public void Test_DecodeTaggedShapes_DecodeFromByteString()
{
var index = MakeIndexOrDie(
"0:0 | 0:1 # 1:1, 1:2, 1:3 # 2:2; 2:3, 2:4, 3:3");
var polygon = MakePolygonOrDie("0:0, 0:4, 4:4, 4:0");
var polyline = MakePolylineOrDie("1:1, 1:2, 1:3");
index.Add(new S2LaxPolylineShape(polyline));
index.Add(new S2LaxPolygonShape(polygon));
var bytes = Convert.FromHexString(
"2932007C00E4002E0192010310000000000000F03F000000000000000000000000000000" +
"008AAFF597C0FEEF3F1EDD892B0BDF913F00000000000000000418B4825F3C81FDEF3F27" +
"DCF7C958DE913F1EDD892B0BDF913FD44A8442C3F9EF3FCE5B5A6FA6DDA13F1EDD892B0B" +
"DF913FAE0218F586F3EF3F3C3F66D2BBCAAA3F1EDD892B0BDF913F05010220FC7FB8B805" +
"F6EF3F28516A6D8FDBA13F27DCF7C958DEA13F96E20626CAEFEF3F4BF8A48399C7AA3F27" +
"DCF7C958DEA13F96B6DB0611E7EF3FC0221C80C6D8B13F27DCF7C958DEA13FE2337CCA8F" +
"E9EF3F6C573C9B60C2AA3F0EC9EF48C7CBAA3F0C0001040418B4825F3C81FDEF3F27DCF7" +
"C958DE913F1EDD892B0BDF913FD44A8442C3F9EF3FCE5B5A6FA6DDA13F1EDD892B0BDF91" +
"3FAE0218F586F3EF3F3C3F66D2BBCAAA3F1EDD892B0BDF913F05010120000000000000F0" +
"3F00000000000000000000000000000000F6FF70710BECEF3F28516A6D8FDBB13F000000" +
"00000000003C4A985423D8EF3F199E8D966CD0B13F28516A6D8FDBB13FF6FF70710BECEF" +
"3F000000000000000028516A6D8FDBB13F28C83900010003010403040504070400073807" +
"0E1B24292B3213000009030002130000110300092B00010001000000010D000002230410" +
"04020400020113082106110A4113000111030101");
Decoder decoder = new(bytes, 0, bytes.Length);
MutableS2ShapeIndex decoded_index = new();
decoded_index.Init(decoder, S2ShapeUtilCoding.FullDecodeShapeFactory(decoder));
Assert.Equal(S2TextFormat.ToDebugString(index),
S2TextFormat.ToDebugString(decoded_index));
}
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);
}
public void Test_FastEncodeTaggedShapes_MixedShapes()
{
// Tests encoding/decoding a collection of points, polylines, and polygons.
var index = MakeIndexOrDie(
"0:0 | 0:1 # 1:1, 1:2, 1:3 # 2:2; 2:3, 2:4, 3:3");
Encoder encoder = new();
S2ShapeUtilCoding.FastEncodeTaggedShapes(index, encoder);
index.Encode(encoder);
var decoder = encoder.Decoder();
MutableS2ShapeIndex decoded_index = new();
decoded_index.Init(decoder, S2ShapeUtilCoding.FullDecodeShapeFactory(decoder));
Assert.Equal(index.ToDebugString(), decoded_index.ToDebugString());
}
