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Terrain.cpp
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#include "Terrain.h"
#include "World.h"
#include "WorldCell.h"
#include "Sector_GeoBlock.h"
#include "ObjectManager.h"
#include "Sprite_ZAxis.h"
#include "../render/TextureCache.h"
#include "../render/Camera.h"
#include "../fileformats/TextureTypes.h"
#include "../fileformats/ArchiveTypes.h"
#include "../fileformats/ArchiveManager.h"
#include "../procedural/ProceduralFunc.h"
#include "../fileformats/Location_Daggerfall.h"
#include "../memory/ScratchPad.h"
#include "../math/Math.h"
#include "../os/Input.h"
//just load the Daggerfall skyloader for now..., fix later.
#include "../fileformats/SkyLoader_Daggerfall.h"
#include <algorithm>
#include <cstring>
struct TerrainVtx
{
float x, y, z;
float nx, ny, nz;
float u, v;
};
TextureHandle m_ahTex[256];
//Constants
const int Terrain::c_numVertexEdge = CHUNK_TILE_WIDTH * TILE_QUAD_WIDTH + 1;
const float Terrain::c_fTotalWidth = (float)CHUNK_TILE_WIDTH * 1024.0f;
const float Terrain::c_fTotalHeight = (float)CHUNK_TILE_WIDTH * 1024.0f;
const Vector3 Terrain::c_startPos( -c_fTotalWidth*0.5f, -c_fTotalHeight*0.5f, 0.0f );
Vector3 Terrain::m_vCamDir;
Vector3 Terrain::m_vCamLoc;
TextureHandle m_hDebugHM;
TextureHandle m_hDebugClimate;
TextureHandle m_hDebugGroundTex;
TextureHandle m_hPosMarker;
bool m_bShowTerrainDebug = false;
int32_t m_nTerrainMapX = 0;
int32_t m_nTerrainMapY = 0;
int32_t m_nTerrainMapScale = 1;
const float m_fSkyTop = 136.0f;
const float m_fSkyBot = -4.0f;
//Texture Tile Mapping Data
#define E(a,b,c,d) a+(b<<2)+(c<<4)+(d<<6)
static const int32_t _baseTileCnt=4;
static const int32_t _comboCount = _baseTileCnt*_baseTileCnt*_baseTileCnt*_baseTileCnt;
static int32_t _anTileMapping[_comboCount];
static const int32_t _workSetSize = 56;
static int32_t _anWorkingSet[]=
{
E(0,0,0,0), E(1,1,1,1), E(2,2,2,2), E(3,3,3,3), -1, E(1,0,0,0),
E(1,0,1,0), E(1,1,1,0), -1, -1, E(2,1,1,1), E(2,1,2,1),
E(2,2,2,1), -1, -1, E(3,2,2,2), E(3,2,3,2), E(3,3,3,2),
-1, -1, E(2,0,0,0), E(2,0,2,0), E(2,2,2,0), -1,
-1, E(3,1,1,1), E(3,1,3,1), E(3,3,3,1), -1, -1,
E(3,0,0,0), E(3,0,3,0), E(3,3,3,0), -1, E(1,0,2,0), E(2,0,3,0),
E(1,0,3,0), E(1,2,1,0), E(1,3,1,0), E(1,3,1,2), E(2,1,2,0), E(2,3,2,0),
E(2,3,2,1), E(3,1,3,0), E(3,2,3,0), E(3,2,3,1), -1, -1,
E(1,0,0,1), E(2,0,0,2), E(3,0,0,3), E(2,1,1,2), E(3,1,1,3), E(3,2,2,3),
-1, -1
};
static int32_t m_anMapSky[]=
{
29,
9,
9,
1,
29,
29,
25,
17,
17,
17
};
int32_t Terrain::s_anMapClimate[]=
{
CLIMATE_SWAMP,
CLIMATE_DESERT,
CLIMATE_DESERT,
CLIMATE_MOUNTAIN,
CLIMATE_SWAMP,
CLIMATE_SWAMP,
CLIMATE_DESERT,
CLIMATE_MOUNTAIN,
CLIMATE_TEMPERATE,
CLIMATE_TEMPERATE,
};
int32_t Terrain::s_anMapFlat[]=
{
502,
