added RayPicking example

example/Vulkan/CMakeLists.txt

@@ -50,4 +50,5 @@ CreateProject(15.OffscreenRender OffscreenRender.cpp)
 CreateProject(16.DeferredRenderMultiCmdBuffer DeferredRenderMultiCmdBuffer.cpp)
 #CreateProject(14.AutoMaterial auto_material.cpp)
 
-CreateProject(17.Cubemap Cubemap.cpp)
+CreateProject(17.Cubemap Cubemap.cpp)
+CreateProject(18.RayPicking RayPicking.cpp)

example/Vulkan/Geometry3D.cpp

@@ -65,11 +65,11 @@ private:
         pgci.coord[2]=Vector3f( 100, 100,0);
         pgci.coord[3]=Vector3f(-100, 100,0);
 
-        pgci.step.x=20;
-        pgci.step.y=20;
+        pgci.step.x=32;
+        pgci.step.y=32;
 
-        pgci.side_step.x=10;
-        pgci.side_step.y=10;
+        pgci.side_step.x=8;
+        pgci.side_step.y=8;
 
         pgci.color.Set(0.5,0,0,1);
         pgci.side_color.Set(1,0,0,1);

example/Vulkan/RayPicking.cpp

@@ -0,0 +1,189 @@
+// 18.RayPicking
+
+#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/Ray.h>
+#include<hgl/graph/VKVertexAttribBuffer.h>
+
+using namespace hgl;
+using namespace hgl::graph;
+
+constexpr uint32_t SCREEN_WIDTH=1280;
+constexpr uint32_t SCREEN_HEIGHT=720;
+
+static float position_data[2][3]=
+{
+    {100,100,100},
+    {0,0,0}
+};
+
+static float color_data[2][4]=
+{
+    {1,1,0,1},
+    {1,1,0,1}
+};
+
+class TestApp:public CameraAppFramework
+{
+    Color4f color;
+
+    GPUBuffer *ubo_color=nullptr;
+
+private:
+
+    SceneNode           render_root;
+    RenderList *        render_list         =nullptr;
+
+    Material *          material            =nullptr;
+    MaterialInstance *  material_instance   =nullptr;
+    Pipeline *          pipeline            =nullptr;
+
+    Renderable *        ro_plane_grid       =nullptr;
+
+    Renderable *        ro_line             =nullptr;
+
+    VBO *               vbo_pos             =nullptr;
+
+    Ray                 ray;
+
+private:
+
+    bool InitMDP()
+    {
+        material=db->CreateMaterial(OS_TEXT("res/material/VertexColor3D"));
+        if(!material)return(false);
+
+        material_instance=db->CreateMaterialInstance(material);
+        if(!material_instance)return(false);
+        
+        pipeline=CreatePipeline(material_instance,InlinePipeline::Solid3D,Prim::Lines);
+        if(!pipeline)
+            return(false);
+
+        return(true);
+    }
+    
+    RenderableInstance *Add(Renderable *r,const Matrix4f &mat)
+    {
+        RenderableInstance *ri=db->CreateRenderableInstance(r,material_instance,pipeline);
+
+        render_root.CreateSubNode(mat,ri);
+
+        return ri;
+    }
+
+    bool CreateRenderObject()
+    {
+        {
+            struct PlaneGridCreateInfo pgci;
+
+            pgci.coord[0]=Vector3f(-100,-100,0);
+            pgci.coord[1]=Vector3f( 100,-100,0);
+            pgci.coord[2]=Vector3f( 100, 100,0);
+            pgci.coord[3]=Vector3f(-100, 100,0);
+
+            pgci.step.x=32;
+            pgci.step.y=32;
+
+            pgci.side_step.x=8;
+            pgci.side_step.y=8;
+
+            pgci.color.Set(0.25,0,0,1);
+            pgci.side_color.Set(1,0,0,1);
+
+            const VAB *vab=material_instance->GetVAB();
+
+            ro_plane_grid=CreateRenderablePlaneGrid(db,vab,&pgci);
+        }
+
+        {
+            ro_line=db->CreateRenderable(2);
+            if(!ro_line)return(false);
+            
+            if(!ro_line->Set(VAN::Position,  vbo_pos=db->CreateVBO(VF_V3F,2,position_data)))return(false);
+            if(!ro_line->Set(VAN::Color,             db->CreateVBO(VF_V4F,2,color_data)))return(false);
+        }
+
+        return(true);
+    }
+
+    bool InitScene()
+    {
+        Add(ro_plane_grid,Matrix4f(1.0f));
+        Add(ro_line,Matrix4f(1.0f));
+
+        camera->pos=Vector3f(100,100,50);
+        camera_control->SetTarget(Vector3f(0,0,0));
+        camera_control->Refresh();
+
+        render_root.RefreshMatrix();
+        render_list->Expend(camera->info,&render_root);
+
+        return(true);
+    }
+
+public:
+
+    ~TestApp()
+    {
+        SAFE_CLEAR(render_list);
+    }
+
+    bool Init()
+    {
+        if(!CameraAppFramework::Init(SCREEN_WIDTH,SCREEN_HEIGHT))
+            return(false);
+            
+        render_list=new RenderList(device);
+
+        if(!InitMDP())
+            return(false);
+
+        if(!CreateRenderObject())
+            return(false);
+
+        if(!InitScene())
+            return(false);
+
+        return(true);
+    }
+
+    void BuildCommandBuffer(uint32 index)
+    {
+        const CameraInfo &ci=GetCameraInfo();
+
+        ray.Set(GetMouseCoord(),&ci);                           //设置射线查询的屏幕坐标点
+
+        const Vector3f pos=ray.ClosestPoint(Vector3f(0,0,0));   //求射线上与点(0,0,0)最近的点的坐标
+
+        vbo_pos->Write(&pos,3*sizeof(float));                   //更新VBO上这个点的位置
+
+        render_root.RefreshMatrix();
+        render_list->Expend(ci,&render_root);
+
+        VulkanApplicationFramework::BuildCommandBuffer(index,render_list);
+    }
+
+    void Resize(int w,int h)override
+    {
+        CameraAppFramework::Resize(w,h);
+        
+        VulkanApplicationFramework::BuildCommandBuffer(render_list);
+    }
+};//class TestApp:public CameraAppFramework
+
+int main(int,char **)
+{
+    TestApp app;
+
+    if(!app.Init())
+        return(-1);
+
+    while(app.Run());
+
+    return 0;
+}

