void Cterrain::makeMesh(){
int nVertex=(int)markmat.size()*(int)markmat[0].size();
int nStep=3+2+3+2;
float *vertexArray=new float[nVertex*nStep];
//填充vertexArray
for(int i=0;i<(int)markmat.size();i++){
for(int j=0;j<(int)markmat[i].size();j++){
float x,y,z;
x=m_range.getMinX()+j*gridSize;
y=landMat[min(i,(int)landMat.size()-1)][min(j,(int)landMat[0].size()-1)];
z=m_range.getMinZ()+i*gridSize;
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+0)=x;
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+1)=y;
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+2)=z;
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+3)=m_uvScale*j/(int)markmat[0].size();
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+4)=m_uvScale*i/(int)markmat.size();
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+5)=normalMat[min(i,(int)landMat.size()-1)][min(j,(int)landMat[0].size()-1)].x();
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+6)=normalMat[min(i,(int)landMat.size()-1)][min(j,(int)landMat[0].size()-1)].y();
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+7)=normalMat[min(i,(int)landMat.size()-1)][min(j,(int)landMat[0].size()-1)].z();
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+8)=(x-m_range.getMinX())/m_range.getSpanX();//alpha map texCoord s
*(vertexArray+i*(int)markmat[0].size()*(3+2+3+2)+j*(3+2+3+2)+9)=(z-m_range.getMinZ())/m_range.getSpanZ();//alpha map texCoord t
}
}
this->getModel()->getMeshByIndex(0)->getMeshData()->vlist.clear();
for(int i=0;i<nVertex;i++){
Cc3dVertex vertex;
vertex.setPos(vertexArray+i*nStep);
vertex.setTexCoord(vertexArray+i*nStep+3);
vertex.setNorm(vertexArray+i*nStep+3+2);
vertex.setTexCoord2(vertexArray+i*nStep+3+2+3);
this->getModel()->getMeshByIndex(0)->getMeshData()->vlist.push_back(vertex);
}
//释放vertexArray
delete []vertexArray;
}
Cc3dMeshData*genSampleCubeWithCode(float cx,float cy,float cz,float dx,float dy,float dz,
float k_s,
float k_t,
int cubUVMode)
//用代码生成示例立方体
//cx,cy,cz为中心
//dx,dy,dz分别为x,y,z方向上的边心距
{
Cc3dMeshData*meshData=new Cc3dMeshData();
meshData->init();
meshData->autorelease();
meshData->vlist.reserve(8);
meshData->IDtriList.reserve(12);
//----生成顶点数据
Cc3dVertex tv;
//前面
tv.setPos(Cc3dVector3(cx-dx, cy-dy,cz+dz));tv.setTexCoord(Cc3dVector2(0, 0));tv.setNorm(Cc3dVector3(0, 0, 1));//0
meshData->vlist.push_back(tv);
tv.setPos(Cc3dVector3(cx+dx, cy-dy,cz+dz));tv.setTexCoord(Cc3dVector2(1, 0));tv.setNorm(Cc3dVector3(0, 0, 1));//1
meshData->vlist.push_back(tv);
