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colobot/src/graphics/engine/terrain.cpp

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// * This file is part of the COLOBOT source code
// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
// * Copyright (C) 2012, Polish Portal of Colobot (PPC)
// *
// * This program is free software: you can redistribute it and/or modify
// * it under the terms of the GNU General Public License as published by
// * the Free Software Foundation, either version 3 of the License, or
// * (at your option) any later version.
// *
// * This program is distributed in the hope that it will be useful,
// * but WITHOUT ANY WARRANTY; without even the implied warranty of
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// * GNU General Public License for more details.
// *
// * You should have received a copy of the GNU General Public License
// * along with this program. If not, see http://www.gnu.org/licenses/.
#include "graphics/engine/terrain.h"
#include "app/app.h"
#include "common/iman.h"
#include "common/image.h"
#include "common/logger.h"
#include "graphics/engine/engine.h"
#include "graphics/engine/water.h"
#include "math/geometry.h"
#include <sstream>
#include <SDL/SDL.h>
// Graphics module namespace
namespace Gfx {
const int LEVEL_MAT_PREALLOCATE_COUNT = 101;
const int FLYING_LIMIT_PREALLOCATE_COUNT = 10;
const int BUILDING_LEVEL_PREALLOCATE_COUNT = 101;
CTerrain::CTerrain(CInstanceManager* iMan)
{
m_iMan = iMan;
m_iMan->AddInstance(CLASS_TERRAIN, this);
m_engine = static_cast<CEngine*>( m_iMan->SearchInstance(CLASS_ENGINE) );
m_water = static_cast<CWater*>( m_iMan->SearchInstance(CLASS_WATER) );
m_mosaicCount = 20;
m_brickCount = 1 << 4;
m_brickSize = 10.0f;
m_vision = 200.0f;
m_textureScale = 0.01f;
m_scaleRelief = 1.0f;
m_textureSubdivCount = 1;
m_depth = 2;
m_maxMaterialID = 0;
m_wind = Math::Vector(0.0f, 0.0f, 0.0f);
m_defaultHardness = 0.5f;
m_useMaterials = false;
m_materials.reserve(LEVEL_MAT_PREALLOCATE_COUNT);
m_flyingLimits.reserve(FLYING_LIMIT_PREALLOCATE_COUNT);
m_buildingLevels.reserve(BUILDING_LEVEL_PREALLOCATE_COUNT);
FlushBuildingLevel();
FlushFlyingLimit();
FlushMaterials();
}
CTerrain::~CTerrain()
{
}
bool CTerrain::Generate(int mosaicCount, int brickCountPow2, float brickSize,
float vision, int depth, float hardness)
{
m_mosaicCount = mosaicCount;
m_brickCount = 1 << brickCountPow2;
m_brickSize = brickSize;
m_vision = vision;
m_depth = depth;
m_defaultHardness = hardness;
m_engine->SetTerrainVision(vision);
m_textureScale = 1.0f / (m_brickCount*m_brickSize);
m_textureSubdivCount = 1;
m_useMaterials = false;
int dim = 0;
dim = (m_mosaicCount*m_brickCount+1)*(m_mosaicCount*m_brickCount+1);
std::vector<float>(dim).swap(m_relief);
dim = m_mosaicCount*m_textureSubdivCount*m_mosaicCount*m_textureSubdivCount;
std::vector<int>(dim).swap(m_textures);
dim = m_mosaicCount*m_mosaicCount;
std::vector<int>(dim).swap(m_objRanks);
return true;
}
int CTerrain::GetMosaicCount()
{
return m_mosaicCount;
}
int CTerrain::GetBrickCount()
{
return m_brickCount;
}
float CTerrain::GetBrickSize()
{
return m_brickSize;
}
float CTerrain::GetReliefScale()
{
return m_scaleRelief;
}
bool CTerrain::InitTextures(const std::string& baseName, int* table, int dx, int dy)
{
m_useMaterials = false;
m_texBaseName = baseName;
size_t pos = baseName.find('.');
if (pos == std::string::npos)
{
m_texBaseExt = ".png";
}
else
{
m_texBaseExt = m_texBaseName.substr(pos);
m_texBaseName = m_texBaseName.substr(0, pos);
}
for (int y = 0; y < m_mosaicCount*m_textureSubdivCount; y++)
{
for (int x = 0; x < m_mosaicCount*m_textureSubdivCount; x++)
{
m_textures[x+y*m_mosaicCount] = table[(x%dx)+(y%dy)*dx];
}
}
return true;
}
void CTerrain::FlushMaterials()
{
m_materials.clear();
m_maxMaterialID = 0;
m_materialAutoID = 1000;
FlushMaterialPoints();
}
void CTerrain::AddMaterial(int id, const std::string& texName, const Math::Point &uv,
int up, int right, int down, int left,
float hardness)
{
InitMaterialPoints();
if (id == 0)
id = m_materialAutoID++;
TerrainMaterial tm;
tm.texName = texName;
tm.id = id;
tm.uv = uv;
tm.mat[0] = up;
tm.mat[1] = right;
tm.mat[2] = down;
tm.mat[3] = left;
tm.hardness = hardness;
m_materials.push_back(tm);
if (m_maxMaterialID < up+1 ) m_maxMaterialID = up+1;
if (m_maxMaterialID < right+1) m_maxMaterialID = right+1;
if (m_maxMaterialID < down+1 ) m_maxMaterialID = down+1;
if (m_maxMaterialID < left+1 ) m_maxMaterialID = left+1;
m_useMaterials = true;
m_textureSubdivCount = 4;
}
/**
* The image must be 24 bits/pixel and grayscale and dx x dy in size
* with dx = dy = (mosaic*brick)+1 */
bool CTerrain::LoadResources(const std::string& fileName)
{
CImage img;
std::string path = CApplication::GetInstance().GetDataFilePath(DIR_TEXTURE, fileName);
if (! img.Load(path))
{
GetLogger()->Error("Cannot load resource file: '%s'\n", path.c_str());
return false;
}
ImageData *data = img.GetData();
int size = (m_mosaicCount*m_brickCount)+1;
m_resources.clear();
std::vector<unsigned char>(3*size*size).swap(m_resources);
if ( (data->surface->w != size) || (data->surface->h != size) ||
(data->surface->format->BytesPerPixel != 3) )
{
GetLogger()->Error("Invalid resource file\n");
return false;
}
unsigned char* pixels = static_cast<unsigned char*>(data->surface->pixels);
int pitch = data->surface->pitch;
for (int y = 0; y < size; y++)
{
memcpy(&m_resources[3*size*y], &pixels[pitch*y], 3*size);
}
return true;
}
TerrainRes CTerrain::GetResource(const Math::Vector &p)
{
if (m_resources.empty())
return TR_NULL;
int x = static_cast<int>((p.x + (m_mosaicCount*m_brickCount*m_brickSize)/2.0f)/m_brickSize);
int y = static_cast<int>((p.z + (m_mosaicCount*m_brickCount*m_brickSize)/2.0f)/m_brickSize);
if ( x < 0 || x > m_mosaicCount*m_brickCount ||
y < 0 || y > m_mosaicCount*m_brickCount )
return TR_NULL;
int size = (m_mosaicCount*m_brickCount)+1;
int resR = m_resources[3*x+3*size*(size-y-1)];
int resG = m_resources[3*x+3*size*(size-y-1)+1];
int resB = m_resources[3*x+3*size*(size-y-1)+2];
if (resR == 255 && resG == 0 && resB == 0) return TR_STONE;
if (resR == 255 && resG == 255 && resB == 0) return TR_URANIUM;
if (resR == 0 && resG == 255 && resB == 0) return TR_POWER;
// TODO key res values
//if (ress == 24) return TR_KEY_A; // ~green?
