STL文件读入函数ReadSTLFile()的定义

void ReadSTLFile(){

//打开，读入文件

CFileDialog dlg(TRUE,NULL,NULL,

OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,\"平板印刷(*.stl)|*.stl|\

if(dlg.DoModal()!=IDOK)

return;

CString lpszPathName=dlg.GetFileName();

inFile.Open(lpszPathName, CFile::modeRead); //open file

inFile.ReadString(cstr); //read \"solid ***\"

inFile.ReadString(cstr); //read the first normal vector line

checkstr=cstr[3]; // ensure the normal vector line exists

// if exist, the third charecter must be \"f\" of \" facet\"

while (checkstr==cstr[3]){

//读入三角面片的法向量

//in order to get the first vector number

cstr.TrimLeft(\" facet normal \");

for (int i = 0; cstr[i] != ' '; i++) //the first number is end before a \" \"

cstrtemp = cstrtemp + cstr[i]; //store all the numbers needed

vect.x = (float)atof(cstrtemp); //translate string into float

cstrtemp.Empty();

for (i++; cstr[i] != ' '; i++) //the second number is also end before a \" \"

cstrtemp = cstrtemp + cstr[i];

vect.y = (float)atof(cstrtemp);

cstrtemp.Empty();

//the third number is end when the line ends

for (i++; i < cstr.GetLength(); i++)

cstrtemp = cstrtemp + cstr[i];

vect.z = (float)atof(cstrtemp);

cstrtemp.Empty();

volume.STLVectorArray.Add(vect); //add the vector to the array

inFile.ReadString(cstr); //read \"outer loop\"

//读入顶点坐标

for (i = 0; i < 3; i++){ //there are three vectors in a vertex

inFile.ReadString(cstr); //read the vertex line

//the following is similar to the method getting normal vector

cstr.TrimLeft(\" vertex \");

//读入X

for (int j = 0; cstr[j] != ' '; j++)

cstrtemp = cstrtemp + cstr[j];

STL_X.X = (float)atof(cstrtemp);

kp.X = STL_X.X;

cstrtemp.Empty();

//读入Y

for (j++; cstr[j] != ' '; j++)

cstrtemp = cstrtemp + cstr[j];

STL_Y.Y = (float)atof(cstrtemp);

kp.Y = STL_Y.Y;

cstrtemp.Empty();

//读入Z

for (j++; j < cstr.GetLength(); j++)

cstrtemp = cstrtemp + cstr[j];

STL_Z.Z = (float)atof(cstrtemp);

kp.Z = STL_Z.Z;

cstrtemp.Empty();

//将kp加入到volume.VolumeKeyPointArray中

volume.VolumeKeyPointArray.Add(kp);

//store the vectex in the array

/*接下来，调用函数StoreTheValue()将STL_X，STL_Y，STL_Z分别加入到STL_XArray，STL_XArray数组中的STL_X所对应的STL_YArray，STL_YArray数组中的STL_Y所对应的STL_ZArray中去。STL_XArray，STL_YArray,STL_ZArray都是按照从小到大排序的数组。StoreTheValue()的实现参见第六章的文献[23]*/

StoreTheValue();

}

inFile.ReadString(cstr); //read \"end loop\"

inFile.ReadString(cstr); //read \"end facet\"

inFile.ReadString(cstr); //read the next normal vector

}

}