Beam rendering, max entity distance and other stuff

src/client/app.cpp

@@ -82,9 +82,12 @@ void App::Frame()
 	{
 		// glm::mat4 view = glm::lookAt(glm::vec3(15.0f, 0.0f, 1.0f), glm::vec3(0.0f, 0.0f, -13.0f), glm::vec3(0.0f, 0.0f, 1.0f));
 		glm::mat4 proj = glm::perspective(glm::radians(45.0f), aspect, 0.1f, 3000.0f);
-		glm::mat4 view = session_->GetViewMatrix();
+        glm::vec3 eye;
+		glm::mat4 view;
+        session_->GetViewInfo(eye, view);
 
 		params.view_proj = proj * view;
+        params.cam_pos = eye;
 
 		game::view::DrawArgs draw_args(dlist_, params.view_proj, viewport_size_);
 		world->Draw(draw_args);

src/game/entity.hpp

@@ -30,6 +30,9 @@ public:
     void Remove() { removed_ = true; }
     bool IsRemoved() const { return removed_; }
 
+    const Transform& GetRootTransform() const { return root_.local; }
+    float GetMaxDistance() const { return max_distance_; }
+
     virtual ~Entity() = default;
 
 private:
@@ -46,8 +49,11 @@ protected:
     const net::EntType viewtype_;
 
     TransformNode root_;
+
+    float max_distance_ = 700.0f;
     std::string nametag_;
 
+
     bool removed_ = false;
 
 };

src/game/openworld.cpp

@@ -94,7 +94,7 @@ game::OpenWorld::OpenWorld() : World("openworld")
     // }
 
     // spawn bots
-    for (size_t i = 0; i < 30; ++i)
+    for (size_t i = 0; i < 70; ++i)
     {
         SpawnBot();
     }
@@ -262,7 +262,16 @@ static float GetTurnAngle(const glm::vec3& pos, const glm::quat& rot, const glm:
 static void SelectNextNode(BotThinkState& s)
 {
     size_t node = s.path.back();
-    s.path.push_back(s.roads.nbs[s.roads.nodes[node].nbs + (rand() % s.roads.nodes[node].num_nbs)]);
+    size_t num_nbs = s.roads.nodes[node].num_nbs;
+
+    if (num_nbs < 1)
+    {
+        const auto& pos = s.roads.nodes[node].position;
+        std::cout << "node " << node << " has no neighbors!!!1 position: " << pos.x << " " << pos.y << " " << pos.z << std::endl;
+        throw std::runtime_error("no neighbors");
+    }
+
+    s.path.push_back(s.roads.nbs[s.roads.nodes[node].nbs + (rand() % num_nbs)]);
 }
 
 static void BotThink(std::shared_ptr<BotThinkState> s)
@@ -480,13 +489,13 @@ void game::OpenWorld::SpawnBot()
     // auto color = glm::vec3{0.3f, 0.3f, 0.3f};
     auto color = GetRandomColor();
     auto& vehicle = Spawn<Vehicle>(GetRandomCarModel(), color);
-    vehicle.SetNametag("bot (" + std::to_string(vehicle.GetEntNum()) + ")");
+    //vehicle.SetNametag("bot (" + std::to_string(vehicle.GetEntNum()) + ")");
     vehicle.SetPosition(roads->nodes[start_node].position + glm::vec3{0.0f, 0.0f, 5.0f});
 
     auto think_state = std::make_shared<BotThinkState>(vehicle, *roads, start_node);
     BotThink(think_state);
     vehicle.Schedule(rand() % 500, [think_state]() {
-        BotNametagThink(think_state);
+        //BotNametagThink(think_state);
     } );
 }
 

src/game/player.cpp

@@ -1,9 +1,12 @@
 #include "player.hpp"
 
-#include "world.hpp"
-
 #include <iostream>
 
+#define GLM_ENABLE_EXPERIMENTAL
+#include <glm/gtx/norm.hpp>
+
+#include "world.hpp"
+
 game::Player::Player(Game& game, std::string name) : game_(game), name_(std::move(name))
 {
     game_.PlayerJoined(*this);
@@ -30,7 +33,18 @@ void game::Player::Update()
     }
 
     if (world_)
+    {
+        if (cam_ent_)
+        {
+            auto cam_ent = world_->GetEntity(cam_ent_);
+            if (cam_ent)
+            {
+                cull_pos_ = cam_ent->GetRootTransform().position;
+            }
+        }
+
         SyncEntities();
+    }
 }
 