503,
503,
510,
500,
502,
503,
504,
508,
508
};
void TerrainDebug_KeyDownCB(int32_t key)
{
if ( key == XL_F3 )
{
m_bShowTerrainDebug = !m_bShowTerrainDebug;
}
if ( key == XL_ADD )
{
m_nTerrainMapScale = Math::Min( m_nTerrainMapScale<<1, 16 );
}
else if ( key == XL_SUBTRACT )
{
m_nTerrainMapScale = Math::Max( m_nTerrainMapScale>>1, 1 );
}
}
Terrain::Terrain(IDriver3D *pDriver, World *pWorld)
{
m_pDriver = pDriver;
m_pWorld = pWorld;
m_bActive = false;
m_bMeshBuilt = false;
m_nWidth = 0;
m_nHeight = 0;
m_x = -1;
m_y = -1;
m_afHeightmap = nullptr;
m_pClimate = nullptr;
m_afCoastalDist = nullptr;
m_pSector = nullptr;
m_pWorldCell = nullptr;
for (uint32_t l=0; l<LOD_COUNT; l++)
{
m_LOD[l].m_pVB = nullptr;
for (int i=0; i<CHUNK_COUNT; i++) m_LOD[l].m_aChunks[i].m_pChunkIB = nullptr;
m_LOD[l].m_pGlobalIB = nullptr;
m_LOD[l].m_pLocalHM = xlNew float[(CHUNK_TILE_WIDTH*TILE_QUAD_WIDTH+1) * (CHUNK_TILE_WIDTH*TILE_QUAD_WIDTH+1)];
m_LOD[l].m_pLocalNM = xlNew Vector3[(CHUNK_TILE_WIDTH*TILE_QUAD_WIDTH+1) * (CHUNK_TILE_WIDTH*TILE_QUAD_WIDTH+1)];
m_LOD[l].m_pHM_Flags = xlNew float[(CHUNK_TILE_WIDTH*TILE_QUAD_WIDTH+1) * (CHUNK_TILE_WIDTH*TILE_QUAD_WIDTH+1)];
}
//debug
Input::AddKeyDownCallback( TerrainDebug_KeyDownCB, Input::KDCb_FLAGS_NOREPEAT );
m_ChunkRenderList.reserve( CHUNK_COUNT );
m_pSkyLoader = xlNew SkyLoader_Daggerfall();
//for now just load a region.
m_pSkyLoader->LoadSky(0);
}
Terrain::~Terrain()
{
if ( m_afHeightmap )
{
xlDelete [] m_afHeightmap;
}
if ( m_afCoastalDist )
{
xlDelete [] m_afCoastalDist;
}
if ( m_pClimate )
{
xlDelete [] m_pClimate;
}
for (uint32_t l=0; l<LOD_COUNT; l++)
{
if ( m_LOD[l].m_pVB )
{
xlDelete m_LOD[l].m_pVB;
}
if ( m_LOD[l].m_aChunks[0].m_pChunkIB )
{
for (int i=0; i<CHUNK_COUNT; i++) { xlDelete m_LOD[l].m_aChunks[i].m_pChunkIB; }
}
if ( m_LOD[l].m_pGlobalIB )
{
xlDelete m_LOD[l].m_pGlobalIB;
}
xlDelete [] m_LOD[l].m_pLocalHM;
xlDelete [] m_LOD[l].m_pLocalNM;
xlDelete [] m_LOD[l].m_pHM_Flags;
}
xlDelete m_pSkyLoader;
xlDelete m_pSector;
xlDelete m_pWorldCell;
}
void Terrain::BinLocations()
{
//clear out the map, if it is already loaded.
m_LocationMap.clear();
//now place locations on the map...
for (uint32_t r=0; r<WorldMap::m_uRegionCount; r++)
{
for (uint32_t l=0; l<WorldMap::m_pRegions[r].m_uLocationCount; l++)
{
uint32_t x = (uint32_t)(WorldMap::m_pRegions[r].m_pLocations[l].m_x/8.0f);
uint32_t y = (uint32_t)(WorldMap::m_pRegions[r].m_pLocations[l].m_y/8.0f);
assert(x >= 0 && x < 1000);
assert(y >= 0 && y < 500);
uint32_t key = LOC_KEY(x,y);
m_LocationMap[key] = &WorldMap::m_pRegions[r].m_pLocations[l];
}
}
}
//////////////////////////////////////////////////////
//Load here for now, however this should be moved later
//so other games can use terrain.
