/// <summary></summary>
public List<MeepBlock> FromPolygon(PointD[] vertices)
{
List<MeepBlock> list = new List<MeepBlock>();
PointD[] tetragon;
for( int i = 0 ; i < vertices.Length / 2 - 1 ; i++ )
{
tetragon = new PointD[4];
tetragon[0] = vertices[i];
tetragon[1] = vertices[i + 1];
tetragon[2] = vertices[vertices.Length - i - 2];
tetragon[3] = vertices[vertices.Length - i - 1];
foreach( MeepBlock geometricObj in FromTetragon( tetragon ) )
list.Add( geometricObj );
}
return list;
}
/// <summary></summary>
public List<MeepBlock> FromTetragon(PointD[] vertices)
{
if( vertices.Length != 4 ) throw new ArgumentException();
List<MeepBlock> list = new List<MeepBlock>();
List<PointD> _vertices = new List<PointD>(); // 三角形判定用リスト
for( int i = 4 ; i < 8 ; i++ )
if( vertices[i % 4] != vertices[( i - 1 ) % 4] )
_vertices.Add( vertices[i % 4] );
if( _vertices.Count == 3 )
foreach( MeepBlock geometricObj in FromTriangle( _vertices.ToArray() ) )
list.Add( geometricObj );
if( _vertices.Count == 4 )
{
foreach( MeepBlock geometricObj in FromTriangle( new[] { vertices[0], vertices[1], vertices[2] } ) )
list.Add( geometricObj );
foreach( MeepBlock geometricObj in FromTriangle( new[] { vertices[2], vertices[3], vertices[0] } ) )
list.Add( geometricObj );
}
return list;
}
private static bool Equals(PointD a, PointD b)
{
return Math.Sqrt( Math.Pow( a.X - b.X, 2 ) + Math.Pow( a.Y - b.Y, 2 ) ) <= Accuracy;
}
private MeepVector3 Convert(PointD p, double z) { return new MeepVector3( p.X, p.Y, z ); }
/// <summary></summary>
public MeepBlock FromParallelogram(PointD origin, SizeD vector1, SizeD vector2)
{
MeepVector3 center = Convert( origin + 0.5 * vector1 + 0.5 * vector2, CenterZ );
MeepVector3 size = new MeepVector3( vector1.Magnitude, vector2.Magnitude, SizeZ );
return new MeepBlock( MeepMaterial, center, size )
{
E1 = Convert( ( 1 / vector1.Magnitude ) * vector1, 0 ),
E2 = Convert( ( 1 / vector2.Magnitude ) * vector2, 0 ),
E3 = MeepVector3.AxisZ,
};
}
/// <summary></summary>
public List<MeepBlock> FromTriangle(PointD[] vertices)
{
if( vertices.Length != 3 ) throw new ArgumentException();
List<MeepBlock> list = new List<MeepBlock>();
if( vertices[0] == vertices[1] || vertices[1] == vertices[2] ) return list;
list.Add( FromParallelogram( vertices[0], 0.5 * ( vertices[1] - vertices[0] ), 0.5 * ( vertices[2] - vertices[0] ) ) );
list.Add( FromParallelogram( vertices[1], 0.5 * ( vertices[2] - vertices[1] ), 0.5 * ( vertices[0] - vertices[1] ) ) );
list.Add( FromParallelogram( vertices[2], 0.5 * ( vertices[0] - vertices[2] ), 0.5 * ( vertices[1] - vertices[2] ) ) );
return list;
}