 void game::Player::SetWorld(std::shared_ptr<World> world)
@@ -49,6 +63,8 @@ void game::Player::SetWorld(std::shared_ptr<World> world)
 
 void game::Player::SetCamera(net::EntNum entnum)
 {
+    cam_ent_ = entnum;
+
     auto msg = BeginMsg(net::MSG_CAM);
     msg.Write(entnum);
 }
@@ -121,7 +137,14 @@ void game::Player::SyncEntities()
 
 bool game::Player::ShouldSeeEntity(const Entity& entity) const
 {
-    return true; // TODO: check distance?
+    // max distance check
+    float max_dist = entity.GetMaxDistance();
+    if (glm::distance2(entity.GetRootTransform().position, cull_pos_) > (max_dist * max_dist))
+        return false;
+
+    // TODO: custom callback
+
+    return true;
 }
 
 void game::Player::SendInitEntity(const Entity& entity)

src/game/player.hpp

@@ -59,6 +59,9 @@ private:
     std::set<net::EntNum> known_ents_;
 
     PlayerInputFlags in_ = 0;
+
+    net::EntNum cam_ent_ = 0;
+    glm::vec3 cull_pos_ = glm::vec3(0.0f);
 };
 
 }

src/game/vehicle.cpp

@@ -57,7 +57,7 @@ game::Vehicle::Vehicle(World& world, std::string model_name, const glm::vec3& co
     {
         float wheelRadius = wheeldef.radius;
 
-        float friction = 2.0f; // 5.0f;
+        float friction = 3.0f; // 5.0f;
         float suspensionStiffness = 50.0f;
         // float suspensionDamping = 2.3f;
         // float suspensionCompression = 4.4f;

src/gameview/client_session.cpp

@@ -65,7 +65,7 @@ void game::view::ClientSession::Update(const UpdateInfo& info)
         world_->Update(info);
 }
 
-glm::mat4 game::view::ClientSession::GetViewMatrix() const
+void game::view::ClientSession::GetViewInfo(glm::vec3& eye, glm::mat4& view) const
 {
     glm::vec3 center(0.0f, 0.0f, 2.5f);
 
@@ -84,9 +84,8 @@ glm::mat4 game::view::ClientSession::GetViewMatrix() const
 
     float distance = 8.0f;
 
-    auto eye = center - dir * distance;
+    eye = center - dir * distance;
-
+    view = glm::lookAt(eye, center, glm::vec3(0, 0, 1));
-    return glm::lookAt(eye, center, glm::vec3(0, 0, 1));
 }
 
 audio::Master& game::view::ClientSession::GetAudioMaster() const

src/gameview/client_session.hpp

@@ -27,7 +27,7 @@ public:
 
     const WorldView* GetWorld() const { return world_.get(); } 
 
-    glm::mat4 GetViewMatrix() const;
+    void GetViewInfo(glm::vec3& eye, glm::mat4& view) const;
 
     audio::Master& GetAudioMaster() const;
 

src/gameview/entityview.cpp

@@ -33,7 +33,23 @@ void game::view::EntityView::Update(const UpdateInfo& info)
 void game::view::EntityView::Draw(const DrawArgs& args)
 {
     // std::cout << "TODO draw entity nametag: " << nametag_ << std::endl;
+    DrawNametag(args);
+    //DrawAxes(args);
+}
 
+bool game::view::EntityView::ReadNametag(net::InMessage& msg)
+{
+    // read nametag
+    net::NameTag nametag;
+    if (!msg.Read(nametag))
+        return false;
+
+    nametag_ = nametag;
+    nametag_text_.SetText(nametag);
+}
+
+void game::view::EntityView::DrawNametag(const DrawArgs& args)
+{
     if (nametag_.empty())
         return;
 
@@ -68,13 +84,23 @@ void game::view::EntityView::Draw(const DrawArgs& args)
 
 }
 
-bool game::view::EntityView::ReadNametag(net::InMessage& msg)
+void game::view::EntityView::DrawAxes(const DrawArgs& args)
 {
-    // read nametag
+    const float len = 5.0f;
-    net::NameTag nametag;
+    static const uint32_t colors[] = {0xFF0000FF, 0xFF00FF00, 0xFFFF0000};
-    if (!msg.Read(nametag))
-        return false;
 