//////////////////////////////////////////////////////
struct MapPixelData
{
uint16_t FileIndex;
uint8_t Climate;
uint8_t ClimateNoise;
uint8_t ElevNoise[25]; //5x5 noise?
};
void Terrain::LoadHeightmap()
{
static uint32_t uHM_Data[1000*500];
const char *szFile = "WOODS.WLD";
if ( ArchiveManager::File_Open(szFile) )
{
ScratchPad::StartFrame();
//Read the file.
uint32_t uLen = ArchiveManager::File_GetLength();
uint8_t *pData = (uint8_t *)ScratchPad::AllocMem( uLen+1 );
ArchiveManager::File_Read(pData, 0, uLen);
ArchiveManager::File_Close();
//Process the contents.
int32_t index = 0;
uint32_t OffsetSize = *((uint32_t *)&pData[index]); index += 4;
uint32_t Width = *((uint32_t *)&pData[index]); index += 4;
uint32_t Height = *((uint32_t *)&pData[index]); index += 4;
index += 4; //NullValue
uint32_t DataSec1Offs = *((uint32_t *)&pData[index]); index += 4;
index += 8; //unknown * 2
uint32_t AltMapOffs = *((uint32_t *)&pData[index]); index += 4;
index += 28*4; //uint32 * 28
assert(Width == 1000);
assert(Height == 500);
//500000 offsets...
#if 0
uint32_t *pDataOffs = (uint32_t *)&pData[index];
MapPixelData *pMapPixData = (MapPixelData *)ScratchPad::AllocMem(Width*Height*sizeof(MapPixelData));
for (uint32_t i=0; i<Width*Height; i++)
{
index = pDataOffs[i];
index += 2; index += 4; //unknown, null
pMapPixData[i].FileIndex = *((uint16_t *)&pData[index]); index += 2;
pMapPixData[i].Climate = *((uint8_t *)&pData[index]); index++;
pMapPixData[i].ClimateNoise = *((uint8_t *)&pData[index]); index++;
index += 4*3; //null
memcpy(pMapPixData[i].ElevNoise, &pData[index], 25);
}
#endif
//Read altitude...
index = AltMapOffs;
uint8_t *pAltMap = (uint8_t *)&pData[index];
m_nWidth = Width;
m_nHeight = Height;
m_afHeightmap = xlNew float[Width*Height];
m_afCoastalDist = xlNew float[Width*Height];
FilterHeightMap(pAltMap, m_afHeightmap, m_afCoastalDist);
//DEBUG
float fOO64 = (1.0f/64.0f);
for (uint32_t i=0; i<1000*500; i++)
{
uint32_t I = (uint32_t)Math::clamp( m_afHeightmap[i]*fOO64, 0.0f, 255.0f );
uHM_Data[i] = I | (I<<8) | (I<<16) | (0xff<<24);
}
m_hDebugHM = m_pDriver->CreateTexture(1000, 500, IDriver3D::TEX_FORMAT_FORCE_32bpp, (uint8_t *)&uHM_Data[0], false);
//
ScratchPad::FreeFrame();
}
szFile = "CLIMATE.PAK";
if ( ArchiveManager::File_Open(szFile) )
{
ScratchPad::StartFrame();
//Read the file.
uint32_t uLen = ArchiveManager::File_GetLength();
uint8_t *pData = (uint8_t *)ScratchPad::AllocMem( uLen+1 );
ArchiveManager::File_Read(pData, 0, uLen);
ArchiveManager::File_Close();
//read climate data.
