本文整理汇总了C++中LMESHptr::lv方法的典型用法代码示例。如果您正苦于以下问题：C++ LMESHptr::lv方法的具体用法？C++ LMESHptr::lv怎么用？C++ LMESHptr::lv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LMESHptr的用法示例。
在下文中一共展示了LMESHptr::lv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: C
void
fit(LMESHptr& mesh, bool do_gauss_seidel)
{
if (mesh->empty())
return;
// time this
stop_watch clock;
double max_err = mesh->get_bb().dim().length() * 1e-5;
int n = mesh->nverts();
// get original control point locations
Wpt_list C(n); // original control points
Wpt_list L(n); // current limit points
for (int i=0; i<n; i++) {
C += mesh->bv(i)->loc();
L += Wpt::Origin();
}
// do 50 iterations...
double prev_err = 0;
for (int k=0; k<50; k++) {
double err = 0;
if (do_gauss_seidel) {
// Gauss-Seidel iteration: use updated values from the
// current iteration as they are computed...
for (int j=0; j<n; j++) {
// don't need that L[] array...
Wpt limit;
mesh->lv(j)->limit_loc(limit);
Wvec delt = C[j] - limit;
err += delt.length();
mesh->bv(j)->offset_loc(delt);
}
} else {
// compute the new offsets from the offsets computed in the
// previous iteration
int j;
for (j=0; j<n; j++)
mesh->lv(j)->limit_loc(L[j]);
for (j=0; j<n; j++) {
Wvec delt = C[j] - L[j];
err += delt.length();
mesh->bv(j)->offset_loc(delt);
}
}
// compute the average error:
err /= n;
if (prev_err != 0) {
err_msg("Iter %d: avg error: %f, reduction: %f",
k, err, err/prev_err);
} else {
err_msg("Iter %d: avg error: %f", k, err);
}
prev_err = err;
if (err < max_err)
break;
}
err_msg("fitting took %.2f seconds", clock.elapsed_time());
}