public static void GetShapeMeshData(EntityCollidable collidable, List<VertexPositionNormalTexture> vertices, List<ushort> indices)
{
var convexHullShape = collidable.Shape as ConvexHullShape;
if (convexHullShape == null)
throw new ArgumentException("Wrong shape type.");
var hullTriangleVertices = new List<Vector3>();
var hullTriangleIndices = new List<int>();
ConvexHullHelper.GetConvexHull(convexHullShape.Vertices, hullTriangleIndices, hullTriangleVertices);
//The hull triangle vertices are used as a dummy to get the unnecessary hull vertices, which are cleared afterwards.
hullTriangleVertices.Clear();
foreach (int i in hullTriangleIndices)
{
hullTriangleVertices.Add(convexHullShape.Vertices[i]);
}
var toReturn = new VertexPositionNormalTexture[hullTriangleVertices.Count];
Vector3 normal;
for (ushort i = 0; i < hullTriangleVertices.Count; i += 3)
{
normal = Vector3.Normalize(Vector3.Cross(hullTriangleVertices[i + 2] - hullTriangleVertices[i], hullTriangleVertices[i + 1] - hullTriangleVertices[i]));
vertices.Add(new VertexPositionNormalTexture(hullTriangleVertices[i], normal, new Vector2(0, 0)));
vertices.Add(new VertexPositionNormalTexture(hullTriangleVertices[i + 1], normal, new Vector2(1, 0)));
vertices.Add(new VertexPositionNormalTexture(hullTriangleVertices[i + 2], normal, new Vector2(0, 1)));
indices.Add(i);
indices.Add((ushort)(i + 1));
indices.Add((ushort)(i + 2));
}
}
}