tv.setPos(Cc3dVector3(cx+dx, cy+dy, cz+dz));tv.setTexCoord(Cc3dVector2(1, 1));tv.setNorm(Cc3dVector3(0, 0, 1));//2
meshData->vlist.push_back(tv);
tv.setPos(Cc3dVector3(cx-dx, cy+dy, cz+dz));tv.setTexCoord(Cc3dVector2(0, 1));tv.setNorm(Cc3dVector3(0, 0, 1));//3
meshData->vlist.push_back(tv);
//后面
tv.setPos(Cc3dVector3(cx-dx, cy-dy,cz -dz));tv.setTexCoord(Cc3dVector2(0, 0));tv.setNorm(Cc3dVector3(0, 0, -1));//4
meshData->vlist.push_back(tv);
tv.setPos(Cc3dVector3(cx+dx, cy-dy, cz-dz));tv.setTexCoord(Cc3dVector2(1, 0));tv.setNorm(Cc3dVector3(0, 0, -1));//5
meshData->vlist.push_back(tv);
tv.setPos(Cc3dVector3(cx+dx, cy+dy, cz-dz));tv.setTexCoord(Cc3dVector2(1, 1));tv.setNorm(Cc3dVector3(0, 0, -1));//6
meshData->vlist.push_back(tv);
tv.setPos(cx-dx, cy+dy, cz-dz);tv.setTexCoord(0, 1);tv.setNorm(0, 0, -1);//7
meshData->vlist.push_back(tv);
//上面
tv.setPos(cx-dx, cy+dy, cz+dz);tv.setTexCoord(0, 0);tv.setNorm(0, 1, 0);//8
meshData->vlist.push_back(tv);
tv.setPos(cx+dx, cy+dy, cz+dz);tv.setTexCoord(1, 0);tv.setNorm(0, 1, 0);//9
meshData->vlist.push_back(tv);
tv.setPos(cx+dx, cy+dy, cz-dz);tv.setTexCoord(1, 1);tv.setNorm(0, 1, 0);//10
meshData->vlist.push_back(tv);
tv.setPos(cx-dx, cy+dy, cz-dz);tv.setTexCoord(0, 1);tv.setNorm(0, 1, 0);//11
meshData->vlist.push_back(tv);
//下面
tv.setPos(cx-dx, cy-dy, cz+dz);tv.setTexCoord(0, 0);tv.setNorm(0, -1, 0);//12
meshData->vlist.push_back(tv);
tv.setPos(cx+dx, cy-dy, cz+dz);tv.setTexCoord(1, 0);tv.setNorm(0, -1, 0);//13
meshData->vlist.push_back(tv);
tv.setPos(cx+dx, cy-dy, cz-dz);tv.setTexCoord(1, 1);tv.setNorm(0, -1, 0);//14
meshData->vlist.push_back(tv);
tv.setPos(cx-dx, cy-dy, cz-dz);tv.setTexCoord(0, 1);tv.setNorm(0, -1, 0);//15
meshData->vlist.push_back(tv);
//左面
tv.setPos(cx-dx, cy-dy,cz -dz);tv.setTexCoord(0, 0);tv.setNorm(-1, 0, 0);//16
meshData->vlist.push_back(tv);
tv.setPos(cx-dx, cy-dy, cz+dz);tv.setTexCoord(1, 0);tv.setNorm(-1, 0, 0);//17
meshData->vlist.push_back(tv);
tv.setPos(cx-dx, cy+dy, cz+dz);tv.setTexCoord(1, 1);tv.setNorm(-1, 0, 0);//18
meshData->vlist.push_back(tv);
tv.setPos(cx-dx, cy+dy, cz-dz);tv.setTexCoord(0, 1);tv.setNorm(-1, 0, 0);//19
meshData->vlist.push_back(tv);
//右面
tv.setPos(cx+dx, cy-dy, cz-dz);tv.setTexCoord(0, 0);tv.setNorm(1, 0, 0);//20
meshData->vlist.push_back(tv);
tv.setPos(cx+dx, cy-dy,cz+ dz);tv.setTexCoord(1, 0);tv.setNorm(1, 0, 0);//21
meshData->vlist.push_back(tv);
tv.setPos(cx+dx, cy+dy, cz+dz);tv.setTexCoord(1, 1);tv.setNorm(1, 0, 0);//22
meshData->vlist.push_back(tv);
tv.setPos(cx+dx, cy+dy, cz-dz);tv.setTexCoord(0, 1);tv.setNorm(1, 0, 0);//23