//if (ress == 25) return TR_KEY_B; // ~green?
//if (ress == 26) return TR_KEY_C; // ~green?
//if (ress == 27) return TR_KEY_D; // ~green?
return TR_NULL;
}
void CTerrain::FlushRelief()
{
m_relief.clear();
}
/**
* The image must be 24 bits/pixel and dx x dy in size
* with dx = dy = (mosaic*brick)+1 */
bool CTerrain::LoadRelief(const std::string &fileName, float scaleRelief,
bool adjustBorder)
{
m_scaleRelief = scaleRelief;
CImage img;
std::string path = CApplication::GetInstance().GetDataFilePath(DIR_TEXTURE, fileName);
if (! img.Load(path))
{
GetLogger()->Error("Could not load relief file: '%s'!\n", path.c_str());
return false;
}
ImageData *data = img.GetData();
int size = (m_mosaicCount*m_brickCount)+1;
if ( (data->surface->w != size) || (data->surface->h != size) ||
(data->surface->format->BytesPerPixel != 3) )
{
GetLogger()->Error("Invalid relief file!\n");
return false;
}
unsigned char* pixels = static_cast<unsigned char*>(data->surface->pixels);
int pitch = data->surface->pitch;
float limit = 0.9f;
for (int y = 0; y < size; y++)
{
for (int x = 0; x < size; x++)
{
float level = (255 - pixels[3*x+pitch*(size-y-1)]) * scaleRelief;
float dist = Math::Max(fabs(static_cast<float>(x-size/2)),
fabs(static_cast<float>(y-size/2)));
dist = dist/ static_cast<float>(size / 2);
if (dist > limit && adjustBorder)
{
dist = (dist-limit)/(1.0f-limit); // 0..1
if (dist > 1.0f) dist = 1.0f;
float border = 300.0f+Math::Rand()*20.0f;
level = level+dist*(border-level);
}
m_relief[x+y*size] = level;
}
}
return true;
}
bool CTerrain::AddReliefPoint(Math::Vector pos, float scaleRelief)
{
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int size = (m_mosaicCount*m_brickCount)+1;
pos.x = (pos.x+dim)/m_brickSize;
pos.z = (pos.z+dim)/m_brickSize;
int x = static_cast<int>(pos.x);
int y = static_cast<int>(pos.z);
if ( x < 0 || x >= size ||
y < 0 || y >= size ) return false;
if (m_relief[x+y*size] < pos.y*scaleRelief)
m_relief[x+y*size] = pos.y*scaleRelief;
return true;
}
void CTerrain::AdjustRelief()
{
if (m_depth == 1) return;
int ii = m_mosaicCount*m_brickCount+1;
int b = 1 << (m_depth-1);
for (int y = 0; y < m_mosaicCount*m_brickCount; y += b)
{
for (int x = 0; x < m_mosaicCount*m_brickCount; x += b)
{
int xx = 0;
int yy = 0;
if ((y+yy)%m_brickCount == 0)
{
float level1 = m_relief[(x+0)+(y+yy)*ii];
float level2 = m_relief[(x+b)+(y+yy)*ii];
for (xx = 1; xx < b; xx++)
{
m_relief[(x+xx)+(y+yy)*ii] = ((level2-level1)/b)*xx+level1;
}
}
yy = b;
if ((y+yy)%m_brickCount == 0)
{
float level1 = m_relief[(x+0)+(y+yy)*ii];
float level2 = m_relief[(x+b)+(y+yy)*ii];
for (xx = 1; xx < b; xx++)
{
m_relief[(x+xx)+(y+yy)*ii] = ((level2-level1)/b)*xx+level1;
}
}
xx = 0;
if ((x+xx)%m_brickCount == 0)
{
float level1 = m_relief[(x+xx)+(y+0)*ii];
float level2 = m_relief[(x+xx)+(y+b)*ii];
for (yy = 1; yy < b; yy++)
{
m_relief[(x+xx)+(y+yy)*ii] = ((level2-level1)/b)*yy+level1;
}
}
xx = b;
if ((x+xx)%m_brickCount == 0)
{
float level1 = m_relief[(x+xx)+(y+0)*ii];
float level2 = m_relief[(x+xx)+(y+b)*ii];
for (yy = 1; yy < b; yy++)
{
m_relief[(x+xx)+(y+yy)*ii] = ((level2-level1)/b)*yy+level1;
}
}
}
}
}
Math::Vector CTerrain::GetVector(int x, int y)
{
Math::Vector p;
p.x = x*m_brickSize - (m_mosaicCount*m_brickCount*m_brickSize) / 2.0;
p.z = y*m_brickSize - (m_mosaicCount*m_brickCount*m_brickSize) / 2.0;
if ( !m_relief.empty() &&
x >= 0 && x <= m_mosaicCount*m_brickCount &&
y >= 0 && y <= m_mosaicCount*m_brickCount )
{
p.y = m_relief[x+y*(m_mosaicCount*m_brickCount+1)];
}
else
{
p.y = 0.0f;
}
return p;
}
/** Calculates an averaged normal, taking into account the six adjacent triangles:
\verbatim
^ y
|
b---c---+
|\ |\ |
| \| \|
a---o---d
|\ |\ |
| \| \|
+---f---e--> x
\endverbatim */
VertexTex2 CTerrain::GetVertex(int x, int y, int step)
{
VertexTex2 v;
Math::Vector o = GetVector(x, y);
v.coord = o;
Math::Vector a = GetVector(x-step, y );
Math::Vector b = GetVector(x-step, y+step);
Math::Vector c = GetVector(x, y+step);
Math::Vector d = GetVector(x+step, y );
Math::Vector e = GetVector(x+step, y-step);
Math::Vector f = GetVector(x, y-step);
Math::Vector s(0.0f, 0.0f, 0.0f);
if (x-step >= 0 && y+step <= m_mosaicCount*m_brickCount+1)
{
s += Math::NormalToPlane(b,a,o);
s += Math::NormalToPlane(c,b,o);
}
if (x+step <= m_mosaicCount*m_brickCount+1 && y+step <= m_mosaicCount*m_brickCount+1)
s += Math::NormalToPlane(d,c,o);
if (x+step <= m_mosaicCount*m_brickCount+1 && y-step >= 0)
{
s += Math::NormalToPlane(e,d,o);
s += Math::NormalToPlane(f,e,o);
}
if (x-step >= 0 && y-step >= 0)
s += Math::NormalToPlane(a,f,o);
s = Normalize(s);
v.normal = s;
int brick = m_brickCount/m_textureSubdivCount;
Math::Vector oo = GetVector((x/brick)*brick, (y/brick)*brick);
o = GetVector(x, y);
v.texCoord.x = (o.x-oo.x)*m_textureScale*m_textureSubdivCount;
v.texCoord.y = 1.0f - (o.z-oo.z)*m_textureScale*m_textureSubdivCount;
return v;
}
/** The origin of mosaic is its center.