-    nametag_ = nametag;
+    for (size_t i = 0; i < 3; i++)
-    nametag_text_.SetText(nametag);
+    {
+        glm::vec3 end(0.0f);
+        end[i] = len;
+
+        gfx::DrawBeamCmd cmd;
+        cmd.start = glm::vec3(root_.matrix * glm::vec4(0.0f, 0.0f, 0.0f, 1.0f));
+        cmd.end = glm::vec3(root_.matrix * glm::vec4(end, 1.0f));
+        cmd.color = colors[i];
+        cmd.radius = 0.05f;
+        //cmd.num_segments = 10;
+        //cmd.max_offset = 0.1f;
+        args.dlist.AddBeam(cmd);
+    }
 }

src/gameview/entityview.hpp

@@ -48,6 +48,9 @@ public:
 private:
     bool ReadNametag(net::InMessage& msg);
 
+    void DrawNametag(const DrawArgs& args);
+    void DrawAxes(const DrawArgs& args);
+
 protected:
     WorldView& world_;
 

src/gameview/vehicleview.cpp

@@ -16,8 +16,6 @@ game::view::VehicleView::VehicleView(WorldView& world, net::InMessage& msg)
 
     model_ = assets::CacheManager::GetVehicleModel("data/" + std::string(modelname) + ".veh");
 
-    // init the other transform to identical
-    root_trans_[0] = root_trans_[1];
     
     auto& modelwheels = model_->GetWheels();
     wheels_.resize(modelwheels.size());
@@ -32,6 +30,9 @@ game::view::VehicleView::VehicleView(WorldView& world, net::InMessage& msg)
     if (!ReadState(msg))
         throw EntityInitError();
     
+    // init the other transform to identical
+    root_trans_[0] = root_trans_[1];
+    
     snd_accel_ = assets::CacheManager::GetSound("data/auto.snd");
     
     // sync state

src/gfx/draw_list.hpp

@@ -19,6 +19,16 @@ struct DrawSurfaceCmd
     float dist = 0.0f;                   // distance to camera - for transparnt sorting
 };
 
+struct DrawBeamCmd
+{
+    glm::vec3 start;
+    glm::vec3 end;
+    uint32_t color = 0xFFFFFFFF;
+    float radius = 0.1f;
+    size_t num_segments = 1;
+    float max_offset = 0.0f;
+};
+
 struct DrawHudCmd
 {
     const VertexArray* va = nullptr;
@@ -30,14 +40,17 @@ struct DrawHudCmd
 struct DrawList
 {
     std::vector<DrawSurfaceCmd> surfaces;
+    std::vector<DrawBeamCmd> beams;
     std::vector<DrawHudCmd> huds;
 
     void AddSurface(const DrawSurfaceCmd& cmd) { surfaces.emplace_back(cmd); }
+    void AddBeam(const DrawBeamCmd& cmd) { beams.emplace_back(cmd); }
     void AddHUD(const DrawHudCmd& cmd) { huds.emplace_back(cmd); }
 
     void Clear()
     {
         surfaces.clear();
+        beams.clear();
         huds.clear();
     }
 };

src/gfx/renderer.cpp

@@ -18,6 +18,9 @@ gfx::Renderer::Renderer()
     ShaderSources::MakeShader(skel_mesh_shader_.shader, SS_SKEL_MESH_VERT, SS_SKEL_MESH_FRAG);
     ShaderSources::MakeShader(solid_shader_, SS_SOLID_VERT, SS_SOLID_FRAG);
     ShaderSources::MakeShader(hud_shader_, SS_HUD_VERT, SS_HUD_FRAG);
+    ShaderSources::MakeShader(beam_shader_, SS_BEAM_VERT, SS_BEAM_FRAG);
+
+	SetupBeamVA();
 }
 
 void gfx::Renderer::Begin(size_t width, size_t height)
@@ -40,9 +43,61 @@ void gfx::Renderer::ClearDepth()
 void gfx::Renderer::DrawList(gfx::DrawList& list, const DrawListParams& params)
 {
 	DrawSurfaceList(list.surfaces, params);
+	DrawBeamList(list.beams, params);
     DrawHudList(list.huds, params);
 }
 
