public static void test_arrangement_stress()
{
Random r = new Random(31337);
Arrangement2d builder = new Arrangement2d(new AxisAlignedBox2d(1024.0));
Polygon2d circ = Polygon2d.MakeCircle(512, 33);
builder.Insert(circ);
// crazy stress-test
for (int k = 0; k < 1000; ++k)
{
var pts = TestUtil.RandomPoints2(2, r, circ.Bounds.Center, 800);
builder.Insert(new Segment2d(pts[0], pts[1]));
}
//TestUtil.WriteTestOutputGraph(builder.Graph, "graph_complex.svg");
}
public static void test_arrangement_demo()
{
DMesh3 mesh = TestUtil.LoadTestInputMesh("spheres_and_planes.obj");
MeshTransforms.Scale(mesh, 8);
AxisAlignedBox3d meshBounds = mesh.CachedBounds;
Vector3d origin = meshBounds.Center;
double simplify_thresh = 5.0;
Frame3f plane = new Frame3f(origin, Vector3d.AxisY);
MeshPlaneCut cut = new MeshPlaneCut(mesh, plane.Origin, plane.Z);
cut.Cut();
Arrangement2d builder = new Arrangement2d(new AxisAlignedBox2d(1024.0));
// insert all cut edges
HashSet <Vector2d> srcpts = new HashSet <Vector2d>();
foreach (EdgeLoop loop in cut.CutLoops)
{
Polygon2d poly = new Polygon2d();
foreach (int vid in loop.Vertices)
{
poly.AppendVertex(mesh.GetVertex(vid).xz);
}
poly.Simplify(simplify_thresh, 0.01, true);
foreach (Vector2d v in poly.Vertices)
{
srcpts.Add(v);
}
builder.Insert(poly);
}
foreach (EdgeSpan span in cut.CutSpans)
{
PolyLine2d pline = new PolyLine2d();
foreach (int vid in span.Vertices)
{
pline.AppendVertex(mesh.GetVertex(vid).xz);
}
pline.Simplify(simplify_thresh, 0.01, true);
foreach (Vector2d v in pline)
{
srcpts.Add(v);
}
builder.Insert(pline);
}
SVGWriter svg = new SVGWriter();
svg.AddGraph(builder.Graph);
var vtx_style = SVGWriter.Style.Outline("red", 1.0f);
foreach (int vid in builder.Graph.VertexIndices())
{
Vector2d v = builder.Graph.GetVertex(vid);
if (srcpts.Contains(v) == false)
{
svg.AddCircle(new Circle2d(v, 2), vtx_style);
}
}
svg.Write(TestUtil.GetTestOutputPath("arrangement.svg"));
}
