//-------------------------------------------------------------------------
FKCW_3D_Mesh* CreateConeMesh(float r,float h,int nSlice,int nStack,bool isHaveBottom,
const FKCW_3D_Vector4&headColor,const FKCW_3D_Vector4&bottomColor)
//why cone need nStack ? because even a plane need subdivision to achieve better specular effect
{
float dA=360.0f/nSlice;
const float PIDIV180= static_cast<float>(M_PI/180.0f);
vector<FKCW_3D_Vector4> positionList;
vector<FKCW_3D_Vector2> texCoordList;
vector<FKCW_3D_Vector4> normalList;
vector<FKCW_3D_Vector4> colorList;
vector<FKCW_3D_IDTriangle> IDtriList;
//----generate side
//generate positionList, texCoordList, normalList, colorList
for(int i=0;i<=nStack;i++){
float y=i*h/nStack;
for (int j=0; j<=nSlice; j++) {
float A=j*dA;
float R=r-i*r/nStack;
float cosA=cosf(A*PIDIV180);
float sinA=sinf(A*PIDIV180);
float x=R*cosA;
float z=R*sinA;
FKCW_3D_Vector4 position(x,y,z,1);
float s=(float)j/nSlice+0.25f;
float t=1-(float)i/nStack;
FKCW_3D_Vector2 texCoord(s,t);
float ny=r/sqrtf(FKCW_Square(h)+FKCW_Square(r));
float nx,nz;//nx*nx+ny*ny+nz*nz=1 and nx:nz=cosA:sinA => k=sqrt((1-ny*ny)/(cosA*cosA+sinA*sinA)), nx=cosA*k, nz=sinA*k
float k=sqrtf((1-ny*ny)/(cosA*cosA+sinA*sinA));
nx=cosA*k;
nz=sinA*k;
FKCW_3D_Vector4 normal=normalize(FKCW_3D_Vector4(nx,ny,nz,0));
FKCW_3D_Vector4 color=bottomColor*(1-(float)i/nStack)+headColor*((float)i/nStack);
positionList.push_back(position);
texCoordList.push_back(texCoord);
normalList.push_back(normal);
colorList.push_back(color);
}
}
//generate IDtriList
for(int i=0;i<nStack;i++){
for(int j=0;j<nSlice;j++){
int vID_ld=(nSlice+1)*i+j;
int vID_rd=vID_ld+1;
int vID_ru=vID_rd+(nSlice+1);
int vID_lu=vID_ru-1;
FKCW_3D_IDTriangle IDtri0(vID_ld,vID_rd,vID_ru);
FKCW_3D_IDTriangle IDtri1(vID_ld,vID_ru,vID_lu);
IDtriList.push_back(IDtri0);
IDtriList.push_back(IDtri1);
}
}
//----generate bottom
if(isHaveBottom){
vector<FKCW_3D_Vector4> _positionList=positionList;
vector<FKCW_3D_Vector2> _texCoordList=texCoordList;
vector<FKCW_3D_Vector4> _normalList=normalList;
vector<FKCW_3D_Vector4> _colorList=colorList;
vector<FKCW_3D_IDTriangle> _IDtriList=IDtriList;
//all postion in _positionList set y to zero
int _nPosition=(int)_positionList.size();
for(int i=0;i<_nPosition;i++){
FKCW_3D_Vector4&position=_positionList[i];
position.sety(0);
}
//all normal in _normalList set to (0,-1,0,0)
int _nNormal=(int)_normalList.size();
for(int i=0;i<_nNormal;i++){
FKCW_3D_Vector4&normal=_normalList[i];
normal=FKCW_3D_Vector4(0, -1, 0, 0);
}
//all index in _IDtriList should be plus offset=(int)positionList.size()
const int offset=(int)positionList.size();
int _nIDtri=(int)_IDtriList.size();
for(int i=0;i<_nIDtri;i++){
FKCW_3D_IDTriangle&IDtri=_IDtriList[i];
int ID0=IDtri.vID(0);
int ID1=IDtri.vID(1);
int ID2=IDtri.vID(2);
IDtri.init(ID0+offset, ID1+offset, ID2+offset);
}
//connect side and bottom
positionList=connectList(positionList,_positionList);
texCoordList=connectList(texCoordList,_texCoordList);
normalList=connectList(normalList,_normalList);
colorList=connectList(colorList,_colorList);
IDtriList=connectList(IDtriList,_IDtriList);
}
//----create mesh
FKCW_3D_SubMeshData*subMeshData=new FKCW_3D_SubMeshData();
subMeshData->autorelease();
subMeshData->init();
subMeshData->initPositionList(positionList);
subMeshData->initTexCoordList(texCoordList);
subMeshData->initNormalList(normalList);
subMeshData->initColorList(colorList);
subMeshData->initIDtriList(IDtriList);
FKCW_3D_SubMesh* subMesh=new FKCW_3D_SubMesh();
subMesh->autorelease();
subMesh->init();
subMesh->setSubMeshData(subMeshData);
FKCW_3D_Mesh* mesh=new FKCW_3D_Mesh();
mesh->autorelease();
mesh->init();
mesh->addSubMesh(subMesh);
return mesh;
}
void Cball::makeBall(float r,int nSlice,int nStack,string texFilePath){
//make ball
float dA=360.0/nSlice;
float dB=180.0/nStack;
const float PIDIV180=c3d_PI/180;
