public void Test_DecodeTaggedShapes_DecodeFromEncoded()
{
Encoder encoder = new();
// Make an encoded shape.
Assert.True(S2ShapeUtilCoding.FastEncodeShape(
new S2PointVectorShape(ParsePointsOrDie("0:0, 0:1").ToArray()),
encoder));
var decoder = encoder.Decoder();
var(success, encoded_shape) = EncodedS2PointVectorShape.Init(decoder);
// Encode the encoded form.
Encoder reencoder = new();
Assert.True(S2ShapeUtilCoding.FastEncodeShape(encoded_shape !, reencoder));
var encoded_decoder = reencoder.Decoder();
// We can decode the shape in either full or lazy form from the same bytes.
var full_shape = S2ShapeUtilCoding.FullDecodeShape(S2PointVectorShape.kTypeTag, encoded_decoder);
Assert.Equal(full_shape !.GetTypeTag(), S2PointVectorShape.kTypeTag);
encoded_decoder = reencoder.Decoder();
var lazy_shape = S2ShapeUtilCoding.LazyDecodeShape(S2PointVectorShape.kTypeTag, encoded_decoder);
Assert.Equal(lazy_shape !.GetTypeTag(), S2PointVectorShape.kTypeTag);
}
public void Test_FastEncodeShape_S2Polygon()
{
var polygon = MakePolygonOrDie("0:0, 0:1, 1:0");
var shape = new S2Polygon.Shape(polygon);
Encoder encoder = new();
S2ShapeUtilCoding.FastEncodeShape(shape, encoder);
var decoder = encoder.Decoder();
var shape2 = S2ShapeUtilCoding.FullDecodeShape(S2Shape.TypeTag.S2Polygon, decoder);
Assert.True(shape.Polygon == ((S2Polygon.Shape)shape2).Polygon);
}