protected void GetPlanarPolys(PlanarRegion r, List <Polygon2d> polys)
{
try {
MeshRegionBoundaryLoops loops = new MeshRegionBoundaryLoops(r.Mesh, r.Triangles);
foreach (var loop in loops)
{
DCurve3 curve = loop.ToCurve();
Polygon2d poly = new Polygon2d();
int NV = curve.VertexCount;
for (int k = 0; k < NV; k++)
{
poly.AppendVertex(curve[k].xy);
}
polys.Add(poly);
}
} catch (Exception) {
// add each triangle as a polygon and let clipper sort it out
Vector3d v0 = Vector3d.Zero, v1 = Vector3d.Zero, v2 = Vector3d.Zero;
foreach (int tid in r.Triangles)
{
r.Mesh.GetTriVertices(tid, ref v0, ref v1, ref v2);
Polygon2d p = new Polygon2d();
p.AppendVertex(v0.xy); p.AppendVertex(v1.xy); p.AppendVertex(v2.xy);
polys.Add(p);
}
}
}
static void Main()
{
Polygon2d poly = new Polygon2d();
poly.AppendVertex(new Vector2d(0, 0));
poly.AppendVertex(new Vector2d(100, 0));
poly.AppendVertex(new Vector2d(100, 100));
poly.AppendVertex(new Vector2d(0, 1000));
}
public static void test_tiling()
{
Vector2d origin = Vector2d.Zero;
double radius = 22;
Circle2d circ = new Circle2d(origin, radius);
AxisAlignedBox2d elemBounds = circ.Bounds;
//elemBounds.Max.x += radius / 2;
AxisAlignedBox2d packBounds = new AxisAlignedBox2d(0, 0, 800, 400);
double spacing = 5;
Polygon2d boundsPoly = new Polygon2d();
for (int i = 0; i < 4; ++i)
{
boundsPoly.AppendVertex(packBounds.GetCorner(i));
}
//List<Vector2d> packed = TilingUtil.BoundedRegularTiling2(elemBounds, packBounds, spacing);
List <Vector2d> packed = TilingUtil.BoundedCircleTiling2(elemBounds, packBounds, spacing);
System.Console.WriteLine("packed {0}", packed.Count);
SVGWriter writer = new SVGWriter();
foreach (Vector2d t in packed)
{
writer.AddCircle(new Circle2d(origin + t, radius), SVGWriter.Style.Outline("black", 1.0f));
}
writer.AddPolygon(boundsPoly, SVGWriter.Style.Outline("red", 2.0f));
writer.Write(TestUtil.GetTestOutputPath("test.svg"));
}
public static void TestOffsetAnimation()
{
Window window = new Window("TestFill");
window.SetDefaultSize(600, 600);
window.SetPosition(WindowPosition.Center);
DMesh3 mesh = StandardMeshReader.ReadMesh("c:\\scratch\\remesh.obj");
MeshBoundaryLoops loops = new MeshBoundaryLoops(mesh);
DCurve3 curve = loops[0].ToCurve();
Polygon2d poly = new Polygon2d();
foreach (Vector3d v in curve.Vertices)
{
poly.AppendVertex(v.xy);
}
Outer = new GeneralPolygon2d(poly);
DebugViewCanvas view = new DebugViewCanvas();
view.AddPolygon(Outer, Colorf.Black);
DGraph2 graph = TopoOffset2d.QuickCompute(Outer, AnimOffset, AnimSpacing);
view.AddGraph(graph, Colorf.Red);
window.Add(view);
window.ShowAll();
Active = view;
}
public Polygon2d GetPolygon(bool update = true)
{
if (update)
{
Update();
}
Polygon2d poly = new Polygon2d();
for (int i = 0; i < ellipse.Length; i++)
{
Vector2 p = ellipse[i];
