#include "..\..\GameEngine\GameEngine_Common.h"
#include "LODTerrain.h"
#include "Frustum.h"
#include "Camera.h"
CLODTerrain::CLODTerrain(LPDIRECT3DDEVICE9 pd3dDevice,bool bUseHeightFile){
m_pd3dDevice=pd3dDevice;
m_pFrustum=new CFrustum();
m_iTerrainSize=1024;
m_pbQuadMat=new bool[(m_iTerrainSize+1)*(m_iTerrainSize+1)];
m_fHeightScale=1.0f;
m_pucHeightData=new unsigned char[(m_iTerrainSize+1)*(m_iTerrainSize+1)];
m_fResolution=5.0f;
m_fHeightDetail=8.0f;
m_iTexMapRepeatNum=10;
m_bUseHeightFile=bUseHeightFile;
}
CLODTerrain::~CLODTerrain(){
delete[] m_pbQuadMat;
delete[] m_pucHeightData;
if(m_pVertexBuffer!=NULL){
m_pVertexBuffer->Release();
m_pVertexBuffer=NULL;
}
if(m_pTexture!=NULL){
m_pTexture->Release();
m_pTexture=NULL;
}
}
bool CLODTerrain::InitTerrain(TCHAR* szHeightFile,TCHAR* szTextureFile){
if(m_bUseHeightFile){
if(!InitTerrainByFile(szHeightFile,szTextureFile)){
return false;
}
}
else{
if(!InitTerrainByFun(szTextureFile)){
return false;
}
}
return true;
}
bool CLODTerrain::InitTerrainByFun(char* szTextureFile){
if(!InitQuadMat())
return false;
if(!InitVertexBuf())
return false;
if(FAILED(D3DXCreateTextureFromFile(m_pd3dDevice,szTextureFile,&m_pTexture)))
return false;
return true;
}
bool CLODTerrain::InitTerrainByFile(TCHAR* szHeightFile,TCHAR* szTextureFile){
m_bUseHeightFile=true;
if(!InitQuadMat())
return false;
if(!InitVertexBuf())
return false;
if(!LoadHeightData(szHeightFile))
return false;
if(FAILED(D3DXCreateTextureFromFile(m_pd3dDevice,szTextureFile,&m_pTexture)))
return false;
return true;
}
bool CLODTerrain::InitQuadMat(){
if(!m_pbQuadMat){
MessageBox(NULL,"创建地形标志数组内存不足","提示",0);
return false;
}
for(int x=0;x<=m_iTerrainSize;x++){
for(int z=0;z<=m_iTerrainSize;z++){
SetQuadMatData(x,z,false);
}
}
return true;
}
bool CLODTerrain::InitVertexBuf(){
if(FAILED(m_pd3dDevice->CreateVertexBuffer(10*sizeof(CUSTOMVERTEX),0,CUSTOMVERTEX_FVF,
D3DPOOL_MANAGED,&m_pVertexBuffer,NULL))){
MessageBox(NULL,"创建顶点缓冲区失败","提示",0);
return false;
}
return true;
}
bool CLODTerrain::LoadHeightData(TCHAR* szFileName){
FILE* pFile;
pFile=fopen(szFileName,"rb");
if(!pFile){
return false;
}
if(!m_pucHeightData){
MessageBox(NULL,"创建地形数据内存不足","提示",0);
}
fread(m_pucHeightData,1,(m_iTerrainSize+1)*(m_iTerrainSize+1),pFile);
fclose(pFile);
return true;
}
float CLODTerrain::GenerateHeightData(float x,float z){
return 8*sinf(x)*cosf(z/10)+1.0f;
}
bool CLODTerrain::GetQuadMatData(int x,int z){
return m_pbQuadMat[m_iTerrainSize*z+x];
}
void CLODTerrain::SetQuadMatData(int x,int z,bool b){
if(x>=0 && x<=m_iTerrainSize && z>=0 && z<=m_iTerrainSize){
m_pbQuadMat[m_iTerrainSize*z+x]=b;
}
}
void CLODTerrain::TrimNodeSplit(int iX,int iZ,int iNodeLength){ //去除不合法的分割
int iChildNodeOffset=iNodeLength/4;
int iChildNodeLength=iNodeLength/2;
if(iNodeLength>=4 && GetQuadMatData(iX,iZ)==true){
if((iX+iNodeLength)<=m_iTerrainSize && GetQuadMatData(iX+iNodeLength,iZ)==false){
SetChildNodeFalse(iX+iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
SetChildNodeFalse(iX+iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
}
if((iZ-iNodeLength)>=0 && GetQuadMatData(iX,iZ-iNodeLength)==false){