+struct BeamSegment
+{
+	glm::vec3 p0;
+	uint32_t color;
+	glm::vec3 p1;
+	float radius;
+};
+
+void gfx::Renderer::SetupBeamVA()
+{
+	beam_va_ = std::make_unique<VertexArray>(VA_POSITION, 0);
+	
+	static const float quad_points[] = {
+		0.0f, 0.0f, 0.0f,	
+		1.0f, 0.0f, 0.0f,	
+		0.0f, 1.0f, 0.0f,	
+		1.0f, 1.0f, 0.0f,	
+	};
+
+	beam_va_->SetVBOData(quad_points, sizeof(quad_points));
+
+	// create points buffer
+	glBindVertexArray(beam_va_->GetVAOId());
+	beam_segments_vbo_ = std::make_unique<BufferObject>(GL_ARRAY_BUFFER, GL_STREAM_DRAW);
+	beam_segments_vbo_->Bind();
+
+	constexpr size_t STRIDE = sizeof(BeamSegment);
+
+	// p0
+	glEnableVertexAttribArray(10); 
+	glVertexAttribPointer(10, 3, GL_FLOAT, GL_FALSE, STRIDE, (const void*)offsetof(BeamSegment, p0));
+	glVertexAttribDivisor(10, 1);
+	
+	// color
+	glEnableVertexAttribArray(2);
+	glVertexAttribPointer(2, 4, GL_UNSIGNED_BYTE, GL_TRUE, STRIDE, (const void*)offsetof(BeamSegment, color));
+	glVertexAttribDivisor(2, 1);
+
+	// p1
+	glEnableVertexAttribArray(11);
+	glVertexAttribPointer(11, 3, GL_FLOAT, GL_FALSE, STRIDE, (const void*)offsetof(BeamSegment, p1));
+	glVertexAttribDivisor(11, 1);
+
+	// radius
+	glEnableVertexAttribArray(12);
+	glVertexAttribPointer(12, 1, GL_FLOAT, GL_FALSE, STRIDE, (const void*)offsetof(BeamSegment, radius));
+	glVertexAttribDivisor(12, 1);
+
+	glBindVertexArray(0);
+}
+
 void gfx::Renderer::InvalidateShaders()
 {
 	InvalidateMeshShader(mesh_shader_);
@@ -253,6 +308,82 @@ void gfx::Renderer::DrawSurfaceList(std::span<DrawSurfaceCmd> list, const DrawLi
 
 }
 
+static float GetRandomOffset(float max_offset)
+{
+	return (static_cast<float>(rand()) / static_cast<float>(RAND_MAX) - 0.5f) * 2.0f * max_offset;
+}
+
+void gfx::Renderer::DrawBeamList(std::span<DrawBeamCmd> queue, const DrawListParams& params)
+{
+	static std::vector<BeamSegment> segments;
+	static std::vector<glm::vec3> points;
+	segments.clear();
+
+	for (const auto& cmd : queue)
+	{
+		if (cmd.num_segments < 1)
+			continue;
+
+		points.resize(cmd.num_segments + 1);
+
+		const glm::vec3 seg_step = (cmd.end - cmd.start) / static_cast<float>(cmd.num_segments);
+		glm::vec3 pos = cmd.start;
+		for (size_t i = 0; i <= cmd.num_segments; ++i)
+		{
+			points[i] = pos;
+			pos += seg_step;
+		}
+
+		if (cmd.max_offset > 0.0f)
+		{
+			for (auto& p : points)
+			{
+				p.x += GetRandomOffset(cmd.max_offset);
+				p.y += GetRandomOffset(cmd.max_offset);
+				p.z += GetRandomOffset(cmd.max_offset);
+			}
+		}
+
+		for (size_t i = 1; i < points.size(); ++i)
+		{
+			auto& segment = segments.emplace_back();
+			segment.p0 = points[i - 1];
+			segment.p1 = points[i];
+			segment.color = cmd.color;
+			segment.radius = cmd.radius;
+		}
+
+	}
+
+	if (segments.empty())
+		return;
+
+	glBindVertexArray(beam_va_->GetVAOId());
+	beam_segments_vbo_->SetData(segments.data(), segments.size() * sizeof(segments[0]));
+
+	Shader* shader = beam_shader_.get();
+	glUseProgram(shader->GetId());
+	current_shader_ = shader;
+
+	glDisable(GL_CULL_FACE);
+
+	glEnable(GL_DEPTH_TEST);
+    glDepthMask(GL_FALSE);
+
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE); // ADDITIVE blend
+
+	glUniformMatrix4fv(shader->U(gfx::SU_VIEW_PROJ), 1, GL_FALSE, &params.view_proj[0][0]);
+    glUniform3fv(shader->U(gfx::SU_CAMERA), 1, &params.cam_pos[0]);
+
+	glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, segments.size());
+
+	glBindVertexArray(0);
+
+	glDepthMask(GL_TRUE);
+
+}
+
 void gfx::Renderer::DrawHudList(std::span<DrawHudCmd> queue, const DrawListParams& params)
 {
 	// cannot sort anything here, must be drawn in FIFO order for correct overlay