if (animationEnabled)
{
foreach (Attractor v in attractors)
{
p = v.Apply(p);
}
p = ellipse[i] + (p - ellipse[i]) * distrStrength;
float aC = Mathf.Max(0f, ceilRange - Vector2.Angle(Vector2.up, p)) / ceilRange;
p.y += (Random.value - 0.5f) * aC * cNoise * noiseScale;
float aF = Mathf.Max(0f, floorRange - Vector2.Angle(Vector2.down, p)) / floorRange;
p.y += (Random.value - 0.5f) * aF * fNoise * noiseScale;
}
poly.AppendVertex(p);
}
//Draw(poly);
return(poly);
}
public List <GeneralPolygon2d> GetSolids()
{
Frame3f f = frameL;
if (OutputSpace != CoordSpace.ObjectCoords)
{
f = SceneTransforms.TransformTo(f, SO, CoordSpace.ObjectCoords, OutputSpace);
}
PlanarComplex complex = new PlanarComplex();
foreach (DCurve3 c in localCurves.Loops)
{
Polygon2d poly = new Polygon2d();
for (int i = 0; i < c.VertexCount; ++i)
{
Vector2f uv = f.ToPlaneUV((Vector3f)c[i], 2);
poly.AppendVertex(uv);
}
complex.Add(poly);
}
PlanarComplex.FindSolidsOptions options = PlanarComplex.FindSolidsOptions.SortPolygons;
var info = complex.FindSolidRegions(options);
return(info.Polygons);
}
/// <summary>
/// Construct the set of polygons-with-holes that represents the input string
/// </summary>
static List <GeneralPolygon2d> GetPolygons(string s, string fontName = "Consolas", FontStyle style = FontStyle.Regular, int emSize = 128)
{
GraphicsPath path = new GraphicsPath();
string text = s;
FontFamily font = new FontFamily(fontName);
Point origin = new Point(0, 0);
StringFormat format = new StringFormat();
path.AddString(text, font, (int)style, emSize, origin, format);
path.Flatten();
PlanarComplex complex = new PlanarComplex();
Polygon2d cur_poly = new Polygon2d();
for (int i = 0; i < path.PathPoints.Length; ++i)
{
PointF pt = path.PathPoints[i];
Vector2d v = new Vector2d(pt.X, pt.Y);
int type = path.PathTypes[i] & 0x7;
int flags = path.PathTypes[i] & 0xF8;
if (type == 0)
{
cur_poly = new Polygon2d();
cur_poly.AppendVertex(v);
}
else if (type == 1)
{
cur_poly.AppendVertex(v);
if ((flags & 0x80) != 0)
{
// [RMS] some characters have a duplicate start/end point after Flatten(). Some do not. Clusterfuck!
int iLast = cur_poly.VertexCount - 1;
if (cur_poly[0].Distance(cur_poly[iLast]) < 0.001)
{
cur_poly.RemoveVertex(iLast); // we just duplicated first point
}
complex.Add(cur_poly);
}
}
}
PlanarComplex.SolidRegionInfo solids = complex.FindSolidRegions(0.0f, false);
List <GeneralPolygon2d> result = solids.Polygons;
foreach (var gp in result)
{
gp.Transform((v) => { return(new Vector2d(v.x, emSize - v.y)); });
}
return(result);
}
public static void compute_distance_image()
{
DMesh3 mesh = StandardMeshReader.ReadMesh("c:\\scratch\\remesh.obj");
MeshBoundaryLoops loops = new MeshBoundaryLoops(mesh);
DCurve3 curve = loops[0].ToCurve();
Polygon2d poly = new Polygon2d();
