ULRE/inc/hgl/WorkObject.h

#pragma once
#include<hgl/type/object/TickObject.h>
#include<hgl/graph/RenderFramework.h>
#include<hgl/graph/VKRenderResource.h>
#include<hgl/graph/mtl/MaterialLibrary.h>
#include<hgl/graph/Renderer.h>
#include<hgl/graph/Scene.h>
#include<hgl/Time.h>
//#include<iostream>

namespace hgl
{
    namespace graph::mtl
    {
        class MaterialCreateInfo;
    }

    /**
    * 工作对象</p>
    * 
    * WorkObject被定义为工作对象，所有的渲染控制都需要被写在WorkObject的Render函数下。
    */
    class WorkObject:public TickObject
    {
        graph::RenderFramework *render_framework=nullptr;

        bool destroy_flag=false;
        bool render_dirty=true;

    protected:

        //以下数据均取自RenderFramework

        graph::RenderResource *db=nullptr;                  //暂时的，未来会被更好的机制替代

        graph::Scene *      scene=nullptr;                  //场景
        graph::Renderer *   renderer=nullptr;               //渲染器

    public:

        graph::RenderFramework *    GetRenderFramework  (){return render_framework;}
        graph::VulkanDevice *       GetDevice           (){return render_framework->GetDevice();}
        graph::VulkanDevAttr *      GetDevAttr          (){return render_framework->GetDevAttr();}
        graph::TextureManager *     GetTextureManager   (){return render_framework->GetTextureManager();}

        const VkExtent2D &          GetExtent           (){return renderer->GetExtent();}

        graph::Scene *              GetScene            (){return scene;}
        graph::SceneNode *          GetSceneRoot        (){return scene->GetRootNode();}
        graph::Renderer *           GetRenderer         (){return renderer;}
        graph::Camera *             GetCamera           (){return renderer->GetCamera();}
        graph::CameraControl *      GetCameraControl    (){return render_framework->GetDefaultCameraControl();}

        bool                        GetMouseCoord       (Vector2i *mc)const{return render_framework->GetMouseCoord(mc);}

    public:

        const   bool IsDestroy  ()const{return destroy_flag;}
                void MarkDestory(){destroy_flag=true;}

        const   bool IsRenderDirty  ()const{return render_dirty;}
                void MarkRenderDirty(){render_dirty=true;}

    public:

        WorkObject(graph::RenderFramework *,graph::Renderer *r=nullptr);
        virtual ~WorkObject()=default;

        virtual bool Init()=0;

        virtual void OnRendererChange(graph::RenderFramework *rf,graph::Renderer *r);
        
        virtual void OnResize(const VkExtent2D &){}

        virtual void Tick(double){}

        virtual void Render(double delta_time);

    public:

    #define WO_FUNC_FROM_RENDER_FRAMEWORK(name,return_type) template<typename ...ARGS> return_type name(ARGS...args){return render_framework?render_framework->name(args...):nullptr;}

        WO_FUNC_FROM_RENDER_FRAMEWORK(CreatePipeline,graph::Pipeline *)
        WO_FUNC_FROM_RENDER_FRAMEWORK(CreateMaterialInstance,graph::MaterialInstance *)
        WO_FUNC_FROM_RENDER_FRAMEWORK(GetPrimitiveCreater,SharedPtr<graph::PrimitiveCreater>)
        //WO_FUNC_FROM_RENDER_FRAMEWORK(CreatePrimitive,graph::Primitive *)
        WO_FUNC_FROM_RENDER_FRAMEWORK(CreateMesh,graph::Mesh *)

    #undef WO_FUNC_FROM_RENDER_FRAMEWORK


        graph::Primitive *CreatePrimitive(const AnsiString &name,
                                            const uint32_t vertices_count,
                                            const graph::VIL *vil,
                                            const std::initializer_list<graph::VertexAttribDataPtr> &vad_list)
        {
            return render_framework?render_framework->CreatePrimitive(name,vertices_count,vil,vad_list):nullptr;
        }

    public: //Component 相关

        template<typename C,typename ...ARGS>
        inline C *CreateComponent(ARGS...args)
        {
            return render_framework?render_framework->CreateComponent<C>(args...):nullptr; //创建组件
        }
    };//class WorkObject

    /**
    * 但我们认为游戏开发者不应该关注如何控制渲染，而应该关注如何处理游戏逻辑.
    * 所以我们在WorkObject的基础上再提供RenderWorkObject派生类，用于直接封装好的渲染场景树控制。
    * 
    * 开发者仅需要将要渲染的物件放置于场景树即可。

    * 但开发者也可以直接使用WorkObject，自行管理这些事。
    * */
}//namespcae hgl