//------------------------------------------------------------------------------
// create
private void create()
{
int u;
int v;
_point = new Vectors[_n][];
for (v = 0; v < _n; v++)
{
_point[v] = new Vectors[_m];
for (u = 0; u < _m; u++)
{
_point[v][u] = new Vectors((double)u / (double)(_m - 1) - 0.5,
(double)v / (double)(_n - 1) - 0.5, 0.0);
}
}
_patch = new Patch3D[_n - 1][];
for (v = 0; v < _n - 1; v++)
{
_patch[v] = new Patch3D[_m - 1];
for (u = 0; u < _m - 1; u++)
{
_patch[v][u] = new Patch3D(u, v, _tiles);
}
}
}
//------------------------------------------------------------------------------
// copy
private void copy(Patch3D patch3D)
{
_u = patch3D._u;
_v = patch3D._v;
_valid = patch3D._valid;
_tiles = patch3D._tiles;
for (int i = 0; i < C.CONST.ORDER; i++)
{
for (int j = 0; j < C.CONST.ORDER; j++)
{
_matrix[i][j] = patch3D._matrix[i][j];
}
}
create();
for (int v = 0; v < (_tiles + 1); v++)
{
for (int u = 0; u < (_tiles + 1); u++)
{
_vertex[v][u] = patch3D._vertex[v][u];
_normal[v][u] = patch3D._normal[v][u];
}
}
}
//------------------------------------------------------------------------------
// copy constructor
public Patch3D(Patch3D patch3D)
{
copy(patch3D);
}
//------------------------------------------------------------------------------
// remove
public void remove()
{
if (_u > 0 && _u < _m - 1 && _v > 0 && _v < _n - 1 && _m > 2 && _n > 2)
{
int u;
int v;
// copy old z
int nOld = _n;
Vectors[][] pointOld = _point;
for (v = 0; v < _n; v++)
{
pointOld[v] = _point[v];
for (u = 0; u < _m; u++)
{
pointOld[v][u] = _point[v][u];
}
}
for (v = 0; v < _n - 1; v++)
{
for (u = 0; u < _m - 1; u++)
{
_patch[v][u] = null;
}
_patch[v] = null;
}
_patch = null;
_m--;
_n--;
// create new z
_point = new Vectors[_n][];
for (v = 0; v < _n; v++)
{
_point[v] = new Vectors[_m];
for (u = 0; u < _m; u++)
{
if (v < _v)
{
if (u < _u)
{
_point[v][u] = pointOld[v][u];
}
else
{
_point[v][u] = pointOld[v][u + 1];
}
}
else
{
if (u < _u)
{
_point[v][u] = pointOld[v + 1][u];
}
else
{
_point[v][u] = pointOld[v + 1][u + 1];
}
}
}
}
_patch = new Patch3D[_n - 1][];
for (v = 0; v < _n - 1; v++)
{
_patch[v] = new Patch3D[_m - 1];
for (u = 0; u < _m - 1; u++)
{
_patch[v][u] = new Patch3D(u, v, _tiles);
}
}
// erase old z
for (v = 0; v < nOld; v++)
{
pointOld[v] = null;
}
pointOld = null;
_u--;
_v--;
}
}
//------------------------------------------------------------------------------
// insert
public void insert()
{
if (_u < _m - 1 && _v < _n - 1)
{
int u;
int v;
// copy old z
int nOld = _n;
Vectors[][] pointOld = _point;
for (v = 0; v < _n; v++)
{
pointOld[v] = _point[v];
for (u = 0; u < _m; u++)
{
pointOld[v][u] = _point[v][u];
}
}
_m++;
_n++;
// create new z
_point = new Vectors[_n][];
for (v = 0; v < _n; v++)
{
_point[v] = new Vectors[_m];
for (u = 0; u < _m; u++)
{
if (v <= _v)
{
if (u <= _u)
{
_point[v][u] = pointOld[v][u];
}
else if (u == _u + 1)
{
_point[v][u] = 0.5d * (pointOld[v][u - 1] + pointOld[v][u]);
}
else
{
_point[v][u] = pointOld[v][u - 1];
}
}
else if (v == _v + 1)
{
if (u <= _u)
{
_point[v][u] = 0.5d * (pointOld[v - 1][u] + pointOld[v][u]);
}
else if (u == _u + 1)
{
_point[v][u] = 0.25d * (pointOld[v - 1][u - 1] + pointOld[v - 1][u]
+ pointOld[v][u - 1] + pointOld[v][u]);
}
else
{
_point[v][u] = 0.5d * (pointOld[v - 1][u - 1] + pointOld[v][u - 1]);
}
}
else
{
if (u <= _u)
{
_point[v][u] = pointOld[v - 1][u];
}
else if (u == _u + 1)
{
_point[v][u] = 0.5d * (pointOld[v - 1][u - 1] + pointOld[v - 1][u]);
}
else
{
_point[v][u] = pointOld[v - 1][u - 1];
}
}
}
}
// erase patch
for (v = 0; v < _n - 2; v++)
{
for (u = 0; u < _m - 2; u++)
{
_patch[v][u] = null;
}
_patch[v] = null;
}
_patch = null;
// create patch
_patch = new Patch3D[_n - 1][];
for (v = 0; v < _n - 1; v++)
{
_patch[v] = new Patch3D[_m - 1];
for (u = 0; u < _m - 1; u++)
{
_patch[v][u] = new Patch3D(u, v, _tiles);
}
}
// erase old z
for (v = 0; v < nOld; v++)
{
pointOld[v] = null;
}
pointOld = null;
_u++;
_v++;
}
}