foreach (Vector3d v in curve.Vertices)
{
poly.AppendVertex(v.xy);
}
int N = 1024;
double cellsize = poly.Bounds.MaxDim / (double)N;
Vector2d o = poly.Bounds.Min;
o -= 4 * cellsize * Vector2d.One;
N += 8;
ShiftGridIndexer2 indexer = new ShiftGridIndexer2(poly.Bounds.Min, cellsize);
double[] df = new double[N * N];
double maxd = 0;
for (int yi = 0; yi < N; ++yi)
{
for (int xi = 0; xi < N; ++xi)
{
Vector2d p = indexer.FromGrid(new Vector2i(xi, yi));
double d = Math.Sqrt(poly.DistanceSquared(p));
df[yi * N + xi] = d;
maxd = Math.Max(d, maxd);
}
}
SKBitmap bmp = new SKBitmap(N, N);
for (int yi = 0; yi < N; ++yi)
{
for (int xi = 0; xi < N; ++xi)
{
double d = df[yi * N + xi];
float f = (float)(d / maxd);
byte b = (byte)(int)(f * 255);
bmp.SetPixel(xi, yi, new SKColor(b, b, b));
}
}
using (var image = SKImage.FromBitmap(bmp))
using (var data = image.Encode(SKEncodedImageFormat.Png, 80)) {
// save the data to a stream
using (var stream = File.OpenWrite("c:\\scratch\\distances.png")) {
data.SaveTo(stream);
}
}
}
Polygon2d make_poly(DMesh3 mesh, EdgeLoop loop)
{
Polygon2d poly = new Polygon2d();
for (int k = 0; k < loop.VertexCount; ++k)
{
Vector3d v = mesh.GetVertex(loop.Vertices[k]);
poly.AppendVertex(v.xy);
}
return(poly);
}
Polygon2d to_polygon(EdgeSpan span, Frame3f polyFrame)
{
int NV = span.VertexCount;
Polygon2d poly = new Polygon2d();
for (int k = 0; k < NV; ++k)
{
poly.AppendVertex(polyFrame.ToPlaneUV((Vector3f)span.GetVertex(k), 2));
}
return(poly);
}
public static void Restore(Polygon2d polygon, BinaryReader reader)
{
int count = reader.ReadInt32();
for (int i = 0; i < count; ++i)
{
double x = reader.ReadDouble();
double y = reader.ReadDouble();
polygon.AppendVertex(new Vector2D(x, y));
}
}
public Cvt(IReadOnlyCollection <Vertex> polygon, CvtSettings settings)
{
if (settings == null)
{
throw new ArgumentException("Please, define CvtSettings object");
}
Polygon = new Polygon2d();
foreach (Vertex vertex in polygon)
{
Polygon.AppendVertex(new Vector2d(vertex.X, vertex.Y));
}
Settings = settings;
}
public static Polygon2d ConvertFromClipper(CPolygon clipper_poly, double nIntScale)
{
double scale = 1.0 / (double)nIntScale;
int N = clipper_poly.Count;
Polygon2d poly = new Polygon2d();
for (int i = 0; i < N; ++i)
{
IntPoint p = clipper_poly[i];
Vector2d v = new Vector2d((double)p.X * scale, (double)p.Y * scale);
poly.AppendVertex(v);
}
return(poly);
}
/// <summary>
/// create Polygon by projecting polygon3 into frame
/// </summary>
public MeshInsertProjectedPolygon(DMesh3 mesh, DCurve3 polygon3, Frame3f frame, int seedTri)
{
if (polygon3.Closed == false)
{
throw new Exception("MeshInsertPolyCurve(): only closed polygon3 supported for now");
}
Mesh = mesh;
ProjectFrame = frame;
SeedTriangle = seedTri;
Polygon = new Polygon2d();