m_pClimate = xlNew uint8_t[1001*500];
uint32_t index = 0;
uint32_t *pOffsList = (uint32_t *)&pData[index];
for (int y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
index = pOffsList[y];
int32_t x = 0;
while (x < 1000)
{
uint16_t Count = *((uint16_t *)&pData[index]); index += 2;
uint8_t Value = *((uint8_t *)&pData[index]); index++;
for (uint32_t i=0; i<Count; i++, x++)
{
m_pClimate[yOffs+x] = Value;
}
};
}
//DEBUG
static uint32_t uClimate_Data[1000*500];
static uint32_t _aClimateColors[]=
{
0xff004000,
0xff004080,
0xff005090,
0xff808080,
0xff005000,
0xff006000,
0xff0060a0,
0xff909090,
0xff009000,
0xff00a000,
};
for (uint32_t i=0; i<1000*500; i++)
{
if ( (uHM_Data[i]&0xff) == 0 )
{
uClimate_Data[i] = 0xff200000;
//int I = (int)( Math::Min( m_afCoastalDist[i], 1.0f ) * 255.0f );
//uClimate_Data[i] = I | (I<<8) | (I<<16) | (0xff<<24);
}
else
{
uClimate_Data[i] = _aClimateColors[ m_pClimate[i]-223 ];
uint32_t R = uClimate_Data[i]&0xff;
uint32_t G = (uClimate_Data[i]>>8)&0xff;
uint32_t B = (uClimate_Data[i]>>16)&0xff;
uint32_t H = Math::clamp((uHM_Data[i]&0xff)*2, 0, 255);
R = (R * H)>>8;
G = (G * H)>>8;
B = (B * H)>>8;
uClimate_Data[i] = (0xff<<24) | R | (G<<8) | (B<<16);
//scale heightmap if in mountains?
if ( s_anMapClimate[m_pClimate[i]-223] == Terrain::CLIMATE_MOUNTAIN )
{
m_afHeightmap[i] *= 2.0f;
}
}
}
//now place locations on the map...
for (uint32_t r=0; r<WorldMap::m_uRegionCount; r++)
{
for (uint32_t l=0; l<WorldMap::m_pRegions[r].m_uLocationCount; l++)
{
int32_t x = (int32_t)(WorldMap::m_pRegions[r].m_pLocations[l].m_x/8.0f);
int32_t y = 499 - (int32_t)(WorldMap::m_pRegions[r].m_pLocations[l].m_y/8.0f);
assert(x >= 0 && x < 1000);
assert(y >= 0 && y < 500);
if ( WorldMap::m_pRegions[r].m_pLocations[l].m_BlockWidth || WorldMap::m_pRegions[r].m_pLocations[l].m_BlockHeight )
{
int32_t lumR = Math::Min( (WorldMap::m_pRegions[r].m_pLocations[l].m_BlockWidth*WorldMap::m_pRegions[r].m_pLocations[l].m_BlockHeight)<<2, 255 );
int32_t lumGB = Math::Min( lumR+64, 255 );
uClimate_Data[y*1000+x] = 0xff000000 | (lumGB<<16) | (lumGB<<8) | lumR;
}
else
{
uClimate_Data[y*1000+x] = 0xff00ffff;
}
}
}
m_hDebugClimate = m_pDriver->CreateTexture(1000, 500, IDriver3D::TEX_FORMAT_FORCE_32bpp, (uint8_t *)&uClimate_Data[0], false);
uint32_t uRed = 0xff000080, uDkRed = 0xff000040;
uint32_t auMarkerArr[] = { uDkRed, uDkRed, uDkRed, uDkRed, uRed, uDkRed, uDkRed, uDkRed, uDkRed, uDkRed };
m_hPosMarker = m_pDriver->CreateTexture(3, 3, IDriver3D::TEX_FORMAT_FORCE_32bpp, (uint8_t *)&auMarkerArr[0], false);
//debug ground texture.