example/Vulkan/first_triangle.cpp

@@ -61,7 +61,7 @@ private:
         cam.width=extent.width;
         cam.height=extent.height;
 
-        cam.Refresh();
+        cam.RefreshCameraInfo();
 
         ubo_camera_info=db->CreateUBO(sizeof(CameraInfo),&cam.info);
 
@@ -119,7 +119,7 @@ public:
         cam.width=w;
         cam.height=h;
 
-        cam.Refresh();
+        cam.RefreshCameraInfo();
 
         ubo_camera_info->Write(&cam.info);
 

example/common/VulkanAppFramework.h

@@ -326,9 +326,10 @@ class CameraMouseControl:public MouseEvent
     double cur_time;
     double last_time;
 
+    Vector2f mouse_pos;
     Vector2f mouse_last_pos;
 
-protected:
+protected:    
 
     bool OnPressed(int x,int y,MouseButton) override
     {
@@ -342,6 +343,9 @@ protected:
 
     bool OnMove(int x,int y) override
     {
+        mouse_pos.x=x;
+        mouse_pos.y=y;
+
         bool left=HasPressed(MouseButton::Left);
         bool right=HasPressed(MouseButton::Right);
 
@@ -367,6 +371,8 @@ public:
         cur_time=0;
     }
 
+    const Vector2f &GetMouseCoord()const{return mouse_pos;}
+
     void Update()
     {
         cur_time=GetDoubleTime();
@@ -387,6 +393,8 @@ protected:
     CameraKeyboardControl * ckc=nullptr;
     CameraMouseControl *    cmc=nullptr;
 
+    const Vector2f &GetMouseCoord()const{return cmc->GetMouseCoord();}
+
 public:
 
     virtual ~CameraAppFramework()