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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef READ_MAP_H
#define READ_MAP_H
#include <vector>
#include "MapTexture.h"
#include "MapDimensions.h"
#include "Sim/Misc/GlobalConstants.h"
#include "Sim/Misc/GlobalSynced.h"
#include "System/float3.h"
#include "System/type2.h"
#include "System/creg/creg_cond.h"
#include "System/Misc/RectangleOptimizer.h"
#define USE_UNSYNCED_HEIGHTMAP
class CMetalMap;
class CCamera;
class CUnit;
class CSolidObject;
class CBaseGroundDrawer;
struct MapFeatureInfo
{
float3 pos;
/// index to one of the strings above
int featureType;
float rotation;
};
struct MapBitmapInfo
{
MapBitmapInfo() : width(0), height(0) {}
MapBitmapInfo(int w, int h) : width(w), height(h) {}
int width;
int height;
};
enum {
// base textures
MAP_BASE_GRASS_TEX = 0,
MAP_BASE_DETAIL_TEX = 1,
MAP_BASE_MINIMAP_TEX = 2,
MAP_BASE_SHADING_TEX = 3,
MAP_BASE_NORMALS_TEX = 4,
// SSMF textures
MAP_SSMF_NORMALS_TEX = 5,
MAP_SSMF_SPECULAR_TEX = 6,
MAP_SSMF_SPLAT_DISTRIB_TEX = 7,
MAP_SSMF_SPLAT_DETAIL_TEX = 8,
MAP_SSMF_SPLAT_NORMAL_TEX = 9,
MAP_SSMF_SKY_REFLECTION_TEX = 10,
MAP_SSMF_LIGHT_EMISSION_TEX = 11,
MAP_SSMF_PARALLAX_HEIGHT_TEX = 12,
};
class CReadMap
{
protected:
CReadMap();
/// called by implementations of CReadMap
void Initialize();
virtual void UpdateHeightMapUnsynced(const SRectangle&) = 0;
public:
//OK since it's loaded with SerializeObjectInstance
CR_DECLARE_STRUCT(CReadMap)
static CReadMap* LoadMap(const std::string& mapname);
static inline unsigned char EncodeHeight(const float h) {
return std::max(0, 255 + int(10.0f * h));
}
/// creg serialize callback
void Serialize(creg::ISerializer* s);
void PostLoad();
/**
* calculates derived heightmap information
* such as normals, centerheightmap and slopemap
*/
void UpdateHeightMapSynced(SRectangle rect, bool initialize = false);
void UpdateLOS(const SRectangle& rect);
void BecomeSpectator();
void UpdateDraw(bool firstCall);
virtual ~CReadMap();
virtual void Update() {}
virtual void UpdateShadingTexture() {}
virtual void InitGroundDrawer() = 0;
virtual void KillGroundDrawer() = 0;
virtual CBaseGroundDrawer* GetGroundDrawer() { return 0; }
virtual unsigned int GetGrassShadingTexture() const { return 0; }
virtual unsigned int GetMiniMapTexture() const { return 0; }
/**
* a texture with RGB for shading and A for height
* (0 := above water; 1-255 := under water = 255+height*10)
*/
virtual unsigned int GetShadingTexture() const = 0;
virtual unsigned int GetTexture(unsigned int type, unsigned int num = 0) const { return 0; }
virtual int2 GetTextureSize(unsigned int type, unsigned int num = 0) const { return int2(0, 0); }
virtual bool SetLuaTexture(const MapTextureData&) { return false; }
/// Draws the minimap in a quad (with extends: (0,0)-(1,1))
virtual void DrawMinimap() const = 0;
/// Feature creation
virtual int GetNumFeatures() = 0;
virtual int GetNumFeatureTypes() = 0;
/// Returns MapFeatureInfo[GetNumFeatures()]
virtual void GetFeatureInfo(MapFeatureInfo* f) = 0;
virtual const char* GetFeatureTypeName(int typeID) = 0;
/**
* Infomaps (such as metal map, grass map, ...),
* handling them with a string as type seems flexible...
