!m_showCameraOverlay || cam == nullptr)
            return;

        auto* dCam = &cam->mCamera;

        ImGuiWindowFlags windowFlags = ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_AlwaysAutoResize |
            ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoNav;
        if (m_cameraOverlayCorner != -1) {
            SetOverlayWindowLocation(m_cameraOverlayCorner);
            windowFlags |= ImGuiWindowFlags_NoMove;
        }

        ImGui::SetNextWindowBgAlpha(0.65f);
        ImGui::SetNextWindowSizeConstraints(ImVec2(300, 0), ImVec2(FLT_MAX, FLT_MAX));

        if (!ImGui::Begin("Camera Debug", nullptr, windowFlags)) {
            ImGui::End();
            return;
        }

        ImGui::SeparatorText("Camera Transform Data");

        cXyz center = dCam->mCenter;
        cXyz eye = dCam->mEye;

        if (ImGui::InputFloat3("Camera Center", &center.x)) {
            dCam->Reset(center, eye);
        }
        if (ImGui::InputFloat3("Camera Eye", &eye.x)) {
            dCam->Reset(center, eye);
        }

        ImGui::InputFloat("Camera FOV", &dCam->mFovy);

        ImGui::SeparatorText("Free-look Data");

        static float eyeYawDeg = 0.0f;
        static float moveSpeed = 10000.0f;
        static float rotSpeed = 5.0f;
        static cXyz freeLookPos = cXyz::Zero;

        bool changed = false;

        if (ImGui::IsKeyDown(ImGuiKey_LeftArrow)) {
            eyeYawDeg += rotSpeed;
            if (eyeYawDeg >= 360.0f)
                eyeYawDeg -= 360.0f;

            changed = true;
        }
        else if (ImGui::IsKeyDown(ImGuiKey_RightArrow)) {
            eyeYawDeg -= rotSpeed;
            if (eyeYawDeg < 0.0f)
                eyeYawDeg += 360.0f;

            changed = true;
        }
        cSAngle yawAngle = cSAngle(eyeYawDeg);
        cXyz frontDir = cXyz(yawAngle.Sin(), 0.0f, yawAngle.Cos());

        if (ImGui::IsKeyDown(ImGuiKey_UpArrow)) {
            freeLookPos -= frontDir * moveSpeed * ImGui::GetIO().DeltaTime;
            changed = true;
        }
        else if (ImGui::IsKeyDown(ImGuiKey_DownArrow)) {
            freeLookPos += frontDir * moveSpeed * ImGui::GetIO().DeltaTime;
            changed = true;
        }

        if (ImGui::IsKeyDown(ImGuiKey_LeftShift)) {
            freeLookPos += cXyz::BaseY * moveSpeed * ImGui::GetIO().DeltaTime;
            changed = true;
        }

        if (ImGui::IsKeyDown(ImGuiKey_LeftCtrl)) {
            freeLookPos -= cXyz::BaseY * moveSpeed * ImGui::GetIO().DeltaTime;
            changed = true;
        }

        if (changed) {
            dCam->Reset(freeLookPos, freeLookPos + (frontDir * 100.0f));
        }

        ImGui::InputFloat("Free-look Yaw", &eyeYawDeg);
        ImGui::InputFloat3("Free-look Position", &freeLookPos.x);
        ImGui::InputFloat("Free-look Move Speed", &moveSpeed);
        ImGui::InputFloat("Free-look Rotation Speed", &rotSpeed);

        ShowCornerContextMenu(m_cameraOverlayCorner, 0);

        ImGui::End();
    }
}