From 23197e147cc230deb85fc935226a7605d6f8d138 Mon Sep 17 00:00:00 2001
From: hyzboy <hyzboy@gmail.com>
Date: Fri, 14 Jun 2024 09:13:49 +0800
Subject: [PATCH] [WIP]preparing Billboard 2DWay sample

---
 CMSceneGraph                       |   2 +-
 ShaderLibrary/Billboard/2DWay.vert |   0
 example/Basic/Billboard2D.cpp      | 131 +++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+), 1 deletion(-)
 create mode 100644 ShaderLibrary/Billboard/2DWay.vert
 create mode 100644 example/Basic/Billboard2D.cpp

diff --git a/CMSceneGraph b/CMSceneGraph
index c5b0f901..c93bbb82 160000
--- a/CMSceneGraph
+++ b/CMSceneGraph
@@ -1 +1 @@
-Subproject commit c5b0f901b93929431c53cb112b09bc1e3df69665
+Subproject commit c93bbb8296944843f9abe778ab26a0ff432455fa
diff --git a/ShaderLibrary/Billboard/2DWay.vert b/ShaderLibrary/Billboard/2DWay.vert
new file mode 100644
index 00000000..e69de29b
diff --git a/example/Basic/Billboard2D.cpp b/example/Basic/Billboard2D.cpp
new file mode 100644
index 00000000..05277873
--- /dev/null
+++ b/example/Basic/Billboard2D.cpp
@@ -0,0 +1,131 @@
+// Billboard2D
+// 用于实现在3D场景中显示固定象素尺寸的2D内容，比如显示在3D场景中的血条、头顶名字等。
+
+#include"VulkanAppFramework.h"
+#include<hgl/filesystem/FileSystem.h>
+#include<hgl/graph/InlineGeometry.h>
+#include<hgl/graph/VKRenderResource.h>
+#include<hgl/graph/RenderList.h>
+#include<hgl/graph/Camera.h>
+#include<hgl/graph/mtl/Material3DCreateConfig.h>
+
+using namespace hgl;
+using namespace hgl::graph;
+
+class TestApp:public SceneAppFramework
+{
+private:
+
+    Material *          material            =nullptr;
+    Pipeline *          pipeline            =nullptr;
+
+    Primitive *         prim_plane_grid     =nullptr;
+    MaterialInstance *  material_instance[3]{};
+
+private:
+
+    bool InitMDP()
+    {
+        mtl::Material3DCreateConfig cfg(device->GetDeviceAttribute(),"VertexLuminance3D",Prim::Lines);
+
+        cfg.local_to_world=true;
+        cfg.position_format=VAT_VEC2;
+
+        material=db->LoadMaterial("Std3D/VertexLum3D",&cfg);
+        if(!material)return(false);
+
+        Color4f GridColor;
+        COLOR ce=COLOR::BlenderAxisRed;
+
+        for(uint i=0;i<3;i++)
+        {
+            GridColor=GetColor4f(ce,1.0);
+
+            material_instance[i]=db->CreateMaterialInstance(material,nullptr,&GridColor);
+
+            ce=COLOR((int)ce+1);
+        }
+        
+        pipeline=CreatePipeline(material,InlinePipeline::Solid3D,Prim::Lines);
+
+        return pipeline;
+    }
+
+    bool CreateRenderObject()
+    {
+        using namespace inline_geometry;
+
+        struct PlaneGridCreateInfo pgci;
+
+        pgci.grid_size.Set(32,32);
+        pgci.sub_count.Set(8,8);
+
+        pgci.lum=0.75;
+        pgci.sub_lum=1.0;
+
+        PrimitiveCreater pc(device,material->GetDefaultVIL());
+
+        prim_plane_grid=CreatePlaneGrid(&pc,&pgci);
+
+        return prim_plane_grid;
+    }
+
+    Renderable *Add(MaterialInstance *mi,const Matrix4f &mat)
+    {
+        Renderable *ri=db->CreateRenderable(prim_plane_grid,mi,pipeline);
+
+        if(!ri)
+            return(nullptr);
+
+        render_root.CreateSubNode(mat,ri);
+
+        return ri;
+    }
+
+    bool InitScene()
+    {
+        Add(material_instance[0],Matrix4f(1.0f));
+        Add(material_instance[1],rotate(HGL_RAD_90,0,1,0));
+        Add(material_instance[2],rotate(HGL_RAD_90,1,0,0));
+
+        camera->pos=Vector3f(32,32,32);
+        camera_control->SetTarget(Vector3f(0,0,0));
+        camera_control->Refresh();
+
+//        camera_control->SetReserveDirection(true,true);        //反转x,y
+
+        render_root.RefreshMatrix();
+        render_list->Expend(&render_root);
+
+        return(true);
+    }
+
+public:
+
+    ~TestApp()
+    {
+        SAFE_CLEAR(prim_plane_grid);
+    }
+
+    bool Init(uint width,uint height) override
+    {
+        if(!SceneAppFramework::Init(width,height))
+            return(false);
+
+        if(!InitMDP())
+            return(false);
+
+        if(!CreateRenderObject())
+            return(false);
+
+        if(!InitScene())
+            return(false);
+
+        return(true);
+    }
+};//class TestApp:public CameraAppFramework
+
+int main(int,char **)
+{
+    return RunApp<TestApp>(1280,720);
+}