#pragma once
#define DebugTerrain
#include "Ogre\Ogre.h"
#include "Ogre\OgreFileSystemLayer.h"
#include "CrisConfig\CrisConfig.h"
#include "Ogre\OgreTerrain.h"
#include "Ogre\OgreTerrainGroup.h"
#include "Ogre\OgreTerrainQuadTreeNode.h"
#include "Ogre\OgreTerrainMaterialGeneratorA.h"
#include "Ogre\OgreTerrainPaging.h"//分页多少
#define TERRAIN_PAGE_MIN_X 0
#define TERRAIN_PAGE_MIN_Y 0
#define TERRAIN_PAGE_MAX_X 0
#define TERRAIN_PAGE_MAX_Y 0#define TERRAIN_FILE_PREFIX String("testTerrain")
#define TERRAIN_FILE_SUFFIX String("dat")
#define TERRAIN_WORLD_SIZE 1200.0f
#define TERRAIN_SIZE 513using namespace Ogre;struct CrisTerrainInitStruct
{CrisTerrainInitStruct():m_scenemanager(NULL),fMaxHoriz(1000),fMinHoriz(0),sMapFilename(""),sElevationFilename(""),fMapSize(TERRAIN_WORLD_SIZE){fInputScale = fMaxHoriz - fMinHoriz;}SceneManager* m_scenemanager;String           sMapFilename;   //地图卫星图片String          sElevationFilename;//高程图Real            fMinHoriz;//最低点Real         fMaxHoriz;//最高点Real         fMapSize;//地形边长Real         fInputScale;    //地形高低差 对比像素的0~1 .可以不需要设置
//位置放在000点，
};class CrisTerrain
{
public:CrisTerrain();~CrisTerrain();void Init(CrisTerrainInitStruct*    sInitData);//void setTerrainImage(const Ogre::String& szCfgFilename = "terrain_texture.jpg");protected:TerrainGlobalOptions* mTerrainGlobals;TerrainGroup* mTerrainGroup;TerrainPaging* mTerrainPaging;PageManager* mPageManager;void testOption();//为了小样例测试加载的，在大工程中可以直接不用
private:CrisTerrainInitStruct*  m_sInitData;void loadConfigFile(const Ogre::String& szCfgFilename = "");Ogre::String                     m_szConfigFileName;CCrisConfigManager                  m_hConfigMgr;bool mFly;Real mFallVelocity;Real mBrushSizeTerrainSpace;Real mHeightUpdateCountDown;Real mHeightUpdateRate;Vector3 mTerrainPos;bool mTerrainsImported;SceneManager*            mSceneMgr;/** @brief 实例化地形 */void setupContent();/** @brief 实例化地形参数 */void configureTerrainDefaults();void initBlendMaps(Terrain* terrain);void defineTerrain(long x, long y, bool flat = false);void getTerrainImage(bool flipX, bool flipY, Image& img);};

#include "Terrain.h"CrisTerrain::CrisTerrain(): mTerrainGroup(0), mTerrainPaging(0), mPageManager(0), mFallVelocity(0), mBrushSizeTerrainSpace(0.02), mHeightUpdateCountDown(0), mTerrainPos(0,0,0), mTerrainsImported(false)
{}CrisTerrain::~CrisTerrain()
{}void CrisTerrain::Init(CrisTerrainInitStruct* sInitData)
{mSceneMgr = sInitData->m_scenemanager;m_sInitData = sInitData;setupContent();//loadConfigFile("terrain.cfg");
}void CrisTerrain::loadConfigFile(const String& szFilename)
{if(!szFilename.empty())m_szConfigFileName = szFilename;elsereturn;//m_hConfigMgr.LoadFromResourceSystem(m_szConfigFileName);//String worldTexture = m_hConfigMgr.GetValueString("Ter", "WorldTexture", "testter.jpg");//OutputDebugString(worldTexture.c_str());}//void CrisTerrain::setTerrainImage(const Ogre::String& szCfgFilename)
