void PMTorus::createLines( PMLineArray& lines, int uStep, int vStep )
{
int u, v;
for( u = 0; u < uStep; ++u )
{
for( v = 0; v < vStep; ++v )
{
lines[ u * vStep + v ] = PMLine( u * vStep + v, u * vStep + ( (v+1) % vStep ) );
lines[ uStep * vStep + u * vStep + v ] = PMLine( u * vStep + v, ( (u+1) % uStep ) * vStep + v );
}
}
}
void PMCone::createLines( PMLineArray& lines, int steps )
{
int i;
for( i = 0; i < ( steps - 1 ); i++ )
{
lines[i] = PMLine( i, i + 1 );
lines[i + steps] = PMLine( i + steps, i + steps+ 1 );
}
lines[steps - 1] = PMLine( steps - 1, 0 );
lines[steps * 2 - 1] = PMLine( steps * 2 - 1, steps );
for( i = 0; i < steps; i++ )
{
lines[i + 2 * steps] = PMLine( i, i + steps );
}
}
void PMSuperquadricEllipsoid::createLines( PMLineArray& lines, int uStep, int vStep )
{
int u, v;
int offset = 0;
// horizontal lines
for( u = 0; u < ( uStep - 1 ); u++ )
{
for( v = 0; v < ( vStep - 1 ); v++ )
lines[offset + v] =
PMLine( u * vStep + v + 1, u * vStep + v + 2 );
lines[offset + vStep - 1] =
PMLine( u * vStep + 1, u * vStep + vStep );
offset += vStep;
}
// vertical lines
// lines at the "north pole"
for( v = 0; v < vStep; v++ )
lines[offset + v] = PMLine( 0, v + 1 );
offset += vStep;
for( v = 0; v < vStep; v++ )
{
for( u = 0; u < ( uStep - 2 ); u++ )
{
lines[offset + u] =
PMLine( u * vStep + v + 1, ( u + 1 ) * vStep + v + 1 );
}
offset += ( uStep - 2 );
}
// lines at the "south pole"
for( v = 0; v < vStep; v++ )
lines[offset + v] = PMLine( ( uStep - 2 ) * vStep + v + 1,
( uStep - 1 ) * vStep + 1 );
// offset += vStep;
}