uint32_t _groundTex[256*256];
Vector3 p(0.2f, 0.2f, 0.675f);
float delta = 8.0f/256.0f;
static const uint32_t colors[]=
{
0xff3c5c7b, 0xff25402d, 0xff636363
};
for (int32_t y=0; y<256; y++)
{
p.x = 0.2f;
for (int32_t x=0; x<256; x++)
{
float f = ProceduralFunc::fBm(p, 4);
int32_t I = (int32_t)Math::clamp(255.0f*(f*0.5f+0.5f), 0.0f, 255.0f);
int32_t index = Math::clamp( I/85, 0, 2 );
_groundTex[ y*256 + x ] = colors[index];
p.x += delta;
}
p.y += delta;
}
m_hDebugGroundTex = m_pDriver->CreateTexture(256, 256, IDriver3D::TEX_FORMAT_FORCE_32bpp, (uint8_t *)&_groundTex[0], false);
//
}
}
void Terrain::FilterHeightMap(uint8_t *pAltMap, float *pAltMapF, float *pCoastalDist)
{
static float afHeights0[1000*500];
static float afHeights1[1000*500];
int x, xx, y, yy, yOffs;
//Setup floats
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
afHeights0[yOffs+x] = (float)pAltMap[yOffs+x];
}
}
#if 1
//Fixup water ahead of time to help the filter...
//Handle water
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
if (pAltMap[yOffs+x] <= 2)
{
afHeights0[yOffs+x] = 0.0f;
}
else if ( x > 0 && pAltMap[yOffs+x-1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x < 999 && pAltMap[yOffs+x+1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( y > 0 && pAltMap[yOffs-1000+x] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( y < 499 && pAltMap[yOffs+1000+x] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x > 0 && y > 0 && pAltMap[yOffs-1000+x-1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x > 0 && y < 499 && pAltMap[yOffs+1000+x-1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x < 999 && y > 0 && pAltMap[yOffs-1000+x+1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x < 999 && y < 499 && pAltMap[yOffs+1000+x+1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
}
}
//kernel
float afKernel[] = { 1.0f, 1.0f, 2.0f, 4.0f, 8.0f, 4.0f, 2.0f, 1.0f, 1.0f };
float weight = 0.0f;
//Horizontal blur
for (int p=0; p<8; p++)
{
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
weight = 0.0f;
if (pAltMap[yOffs+x] <= 2)
{
afHeights1[yOffs+x] = afHeights0[yOffs+x];
}
else
{
afHeights1[yOffs+x] = 0.0f;
for (xx=x-4; xx<=x+4; xx++)
{
int u = xx;
u = (u < 0 ) ? 0 : u;
u = (u > 999) ? 999 : u;
if (pAltMap[yOffs+u] > 2)
{
afHeights1[yOffs+x] += afHeights0[yOffs+u] * afKernel[xx-x+4];
weight += afKernel[xx-x+4];
}
}
afHeights1[yOffs+x] /= weight;
}
}
}
//Vertical blur
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
weight = 0.0f;
if (pAltMap[yOffs+x] <= 2)
{
afHeights0[yOffs+x] = afHeights1[yOffs+x];
}
else
{
afHeights0[yOffs+x] = 0.0f;
for (yy=y-4; yy<=y+4; yy++)
{
int v = yy;
v = (v < 0 ) ? 0 : v;
v = (v > 499) ? 499 : v;
if (pAltMap[v*1000+x] > 2)
{
afHeights0[yOffs+x] += afHeights1[v*1000+x] * afKernel[yy-y+4];
weight += afKernel[yy-y+4];
}
}
afHeights0[yOffs+x] /= weight;
}
}
}
}
//Handle water
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
if (pAltMap[yOffs+x] <= 2)
{
afHeights0[yOffs+x] = 0.0f;
}
else if ( x > 0 && pAltMap[yOffs+x-1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x < 999 && pAltMap[yOffs+x+1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( y > 0 && pAltMap[yOffs-1000+x] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( y < 499 && pAltMap[yOffs+1000+x] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x > 0 && y > 0 && pAltMap[yOffs-1000+x-1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x > 0 && y < 499 && pAltMap[yOffs+1000+x-1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x < 999 && y > 0 && pAltMap[yOffs-1000+x+1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
else if ( x < 999 && y < 499 && pAltMap[yOffs+1000+x+1] <= 2 )
{
afHeights0[yOffs+x] = 1.0f;
}
}
}
//Now figure out how close we are to water and adjust the coastlines.