SetChildNodeFalse(iX-iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
SetChildNodeFalse(iX+iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
}
if((iX-iNodeLength)>=0 && GetQuadMatData(iX-iNodeLength,iZ)==false){
SetChildNodeFalse(iX-iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
SetChildNodeFalse(iX-iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
}
if((iZ+iNodeLength)<=m_iTerrainSize && GetQuadMatData(iX,iZ+iNodeLength)==false){
SetChildNodeFalse(iX-iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
SetChildNodeFalse(iX+iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
}
TrimNodeSplit(iX+iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
TrimNodeSplit(iX+iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
TrimNodeSplit(iX-iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
TrimNodeSplit(iX-iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
}
else if(GetQuadMatData(iX,iZ)==false){
SetChildNodeFalse(iX,iZ,iNodeLength);
}
}
void CLODTerrain::SetChildNodeFalse(int iX,int iZ,int iNodeLength){
int iChildNodeOffset=iNodeLength/4;
int iChildNodeLength=iNodeLength/2;
SetQuadMatData(iX,iZ,false);
if(iNodeLength>=4){
SetChildNodeFalse(iX+iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
SetChildNodeFalse(iX+iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
SetChildNodeFalse(iX-iChildNodeOffset,iZ-iChildNodeOffset,iChildNodeLength);
SetChildNodeFalse(iX-iChildNodeOffset,iZ+iChildNodeOffset,iChildNodeLength);
}
}
void CLODTerrain::UpdateTerrain(CCamera* pCamera){
SplitNode(m_iTerrainSize/2.0f,m_iTerrainSize/2.0f,m_iTerrainSize,pCamera);
TrimNodeSplit(m_iTerrainSize/2,m_iTerrainSize/2,m_iTerrainSize);
}
void CLODTerrain::Render(){
m_pd3dDevice->Clear(0,NULL,D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,D3DCOLOR_XRGB(0,0,0),1.0f,0);
m_pd3dDevice->SetRenderState(D3DRS_LIGHTING,false);
// m_pd3dDevice->SetSamplerState(0,D3DSAMP_MINFILTER,D3DTEXF_LINEAR);
// m_pd3dDevice->SetSamplerState(0,D3DSAMP_MAGFILTER,D3DTEXF_LINEAR);
m_pd3dDevice->SetFVF(CUSTOMVERTEX_FVF);
// m_pd3dDevice->SetTexture(0,m_pTexture);
m_pd3dDevice->BeginScene();
RenderNode(m_iTerrainSize/2.0f,m_iTerrainSize/2.0f,m_iTerrainSize);
m_pd3dDevice->EndScene();
m_pd3dDevice->Present(NULL,NULL,NULL,NULL);
}
void CLODTerrain::SplitNode(float x,float z,int iNodeLength,CCamera* pCamera){
int iX=(int)x;
int iZ=(int)z;
float y;
if(!m_bUseHeightFile)
y=m_pucHeightData[iZ*m_iTerrainSize+iX]*m_fHeightScale; //该点的高度
else
y=GenerateHeightData(x,z)*m_fHeightScale;
float fCameraDistance;
float fRule;
bool bSplit;
int iChildNodeLength;
float fChildNodeOffset;
//节点不在视截体内,设置标志后返回
m_pFrustum->GetFrustum(m_pd3dDevice,0.0f);
if(m_pFrustum->CheckCube(x,y,z,(float)iNodeLength))
m_pbQuadMat[m_iTerrainSize*iZ+iX]=true;
else{
m_pbQuadMat[m_iTerrainSize*iZ+iX]=false;
return;
}
//距离检测
D3DXVECTOR3* pCameraPos=NULL;
pCameraPos=pCamera->GetCameraPos();
fCameraDistance=(float)(fabs(pCameraPos->x-x)+
fabs(pCameraPos->y-y)+
fabs(pCameraPos->z-z));
//变形幅度估值
if(m_bUseHeightFile==true){
int iVertexOffset=iNodeLength>>1;
