green-sky / imgui_entt_entity_editor

A drop-in entity editor for EnTT with Dear ImGui

imgui_entt_entity_editor

A drop-in, single-file entity editor for EnTT, with ImGui as graphical backend. Originally developed for MushMachine.

demo-code (live)

Editor

Editor with Entiy-List

With Drag and Drop

example usage

struct Transform {
    float x = 0.f;
    float y = 0.f;
};

struct Velocity {
    float x = 0.f;
    float y = 0.f;
};

namespace MM {
template <>
void ComponentEditorWidget<Transform>(entt::registry& reg, entt::registry::entity_type e)
{
	auto& t = reg.get<Transform>(e);
	ImGui::DragFloat("x", &t.x, 0.1f);
	ImGui::DragFloat("y", &t.y, 0.1f);
}

template <>
void ComponentEditorWidget<Velocity>(entt::registry& reg, entt::registry::entity_type e)
{
	auto& v = reg.get<Velocity>(e);
	ImGui::DragFloat("x", &v.x, 0.1f);
	ImGui::DragFloat("y", &v.y, 0.1f);
}
}


entt::registry reg;
MM::EntityEditor<entt::entity> editor;

editor.registerComponent<Transform>("Transform");
editor.registerComponent<Velocity>("Velocity");

Dependencies

The editor uses EnTTv3.11.0 and ImGui. (tested with ImGui 1.68, 1.72b, 1.75, 1.78, 1.82, 1.85, 1.87) To use it with EnTTv3.0.0, use the dedicated branch. For specific EnTT version check the tags, if a new EnTT version does not require a update, I won't make a new Release. Releases available for EnTT 3.1.0, 3.1.1, 3.2.0, 3.2.1, 3.2.2, 3.3.x, 3.4.0, 3.6.0-3.8.1, 3.9.0, 3.10.0, 3.11.0.

imgui_entt_entity_editor's Issues

Question about entt::component

I don't seem to be able to compile my project with recent entt versions and your library.
Surprisingly, the demo code works perfectly. This is more of a question than an issue. Where is the entt::component type that your code uses internally? I cannot find it in entt's source.

Edit: Okay, so it seems to be present on the latest release version but not included in the current master branch.
So, entt has decided to not include the entt::component in newer versions I assume.