\verbatim
^ z
|
| 2---4---6--
| |\ |\ |\
| | \| \|
| 1---3---5--- ...
|
+-------------------> x
\endverbatim */
bool CTerrain::CreateMosaic(int ox, int oy, int step, int objRank,
const Material &mat,
float min, float max)
{
std::string texName1;
std::string texName2;
if ( step == 1 && m_engine->GetGroundSpot() )
{
int i = (ox/5) + (oy/5)*(m_mosaicCount/5);
std::stringstream s;
s << "shadow";
s.width(2);
s.fill('0');
s << i;
s << ".png";
texName2 = s.str();
}
int brick = m_brickCount/m_textureSubdivCount;
VertexTex2 o = GetVertex(ox*m_brickCount+m_brickCount/2, oy*m_brickCount+m_brickCount/2, step);
int total = ((brick/step)+1)*2;
float pixel = 1.0f/256.0f; // 1 pixel cover (*)
float dp = 1.0f/512.0f;
Math::Point uv;
for (int my = 0; my < m_textureSubdivCount; my++)
{
for (int mx = 0; mx < m_textureSubdivCount; mx++)
{
if (m_useMaterials)
{
int xx = ox*m_brickCount + mx*(m_brickCount/m_textureSubdivCount);
int yy = oy*m_brickCount + my*(m_brickCount/m_textureSubdivCount);
GetTexture(xx, yy, texName1, uv);
}
else
{
int i = (ox*m_textureSubdivCount+mx)+(oy*m_textureSubdivCount+my)*m_mosaicCount;
std::stringstream s;
s << m_texBaseName;
s.width(3);
s.fill('0');
s << m_textures[i];
s << m_texBaseExt;
texName1 = s.str();
}
for (int y = 0; y < brick; y += step)
{
EngineObjLevel4 buffer;
buffer.vertices.reserve(total);
buffer.type = ENG_TRIANGLE_TYPE_SURFACE;
buffer.material = mat;
buffer.state = ENG_RSTATE_WRAP;
buffer.state |= ENG_RSTATE_SECOND;
if (step == 1)
buffer.state |= ENG_RSTATE_DUAL_BLACK;
for (int x = 0; x <= brick; x += step)
{
VertexTex2 p1 = GetVertex(ox*m_brickCount+mx*brick+x, oy*m_brickCount+my*brick+y+0 , step);
VertexTex2 p2 = GetVertex(ox*m_brickCount+mx*brick+x, oy*m_brickCount+my*brick+y+step, step);
p1.coord.x -= o.coord.x; p1.coord.z -= o.coord.z;
p2.coord.x -= o.coord.x; p2.coord.z -= o.coord.z;
if (x == 0)
{
p1.texCoord.x = 0.0f+(0.5f/256.0f);
p2.texCoord.x = 0.0f+(0.5f/256.0f);
}
if (x == brick)
{
p1.texCoord.x = 1.0f-(0.5f/256.0f);
p2.texCoord.x = 1.0f-(0.5f/256.0f);
}
if (y == 0)
p1.texCoord.y = 1.0f-(0.5f/256.0f);
if (y == brick - step)
p2.texCoord.y = 0.0f+(0.5f/256.0f);
if (m_useMaterials)
{
p1.texCoord.x /= m_textureSubdivCount; // 0..1 -> 0..0.25
p1.texCoord.y /= m_textureSubdivCount;
p2.texCoord.x /= m_textureSubdivCount;
p2.texCoord.y /= m_textureSubdivCount;
if (x == 0)
{
p1.texCoord.x = 0.0f+dp;
p2.texCoord.x = 0.0f+dp;
}
if (x == brick)
{
p1.texCoord.x = (1.0f/m_textureSubdivCount)-dp;
p2.texCoord.x = (1.0f/m_textureSubdivCount)-dp;
}
if (y == 0)
p1.texCoord.y = (1.0f/m_textureSubdivCount)-dp;
if (y == brick - step)
p2.texCoord.y = 0.0f+dp;
p1.texCoord.x += uv.x;
p1.texCoord.y += uv.y;
p2.texCoord.x += uv.x;
p2.texCoord.y += uv.y;
}
int xx = mx*(m_brickCount/m_textureSubdivCount) + x;
int yy = my*(m_brickCount/m_textureSubdivCount) + y;
p1.texCoord2.x = (static_cast<float>(ox%5)*m_brickCount+xx+0.0f)/(m_brickCount*5);
p1.texCoord2.y = (static_cast<float>(oy%5)*m_brickCount+yy+0.0f)/(m_brickCount*5);
p2.texCoord2.x = (static_cast<float>(ox%5)*m_brickCount+xx+0.0f)/(m_brickCount*5);
p2.texCoord2.y = (static_cast<float>(oy%5)*m_brickCount+yy+1.0f)/(m_brickCount*5);
// Correction for 1 pixel cover
// There is 1 pixel cover around each of the 16 surfaces:
//
// |<--------------256-------------->|
// | |<----------254---------->| |
// |---|---|---|-- ... --|---|---|---|
// | 0.0 1.0 |
// | | | |
// 0.0 min max 1.0
//
// The uv coordinates used for texturing are between min and max (instead of 0 and 1)
// This allows to exclude the pixels situated in a margin of a pixel around the surface
p1.texCoord2.x = (p1.texCoord2.x+pixel)*(1.0f-pixel)/(1.0f+pixel);
p1.texCoord2.y = (p1.texCoord2.y+pixel)*(1.0f-pixel)/(1.0f+pixel);
p2.texCoord2.x = (p2.texCoord2.x+pixel)*(1.0f-pixel)/(1.0f+pixel);
p2.texCoord2.y = (p2.texCoord2.y+pixel)*(1.0f-pixel)/(1.0f+pixel);
buffer.vertices.push_back(p1);
buffer.vertices.push_back(p2);
}
m_engine->AddQuick(objRank, buffer, texName1, texName2, min, max, true);
}
}
}
Math::Matrix transform;
transform.LoadIdentity();
transform.Set(1, 4, o.coord.x);
transform.Set(3, 4, o.coord.z);
m_engine->SetObjectTransform(objRank, transform);
return true;
}
TerrainMaterial* CTerrain::FindMaterial(int id)
{
for (int i = 0; i < static_cast<int>( m_materials.size() ); i++)
{
if (id == m_materials[i].id)
return &m_materials[i];
}
return nullptr;
}
void CTerrain::GetTexture(int x, int y, std::string& name, Math::Point &uv)