src/gfx/renderer.hpp

@@ -10,6 +10,7 @@ namespace gfx
 {
 	struct DrawListParams
 	{
+        glm::vec3 cam_pos;
 		glm::mat4 view_proj;
 		size_t screen_width = 0;
 		size_t screen_height = 0;
@@ -38,20 +39,30 @@ namespace gfx
 		void DrawList(gfx::DrawList& list, const DrawListParams& params);
 
 	private:
-		MeshShader mesh_shader_;
+		void SetupBeamVA();
-		MeshShader skel_mesh_shader_;
-		std::unique_ptr<Shader> solid_shader_;
-		std::unique_ptr<Shader> hud_shader_;
-
-		const Shader* current_shader_ = nullptr;
 
 		void InvalidateShaders();
 		void InvalidateMeshShader(MeshShader& mshader);
 		void SetupMeshShader(MeshShader& mshader, const DrawListParams& params);
 
 		void DrawSurfaceList(std::span<DrawSurfaceCmd> queue, const DrawListParams& params);
+		void DrawBeamList(std::span<DrawBeamCmd> queue, const DrawListParams& params);
 		void DrawHudList(std::span<DrawHudCmd> queue, const DrawListParams& params);
 
+	private:
+		MeshShader mesh_shader_;
+		MeshShader skel_mesh_shader_;
+		std::unique_ptr<Shader> solid_shader_;
+
+		std::unique_ptr<BufferObject> beam_segments_vbo_;
+		std::unique_ptr<VertexArray> beam_va_;
+		std::unique_ptr<Shader> beam_shader_;
+
+		std::unique_ptr<Shader> hud_shader_;
+
+		const Shader* current_shader_ = nullptr;
+
+
 	};
 
 }

src/gfx/shader.cpp

@@ -10,6 +10,7 @@ static const char* const s_uni_names[] = {
     "u_tex",                // SU_TEX
 	"u_color",              // SU_COLOR
     "u_flags",              // SU_FLAGS
+    "u_camera",             // SU_CAMERA
 };
 
 // Vytvori shader z daneho zdroje

src/gfx/shader.hpp

@@ -15,6 +15,7 @@ namespace gfx
 		SU_TEX,
 		SU_COLOR,
 		SU_FLAGS,
+		SU_CAMERA,
 	
 		SU_COUNT
 	};

src/gfx/shader_sources.cpp

@@ -265,6 +265,50 @@ void main() {
 
 )GLSL",
 
+
+// SS_BEAM_VERT
+SHADER_HEADER
+R"GLSL(
+layout (location = 0) in vec3 a_pos;
+
+// instance
+layout (location = 2) in vec4 a_color;
+layout (location = 10) in vec3 a_p0;
+layout (location = 11) in vec3 a_p1;
+layout (location = 12) in float a_radius;
+
+uniform mat4 u_view_proj;
+uniform vec3 u_camera; 
+
+out vec4 v_color;
+
+void main() {
+    vec3 p = mix(a_p0, a_p1, a_pos.y);
+
+    vec3 seg_dir = a_p1 - a_p0;
+    vec3 cam_dir = u_camera - p;
+    vec3 cross_dir = normalize(cross(seg_dir, cam_dir));
+
+    p += cross_dir * a_radius * (a_pos.x - 0.5) * 2.0;
+    gl_Position = u_view_proj * vec4(p, 1.0);
+    v_color = a_color;
+}	
+)GLSL",
+
+// SS_BEAM_FRAG
+SHADER_HEADER
+R"GLSL(
+
+in vec4 v_color;
+
+layout (location = 0) out vec4 o_color;
+
+void main() {
+    o_color = v_color;
+}	
+
+)GLSL",
+
 };
 
 // Vrati zdrojovy kod shaderu

src/gfx/shader_sources.hpp

@@ -19,6 +19,8 @@ namespace gfx
 		SS_HUD_VERT,
 		SS_HUD_FRAG,
 
+		SS_BEAM_VERT,
+		SS_BEAM_FRAG,
 	};
 
 	class ShaderSources

src/gfx/texture.cpp

@@ -50,6 +50,9 @@ gfx::Texture::Texture(GLuint width, GLuint height, const void* data, GLint inter
 
 	if (mipmaps)
 	{
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 3);
+
 		glGenerateMipmap(GL_TEXTURE_2D);
 	}