bool Cterrain::init(const string&heightMapFileName,const Cc3dRect&rect,float heightScale,int quadtreeDepth,
Cc3dTexture*texture){
assert(rect.getWidth()==rect.getHeight());
m_heightScale=heightScale;
m_quadtreeDepth=quadtreeDepth;
m_heightMapFileName=heightMapFileName;
//生成mesh
Cc3dMesh*mesh=new Cc3dMesh();
mesh->init();
mesh->autorelease();
addMesh(mesh);
//读取高程数据--abc
readLandMat();
//求高度范围--abc
float Hmin=c3d_INF;
float Hmax=-c3d_INF;
for(int i=0;i<(int)landMat.size();i++){//倒序--abc
for(int j=0;j<(int)landMat[i].size();j++){//正序--abc
if(landMat[i][j]>Hmax){
Hmax=landMat[i][j];
}
if(landMat[i][j]<Hmin){
Hmin=landMat[i][j];
}
}
}//得到Hmin和Hmax
//设置m_range
m_range.init(rect.getMinX(), rect.getMaxX(), Hmin, Hmax, rect.getMinY(), rect.getMaxY());
//计算步长--abc
int markMatSideLength=pow(2.0,m_quadtreeDepth-1)+1;//do not use 2, should use 2.0, see: http://www.360doc.com/content/11/0826/15/7566064_143451209.shtml
gridSize=m_range.getSpanX()/(markMatSideLength-1);
//填充法向数据--abc
fillNormalMat();
//markmat开辟空间--abc
markmat.resize(markMatSideLength);
for(int i=0;i<(int)markmat.size();i++){
markmat[i].resize(markMatSideLength);
for(int j=0;j<(int)markmat[i].size();j++){
markmat[i][j]=0;
}
}
//制作ground submesh
Cc3dSubMesh*submesh=new Cc3dSubMesh();
submesh->autorelease();
submesh->init();
submesh->setTexture(texture);
submesh->getIndexVBO()->genBuffers();
this->getMesh()->addSubMesh(submesh);
//make submesh
makeMesh();
return true;
}
bool Cterrain::init(const string&heightMapFileName,const Cc3dRect&rect,float heightScale,int quadtreeDepth,
Cc3dTexture*texture){
assert(rect.getWidth()==rect.getHeight());
m_heightScale=heightScale;
m_quadtreeDepth=quadtreeDepth;
m_heightMapFileName=heightMapFileName;
//生成model
Cc3dModel*model=new Cc3dModel();
model->init();
model->autorelease();
addModel(model);
//读取高程数据
readLandMat();
//求高度范围
float Hmin=c3d_INF;
float Hmax=-c3d_INF;
for(int i=0;i<(int)landMat.size();i++){//倒序
for(int j=0;j<(int)landMat[i].size();j++){//正序
if(landMat[i][j]>Hmax){
Hmax=landMat[i][j];
}
if(landMat[i][j]<Hmin){
Hmin=landMat[i][j];
}
}
}//得到Hmin和Hmax
//设置m_range
m_range.init(rect.getMinX(), rect.getMaxX(), Hmin, Hmax, rect.getMinY(), rect.getMaxY());
//计算步长
int markMatSideLength=pow(2,m_quadtreeDepth-1)+1;
gridSize=m_range.getSpanX()/(markMatSideLength-1);
//填充法向数据
fillNormalMat();
//markmat开辟空间
markmat.resize(markMatSideLength);
for(int i=0;i<(int)markmat.size();i++){
markmat[i].resize(markMatSideLength);
for(int j=0;j<(int)markmat[i].size();j++){
markmat[i][j]=0;
}
}
//制作ground mesh
Cc3dMesh*mesh=new Cc3dMesh();
mesh->autorelease();
mesh->init();
mesh->setTexture(texture);
mesh->getIndexVBO()->genBuffers();
this->getModel()->addMesh(mesh);
//make mesh
makeMesh();
//xxxx下面要去掉
//申请空间不光要考虑矩形，还要考虑三角形
//另外注意一个矩形要拆成两个三角形，所以是六个顶点（而非四个）
//矩形最大数量：BMPHEIGHT*BMPWIDTH
//矩形分裂出的最大三角形数量：BMPHEIGHT*BMPWIDTH*2
//补洞三角形最大数量：等于mesh网格的非边缘边个数，等于BMPHEIGHT*(BMPWIDTH-1)+BMPWIDTH*(BMPHEIGHT-1)
//所以总共有BMPHEIGHT*BMPWIDTH*2+(BMPHEIGHT*(BMPWIDTH-1)+BMPWIDTH*(BMPHEIGHT-1))个三角形
int bmpHeight=(int)landMat.size();
int bmpWidth=(int)landMat[0].size();
this->getModel()->getMeshByIndex(0)->getMeshData()->IDtriList.reserve(bmpHeight*bmpWidth*2+(bmpHeight*(bmpWidth-1)+bmpWidth*(bmpHeight-1)));
return true;
}