//{
//  Terrain::ImportData& defaultimp = mTerrainGroup->getDefaultImportSettings();
//  defaultimp.terrainSize = TERRAIN_SIZE;//不太了解，调试中，这个值越小，地图边缘锯齿现象越严重，太小的话，运行起来程序会跑死、出错
//  defaultimp.worldSize = m_sInitData->fMapSize;//假设为a，那么地图大小为 a x a
//  defaultimp.inputScale = 60;//决定地图最大落差（高度），即位图中白色和黑色部分的高度差
//  defaultimp.minBatchSize = 33;
//  defaultimp.maxBatchSize = 65;
//  // textures
//  defaultimp.layerList.resize(3);//这里设置了3层纹理，DDS为一种高级的纹理模式，DirectDrawSurface，觉得难以理解的话
可以理解为一种特殊的.jpg图片模式，但是用DDS质材的话可以接收并显示地形阴影，用JPG就显示不出来，而且据我调试观
察发现，第一个.dds质材是用来显示纹理图形，第二个.dds才是用来接收和显示阴影的
//
//  defaultimp.layerList[0].worldSize = 1;//这个值关系到此贴图的细致程度，太大的话图片被拉伸得很大，看起来模糊
//  defaultimp.layerList[0].textureNames.push_back(szCfgFilename);
//  defaultimp.layerList[0].textureNames.push_back(szCfgFilename);
//  defaultimp.layerList[1].worldSize = 1;
//  defaultimp.layerList[1].textureNames.push_back(szCfgFilename);
//  defaultimp.layerList[1].textureNames.push_back(szCfgFilename);
//  defaultimp.layerList[2].worldSize = 2;
//  defaultimp.layerList[2].textureNames.push_back(szCfgFilename);
//  defaultimp.layerList[2].textureNames.push_back(szCfgFilename);
//
//  mTerrainGroup->loadAllTerrains(true);
//
//  if (mTerrainsImported)
//  {
//      TerrainGroup::TerrainIterator ti = mTerrainGroup->getTerrainIterator();
//      while(ti.hasMoreElements())
//      {
//          Terrain* t = ti.getNext()->instance;
//          initBlendMaps(t);
//      }
//  }
//
//  mTerrainGroup->freeTemporaryResources();
//}void CrisTerrain::testOption()
{//mEditMarker = mSceneMgr->createEntity("editMarker", "sphere.mesh");//mEditNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();//mEditNode->attachObject(mEditMarker);//mEditNode->setScale(0.05, 0.05, 0.05);Ogre::FileSystemLayer* mFSLayer = OGRE_NEW_T(Ogre::FileSystemLayer, Ogre::MEMCATEGORY_GENERAL)(OGRE_VERSION_NAME);ResourceGroupManager::getSingleton().createResourceGroup("Terrain");ResourceGroupManager::getSingleton().addResourceLocation(mFSLayer->getWritablePath(""), "FileSystem", "Terrain", false, false);MaterialManager::getSingleton().setDefaultTextureFiltering(TFO_ANISOTROPIC);MaterialManager::getSingleton().setDefaultAnisotropy(7);//mSceneMgr->setFog(FOG_LINEAR, ColourValue(0.7, 0.7, 0.8), 0, 1000, 2500);LogManager::getSingleton().setLogDetail(LL_BOREME);mSceneMgr->setAmbientLight(ColourValue(0.6, 0.6, 0.6));create a few entities on the terrain//Entity* e = mSceneMgr->createEntity("tudorhouse.mesh");//Vector3 entPos(mTerrainPos.x + 2043, 0, mTerrainPos.z + 1715);//Quaternion rot;//entPos.y = mTerrainGroup->getHeightAtWorldPosition(entPos) + 65.5 + mTerrainPos.y;//rot.FromAngleAxis(Degree(Math::RangeRandom(-180, 180)), Vector3::UNIT_Y);//SceneNode* sn = mSceneMgr->getRootSceneNode()->createChildSceneNode(entPos, rot);//sn->setScale(Vector3(0.12, 0.12, 0.12));//sn->attachObject(e);//mSceneMgr->setSkyBox(true, "Examples/CloudyNoonSkyBox");
