无法将类型'System.Collections.Generic.List'隐式转换为'FarseerPhysics.Dynamics.Fixture'

Question

当我尝试将灯具连接到主体时，我总是在此行中收到此错误消息。

Fixture Newfixture = FixtureFactory.AttachCompoundPolygon(list, 1.0f, TestBody);

无法将类型'System.Collections.Generic.List'隐式转换为'FarseerPhysics.Dynamics.Fixture'

如何创建灯具并将其贴在车身上？是否可以将多个固定装置连接到身体上？

我的其余代码：

List<Vertices> list = new List<Vertices>();
Vector2 _origin;
float _scale;

uint[] data = new uint[Sprite.Width * Sprite.Height];
Sprite.GetData(data);
Vertices textureVertices = PolygonTools.CreatePolygon(data, Sprite.Width, false);
Vector2 centroid = -textureVertices.GetCentroid();
textureVertices.Translate(ref centroid);
_origin = -centroid;
textureVertices = SimplifyTools.ReduceByDistance(textureVertices, 4f);
list = Triangulate.ConvexPartition(textureVertices, TriangulationAlgorithm.Bayazit);
_scale = 1f;
Vector2 vertScale = new Vector2(ConvertUnits.ToSimUnits(1)) * _scale;
foreach (Vertices vertices in list)
{
  vertices.Scale(ref vertScale);
}

Answer 1

Fixture Newfixture = FixtureFactory.AttachCompoundPolygon(list, 1.0f, TestBody);

这行代码返回List<Fixture> 这是FixtureFactory源代码中的方法签名。

public static List<Fixture> AttachCompoundPolygon(List<Vertices> list, float density, Body body)

所以你回来了List<Fixture>。如果你想获得该列表中的第一个项目（可能是这种情况，因为你假设那里只有一个），那么

    Fixture Newfixture = FixtureFactory.AttachCompoundPolygon(list, 1.0f, TestBody).First();