vector<Cc3dVector4> positionList;
vector<Cc3dVector2> texCoordList;
vector<Cc3dVector4> normalList;
vector<Cc3dIDTriangle> IDtriList;
//generate positionList, texCoordList, normalList, colorList
for(int i=0;i<=nStack;i++){
float B=-90+i*dB;
float y=r*sinf(B*PIDIV180);
float cosB=cosf(B*PIDIV180);
for (int j=0; j<=nSlice; j++) {
float A=j*dA;
float R=r*cosB;
float x=R*cosf(A*PIDIV180);
float z=R*sinf(A*PIDIV180);
Cc3dVector4 position(x,y,z,1);
float s=(float)j/nSlice+0.25;
float t=1-(float)i/nStack;
Cc3dVector2 texCoord(s,t);
Cc3dVector4 normal=normalize(cc3dv4(position.x(), position.y(), position.z(), 0));
positionList.push_back(position);
texCoordList.push_back(texCoord);
normalList.push_back(normal);
}
}
//generate IDtriList
for(int i=0;i<nStack;i++){
for(int j=0;j<nSlice;j++){
int vID_ld=(nSlice+1)*i+j;
int vID_rd=vID_ld+1;
int vID_ru=vID_rd+(nSlice+1);
int vID_lu=vID_ru-1;
Cc3dIDTriangle IDtri0(vID_ld,vID_rd,vID_ru);
Cc3dIDTriangle IDtri1(vID_ld,vID_ru,vID_lu);
IDtriList.push_back(IDtri0);
IDtriList.push_back(IDtri1);
}
}
Cc3dSubMesh*subMesh=new Cc3dSubMesh();
subMesh->autorelease();
int nPos=(int)positionList.size();
for(int i=0;i<nPos;i++){
Cc3dVector4&pos=positionList[i];
Cc3dVector2&texCoord=texCoordList[i];
Cc3dVector4&norm=normalList[i];
subMesh->addVertex(Cc3dVertex(pos,texCoord,norm));
}
int nIDtri=(int)IDtriList.size();
for(int i=0;i<nIDtri;i++){
Cc3dIDTriangle&IDtri=IDtriList[i];
subMesh->addIDtri(IDtri);
}
//--texture
if(texFilePath.empty()==false){
Cc3dTexture*texture=Cc3dTextureCache::sharedTextureCache()->addImage(texFilePath,GL_CLAMP_TO_EDGE,GL_CLAMP_TO_EDGE);
subMesh->setTexture(texture);
}
//----mesh
Cc3dMesh*mesh=new Cc3dMesh();
mesh->autorelease();
mesh->addSubMesh(subMesh);
//----model
this->addMesh(mesh);
}
//-------------------------------------------------------------------------
FKCW_3D_Mesh* CreateBallMesh(float r,int nSlice,int nStack,
const FKCW_3D_Vector4&northPoleColor,const FKCW_3D_Vector4&southPoleColor)
{
float dA=360.0f/nSlice;
float dB=180.0f/nStack;
const float PIDIV180=static_cast<float>(M_PI/180.0f);
vector<FKCW_3D_Vector4> positionList;
vector<FKCW_3D_Vector2> texCoordList;
vector<FKCW_3D_Vector4> normalList;
vector<FKCW_3D_Vector4> colorList;
vector<FKCW_3D_IDTriangle> IDtriList;
//generate positionList, texCoordList, normalList, colorList
for(int i=0;i<=nStack;i++){
float B=-90+i*dB;
float y=r*sinf(B*PIDIV180);
float cosB=cosf(B*PIDIV180);
for (int j=0; j<=nSlice; j++) {
float A=j*dA;
float R=r*cosB;
float x=R*cosf(A*PIDIV180);
float z=R*sinf(A*PIDIV180);
FKCW_3D_Vector4 position(x,y,z,1);
float s=(float)j/nSlice+0.25f;
float t=1-(float)i/nStack;
FKCW_3D_Vector2 texCoord(s,t);
FKCW_3D_Vector4 normal=normalize(FKCW_3D_Vector4(position.x(), position.y(), position.z(), 0));
FKCW_3D_Vector4 color=southPoleColor*(1-(float)i/nStack)+northPoleColor*((float)i/nStack);
positionList.push_back(position);
texCoordList.push_back(texCoord);
normalList.push_back(normal);
colorList.push_back(color);
}
}
//generate IDtriList
for(int i=0;i<nStack;i++){
for(int j=0;j<nSlice;j++){
int vID_ld=(nSlice+1)*i+j;
int vID_rd=vID_ld+1;
int vID_ru=vID_rd+(nSlice+1);
int vID_lu=vID_ru-1;
FKCW_3D_IDTriangle IDtri0(vID_ld,vID_rd,vID_ru);
FKCW_3D_IDTriangle IDtri1(vID_ld,vID_ru,vID_lu);
IDtriList.push_back(IDtri0);
IDtriList.push_back(IDtri1);
}
}
FKCW_3D_SubMeshData*subMeshData=new FKCW_3D_SubMeshData();
subMeshData->autorelease();
subMeshData->init();
subMeshData->initPositionList(positionList);
subMeshData->initTexCoordList(texCoordList);
subMeshData->initNormalList(normalList);
subMeshData->initColorList(colorList);
subMeshData->initIDtriList(IDtriList);
FKCW_3D_SubMesh* subMesh=new FKCW_3D_SubMesh();
subMesh->autorelease();
subMesh->init();
subMesh->setSubMeshData(subMeshData);
FKCW_3D_Mesh* mesh=new FKCW_3D_Mesh();
mesh->autorelease();
mesh->init();
mesh->addSubMesh(subMesh);
return mesh;
}