meshData->vlist.push_back(tv);
//----生成索引三角形
Cc3dIDTriangle tIDtri;
//前面
tIDtri.setvID(0, 1, 2);
meshData->IDtriList.push_back(tIDtri);
tIDtri.setvID(0, 2, 3);
meshData->IDtriList.push_back(tIDtri);
//后面
tIDtri.setvID(4, 6, 5);
meshData->IDtriList.push_back(tIDtri);
tIDtri.setvID(4, 7, 6);
meshData->IDtriList.push_back(tIDtri);
//上面
tIDtri.setvID(8, 9, 10);
meshData->IDtriList.push_back(tIDtri);
tIDtri.setvID(8, 10, 11);
meshData->IDtriList.push_back(tIDtri);
//下面
tIDtri.setvID(12, 14, 13);
meshData->IDtriList.push_back(tIDtri);
tIDtri.setvID(12, 15, 14);
meshData->IDtriList.push_back(tIDtri);
//左面
tIDtri.setvID(16, 17, 18);
meshData->IDtriList.push_back(tIDtri);
tIDtri.setvID(16, 18, 19);
meshData->IDtriList.push_back(tIDtri);
//右面
tIDtri.setvID(20, 22, 21);
meshData->IDtriList.push_back(tIDtri);
tIDtri.setvID(20, 23, 22);
meshData->IDtriList.push_back(tIDtri);
//----重新计算各三角形各顶点的uv
int nv=(int)meshData->vlist.size();
vector<bool> markList(nv);//标记各顶点是否已经重计算过uv，避免多次计算（多次计算可能导致出错）,初始全0
int nIDtri=(int)meshData->IDtriList.size();
for(int i=0;i<nIDtri;i++){
Cc3dIDTriangle&IDtri=meshData->IDtriList[i];
//重新计算IDtri各顶点的uv
switch(cubUVMode)
{
case cubUVMode_FITFACE:
{
//将IDtri中未mark的顶点的uv分别乘以k_s,k_t
for(int j=0;j<3;j++){
int vID=IDtri.vID[j];//顶点号
if(markList[vID]==false){//未计算过
//重新计算
Cc3dVertex&v=meshData->vlist[vID];
Cc3dVector2 texCoord=v.getTexCoord();
texCoord.setx(texCoord.x()*k_s);
texCoord.sety(texCoord.y()*k_t);
v.setTexCoord(texCoord);
markList[vID]=true;//标记为已计算
}
}
}break;
case cubUVMode_UNIFORM:
{
//将IDtri各顶点的uv，重新按顶点坐标来计算，并以k_s,k_t放缩
//判断IDtri的类型
const int type_LR=0;//左或右
const int type_UD=1;//上或下
const int type_FB=2;//前或后
int type=0;
Cc3dVector3 norm=meshData->vlist[IDtri.vID[0]].getNorm();
if(fabsf(fabsf(norm.x())-1)<0.01){//左面或右面
type=type_LR;
}else if(fabsf(fabsf(norm.y())-1)<0.01){//上面或下面
type=type_UD;
}else{//前面或后面
type=type_FB;
}//得到type
for(int j=0;j<3;j++){
int vID=IDtri.vID[j];//顶点号
if(markList[vID]==false){//未计算过
//重新计算
Cc3dVertex&v=meshData->vlist[vID];
switch (type) {
case type_LR:{
//用yz
Cc3dVector2 texCoord(v.getPos().y()*k_s,v.getPos().z()*k_t);
v.setTexCoord(texCoord);
}break;
case type_UD:{
//用xz
Cc3dVector2 texCoord(v.getPos().x()*k_s,v.getPos().z()*k_t);
v.setTexCoord(texCoord);
}break;
case type_FB:{
//用xy
Cc3dVector2 texCoord(v.getPos().x()*k_s,v.getPos().y()*k_t);
v.setTexCoord(texCoord);
}break;
}
//标记为已计算
markList[vID]=true;
}
}
}break;
default:
cout<<"error:未知的cubUV映射类型!"<<endl;
assert(false);
break;
}
}
return meshData;
}