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
if (pAltMap[yy*1000+xx] <= 2)
{
continue;
}
for (int yy=y-3; yy<=y+3; yy++)
{
for (int xx=x-3; xx<=x+3; xx++)
{
if ( xx == x && yy == y ) continue;
if ( yy < 0 || xx < 0 || yy > 499 || xx > 999 ) continue;
if ( abs(xx-x) <= 1 && abs(yy-y)<=1 ) continue;
if (pAltMap[yy*1000+xx] <= 2)
{
float dx = (float)xx - (float)x;
float dy = (float)yy - (float)y;
float d = sqrtf(dx*dx + dy*dy);
float scale = (d-1.0f)*0.33f;
afHeights0[yOffs+x] = scale*afHeights0[yOffs+x] + (1.0f-scale)*1.0f;
}
}
}
}
}
//Figure out how close we are to the coastline.
//1. prime distance metric - either 0 for right next to land or 1.
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
//if land, just mark with 0.
if (pAltMap[y*1000+x] > 2)
{
pCoastalDist[yOffs+x] = 0.0f;
}
else
{
pCoastalDist[yOffs+x] = -1.0f;
}
}
}
//2. iteratively compute the approximate minimum distance.
static float afTemp[1000*500];
float *pTemp = &afTemp[0];
int passCnt = 32;
float deltaDist = 1.0f / (float)passCnt;
float *pRead = pCoastalDist;
float *pWrite = pTemp;
for (int p=0; p<passCnt; p++)
{
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
//if already filled in, continue
if (pRead[yOffs+x] > -1)
{
//just copy over the value.
pWrite[yOffs+x] = pRead[yOffs+x];
continue;
}
//otherwise determine the iterative distance.
float minDist = 1000.0f;
int fx, fy;
for (int yy=Math::Max(y-1,0); yy<=Math::Min(y+1,499); yy++)
{
for (int xx=Math::Max(x-1,0); xx<=Math::Min(x+1,999); xx++)
{
float d = pRead[yy*1000+xx];
if ( d > -1 && d < minDist )
{
fx = xx;
fy = yy;
minDist = d;
}
}
}
if ( minDist < 1000.0f )
{
float fDistScale = 1.0f;
if ( fx && fy && x < 500 )
{
//scale distance by diagonal...
fDistScale = 1.41421356237f;
}
pWrite[yOffs+x] = Math::Min( minDist + deltaDist*fDistScale, 1.0f );
}
else
{
pWrite[yOffs+x] = -1.0f;
}
}
}
//swap buffers.
float *pSwap = pRead;
pRead = pWrite;
pWrite = pSwap;
}
//3. finally fill the rest with the maximum distance.
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
if (pCoastalDist[yOffs+x] < 0)
{
pCoastalDist[yOffs+x] = 1.0f;
}
}
}
#endif
//Write the data back... (or keep as float?)
float max_height = 0.0f;
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
pAltMapF[yOffs+x] = afHeights0[yOffs+x]*64.0f;
if ( pAltMapF[yOffs+x] > max_height ) { max_height = pAltMapF[yOffs+x]; }
}
}
#if 0
//Generate the normalmap.
for (y=0, yOffs=0; y<500; y++, yOffs+=1000)
{
for (x=0; x<1000; x++)
{
int xm1 = x-1; if ( xm1 < 0 ) xm1 = 0;
int xp1 = x+1; if ( xp1 > 999) xp1 = 999;
int ym1 = y-1; if ( ym1 < 0 ) ym1 = 0;
int yp1 = y+1; if ( yp1 > 499) yp1 = 499;
float s00 = pAltMapF[(ym1)*1000+xm1];
float s01 = pAltMapF[(ym1)*1000+x];
float s02 = pAltMapF[(ym1)*1000+xp1];
float s10 = pAltMapF[(y)*1000+xm1];
float s12 = pAltMapF[(y)*1000+xp1];
float s20 = pAltMapF[(yp1)*1000+xm1];
float s21 = pAltMapF[(yp1)*1000+x];
float s22 = pAltMapF[(yp1)*1000+xp1];
float sobelX = s00 + 2.0f*s10 + s20 - s02 - 2.0f*s12 - s22;
float sobelY = s00 + 2.0f*s01 + s02 - s20 - 2.0f*s21 - s22;
Vector3 nrml(sobelX, sobelY, 128.0f);
nrml.Normalize();
pvNrmlMap[y*1000+x] = nrml;
}
}
#endif
}
void Terrain::AddDynamicObject(uint32_t uID)
{
m_pSector->AddObject( uID );
}
void Terrain::SetHeightmap(int32_t width, int32_t height, uint8_t *pData, float fScale, float fBias)
{
m_nWidth = width;
m_nHeight = height;
m_afHeightmap = xlNew float[width*height];
m_afCoastalDist = xlNew float[width*height];
fScale *= (1.0f/255.0f); //convert from 8 bit to float.
