private static string Svg(IEnumerable<IEnumerable<IntPoint>> shapes)
{
var b = new SvgBuilder();
foreach (var shape in shapes)
b = b.Outline(shape.Select(a => new Vector2(a.X, a.Y)).ToArray());
return b.ToString();
}
static void Main(string[] args)
{
Stopwatch w = new Stopwatch();
w.Start();
var ssk = StraightSkeleton.Generate(new Vector2[] {
new Vector2(-10, 10),
new Vector2(-1, 10),
new Vector2(0, 11),
new Vector2(1, 10),
new Vector2(10, 10),
new Vector2(10, -2),
new Vector2(5, 0),
new Vector2(7, -10),
new Vector2(-7, -10),
new Vector2(-5, 0),
new Vector2(-10, -2),
}, new Vector2[][] {
new Vector2[] {
new Vector2(2, 2),
new Vector2(2, -2),
new Vector2(-2, -2),
new Vector2(-2, 2)
}
});
w.Stop();
Stopwatch w2 = new Stopwatch();
w2.Start();
//Extract data from result
var builder = new SvgBuilder(30);
//Draw outline
foreach (var edge in ssk.Borders)
{
builder.Circle(edge.Start.Position, 0.2f, "blue");
builder.Circle(edge.End.Position, 0.2f, "blue");
builder.Line(edge.Start.Position, edge.End.Position, 2, "blue");
}
//Draw offsets
for (var i = 1; i < 10; i++)
{
var offset = ssk.Offset(i / 2f);
foreach (var polygon in offset)
builder.Outline(polygon, "green");
}
//Draw spokes
foreach (var edge in ssk.Spokes)
builder.Line(edge.Start.Position, edge.End.Position, 4, "lime");
//Draw straight skeleton
foreach (var edge in ssk.Skeleton)
{
builder.Circle(edge.Start.Position, 0.2f, "hotpink");
builder.Circle(edge.End.Position, 0.2f, "hotpink");
builder.Line(edge.Start.Position, edge.End.Position, 2, "hotpink");
}
Console.WriteLine(builder);
Console.Title = string.Format("Elapsed: {0}ms {1}ms", w.ElapsedMilliseconds, w2.ElapsedMilliseconds);
Console.ReadLine();
}