int iChildNodeLength=iVertexOffset>>1;
float fArrayHeightEva[9];
fArrayHeightEva[0]=m_pucHeightData[m_iTerrainSize*iZ+iX]*m_fHeightScale;
fArrayHeightEva[1]=m_pucHeightData[m_iTerrainSize*iZ+(iX+iVertexOffset)]*m_fHeightScale;
fArrayHeightEva[2]=m_pucHeightData[m_iTerrainSize*(iZ-iVertexOffset)+iX]*m_fHeightScale;
fArrayHeightEva[3]=m_pucHeightData[m_iTerrainSize*iZ+(iX-iVertexOffset)]*m_fHeightScale;
fArrayHeightEva[4]=m_pucHeightData[m_iTerrainSize*(iZ+iVertexOffset)+iX]*m_fHeightScale;
fArrayHeightEva[5]=m_pucHeightData[m_iTerrainSize*(iZ+iChildNodeLength)+(iX+iChildNodeLength)]*m_fHeightScale;
fArrayHeightEva[6]=m_pucHeightData[m_iTerrainSize*(iZ-iChildNodeLength)+(iX+iChildNodeLength)]*m_fHeightScale;
fArrayHeightEva[7]=m_pucHeightData[m_iTerrainSize*(iZ-iChildNodeLength)+(iX-iChildNodeLength)]*m_fHeightScale;
fArrayHeightEva[8]=m_pucHeightData[m_iTerrainSize*(iZ+iChildNodeLength)+(iX-iChildNodeLength)]*m_fHeightScale;
float fMaxHeight=fArrayHeightEva[0];
float fMinHeight=fArrayHeightEva[0];
for(int i=1;i<9;i++){
if(fArrayHeightEva[i]>fMaxHeight)
fMaxHeight=fArrayHeightEva[i];
if(fArrayHeightEva[i]<fMinHeight)
fMinHeight=fArrayHeightEva[i];
}
float fHeightDiff=fMaxHeight-fMinH
Visual C++ DirectX9 3D游戏开发导引 源代码
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Visual C++ DirectX9 3D游戏开发导引 源代码 （1011个子文件） 
Game.aps 17KB
wall.bmp 402KB chess.bmp 275KB chess.bmp 275KB Tiny_skin.bmp 192KB Tiny_skin.bmp 192KB tiger.bmp 65KB floor.bmp 48KB floor.bmp 48KB floor.bmp 48KB grass.bmp 48KB gun.bmp 47KB gun.bmp 47KB gunmask.bmp 47KB ground.bmp 42KB sphere.bmp 42KB left.bmp 42KB front.bmp 42KB floor.bmp 32KB sky.bmp 32KB floor.bmp 32KB floor.bmp 32KB particle.bmp 28KB particleAlpha.bmp 28KB LODTerrain.cpp 42KB LODTerrain.cpp 41KB SkinMesh.cpp 17KB main.cpp 16KB GameEngine_SceneManager.cpp 11KB main.cpp 10KB TextureCone.cpp 9KB main.cpp 9KB AlphaBlend.cpp 9KB main.cpp 9KB GameEngine_Input.cpp 8KB GameEngine_Input.cpp 8KB main.cpp 8KB main.cpp 8KB main.cpp 8KB main.cpp 7KB Cube.cpp 6KB LightMaterial.cpp 6KB main.cpp 6KB main.cpp 6KB GameEngine_Particle.cpp 6KB GameEngine_Sound.cpp 6KB TransparentBlend.cpp 6KB BasicXFile.cpp 5KB Frustum.cpp 5KB Frustum.cpp 5KB TextureAddress.cpp 5KB Shoot.cpp 4KB HandleJoystick.cpp 4KB HandleMouse.cpp 4KB main.cpp 4KB GameEngine_EnergyBar.cpp 3KB main.cpp 3KB Triangle.cpp 3KB SampleWindow.cpp 3KB GameEngine_Camera.cpp 3KB main.cpp 3KB main.cpp 3KB main.cpp 3KB main.cpp 3KB GameEngine_Font.cpp 3KB Camera.cpp 3KB main.cpp 2KB Camera.cpp 2KB GameEngine_light.cpp 2KB main.cpp 2KB main.cpp 2KB HandleKey.cpp 2KB main.cpp 2KB main.cpp 2KB main.cpp 2KB GameEngine_VertexBuffer.cpp 2KB main.cpp 2KB GameEngine_Material.cpp 2KB main.cpp 2KB GameEngine_App.cpp 2KB SimpleMap.cpp 2KB GameEngine_App.cpp 1KB main.cpp 1KB main.cpp 1KB GameEngine_Timer.cpp 1KB GameEngine_Texture.cpp 1KB main.cpp 948B main.cpp 922B main.cpp 893B main.cpp 854B main.cpp 799B main.cpp 764B main.cpp 742B main.cpp 596B main.cpp 531B main.cpp 515B main.cpp 471B main.cpp 452B main.cpp 452B main.cpp 445B共 1011 条
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