for (int i=0; i<m_nWidth*m_nHeight; i++)
{
m_afHeightmap[i] = (float)pData[i] * fScale + fBias;
}
}
//Whether the terrain is currently active or not.
//If its not active, then no rendering or collision takes place.
void Terrain::Activate(bool bActive)
{
m_bActive = bActive;
}
//Update the terrain mesh and texturing based on the world position.
bool Terrain::Update(int32_t x, int32_t y, int32_t nRectCnt, LocationRect *pRects)
{
bool bUpdateNeeded = false;
if ( !m_bActive )
{
return false;
}
if ( !m_bMeshBuilt )
{
BinLocations();
LoadHeightmap();
BuildTerrainMeshes();
GenTextureTileMapping();
m_bMeshBuilt = true;
}
if ( (m_x != x || m_y != y) && x > -1 && y > -1 )
{
BuildHeightmap(x, y, m_x, m_y, nRectCnt, pRects);
bUpdateNeeded = true;
}
Animate();
m_pSector->m_x = m_x;
m_pSector->m_y = m_y;
if ( m_bShowTerrainDebug && !Input::IsKeyDown(XL_SHIFT) )
{
if ( Input::IsKeyDown(XL_LEFT) )
{
m_nTerrainMapX++;
}
else if ( Input::IsKeyDown(XL_RIGHT) )
{
m_nTerrainMapX--;
}
if ( Input::IsKeyDown(XL_UP) )
{
m_nTerrainMapY++;
}
else if ( Input::IsKeyDown(XL_DOWN) )
{
m_nTerrainMapY--;
}
}
return bUpdateNeeded;
}
void Terrain::RenderSky(int32_t skyIndex, int32_t timeIndex, Camera *pCamera)
{
m_pSkyLoader->LoadSky(skyIndex);
SkyData *pSkyData = (SkyData *)m_pSkyLoader->GetSkyData(skyIndex);
if ( !pSkyData )
return;
pCamera->Compute(0.4f, true);
pCamera->Set(m_pDriver, false);
TextureLoader::SetPalette(8, pSkyData->aPalettes[timeIndex].colors, 768, 0);
TextureLoader::SetColormap(4, pSkyData->aColormaps[timeIndex].data, pSkyData->aColormaps[timeIndex].lightLevels);
m_pDriver->SetClearColorFromTex(pSkyData->ahTexEast[timeIndex]);
m_pDriver->SetCurrentPalette(8, true);
m_pDriver->SetCurrentColormap(4);
m_pDriver->SetAmbient(1.0f);
TextureHandle ahTex[] = { pSkyData->ahTexEast[timeIndex], pSkyData->ahTexWest[timeIndex], pSkyData->ahTexWest[timeIndex], pSkyData->ahTexWest[timeIndex] };
//Render Sky Cylinder...