{
x /= m_brickCount/m_textureSubdivCount;
y /= m_brickCount/m_textureSubdivCount;
TerrainMaterial* tm = FindMaterial(m_materialPoints[x+y*m_materialPointCount].id);
if (tm == nullptr)
{
name = "";
uv = Math::Point(0.0f, 0.0f);
}
else
{
name = tm->texName;
uv = tm->uv;
}
}
float CTerrain::GetHeight(int x, int y)
{
int size = (m_mosaicCount*m_brickCount+1);
if (x < 0 ) x = 0;
if (x >= size) x = size-1;
if (y < 0 ) y = 0;
if (y >= size) y = size-1;
return m_relief[x+y*size];
}
bool CTerrain::CheckMaterialPoint(int x, int y, float min, float max, float slope)
{
float hc = GetHeight(x, y);
float h[4] =
{
GetHeight(x+0, y+1),
GetHeight(x+1, y+0),
GetHeight(x+0, y-1),
GetHeight(x-1, y+0)
};
if (hc < min || hc > max)
return false;
if (slope == 0.0f)
return true;
if (slope > 0.0f)
{
for (int i = 0; i < 4; i++)
{
if (fabs(hc - h[i]) >= slope)
return false;
}
return true;
}
if (slope < 0.0f)
{
for (int i = 0; i < 4; i++)
{
if (fabs(hc - h[i]) < -slope)
return false;
}
return true;
}
return false;
}
int CTerrain::FindMaterialByNeighbors(char *mat)
{
for (int i = 0; i < static_cast<int>( m_materials.size() ); i++)
{
if ( m_materials[i].mat[0] == mat[0] &&
m_materials[i].mat[1] == mat[1] &&
m_materials[i].mat[2] == mat[2] &&
m_materials[i].mat[3] == mat[3] ) return i;
}
return -1;
}
void CTerrain::SetMaterialPoint(int x, int y, int id, char *mat)
{
TerrainMaterial* tm = FindMaterial(id);
if (tm == nullptr) return;
if ( tm->mat[0] != mat[0] ||
tm->mat[1] != mat[1] ||
tm->mat[2] != mat[2] ||
tm->mat[3] != mat[3] ) // id incompatible with mat?
{
int ii = FindMaterialByNeighbors(mat);
if (ii == -1) return;
id = m_materials[ii].id; // looking for a id compatible with mat
}
// Changes the point
m_materialPoints[x+y*m_materialPointCount].id = id;
m_materialPoints[x+y*m_materialPointCount].mat[0] = mat[0];
m_materialPoints[x+y*m_materialPointCount].mat[1] = mat[1];
m_materialPoints[x+y*m_materialPointCount].mat[2] = mat[2];
m_materialPoints[x+y*m_materialPointCount].mat[3] = mat[3];
// Changes the lower neighbor
if ( (x+0) >= 0 && (x+0) < m_materialPointCount &&
(y-1) >= 0 && (y-1) < m_materialPointCount )
{
int i = (x+0)+(y-1)*m_materialPointCount;
if (m_materialPoints[i].mat[0] != mat[2])
{
m_materialPoints[i].mat[0] = mat[2];
int ii = FindMaterialByNeighbors(m_materialPoints[i].mat);
if (ii != -1)
m_materialPoints[i].id = m_materials[ii].id;
}
}
// Modifies the left neighbor
if ( (x-1) >= 0 && (x-1) < m_materialPointCount &&
(y+0) >= 0 && (y+0) < m_materialPointCount )
{
int i = (x-1)+(y+0)*m_materialPointCount;
if (m_materialPoints[i].mat[1] != mat[3])
{
m_materialPoints[i].mat[1] = mat[3];
int ii = FindMaterialByNeighbors(m_materialPoints[i].mat);
if (ii != -1)
m_materialPoints[i].id = m_materials[ii].id;
}
}
// Changes the upper neighbor
if ( (x+0) >= 0 && (x+0) < m_materialPointCount &&
(y+1) >= 0 && (y+1) < m_materialPointCount )
{
int i = (x+0)+(y+1)*m_materialPointCount;
if (m_materialPoints[i].mat[2] != mat[0])
{
m_materialPoints[i].mat[2] = mat[0];
int ii = FindMaterialByNeighbors(m_materialPoints[i].mat);
if (ii != -1)
m_materialPoints[i].id = m_materials[ii].id;
}
}
// Changes the right neighbor
if ( (x+1) >= 0 && (x+1) < m_materialPointCount &&
(y+0) >= 0 && (y+0) < m_materialPointCount )
{
int i = (x+1)+(y+0)*m_materialPointCount;
if ( m_materialPoints[i].mat[3] != mat[1] )
{
m_materialPoints[i].mat[3] = mat[1];
int ii = FindMaterialByNeighbors(m_materialPoints[i].mat);
if (ii != -1)
m_materialPoints[i].id = m_materials[ii].id;
}
}
}
bool CTerrain::CondChangeMaterialPoint(int x, int y, int id, char *mat)
{
char test[4];
// Compatible with lower neighbor?
if ( x+0 >= 0 && x+0 < m_materialPointCount &&
y-1 >= 0 && y-1 < m_materialPointCount )
{
test[0] = mat[2];
test[1] = m_materialPoints[(x+0)+(y-1)*m_materialPointCount].mat[1];
test[2] = m_materialPoints[(x+0)+(y-1)*m_materialPointCount].mat[2];
test[3] = m_materialPoints[(x+0)+(y-1)*m_materialPointCount].mat[3];
if ( FindMaterialByNeighbors(test) == -1 ) return false;
}
// Compatible with left neighbor?
if ( x-1 >= 0 && x-1 < m_materialPointCount &&
y+0 >= 0 && y+0 < m_materialPointCount )
{
test[0] = m_materialPoints[(x-1)+(y+0)*m_materialPointCount].mat[0];
test[1] = mat[3];
test[2] = m_materialPoints[(x-1)+(y+0)*m_materialPointCount].mat[2];
test[3] = m_materialPoints[(x-1)+(y+0)*m_materialPointCount].mat[3];
if ( FindMaterialByNeighbors(test) == -1 ) return false;
}
// Compatible with upper neighbor?
