void Shape::makeHollow(double wallthickness)
{
invertNormals();
const Vector3d wall(wallthickness,wallthickness,wallthickness);
Matrix4d invT = transform3D.getInverse();
vector<Triangle> cubet = cube(invT*Min-wall, invT*Max+wall);
triangles.insert(triangles.end(),cubet.begin(),cubet.end());
CalcBBox();
}
void Shape::setTriangles(const vector<Triangle> &triangles_)
{
triangles = triangles_;
CalcBBox();
double vol = volume();
if (vol < 0) {
invertNormals();
vol = -vol;
}
//PlaceOnPlatform();
cerr << _("Shape has volume ") << volume() << _(" mm^3 and ")
<< triangles.size() << _(" triangles") << endl;
}
/* Loads an binary STL file by filename
* Returns 0 on success and -1 on failure */
int Shape::loadBinarySTL(string filename) {
// if(getFileType(filename) != BINARY_STL) {
// return -1;
// }
triangles.clear();
Min.x = Min.y = Min.z = numeric_limits<double>::infinity();
Max.x = Max.y = Max.z = -numeric_limits<double>::infinity();
ifstream file;
file.open(filename.c_str());
if(file.fail()) {
cerr << _("Error: Unable to open stl file - ") << filename << endl;
return -1;
}
/* Binary STL files have a meaningless 80 byte header
* followed by the number of triangles */
file.seekg(80, ios_base::beg);
unsigned int num_triangles;
unsigned char buffer[4];
file.read(reinterpret_cast <char *> (buffer), 4);
// Read platform independent 32-bit little-endian int.
num_triangles = buffer[0] | buffer[1] << 8 | buffer[2] << 16 | buffer[3] << 24;
triangles.reserve(num_triangles);
for(uint i = 0; i < num_triangles; i++)
{
double a,b,c;
a = read_double (file);
b = read_double (file);
c = read_double (file);
Vector3d N(a,b,c);
a = read_double (file);
b = read_double (file);
c = read_double (file);
Vector3d Ax(a,b,c);
a = read_double (file);
b = read_double (file);
c = read_double (file);
Vector3d Bx(a,b,c);
a = read_double (file);
b = read_double (file);
c = read_double (file);
Vector3d Cx(a,b,c);
// done in Triangle
/* Recalculate normal vector - can't trust an STL file! */
// Vector3d AA=Cx-Ax;
// Vector3d BB=Cx-Bx;
// N = AA.cross(BB).getNormalized();
/* attribute byte count - sometimes contains face color
information but is useless for our purposes */
unsigned short byte_count;
file.read(reinterpret_cast <char *> (buffer), 2);
byte_count = buffer[0] | buffer[1] << 8;
// Repress unused variable warning.
(void)&byte_count;
Triangle T(Ax,Bx,Cx);
//cout << "bin triangle "<< N << ":\n\t" << Ax << "/\n\t"<<Bx << "/\n\t"<<Cx << endl;
triangles.push_back(T);
}
file.close();
CenterAroundXY();
scale_factor = 1.0;
scale_factor_x=scale_factor_y=scale_factor_z = 1.0;
double vol = volume();
if (vol < 0) {
invertNormals();
vol = -vol;
}
cout << _("Shape has volume ") << vol << " mm^3"<<endl;
return 0;
}