foreach (Vector3d v3 in polygon3.Vertices)
{
Vector2f uv = frame.ToPlaneUV((Vector3f)v3, 2);
Polygon.AppendVertex(uv);
}
}
static GeneralPolygon2d GetPolygonFromMesh(string sPath)
{
DMesh3 mesh = StandardMeshReader.ReadMesh(sPath);
MeshBoundaryLoops loops = new MeshBoundaryLoops(mesh);
PlanarComplex complex = new PlanarComplex();
foreach (var loop in loops)
{
Polygon2d poly = new Polygon2d();
DCurve3 curve = MeshUtil.ExtractLoopV(mesh, loop.Vertices);
foreach (Vector3d v in curve.Vertices)
{
poly.AppendVertex(v.xy);
}
complex.Add(poly);
}
PlanarComplex.SolidRegionInfo solids = complex.FindSolidRegions(0.0, false);
return(solids.Polygons[0]);
}
public List <Polygon2d> GetPolygons()
{
Frame3f f = frameL;
if (OutputSpace != CoordSpace.ObjectCoords)
{
f = SceneTransforms.TransformTo(f, SO, CoordSpace.ObjectCoords, OutputSpace);
}
List <Polygon2d> polygons = new List <Polygon2d>();
foreach (DCurve3 c in localCurves.Loops)
{
Polygon2d poly = new Polygon2d();
for (int i = 0; i < c.VertexCount; ++i)
{
Vector2f uv = f.ToPlaneUV((Vector3f)c[i], 2);
poly.AppendVertex(uv);
}
polygons.Add(poly);
}
return(polygons);
}
public static void test_uv_insert_segment()
{
DMesh3 mesh = TestUtil.LoadTestInputMesh("plane_250v.obj");
mesh.EnableVertexUVs(Vector2f.Zero);
MeshTransforms.ConvertYUpToZUp(mesh);
DMeshAABBTree3 spatial = new DMeshAABBTree3(mesh);
spatial.Build();
int tid = spatial.FindNearestTriangle(Vector3d.Zero);
//Polygon2d poly = Polygon2d.MakeRectangle(Vector2d.Zero, 5, 5);
Polygon2d poly = Polygon2d.MakeCircle(5, 13);
//PolyLine2d poly = new PolyLine2d( new Vector2d[] { -5 * Vector2d.One, 5 * Vector2d.One });
//int tri_edge0 = mesh.GetTriEdge(tid, 0);
//Index2i edge0_tris = mesh.GetEdgeT(tri_edge0);
//Index2i edge0_verts = mesh.GetEdgeV(tri_edge0);
//Vector3d v0 = mesh.GetVertex(edge0_verts.a), v1 = mesh.GetVertex(edge0_verts.b);
//Vector3d c = mesh.GetTriCentroid(tid);
//Polygon2d poly = new Polygon2d(new Vector2d[] {
// Vector2d.Lerp(v0.xy, v1.xy, -0.25),
// Vector2d.Lerp(v0.xy, v1.xy, 1.5),
// c.xy
//});
MeshInsertUVPolyCurve insert = new MeshInsertUVPolyCurve(mesh, poly);
insert.Apply();
Polygon2d test_poly = new Polygon2d();
List <double> distances = new List <double>();
List <int> nearests = new List <int>();
for (int i = 0; i < insert.Loops[0].VertexCount; ++i)
{
Vector2d v = mesh.GetVertex(insert.Loops[0].Vertices[i]).xy;
test_poly.AppendVertex(v);
int iNear; double fNear;
distances.Add(poly.DistanceSquared(v, out iNear, out fNear));
nearests.Add(iNear);
}
System.Console.WriteLine("inserted loop poly has {0} edges", insert.Loops[0].EdgeCount);
// find a triangle connected to loop that is inside the polygon
// [TODO] maybe we could be a bit more robust about this? at least
// check if triangle is too degenerate...