if ( x+0 >= 0 && x+0 < m_materialPointCount &&
y+1 >= 0 && y+1 < m_materialPointCount )
{
test[0] = m_materialPoints[(x+0)+(y+1)*m_materialPointCount].mat[0];
test[1] = m_materialPoints[(x+0)+(y+1)*m_materialPointCount].mat[1];
test[2] = mat[0];
test[3] = m_materialPoints[(x+0)+(y+1)*m_materialPointCount].mat[3];
if ( FindMaterialByNeighbors(test) == -1 ) return false;
}
// Compatible with right neighbor?
if ( x+1 >= 0 && x+1 < m_materialPointCount &&
y+0 >= 0 && y+0 < m_materialPointCount )
{
test[0] = m_materialPoints[(x+1)+(y+0)*m_materialPointCount].mat[0];
test[1] = m_materialPoints[(x+1)+(y+0)*m_materialPointCount].mat[1];
test[2] = m_materialPoints[(x+1)+(y+0)*m_materialPointCount].mat[2];
test[3] = mat[1];
if ( FindMaterialByNeighbors(test) == -1 ) return false;
}
SetMaterialPoint(x, y, id, mat); // puts the point
return true;
}
bool CTerrain::ChangeMaterialPoint(int x, int y, int id)
{
char mat[4];
x /= m_brickCount/m_textureSubdivCount;
y /= m_brickCount/m_textureSubdivCount;
if ( x < 0 || x >= m_materialPointCount ||
y < 0 || y >= m_materialPointCount ) return false;
TerrainMaterial* tm = FindMaterial(id);
if (tm == nullptr) return false;
// Tries without changing neighbors.
if ( CondChangeMaterialPoint(x, y, id, tm->mat) ) return true;
// Tries changing a single neighbor (4x).
for (int up = 0; up < m_maxMaterialID; up++)
{
mat[0] = up;
mat[1] = tm->mat[1];
mat[2] = tm->mat[2];
mat[3] = tm->mat[3];
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
for (int right = 0; right < m_maxMaterialID; right++)
{
mat[0] = tm->mat[0];
mat[1] = right;
mat[2] = tm->mat[2];
mat[3] = tm->mat[3];
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
for (int down = 0; down < m_maxMaterialID; down++)
{
mat[0] = tm->mat[0];
mat[1] = tm->mat[1];
mat[2] = down;
mat[3] = tm->mat[3];
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
for (int left = 0; left < m_maxMaterialID; left++)
{
mat[0] = tm->mat[0];
mat[1] = tm->mat[1];
mat[2] = tm->mat[2];
mat[3] = left;
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
// Tries changing two neighbors (6x).
for (int up = 0; up < m_maxMaterialID; up++)
{
for (int down = 0; down < m_maxMaterialID; down++)
{
mat[0] = up;
mat[1] = tm->mat[1];
mat[2] = down;
mat[3] = tm->mat[3];
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
}
for (int right = 0; right < m_maxMaterialID; right++)
{
for (int left = 0; left < m_maxMaterialID; left++)
{
mat[0] = tm->mat[0];
mat[1] = right;
mat[2] = tm->mat[2];
mat[3] = left;
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
}
for (int up = 0; up < m_maxMaterialID; up++)
{
for (int right = 0; right < m_maxMaterialID; right++)
{
mat[0] = up;
mat[1] = right;
mat[2] = tm->mat[2];
mat[3] = tm->mat[3];
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
}
for (int right = 0; right < m_maxMaterialID; right++)
{
for (int down = 0; down < m_maxMaterialID; down++)
{
mat[0] = tm->mat[0];
mat[1] = right;
mat[2] = down;
mat[3] = tm->mat[3];
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
}
for (int down = 0; down < m_maxMaterialID; down++)
{
for (int left = 0; left < m_maxMaterialID; left++)
{
mat[0] = tm->mat[0];
mat[1] = tm->mat[1];
mat[2] = down;
mat[3] = left;
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
}
for (int up = 0; up < m_maxMaterialID; up++)
{
for (int left = 0; left < m_maxMaterialID; left++)
{
mat[0] = up;
mat[1] = tm->mat[1];
mat[2] = tm->mat[2];
mat[3] = left;
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
}
// Tries changing all the neighbors.
for (int up = 0; up < m_maxMaterialID; up++)
{
for (int right = 0; right < m_maxMaterialID; right++)
{
for (int down = 0; down < m_maxMaterialID; down++)
{
for (int left = 0; left < m_maxMaterialID; left++)
{
mat[0] = up;
mat[1] = right;
mat[2] = down;
mat[3] = left;
if (CondChangeMaterialPoint(x, y, id, mat)) return true;
}
}
}
}
GetLogger()->Error("AddMaterialPoint error\n");
return false;
}
bool CTerrain::InitMaterials(int id)
{
TerrainMaterial* tm = FindMaterial(id);
if (tm == nullptr) return false;
for (int i = 0; i < m_materialPointCount*m_materialPointCount; i++)
{
m_materialPoints[i].id = id;
for (int j = 0; j < 4; j++)
m_materialPoints[i].mat[j] = tm->mat[j];
}
return true;
}
bool CTerrain::GenerateMaterials(int *id, float min, float max,
float slope, float freq,
Math::Vector center, float radius)
{
static char random[100] =
{
84,25,12, 6,34,52,85,38,97,16,
21,31,65,19,62,40,72,22,48,61,
56,47, 8,53,73,77, 4,91,26,88,
76, 1,44,93,39,11,71,17,98,95,
88,83,18,30, 3,57,28,49,74, 9,
32,13,96,66,15,70,36,10,59,94,
45,86, 2,29,63,42,51, 0,79,27,
54, 7,20,69,89,23,64,43,81,92,
90,33,46,14,67,35,50, 5,87,60,
68,55,24,78,41,75,58,80,37,82,
};
TerrainMaterial* tm = nullptr;
int i = 0;
while (id[i] != 0)
{
tm = FindMaterial(id[i++]);
if (tm == nullptr) return false;
}
int numID = i;
int group = m_brickCount / m_textureSubdivCount;
if (radius > 0.0f && radius < 5.0f) // just a square?