* Some map types:
* "metal" - metalmap
* "grass" - grassmap
*/
virtual unsigned char* GetInfoMap(const std::string& name, MapBitmapInfo* bm) = 0;
virtual void FreeInfoMap(const std::string& name, unsigned char* data) = 0;
/// Determine visibility for a rectangular grid
/// call ResetState for statically allocated drawer objects
struct IQuadDrawer
{
virtual ~IQuadDrawer() {}
virtual void ResetState() = 0;
virtual void DrawQuad(int x, int y) = 0;
};
virtual void GridVisibility(CCamera* cam, IQuadDrawer* cb, float maxDist, int quadSize, int extraSize = 0) = 0;
/// synced only
const float* GetOriginalHeightMapSynced() const { return &originalHeightMap[0]; }
const float* GetCenterHeightMapSynced() const { return ¢erHeightMap[0]; }
const float* GetMIPHeightMapSynced(unsigned int mip) const { return mipPointerHeightMaps[mip]; }
const float* GetSlopeMapSynced() const { return &slopeMap[0]; }
const unsigned char* GetTypeMapSynced() const { return &typeMap[0]; }
unsigned char* GetTypeMapSynced() { return &typeMap[0]; }
/// unsynced only
const float3* GetVisVertexNormalsUnsynced() const { return &visVertexNormals[0]; }
/// synced versions
const float* GetCornerHeightMapSynced() const { return sharedCornerHeightMaps[true]; }
const float3* GetFaceNormalsSynced() const { return sharedFaceNormals[true]; }
const float3* GetCenterNormalsSynced() const { return sharedCenterNormals[true]; }
const float3* GetCenterNormals2DSynced() const { return sharedCenterNormals2D[true]; }
/// unsynced versions
const float* GetCornerHeightMapUnsynced() const { return sharedCornerHeightMaps[false]; }
const float3* GetFaceNormalsUnsynced() const { return sharedFaceNormals[false]; }
const float3* GetCenterNormalsUnsynced() const { return sharedCenterNormals[false]; }
const float3* GetCenterNormals2DUnsynced() const { return sharedCenterNormals2D[false]; }
/// shared interface
const float* GetSharedCornerHeightMap(bool synced) const { return sharedCornerHeightMaps[synced]; }
const float* GetSharedCenterHeightMap(bool synced) const { return sharedCenterHeightMaps[synced]; }
const float3* GetSharedFaceNormals(bool synced) const { return sharedFaceNormals[synced]; }
const float3* GetSharedCenterNormals(bool synced) const { return sharedCenterNormals[synced]; }
const float3* GetSharedCenterNormals2D(bool synced) const { return sharedCenterNormals2D[synced]; }
const float* GetSharedSlopeMap(bool synced) const { return sharedSlopeMaps[synced]; }
/// if you modify the heightmap through these, call UpdateHeightMapSynced
float SetHeight(const int idx, const float h, const int add = 0);
float AddHeight(const int idx, const float a);
float GetInitMinHeight() const { return initHeightBounds.x; }
float GetCurrMinHeight() const { return currHeightBounds.x; }
float GetInitMaxHeight() const { return initHeightBounds.y; }
float GetCurrMaxHeight() const { return currHeightBounds.y; }
float GetBoundingRadius() const { return boundingRadius; }
bool IsUnderWater() const { return (currHeightBounds.y < 0.0f); }
bool IsAboveWater() const { return (currHeightBounds.x >= 0.0f); }
bool HasVisibleWater() const;
bool HasOnlyVoidWater() const;
unsigned int GetMapChecksum() const { return mapChecksum; }
unsigned int CalcHeightmapChecksum();
unsigned int CalcTypemapChecksum();
private:
void UpdateCenterHeightmap(const SRectangle& rect, bool initialize);
void UpdateMipHeightmaps(const SRectangle& rect, bool initialize);
void UpdateFaceNormals(const SRectangle& rect, bool initialize);
void UpdateSlopemap(const SRectangle& rect, bool initialize);
inline void HeightMapUpdateLOSCheck(const SRectangle& rect);
inline bool HasHeightMapChanged(const int lmx, const int lmy);
inline void InitHeightMapDigestsVectors();
public:
/// number of heightmap mipmaps, including full resolution
static const int numHeightMipMaps = 7;
