public static void GetEdgeNodes(TabHandle feature, int part, out double startLongX, out double startLatY,
out double endLongX, out double endLatY)
{
int vCount = Mitab.mitab_c_get_vertex_count(feature, part);
startLongX = (double)Mitab.mitab_c_get_vertex_x(feature, part, 0);
startLatY = (double)Mitab.mitab_c_get_vertex_y(feature, part, 0);
endLongX = (double)Mitab.mitab_c_get_vertex_x(feature, part, vCount - 1);
endLatY = (double)Mitab.mitab_c_get_vertex_y(feature, part, vCount - 1);
}
public unsafe static void CheckProjectionLLWgs84(TabHandle mitabHandle)
{
TabHandle prj = Mitab.mitab_c_get_projinfo(mitabHandle);
byte * p = (byte *)prj;
if (p[0] != 1 && p[56] != 104)
{
Exception eb = new Exception("Invalid TAB projection. Table must be LL/Wgs84 (CoordSys 1,104)");
throw eb;
}
}
public MitabColumns(TabHandle mitabHandle)
{
// Contract.Requires<ArgumentException>(mitabHandle != 0);
for (int k = 0; k < Mitab.mitab_c_get_field_count(mitabHandle); k++)
{
Column c;
c.name = Mitab.mitab_c_get_field_name_csharp(mitabHandle, k);
c.type = Mitab.mitab_c_get_field_type(mitabHandle, k);
c.index = k;
columnlist.Add(c.name, c);
}
}
public static double[][] GetCoordsD(TabHandle feature, int part)
{
int vCount = Mitab.mitab_c_get_vertex_count(feature, part);
double[][] result = new double[vCount][];
for (int k = 0; k < vCount; k++)
{
double x = (double)Mitab.mitab_c_get_vertex_x(feature, part, k);
double y = (double)Mitab.mitab_c_get_vertex_y(feature, part, k);
result[k] = new double[2] {
x, y
};
}
return(result);
}
public static float[][] GetCoordsF(TabHandle feature, int part)
{
int vCount = Mitab.mitab_c_get_vertex_count(feature, part);
float[][] result = new float[vCount][];
for (int k = 0; k < vCount; k++)
{
float x = (float)Mitab.mitab_c_get_vertex_x(feature, part, k);
float y = (float)Mitab.mitab_c_get_vertex_y(feature, part, k);
result[k] = new float[2] {
x, y
};
}
return(result);
}
public static void GetCurrentCentroid(TabHandle feature, int part, out double cx, out double cy)
{
double x = 0, y = 0;
cx = 0; cy = 0;
int c = Mitab.mitab_c_get_vertex_count(feature, part);
cx = Mitab.mitab_c_get_vertex_x(feature, part, 0);
cy = Mitab.mitab_c_get_vertex_y(feature, part, 0);
for (int k = 1; k < c; k++)
{
x = Mitab.mitab_c_get_vertex_x(feature, part, k);
y = Mitab.mitab_c_get_vertex_y(feature, part, k);
cx = (cx + x) / 2;
cy = (cy + y) / 2;
}
}
public static int GetBiggestPart(TabHandle feature)
{
int partCount = Mitab.mitab_c_get_parts(feature);
int biggestPart = 0;
int biggestVCount = 0;
for (int part = 0; part < partCount; part++)
{
int vCount = Mitab.mitab_c_get_vertex_count(feature, part);
if (vCount >= biggestVCount)
{
biggestPart = part;
biggestVCount = vCount;
}
}
return(biggestPart);
}