What triangles do the Ks correspond to, the triangles before the edge collapse or the triangles after the edge collapse?
ngandhi
I believe before the edge collapse? Because we have K_i and K_j which correspond to the i and j vertices.
keenan
$K_i$ and $K_j$ are the quadrics stored at vertices $i$ and $j$ (resp.) before the collapse. These vertex quadrics could be the sum of quadrics from all triangles around those vertices, or they could result from earlier edge collapses.
xiaol3
We are calculating the quadratic error of x to the triangles before the collapse.
What triangles do the Ks correspond to, the triangles before the edge collapse or the triangles after the edge collapse?
I believe before the edge collapse? Because we have K_i and K_j which correspond to the i and j vertices.
$K_i$ and $K_j$ are the quadrics stored at vertices $i$ and $j$ (resp.) before the collapse. These vertex quadrics could be the sum of quadrics from all triangles around those vertices, or they could result from earlier edge collapses.
We are calculating the quadratic error of x to the triangles before the collapse.