Making a new Component

To add a new component to the editor you must follow all the steps except the optional addition to the Scene::Draw() function.

1. Make a new Componentflag in src/Core/Graphics/Scene/Component/Components.h.

• It must follow according to the name ComponentFlag_XXX
• It must be added under the newest component

2. Create the new component class in src/Core/Graphics/Scene/Component

• Must be in the Dodo namespace
• It must contain the following:

#include "Components.h"
#include "Core/Math/MathFunc.h"

namespace Dodo {
    class XXX
    {
        XXX(xxx);
        ~XXX();
        
        static inline bool IsDrawable() { return /*true*/  /*false*/; }
        static inline const std::string& GetName() { return std::string("XXX"); }
        static constexpr ComponentFlag GetFlagType() { return ComponentFlag::ComponentFlag_XXX; }
        static constexpr int GetIndex() { return Math::floorlog2(GetFlagType()); }
    }
}

3. In Dodo/src/Core/Graphics/Scene/Entity.h add a new type template

using ComponentType = std::variant<ModelComponent*, Rectangle2DComponent*, ..., XXX*, std::monostate>;

4. Dodo/src/Core/Graphics/Scene/Scene.cpp

• In Scene::Draw() inside the switch statement

case n: // n is the same as GetIndex() in the component
    std::get<n>(drawable)->Draw(m_Camera);
    break;

5. Dodo/src/Core/Data/AsciiSceneFile.cpp

• In AsciiSceneFile::Write() under the components section

case n: // n is same as GetIndex() in the component
    auto comp = std::get<n>(varcomp);
    m_File.CreateSection("XXX");
    // Additional data required from the component
    m_File.UnIndent();
    break;

• In AsciiSceneFile::Read() under the lastest component

else if (section == "XXX")
{
    result->AddComponent(id, new XXX(X); // Each component implementation can be different therefore check the implementations of other components.
}

6. Dodoeditor/src/Interface.cpp

• In InitInterface()

m_HierarchyComponents.push_back(Component("XXX"));

• In DrawHierarchy() under if (ent.second.m_ComponentFlags != ComponentFlag_None)

if (ent.second.m_ComponentFlags & ComponentFlag_XXX)
{
    ImGui::BulletText("XXX");
}

• In DrawInspector()

if (ent.m_ComponentFlags & ComponentFlag_XXX)
{
    if (ImGui::TreeNode("XXX"))
    {
        auto& compvar = ent.FindComponent(XXX::GetIndex());
	if (compvar.index() == XXX::GetIndex())
	{
	    XXX* comp = std::get<XXX::GetIndex()>(compvar);
            // Display all the properties of the component such as position, rotation, etc
        }
        else
        {
            // The component has not been created. This is useful because you can, for example, use a browse option before creating the component
            if (ImGui::Button("Browse")) {
		std::string str = Application::s_Application->m_Window->OpenFileSelector(X); // Replace X with what is desired. Two examples are "Model\0*.fbx;*.obj\0" & "Texture\0*.png;*.jpg;*.tga\0"
		if (str != "")
		{
		    if (str._Starts_with(Application::s_Application->m_Window->GetMainWorkDirectory()))
			str.erase(0, Application::s_Application->m_Window->GetMainWorkDirectory().length() + 1);
		    m_Scene->AddComponent(e.first, new XXX(str.c_str()));
		}
	    }
	    ImGui::SameLine();
	    ImGui::Text("...");
        }
        ImGui::TreePop();
    }
}