const int32_t cylinderCnt = 32;
float dA = MATH_TWO_PI / (float)cylinderCnt;
float A = 0.0f;
float x0 = cosf(A);
float y0 = -sinf(A);
float x1, y1;
A += dA;
Vector3 posList[4];
Vector2 uvList[4];
uint32_t uSkyTexCnt = 4;
uvList[0].Set( 0.01f, 0.99f );
uvList[1].Set( 0.99f, 0.99f );
uvList[2].Set( 0.99f, 0.01f );
uvList[3].Set( 0.01f, 0.01f );
float topScale = 0.5f;
float cylTaper = 100.0f * topScale;
const Vector3& vLoc = m_vCamLoc;
float zTop = vLoc.z + m_fSkyTop*topScale;
float zBot = vLoc.z + m_fSkyBot;
uint32_t uDiv = cylinderCnt/uSkyTexCnt;
float fWidth = 1.0f/(float)uDiv;
for (uint32_t s=0; s<cylinderCnt; s++)
{
uint32_t idx = s%uDiv;
float fStart = (float)idx * fWidth;
uvList[0].x = fStart;
uvList[1].x = fStart + fWidth;
uvList[2].x = fStart + fWidth;
uvList[3].x = fStart;
x1 = cosf(A);
y1 = -sinf(A);
posList[0].Set( vLoc.x+x0*100.0f, vLoc.y+y0*100.0f, zBot );
posList[1].Set( vLoc.x+x1*100.0f, vLoc.y+y1*100.0f, zBot );
posList[2].Set( vLoc.x+x1*cylTaper, vLoc.y+y1*cylTaper, zTop );
posList[3].Set( vLoc.x+x0*cylTaper, vLoc.y+y0*cylTaper, zTop );
TextureHandle hTex = ahTex[s/uDiv];
m_pDriver->SetTexture(0, hTex);
A += dA;
x0 = x1;
y0 = y1;
m_pDriver->RenderWorldQuad(posList, uvList, Vector4::One);
}
m_pDriver->SetTexture(0, 0);
pCamera->Compute(1.0f, true);
pCamera->Set(m_pDriver);
m_pDriver->SetAmbient(0.75f*195.0f/255.0f);
}
//Render the terrain.
void Terrain::Render(Camera *pCamera)
{
if ( !m_bActive || !m_bMeshBuilt || m_x < 0 || m_y < 0 )
{
return;
}
m_vCamLoc = pCamera->GetLoc();
m_vCamDir = pCamera->GetDir();
if ( m_bShowTerrainDebug )
{
int32_t x = (m_nTerrainMapX-500)*m_nTerrainMapScale + 500;
int32_t y = (m_nTerrainMapY-250)*m_nTerrainMapScale + 250;
m_pDriver->AddOverlay(x, y, m_nTerrainMapScale, m_hDebugClimate);
if ( m_x >= 0 && m_y >= 0 )
{
int32_t px = m_nTerrainMapX + ( (m_x+8)>>3 );
int32_t py = m_nTerrainMapY + ( 499 - ((m_y-8)>>3) );
px = (px-500)*m_nTerrainMapScale + 500 - 1;
py = (py-250)*m_nTerrainMapScale + 250 - 1;
m_pDriver->AddOverlay(px, py, 1, m_hPosMarker);
}
}
else
{
m_pDriver->ForceMipmapping(false);
int32_t skyIndex = GetSkyIndex(7, 7);
m_pDriver->EnableFog(false);
RenderSky(skyIndex, 20, pCamera);
m_pDriver->Clear(false);
m_pDriver->EnableFog(true, 8000.0f);
//test.
extern float m_fZRange;
m_pDriver->ForceMipmapping(true);
int32_t bEnable = 1;
m_pDriver->SetExtension_Data( IDriver3D::EXT_GOURAUD, &bEnable, nullptr);
//m_fZRange = 8000.0f * 4.0f;
//m_pDriver->EnableFog(true, 8000.0f * 4.0f);
//RenderLOD(pCamera, 1);
//m_pDriver->EnableFog(false);
//m_pDriver->Clear(false);
m_fZRange = 8000.0f;
pCamera->SetMaxRenderDistance( 8000.0f );
RenderLOD(pCamera, 0);
//pCamera->SetMaxRenderDistance( 400.0f );
m_pDriver->EnableFog(true, 400.0f);
bEnable = 0;
m_pDriver->SetExtension_Data( IDriver3D::EXT_GOURAUD, &bEnable, nullptr);
m_pDriver->ForceMipmapping(false);
}
}
bool Terrain::IsPointInWater(float xPos, float yPos)
{
xPos = (xPos - c_startPos.x) / 64.0f;
yPos = (yPos - c_startPos.y) / 64.0f;
if ( xPos < 0 ) xPos = 0;
if ( yPos < 0 ) yPos = 0;
if ( xPos > c_numVertexEdge-1) xPos = c_numVertexEdge-1;
if ( yPos > c_numVertexEdge-1) yPos = c_numVertexEdge-1;