}void CrisTerrain::setupContent()
{bool blankTerrain = false;//blankTerrain = true;mTerrainGlobals = OGRE_NEW TerrainGlobalOptions();//TerrainGlobalOptions是一个类，定义了地形块的一些全局变量和默认值，需要的话我们可以改变他的变量参数，我们后面再做改变。#ifdef DebugTerraintestOption();
#endif//创建地形分组Ogre::TerrainGroup    /*实例化一个TerrainGroup对象参数1：为他指定场管理器、参数2：地形的平铺方向，平铺方向一般采用ALIGN_X_Z，也就是采用Y作为高度参数3：unit16 TERRAINSIZE=2~n+1，比如512+1=513，不符合公式的可能会导致地图显示异常，表示“Thesize of each terrain down one edge in vertices (2^n+1)”楼主只能理解意思，不能完全正确表达其中的专有名词，实际调试中，这个参数影响地图边缘的锯齿度，越小锯齿越明显，取值太小的话，运行会错误；参数4：Real TERRAINWORLDSIZE，地图大小，表示地图正方形的边长）*/mTerrainGroup = OGRE_NEW TerrainGroup(mSceneMgr, Terrain::ALIGN_X_Z, TERRAIN_SIZE, m_sInitData->fMapSize);//定义命名前缀mTerrainGroup->setFilenameConvention(TERRAIN_FILE_PREFIX, TERRAIN_FILE_SUFFIX);//设置了该地形组的起始位置，在以后创建的地形块中均采用此位置作为相对位置mTerrainGroup->setOrigin(mTerrainPos);mTerrainGroup->setResourceGroup("Terrain");//配置地图块参数 configureTerrainDefaultsconfigureTerrainDefaults();for (long x = TERRAIN_PAGE_MIN_X; x <= TERRAIN_PAGE_MAX_X; ++x)for (long y = TERRAIN_PAGE_MIN_Y; y <= TERRAIN_PAGE_MAX_Y; ++y)defineTerrain(x, y, blankTerrain);// 开始前加载好mTerrainGroup->loadAllTerrains(true);if (mTerrainsImported){TerrainGroup::TerrainIterator ti = mTerrainGroup->getTerrainIterator();while(ti.hasMoreElements()){Terrain* t = ti.getNext()->instance;initBlendMaps(t);}}mTerrainGroup->freeTemporaryResources();
}void CrisTerrain::getTerrainImage(bool flipX, bool flipY, Image& img)
{img.load(m_sInitData->sElevationFilename, ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);if (flipX)img.flipAroundY();if (flipY)img.flipAroundX();}void CrisTerrain::defineTerrain(long x, long y, bool flat)
{// if a file is available, use it// if not, generate file from import// Usually in a real project you'll know whether the compact terrain data is// available or not; I'm doing it this way to save distribution sizeif (flat){mTerrainGroup->defineTerrain(x, y, 0.0f);}else{String filename = mTerrainGroup->generateFilename(x, y);if (ResourceGroupManager::getSingleton().resourceExists(mTerrainGroup->getResourceGroup(), filename)){mTerrainGroup->defineTerrain(x, y);}else{Image img;getTerrainImage(x % 2 != 0, y % 2 != 0, img);mTerrainGroup->defineTerrain(x, y, &img);mTerrainsImported = true;}}
}void CrisTerrain::configureTerrainDefaults()
{// Configure globalmTerrainGlobals->setMaxPixelError(8);// testing composite mapmTerrainGlobals->setCompositeMapDistance(3000);//距离镜头超过3000部分使用地图合成（CompositeMap）模式表现//mTerrainGlobals->setUseRayBoxDistanceCalculation(true);//mTerrainGlobals->getDefaultMaterialGenerator()->setDebugLevel(1);//mTerrainGlobals->setLightMapSize(256);// Configure default import settings for if we use imported imageTerrain::ImportData& defaultimp = mTerrainGroup->getDefaultImportSettings();defaultimp.terrainSize = TERRAIN_SIZE;//不太了解，调试中，这个值越小，地图边缘锯齿现象越严重，太小的话，运行起来程序会跑死、出错defaultimp.worldSize = m_sInitData->fMapSize;//假设为a，那么地图大小为 a x adefaultimp.inputScale = m_sInitData->fInputScale;//决定地图最大落差（高度），即位图中白色和黑色部分的高度差defaultimp.minBatchSize = 33;defaultimp.maxBatchSize = 65;// texturesdefaultimp.layerList.resize(3);//这里设置了3层纹理，DDS为一种高级的纹理模式，DirectDrawSurface，觉得难以理解的话
