本文整理汇总了C++中SplineSurface::ctrl_begin方法的典型用法代码示例。如果您正苦于以下问题：C++ SplineSurface::ctrl_begin方法的具体用法？C++ SplineSurface::ctrl_begin怎么用？C++ SplineSurface::ctrl_begin使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SplineSurface的用法示例。
在下文中一共展示了SplineSurface::ctrl_begin方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: main
int main(int argc, char** argv)
{
if (argc != 6)
{
cout << "Usage: " << argv[0] << " surfaceinfile surface3doutfile points3doutfile num_u num_v" << endl;
exit(-1);
}
ifstream filein(argv[1]);
ALWAYS_ERROR_IF(filein.bad(), "Bad or no curvee input filename");
ObjectHeader head;
filein >> head;
if (head.classType() != SplineSurface::classType()) {
THROW("Not a spline surface");
}
SplineSurface sf;
filein >> sf;
ofstream fileoutsurf(argv[2]);
ALWAYS_ERROR_IF(fileoutsurf.bad(), "Bad surface output filename");
ofstream fileoutpts(argv[3]);
ALWAYS_ERROR_IF(fileoutpts.bad(), "Bad points output filename");
int num_u = atoi(argv[4]);
int num_v = atoi(argv[5]);
vector<double> pts, param_u, param_v;
sf.gridEvaluator(num_u, num_v, pts, param_u, param_v);
vector<double> coefs3d;
vector<Point> pts3d;
int dim = sf.dimension();
bool rational = sf.rational();
int ctrl_pts = sf.numCoefs_u() * sf.numCoefs_v();
vector<double>::const_iterator it = sf.ctrl_begin();
for (int i = 0; i < ctrl_pts; ++i)
{
if (dim <= 3)
for (int j = 0; j < 3; ++j)
{
if (j>=dim)
coefs3d.push_back(0.0);
else
{
coefs3d.push_back(*it);
++it;
}
}
else
{
for (int j = 0; j < 3; ++j, ++it)
coefs3d.push_back(*it);
it += (dim-3);
}
if (rational)
{
coefs3d.push_back(*it);
++it;
}
}
int pts_pos = 0;
for (int i = 0; i < num_u*num_v; ++i)
{
double x, y, z;
if (dim == 0)
x = 0.0;
else
x = pts[pts_pos];
if (dim <= 1)
y = 0.0;
else
y = pts[pts_pos+1];
if (dim <= 2)
z = 0.0;
else
z = pts[pts_pos+2];
pts_pos += dim;
pts3d.push_back(Point(x, y, z));
}
SplineSurface sf3d(sf.basis_u(), sf.basis_v(), coefs3d.begin(), 3, rational);
sf3d.writeStandardHeader(fileoutsurf);
sf3d.write(fileoutsurf);
fileoutpts << "400 1 0 4 255 255 0 255" << endl;
fileoutpts << pts3d.size() << endl;
for (int i = 0; i < (int)pts3d.size(); ++i)
fileoutpts << pts3d[i] << endl;
}