{
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int xx = static_cast<int>((center.x+dim)/m_brickSize);
int yy = static_cast<int>((center.z+dim)/m_brickSize);
int x = xx/group;
int y = yy/group;
tm = FindMaterial(id[0]);
if (tm != nullptr)
SetMaterialPoint(x, y, id[0], tm->mat); // puts the point
}
else
{
for (int y = 0; y < m_materialPointCount; y++)
{
for (int x = 0; x < m_materialPointCount; x++)
{
if (radius != 0.0f)
{
Math::Vector pos;
pos.x = (static_cast<float>(x)-m_materialPointCount/2.0f)*group*m_brickSize;
pos.z = (static_cast<float>(y)-m_materialPointCount/2.0f)*group*m_brickSize;
if (Math::DistanceProjected(pos, center) > radius) continue;
}
if (freq < 100.0f)
{
int rnd = random[(x%10)+(y%10)*10];
if ( static_cast<float>(rnd) > freq ) continue;
}
int xx = x*group + group/2;
int yy = y*group + group/2;
if (CheckMaterialPoint(xx, yy, min, max, slope))
{
int rnd = random[(x%10)+(y%10)*10];
int ii = rnd % numID;
ChangeMaterialPoint(xx, yy, id[ii]);
}
}
}
}
return true;
}
void CTerrain::InitMaterialPoints()
{
if (! m_useMaterials) return;
if (! m_materialPoints.empty()) return; // already allocated
m_materialPointCount = (m_mosaicCount*m_brickCount)/(m_brickCount/m_textureSubdivCount)+1;
std::vector<TerrainMaterialPoint>(m_materialPointCount*m_materialPointCount).swap(m_materialPoints);
for (int i = 0; i < m_materialPointCount * m_materialPointCount; i++)
{
for (int j = 0; j < 4; j++)
m_materialPoints[i].mat[j] = 0;
}
}
void CTerrain::FlushMaterialPoints()
{
m_materialPoints.clear();
}
bool CTerrain::CreateSquare(int x, int y)
{
Material mat;
mat.diffuse = Color(1.0f, 1.0f, 1.0f);
mat.ambient = Color(0.0f, 0.0f, 0.0f);
int objRank = m_engine->CreateObject();
m_engine->SetObjectType(objRank, ENG_OBJTYPE_TERRAIN);
m_objRanks[x+y*m_mosaicCount] = objRank;
float min = 0.0f;
float max = m_vision;
max *= m_engine->GetClippingDistance();
for (int step = 0; step < m_depth; step++)
{
CreateMosaic(x, y, 1 << step, objRank, mat, min, max);
min = max;
max *= 2;
if (step == m_depth-1) max = Math::HUGE_NUM;
}
return true;
}
bool CTerrain::CreateObjects()
{
AdjustRelief();
for (int y = 0; y < m_mosaicCount; y++)
{
for (int x = 0; x < m_mosaicCount; x++)
CreateSquare(x, y);
}
return true;
}
/** ATTENTION: ok only with m_depth = 2! */
bool CTerrain::Terraform(const Math::Vector &p1, const Math::Vector &p2, float height)
{
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
Math::IntPoint tp1, tp2;
tp1.x = static_cast<int>((p1.x+dim+m_brickSize/2.0f)/m_brickSize);
tp1.y = static_cast<int>((p1.z+dim+m_brickSize/2.0f)/m_brickSize);
tp2.x = static_cast<int>((p2.x+dim+m_brickSize/2.0f)/m_brickSize);
tp2.y = static_cast<int>((p2.z+dim+m_brickSize/2.0f)/m_brickSize);
if (tp1.x > tp2.x)
{
int x = tp1.x;
tp1.x = tp2.x;
tp2.x = x;
}
if (tp1.y > tp2.y)
{
int y = tp1.y;
tp1.y = tp2.y;
tp2.y = y;
}
int size = (m_mosaicCount*m_brickCount)+1;
// Calculates the current average height
float avg = 0.0f;
int nb = 0;
for (int y = tp1.y; y <= tp2.y; y++)
{
for (int x = tp1.x; x <= tp2.x; x++)
{
avg += m_relief[x+y*size];
nb ++;
}
}
avg /= static_cast<float>(nb);
// Changes the description of the relief
for (int y = tp1.y; y <= tp2.y; y++)
{
for (int x = tp1.x; x <= tp2.x; x++)
{
m_relief[x+y*size] = avg+height;
if (x % m_brickCount == 0 && y % m_depth != 0)
{
m_relief[(x+0)+(y-1)*size] = avg+height;
m_relief[(x+0)+(y+1)*size] = avg+height;
}
if (y % m_brickCount == 0 && x % m_depth != 0)
{
m_relief[(x-1)+(y+0)*size] = avg+height;
m_relief[(x+1)+(y+0)*size] = avg+height;
}
}
}
AdjustRelief();
Math::IntPoint pp1, pp2;
pp1.x = (tp1.x-2)/m_brickCount;
pp1.y = (tp1.y-2)/m_brickCount;
pp2.x = (tp2.x+1)/m_brickCount;
pp2.y = (tp2.y+1)/m_brickCount;
if (pp1.x < 0 ) pp1.x = 0;
if (pp1.x >= m_mosaicCount) pp1.x = m_mosaicCount-1;
if (pp1.y < 0 ) pp1.y = 0;
if (pp1.y >= m_mosaicCount) pp1.y = m_mosaicCount-1;
for (int y = pp1.y; y <= pp2.y; y++)
{
for (int x = pp1.x; x <= pp2.x; x++)
{
m_engine->DeleteObject(m_objRanks[x+y*m_mosaicCount]);
CreateSquare(x, y); // recreates the square
}
}
m_engine->Update();
return true;
}
void CTerrain::SetWind(Math::Vector speed)
{
m_wind = speed;
}
Math::Vector CTerrain::GetWind()
{
return m_wind;
}
float CTerrain::GetFineSlope(const Math::Vector &pos)
{
Math::Vector n;
if (! GetNormal(n, pos)) return 0.0f;
return fabs(Math::RotateAngle(Math::Point(n.x, n.z).Length(), n.y) - Math::PI/2.0f);
}
float CTerrain::GetCoarseSlope(const Math::Vector &pos)
{
if (m_relief.empty()) return 0.0f;
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int x = static_cast<int>((pos.x+dim)/m_brickSize);
int y = static_cast<int>((pos.z+dim)/m_brickSize);
if ( x < 0 || x >= m_mosaicCount*m_brickCount ||
y < 0 || y >= m_mosaicCount*m_brickCount ) return 0.0f;
float level[4] =
{
m_relief[(x+0)+(y+0)*(m_mosaicCount*m_brickCount+1)],
m_relief[(x+1)+(y+0)*(m_mosaicCount*m_brickCount+1)],
m_relief[(x+0)+(y+1)*(m_mosaicCount*m_brickCount+1)],
m_relief[(x+1)+(y+1)*(m_mosaicCount*m_brickCount+1)],
};
float min = Math::Min(level[0], level[1], level[2], level[3]);
float max = Math::Max(level[0], level[1], level[2], level[3]);
return atanf((max-min)/m_brickSize);
}
bool CTerrain::GetNormal(Math::Vector &n, const Math::Vector &p)
{
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int x = static_cast<int>((p.x+dim)/m_brickSize);
int y = static_cast<int>((p.z+dim)/m_brickSize);
if ( x < 0 || x > m_mosaicCount*m_brickCount ||
y < 0 || y > m_mosaicCount*m_brickCount ) return false;
Math::Vector p1 = GetVector(x+0, y+0);
Math::Vector p2 = GetVector(x+1, y+0);
Math::Vector p3 = GetVector(x+0, y+1);
Math::Vector p4 = GetVector(x+1, y+1);
if ( fabs(p.z - p2.z) < fabs(p.x - p2.x) )
n = Math::NormalToPlane(p1,p2,p3);
else
n = Math::NormalToPlane(p2,p4,p3);
return true;
}
float CTerrain::GetFloorLevel(const Math::Vector &pos, bool brut, bool water)
{
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int x = static_cast<int>((pos.x+dim)/m_brickSize);
int y = static_cast<int>((pos.z+dim)/m_brickSize);
if ( x < 0 || x > m_mosaicCount*m_brickCount ||
y < 0 || y > m_mosaicCount*m_brickCount ) return false;
Math::Vector p1 = GetVector(x+0, y+0);
Math::Vector p2 = GetVector(x+1, y+0);
Math::Vector p3 = GetVector(x+0, y+1);
Math::Vector p4 = GetVector(x+1, y+1);
Math::Vector ps = pos;
if ( fabs(pos.z-p2.z) < fabs(pos.x-p2.x) )
{
if ( !IntersectY(p1, p2, p3, ps) ) return 0.0f;
}
else
{
if ( !IntersectY(p2, p4, p3, ps) ) return 0.0f;
}
if (! brut) AdjustBuildingLevel(ps);
if (water) // not going underwater?