/// Metal-density/height-map
CMetalMap* metalMap;
protected:
// these point to the actual heightmap data
// which is allocated by subclass instances
std::vector<float>* heightMapSyncedPtr; //< size: (mapx+1)*(mapy+1) (per vertex) [SYNCED, updates on terrain deformation]
std::vector<float>* heightMapUnsyncedPtr; //< size: (mapx+1)*(mapy+1) (per vertex) [UNSYNCED]
std::vector<float> originalHeightMap; //< size: (mapx+1)*(mapy+1) (per vertex) [SYNCED, does NOT update on terrain deformation]
std::vector<float> centerHeightMap; //< size: (mapx )*(mapy ) (per face) [SYNCED, updates on terrain deformation]
std::vector< std::vector<float> > mipCenterHeightMaps;
/**
* array of pointers to heightmaps in different resolutions,
* mipPointerHeightMaps[0 ] is full resolution (centerHeightMap),
* mipPointerHeightMaps[n+1] is half resolution of mipPointerHeightMaps[n] (mipCenterHeightMaps[n - 1])
*/
std::vector<float*> mipPointerHeightMaps;
std::vector<float3> visVertexNormals; //< size: (mapx + 1) * (mapy + 1), contains one vertex normal per corner-heightmap pixel [UNSYNCED]
std::vector<float3> faceNormalsSynced; //< size: 2*mapx * mapy , contains 2 normals per quad -> triangle strip [SYNCED]
std::vector<float3> faceNormalsUnsynced; //< size: 2*mapx * mapy , contains 2 normals per quad -> triangle strip [UNSYNCED]
std::vector<float3> centerNormalsSynced; //< size: mapx * mapy , contains 1 interpolated normal per quad, same as (facenormal0+facenormal1).Normalize()) [SYNCED]
std::vector<float3> centerNormalsUnsynced;
std::vector<float3> centerNormals2DSynced;
std::vector<float3> centerNormals2DUnsynced;
std::vector<float> slopeMap; //< size: (mapx/2) * (mapy/2) , same as 1.0 - interpolate(centernomal[i]).y [SYNCED]
std::vector<unsigned char> typeMap;
CRectangleOptimizer unsyncedHeightMapUpdates;
CRectangleOptimizer unsyncedHeightMapUpdatesTemp;
private:
// these combine the various synced and unsynced arrays
// for branch-less access: [0] = !synced, [1] = synced
const float* sharedCornerHeightMaps[2];
const float* sharedCenterHeightMaps[2];
const float3* sharedFaceNormals[2];
const float3* sharedCenterNormals[2];
const float3* sharedCenterNormals2D[2];
const float* sharedSlopeMaps[2];
#ifdef USE_UNSYNCED_HEIGHTMAP
/// used to filer LOS updates (so only update UHM on LOS updates when the heightmap was changed beforehand)
/// size: in LOS resolution
std::vector<unsigned char> syncedHeightMapDigests;
std::vector<unsigned char> unsyncedHeightMapDigests;
#endif
unsigned int mapChecksum;
float2 initHeightBounds; //< initial minimum- and maximum-height (before any deformations)
float2 currHeightBounds; //< current minimum- and maximum-height
float boundingRadius;
};
extern CReadMap* readMap;
extern MapDimensions mapDims;
inline float CReadMap::SetHeight(const int idx, const float h, const int add) {
float& x = (*heightMapSyncedPtr)[idx];
// add=0 <--> x = x*0 + h = h
// add=1 <--> x = x*1 + h = x+h
x = x * add + h;
currHeightBounds.x = std::min(x, currHeightBounds.x);
currHeightBounds.y = std::max(x, currHeightBounds.y);
return x;
}
inline float CReadMap::AddHeight(const int idx, const float a) {
return SetHeight(idx, a, 1);
}
/// Converts a map-square into a float3-position.
static inline float3 SquareToFloat3(int xSquare, int zSquare) {
const float* hm = readMap->GetCenterHeightMapSynced();
const float h = hm[(zSquare * mapDims.mapx) + xSquare];
return float3(xSquare * SQUARE_SIZE, h, zSquare * SQUARE_SIZE);
}
static inline float3 SquareToFloat3(int2 sq) {
return SquareToFloat3(sq.x, sq.y);
}
/// TODO: use in SM3 renderer also
static inline float GetVisibleVertexHeight(int idx) {
const float* hm = readMap->GetCornerHeightMapUnsynced();
return hm[idx];
}
#endif /* READ_MAP_H */
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