//可以理解为一种特殊的.jpg图片模式，但是用DDS质材的话可以接收并显示地形阴影，用JPG就显示不出来，而且据我调试观
//察发现，第一个.dds质材是用来显示纹理图形，第二个.dds才是用来接收和显示阴影的defaultimp.layerList[0].worldSize = m_sInitData->fMapSize;//这个值关系到此贴图的细致程度，太大的话图片被拉伸得很大，看起来模糊defaultimp.layerList[0].textureNames.push_back(m_sInitData->sMapFilename);defaultimp.layerList[0].textureNames.push_back(m_sInitData->sMapFilename);defaultimp.layerList[1].worldSize = m_sInitData->fMapSize;defaultimp.layerList[1].textureNames.push_back("white2.dds");defaultimp.layerList[1].textureNames.push_back("white2.dds");defaultimp.layerList[2].worldSize = m_sInitData->fMapSize;defaultimp.layerList[2].textureNames.push_back("white2.dds");defaultimp.layerList[2].textureNames.push_back("white2.dds");//defaultimp.layerList[0].worldSize = 100;//这个值关系到此贴图的细致程度，太大的话图片被拉伸得很大，看起来模糊//defaultimp.layerList[0].textureNames.push_back("dirt_grayrocky_diffusespecular.dds");//defaultimp.layerList[0].textureNames.push_back("dirt_grayrocky_normalheight.dds");//defaultimp.layerList[1].worldSize = 30;//defaultimp.layerList[1].textureNames.push_back("grass_green-01_diffusespecular.dds");//defaultimp.layerList[1].textureNames.push_back("grass_green-01_normalheight.dds");//defaultimp.layerList[2].worldSize = 100;//defaultimp.layerList[2].textureNames.push_back("growth_weirdfungus-03_diffusespecular.dds");//defaultimp.layerList[2].textureNames.push_back("growth_weirdfungus-03_normalheight.dds");
}void CrisTerrain::initBlendMaps(Terrain* terrain)
{TerrainLayerBlendMap* blendMap0 = terrain->getLayerBlendMap(1);TerrainLayerBlendMap* blendMap1 = terrain->getLayerBlendMap(2);Real minHeight0 = 70;Real fadeDist0 = 40;Real minHeight1 = 70;Real fadeDist1 = 15;float* pBlend1 = blendMap1->getBlendPointer();for (Ogre::uint16 y = 0; y < terrain->getLayerBlendMapSize(); ++y){for (Ogre::uint16 x = 0; x < terrain->getLayerBlendMapSize(); ++x){Real tx, ty;blendMap0->convertImageToTerrainSpace(x, y, &tx, &ty);Real height = terrain->getHeightAtTerrainPosition(tx, ty);Real val = (height - minHeight0) / fadeDist0;Math::Clamp(val, (Real)0, (Real)1);val = (height - minHeight1) / fadeDist1;val = Math::Clamp(val, (Real)0, (Real)1);*pBlend1++ = val;}}blendMap0->dirty();blendMap1->dirty();//blendMap0->loadImage("blendmap1.png", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);blendMap0->update();blendMap1->update();// set up a colour map/*if (!terrain->getGlobalColourMapEnabled()){terrain->setGlobalColourMapEnabled(true);Image colourMap;colourMap.load("testcolourmap.jpg", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);terrain->getGlobalColourMap()->loadImage(colourMap);}*/}