{
float level = m_water->GetLevel();
if (ps.y < level) ps.y = level; // not under water
}
return ps.y;
}
float CTerrain::GetHeightToFloor(const Math::Vector &pos, bool brut, bool water)
{
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int x = static_cast<int>((pos.x+dim)/m_brickSize);
int y = static_cast<int>((pos.z+dim)/m_brickSize);
if ( x < 0 || x > m_mosaicCount*m_brickCount ||
y < 0 || y > m_mosaicCount*m_brickCount ) return false;
Math::Vector p1 = GetVector(x+0, y+0);
Math::Vector p2 = GetVector(x+1, y+0);
Math::Vector p3 = GetVector(x+0, y+1);
Math::Vector p4 = GetVector(x+1, y+1);
Math::Vector ps = pos;
if ( fabs(pos.z-p2.z) < fabs(pos.x-p2.x) )
{
if ( !IntersectY(p1, p2, p3, ps) ) return 0.0f;
}
else
{
if ( !IntersectY(p2, p4, p3, ps) ) return 0.0f;
}
if (! brut) AdjustBuildingLevel(ps);
if (water) // not going underwater?
{
float level = m_water->GetLevel();
if (ps.y < level ) ps.y = level; // not under water
}
return pos.y-ps.y;
}
bool CTerrain::AdjustToFloor(Math::Vector &pos, bool brut, bool water)
{
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int x = static_cast<int>((pos.x + dim) / m_brickSize);
int y = static_cast<int>((pos.z + dim) / m_brickSize);
if ( x < 0 || x > m_mosaicCount*m_brickCount ||
y < 0 || y > m_mosaicCount*m_brickCount ) return false;
Math::Vector p1 = GetVector(x+0, y+0);
Math::Vector p2 = GetVector(x+1, y+0);
Math::Vector p3 = GetVector(x+0, y+1);
Math::Vector p4 = GetVector(x+1, y+1);
if (fabs(pos.z - p2.z) < fabs(pos.x - p2.x))
{
if (! Math::IntersectY(p1, p2, p3, pos)) return false;
}
else
{
if (! Math::IntersectY(p2, p4, p3, pos)) return false;
}
if (! brut) AdjustBuildingLevel(pos);
if (water) // not going underwater?
{
float level = m_water->GetLevel();
if (pos.y < level) pos.y = level; // not under water
}
return true;
}
/**
* @returns \c false if the initial coordinate was outside terrain area; \c true otherwise
*/
bool CTerrain::AdjustToStandardBounds(Math::Vector& pos)
{
bool ok = true;
// TODO: _TEEN ... * 0.98f;
float limit = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f*0.92f;
if (pos.x < -limit)
{
pos.x = -limit;
ok = false;
}
if (pos.z < -limit)
{
pos.z = -limit;
ok = false;
}
if (pos.x > limit)
{
pos.x = limit;
ok = false;
}
if (pos.z > limit)
{
pos.z = limit;
ok = false;
}
return ok;
}
/**
* @param margin margin to the terrain border
* @returns \c false if the initial coordinate was outside terrain area; \c true otherwise
*/
bool CTerrain::AdjustToBounds(Math::Vector& pos, float margin)
{
bool ok = true;
float limit = m_mosaicCount*m_brickCount*m_brickSize/2.0f - margin;
if (pos.x < -limit)
{
pos.x = -limit;
ok = false;
}
if (pos.z < -limit)
{
pos.z = -limit;
ok = false;
}
if (pos.x > limit)
{
pos.x = limit;
ok = false;
}
if (pos.z > limit)
{
pos.z = limit;
ok = false;
}
return ok;
}
void CTerrain::FlushBuildingLevel()
{
m_buildingLevels.clear();
}
bool CTerrain::AddBuildingLevel(Math::Vector center, float min, float max,
float height, float factor)
{
int i = 0;
for ( ; i < static_cast<int>( m_buildingLevels.size() ); i++)
{
if ( center.x == m_buildingLevels[i].center.x &&
center.z == m_buildingLevels[i].center.z )
{
break;
}
}
if (i == static_cast<int>( m_buildingLevels.size() ))
m_buildingLevels.push_back(BuildingLevel());
m_buildingLevels[i].center = center;
m_buildingLevels[i].min = min;
m_buildingLevels[i].max = max;
m_buildingLevels[i].level = GetFloorLevel(center, true);
m_buildingLevels[i].height = height;
m_buildingLevels[i].factor = factor;
m_buildingLevels[i].bboxMinX = center.x-max;
m_buildingLevels[i].bboxMaxX = center.x+max;
m_buildingLevels[i].bboxMinZ = center.z-max;
m_buildingLevels[i].bboxMaxZ = center.z+max;
return true;
}
bool CTerrain::UpdateBuildingLevel(Math::Vector center)
{
for (int i = 0; i < static_cast<int>( m_buildingLevels.size() ); i++)
{
if ( center.x == m_buildingLevels[i].center.x &&
center.z == m_buildingLevels[i].center.z )
{
m_buildingLevels[i].center = center;
m_buildingLevels[i].level = GetFloorLevel(center, true);
return true;
}
}
return false;
}
bool CTerrain::DeleteBuildingLevel(Math::Vector center)
{
for (int i = 0; i < static_cast<int>( m_buildingLevels.size() ); i++)
{
if ( center.x == m_buildingLevels[i].center.x &&
center.z == m_buildingLevels[i].center.z )
{
for (int j = i+1; j < static_cast<int>( m_buildingLevels.size() ); j++)
m_buildingLevels[j-1] = m_buildingLevels[j];
m_buildingLevels.pop_back();
return true;
}
}
return false;
}
float CTerrain::GetBuildingFactor(const Math::Vector &p)
{
for (int i = 0; i < static_cast<int>( m_buildingLevels.size() ); i++)
{
