clientmap.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#include "irrlichttypes_bloated.h"
#include "map.h"
#include "camera.h"
#include <set>
#include <map>
 
struct MapDrawControl
{
        // Wanted drawing range
        float wanted_range = 0.0f;
        // Overrides limits by drawing everything
        bool range_all = false;
        // Allow rendering out of bounds
        bool allow_noclip = false;
        // show a wire frame for debugging
        bool show_wireframe = false;
};
 
class Client;
class ITextureSource;
class PartialMeshBuffer;
 
namespace irr::scene
{
        class IMeshBuffer;
}
 
namespace irr::video
{
        class IVideoDriver;
}
 
/*
        ClientMap
 
        This is the only map class that is able to render itself on screen.
*/
 
class ClientMap : public Map, public scene::ISceneNode
{
public:
        ClientMap(
                        Client *client,
                        RenderingEngine *rendering_engine,
                        MapDrawControl &control,
                        s32 id
        );
 
        bool maySaveBlocks() override
        {
                return false;
        }
 
        void updateCamera(v3f pos, v3f dir, f32 fov, v3s16 offset, video::SColor light_color);
 
        /*
                Forcefully get a sector from somewhere
        */
        MapSector * emergeSector(v2s16 p) override;
 
        /*
                ISceneNode methods
        */
 
        virtual void OnRegisterSceneNode() override;
 
        virtual void render() override;
 
        virtual const aabb3f &getBoundingBox() const override
        {
                return m_box;
        }
 
        void getBlocksInViewRange(v3s16 cam_pos_nodes,
                v3s16 *p_blocks_min, v3s16 *p_blocks_max, float range=-1.0f);
        void updateDrawList();
        // @brief Calculate statistics about the map and keep the blocks alive
        void touchMapBlocks();
        void updateDrawListShadow(v3f shadow_light_pos, v3f shadow_light_dir, float radius, float length);
        // Returns true if draw list needs updating before drawing the next frame.
        bool needsUpdateDrawList() { return m_needs_update_drawlist; }
        void renderMap(video::IVideoDriver* driver, s32 pass);
 
        void renderMapShadows(video::IVideoDriver *driver,
                        const video::SMaterial &material, s32 pass, int frame, int total_frames);
 
        int getBackgroundBrightness(float max_d, u32 daylight_factor,
                        int oldvalue, bool *sunlight_seen_result);
 
        void renderPostFx(CameraMode cam_mode);
 
        // For debug printing
        void PrintInfo(std::ostream &out) override;
 
        const MapDrawControl & getControl() const { return m_control; }
        f32 getWantedRange() const { return m_control.wanted_range; }
        f32 getCameraFov() const { return m_camera_fov; }
 
        void onSettingChanged(std::string_view name, bool all);
 
protected:
        // use drop() instead
        virtual ~ClientMap();
 
        void reportMetrics(u64 save_time_us, u32 saved_blocks, u32 all_blocks) override;
private:
        bool isMeshOccluded(MapBlock *mesh_block, u16 mesh_size, v3s16 cam_pos_nodes);
 
        // update the vertex order in transparent mesh buffers
        void updateTransparentMeshBuffers();
 
 
        // Orders blocks by distance to the camera
        class MapBlockComparer
        {
        public:
                MapBlockComparer(const v3s16 &camera_block) : m_camera_block(camera_block) {}
 
                bool operator() (const v3s16 &left, const v3s16 &right) const
                {
                        auto distance_left = left.getDistanceFromSQ(m_camera_block);
                        auto distance_right = right.getDistanceFromSQ(m_camera_block);
                        return distance_left > distance_right || (distance_left == distance_right && left > right);
                }
 
        private:
                v3s16 m_camera_block;
        };
 
 
        // reference to a mesh buffer used when rendering the map.
        struct DrawDescriptor {
                v3s16 m_pos;
                union {
                        scene::IMeshBuffer *m_buffer;
                        const PartialMeshBuffer *m_partial_buffer;
                };
                bool m_reuse_material:1;
                bool m_use_partial_buffer:1;
 
                DrawDescriptor(v3s16 pos, scene::IMeshBuffer *buffer, bool reuse_material) :
                        m_pos(pos), m_buffer(buffer), m_reuse_material(reuse_material), m_use_partial_buffer(false)
                {}
 
                DrawDescriptor(v3s16 pos, const PartialMeshBuffer *buffer) :
                        m_pos(pos), m_partial_buffer(buffer), m_reuse_material(false), m_use_partial_buffer(true)
                {}
 
                video::SMaterial &getMaterial();
                u32 draw(video::IVideoDriver* driver);
        };
 
        Client *m_client;
        RenderingEngine *m_rendering_engine;
 
        aabb3f m_box = aabb3f(-BS * 1000000, -BS * 1000000, -BS * 1000000,
                BS * 1000000, BS * 1000000, BS * 1000000);
 
        MapDrawControl &m_control;
 
        v3f m_camera_position = v3f(0,0,0);
        v3f m_camera_direction = v3f(0,0,1);
        f32 m_camera_fov = M_PI;
        v3s16 m_camera_offset;
        video::SColor m_camera_light_color = video::SColor(0xFFFFFFFF);
        bool m_needs_update_transparent_meshes = true;
 
        std::map<v3s16, MapBlock*, MapBlockComparer> m_drawlist;
        std::vector<MapBlock*> m_keeplist;
        std::map<v3s16, MapBlock*> m_drawlist_shadow;
        bool m_needs_update_drawlist;
 
        std::set<v2s16> m_last_drawn_sectors;
 
        bool m_cache_trilinear_filter;
        bool m_cache_bilinear_filter;
        bool m_cache_anistropic_filter;
        u16 m_cache_transparency_sorting_distance;
 
        bool m_loops_occlusion_culler;
        bool m_enable_raytraced_culling;
};