Create a body of a irregular 2D sprite in Farseer

Question

Im trying to create a body of a irregular 2D sprite Farseer 3.3.1. Could it be done with using BodyFactory.CreateCompoundPolygon method?

Answer 1

this is a method from one of my projects. Its a little specific to my architecture but should be usable for yourself.

One thing to consider is the scaling. You would be best to replace this with the ConvertUnits.ToSimUnits etc which I am sure you are familiar with.

       public static Body CreateBodyFromImage(Game game, World world, string textureName)
    {
        //Load the passed texture.
        Texture2D polygonTexture = game.Content.Load<Texture2D>(textureName);

        //Use an array to hold the textures data.
        uint[] data = new uint[polygonTexture.Width * polygonTexture.Height];

        //Transfer the texture data into the array.
        polygonTexture.GetData(data);

        //Find the verticals that make up the outline of the passed texture shape.
        Vertices vertices = PolygonTools.CreatePolygon(data, polygonTexture.Width);

        //For now we need to scale the vertices (result is in pixels, we use meters)
        Vector2 scale = new Vector2(0.07f, 0.07f);
        vertices.Scale(ref scale);

        //Partition the concave polygon into a convex one.
        var decomposedVertices = BayazitDecomposer.ConvexPartition(vertices);

        //Create a single body, that has multiple fixtures to the polygon shapes.
        return BodyFactory.CreateCompoundPolygon(world, decomposedVertices, 1f);

    }