if ( p.x < m_buildingLevels[i].bboxMinX ||
p.x > m_buildingLevels[i].bboxMaxX ||
p.z < m_buildingLevels[i].bboxMinZ ||
p.z > m_buildingLevels[i].bboxMaxZ ) continue;
float dist = Math::DistanceProjected(p, m_buildingLevels[i].center);
if (dist <= m_buildingLevels[i].max)
return m_buildingLevels[i].factor;
}
return 1.0f; // it is normal on the ground
}
void CTerrain::AdjustBuildingLevel(Math::Vector &p)
{
for (int i = 0; i < static_cast<int>( m_buildingLevels.size() ); i++)
{
if ( p.x < m_buildingLevels[i].bboxMinX ||
p.x > m_buildingLevels[i].bboxMaxX ||
p.z < m_buildingLevels[i].bboxMinZ ||
p.z > m_buildingLevels[i].bboxMaxZ ) continue;
float dist = Math::DistanceProjected(p, m_buildingLevels[i].center);
if (dist > m_buildingLevels[i].max) continue;
if (dist < m_buildingLevels[i].min)
{
p.y = m_buildingLevels[i].level + m_buildingLevels[i].height;
return;
}
Math::Vector border;
border.x = ((p.x - m_buildingLevels[i].center.x) * m_buildingLevels[i].max) /
dist + m_buildingLevels[i].center.x;
border.z = ((p.z - m_buildingLevels[i].center.z) * m_buildingLevels[i].max) /
dist + m_buildingLevels[i].center.z;
float base = GetFloorLevel(border, true);
p.y = (m_buildingLevels[i].max - dist) /
(m_buildingLevels[i].max - m_buildingLevels[i].min) *
(m_buildingLevels[i].level + m_buildingLevels[i].height-base) +
base;
return;
}
}
float CTerrain::GetHardness(const Math::Vector &p)
{
float factor = GetBuildingFactor(p);
if (factor != 1.0f) return 1.0f; // on building level
if (m_materialPoints.empty()) return m_defaultHardness;
float dim = (m_mosaicCount*m_brickCount*m_brickSize)/2.0f;
int x, y;
x = static_cast<int>((p.x+dim)/m_brickSize);
y = static_cast<int>((p.z+dim)/m_brickSize);
if ( x < 0 || x > m_mosaicCount*m_brickCount ||
y < 0 || y > m_mosaicCount*m_brickCount ) return m_defaultHardness;
x /= m_brickCount/m_textureSubdivCount;
y /= m_brickCount/m_textureSubdivCount;
if ( x < 0 || x >= m_materialPointCount ||
y < 0 || y >= m_materialPointCount ) return m_defaultHardness;
int id = m_materialPoints[x+y*m_materialPointCount].id;
TerrainMaterial* tm = FindMaterial(id);
if (tm == nullptr) return m_defaultHardness;
return tm->hardness;
}
void CTerrain::ShowFlatGround(Math::Vector pos)
{
static char table[41*41] = { 1 };
float radius = 3200.0f/1024.0f;
for (int y = 0; y <= 40; y++)
{
for (int x = 0; x <= 40; x++)
{
int i = x + y*41;
table[i] = 0;
Math::Vector p;
p.x = (x-20)*radius;
p.z = (y-20)*radius;
p.y = 0.0f;
if (Math::Point(p.x, p.y).Length() > 20.0f*radius)
continue;
float angle = GetFineSlope(pos+p);
if (angle < TERRAIN_FLATLIMIT)
table[i] = 1;
else
table[i] = 2;
}
}
m_engine->CreateGroundMark(pos, 40.0f, 0.001f, 15.0f, 0.001f, 41, 41, table);
}
float CTerrain::GetFlatZoneRadius(Math::Vector center, float max)
{
float angle = GetFineSlope(center);
if (angle >= TERRAIN_FLATLIMIT)
return 0.0f;
float ref = GetFloorLevel(center, true);
Math::Point c(center.x, center.z);
float radius = 1.0f;
while (radius <= max)
{
angle = 0.0f;
int nb = static_cast<int>(2.0f*Math::PI*radius);
if (nb < 8) nb = 8;
Math::Point p (center.x+radius, center.z);
for (int i = 0; i < nb; i++)
{
Math::Point result = Math::RotatePoint(c, angle, p);
Math::Vector pos;
pos.x = result.x;
pos.z = result.y;
float h = GetFloorLevel(pos, true);
if ( fabs(h-ref) > 1.0f ) return radius;
angle += Math::PI*2.0f/8.0f;
}
radius += 1.0f;
}
return max;
}
void CTerrain::SetFlyingMaxHeight(float height)
{
m_flyingMaxHeight = height;
}
float CTerrain::GetFlyingMaxHeight()
{
return m_flyingMaxHeight;
}
void CTerrain::FlushFlyingLimit()
{
m_flyingMaxHeight = 280.0f;
m_flyingLimits.clear();
}
void CTerrain::AddFlyingLimit(Math::Vector center,
float extRadius, float intRadius,
float maxHeight)
{
FlyingLimit fl;
fl.center = center;
fl.extRadius = extRadius;
fl.intRadius = intRadius;
fl.maxHeight = maxHeight;
m_flyingLimits.push_back(fl);
}
float CTerrain::GetFlyingLimit(Math::Vector pos, bool noLimit)
{
if (noLimit)
return 280.0f;
if (m_flyingLimits.empty())
return m_flyingMaxHeight;
for (int i = 0; i < static_cast<int>( m_flyingLimits.size() ); i++)
{
float dist = Math::DistanceProjected(pos, m_flyingLimits[i].center);
if (dist >= m_flyingLimits[i].extRadius)
continue;
if (dist <= m_flyingLimits[i].intRadius)
return m_flyingLimits[i].maxHeight;
dist -= m_flyingLimits[i].intRadius;
float h = dist * (m_flyingMaxHeight - m_flyingLimits[i].maxHeight) /
(m_flyingLimits[i].extRadius - m_flyingLimits[i].intRadius);
return h + m_flyingLimits[i].maxHeight;
}
return m_flyingMaxHeight;
}
} // namespace Gfx
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