Dear ImGui for Unity

This repository is fork with URP and Unity 2021.3 LTS support

UPM package for the immediate mode GUI library, Dear ImGui (https://github.com/ocornut/imgui).

Usage

• Add package from git URL: https://github.com/vlandemart/dear-imgui-unity.git .
• Add a DearImGui component to one of the objects in the scene.
• When using the Universal Render Pipeline, add a Render Im Gui Feature render feature to the renderer asset. Assign it to the render feature field of the DearImGui component.
• When using the High Definition Render Pipeline, add a custom render pass and select "DearImGuiPass" injected after post processing.
• Subscribe to the ImGuiUn.Layout event and use ImGui functions.
• Example script:

  using UnityEngine;
  using ImGuiNET;
  
  public class DearImGuiDemo : MonoBehaviour
  {
      void OnEnable()
      {
          ImGuiUn.Layout += OnLayout;
      }
  
      void OnDisable()
      {
          ImGuiUn.Layout -= OnLayout;
      }
  
      void OnLayout()
      {
          ImGui.ShowDemoWindow();
      }
  }

Known Issues

• Alpha blending is incorrect when using HDRP. Still need to investigate why, it seems like the closer to 50% alpha you get the more opaque an object appears.
• Procedural rendering is not yet supported on HDRP.

See Also

This package uses Dear ImGui C bindings by cimgui and the C# wrapper by ImGui.NET.

The development project for the package can be found at https://github.com/realgamessoftware/dear-imgui-unity-dev .