int seed_tri = -1;
for (int i = 0; i < insert.Loops[0].EdgeCount; ++i)
{
Index2i et = mesh.GetEdgeT(insert.Loops[0].Edges[i]);
Vector3d ca = mesh.GetTriCentroid(et.a);
bool in_a = poly.Contains(ca.xy);
Vector3d cb = mesh.GetTriCentroid(et.b);
bool in_b = poly.Contains(cb.xy);
if (in_a && in_b == false)
{
seed_tri = et.a;
break;
}
else if (in_b && in_a == false)
{
seed_tri = et.b;
break;
}
}
Util.gDevAssert(seed_tri != -1);
// flood-fill inside loop
HashSet <int> loopEdges = new HashSet <int>(insert.Loops[0].Edges);
MeshFaceSelection sel = new MeshFaceSelection(mesh);
sel.FloodFill(seed_tri, null, (eid) => { return(loopEdges.Contains(eid) == false); });
// delete inside loop
MeshEditor editor = new MeshEditor(mesh);
editor.RemoveTriangles(sel, true);
MeshTransforms.ConvertZUpToYUp(mesh);
TestUtil.WriteTestOutputMesh(mesh, "insert_uv_segment.obj");
//OBJWriter writer = new OBJWriter();
//var s = new System.IO.StreamWriter(Program.TEST_OUTPUT_PATH + "mesh_local_param.obj", false);
//List<WriteMesh> wm = new List<WriteMesh>() { new WriteMesh(mesh) };
//WriteOptions opt = new WriteOptions() {
// bCombineMeshes = false, bWriteGroups = false, bPerVertexColors = true, bPerVertexUVs = true,
// AsciiHeaderFunc = () => { return "mttllib checkerboard.mtl\r\nusemtl checkerboard\r\n"; }
//};
//writer.Write(s, wm, opt);
//s.Close();
}
public static void test_tube_generator()
{
Polygon2d circle_path = Polygon2d.MakeCircle(50, 64);
PolyLine2d arc_path = new PolyLine2d(circle_path.Vertices.Take(circle_path.VertexCount / 2));
Polygon2d irreg_path = new Polygon2d();
for (int k = 0; k < circle_path.VertexCount; ++k)
{
irreg_path.AppendVertex(circle_path[k]);
k += k / 2;
}
PolyLine2d irreg_arc_path = new PolyLine2d(irreg_path.Vertices.Take(circle_path.VertexCount - 1));
Polygon2d square_profile = Polygon2d.MakeCircle(7, 32);
square_profile.Translate(4 * Vector2d.One);
//square_profile[0] = 20 * square_profile[0].Normalized;
bool no_shared = true;
WriteGeneratedMesh(
new TubeGenerator(circle_path, Frame3f.Identity, square_profile)
{
WantUVs = true, NoSharedVertices = no_shared
},
"tubegen_loop_standarduv.obj");
WriteGeneratedMesh(
new TubeGenerator(irreg_path, Frame3f.Identity, square_profile)
{
WantUVs = true, NoSharedVertices = no_shared
},
"tubegen_irregloop_standarduv.obj");
WriteGeneratedMesh(
new TubeGenerator(arc_path, Frame3f.Identity, square_profile)
{
WantUVs = true, NoSharedVertices = no_shared
},
"tubegen_arc_standarduv.obj");
WriteGeneratedMesh(
new TubeGenerator(irreg_arc_path, Frame3f.Identity, square_profile)
{
WantUVs = true, NoSharedVertices = no_shared
},
"tubegen_irregarc_standarduv.obj");
// append tube border around each hole of input mesh
DMesh3 inMesh = TestUtil.LoadTestInputMesh("n_holed_bunny.obj");
Polygon2d bdrycirc = Polygon2d.MakeCircle(0.25, 6);
MeshBoundaryLoops loops = new MeshBoundaryLoops(inMesh);
foreach (EdgeLoop loop in loops)
{
DCurve3 curve = loop.ToCurve().ResampleSharpTurns();
TubeGenerator gen = new TubeGenerator(curve, bdrycirc)
{
NoSharedVertices = false
};
MeshEditor.Append(inMesh, gen.Generate().MakeDMesh());
}
TestUtil.WriteTestOutputMesh(inMesh, "boundary_tubes.obj");
}
// exports svg w/ different containments of point set (created by slicing mesh)
public static void containment_demo_svg()
{
DMesh3 mesh = TestUtil.LoadTestInputMesh("bunny_solid.obj");
MeshTransforms.Scale(mesh, 4);
AxisAlignedBox3d meshBounds = mesh.CachedBounds;
Vector3d origin = meshBounds.Center;
origin -= 0.2 * meshBounds.Height * Vector3d.AxisY;
Frame3f plane = new Frame3f(origin, new Vector3d(1, 3, 0).Normalized);
MeshPlaneCut cut = new MeshPlaneCut(mesh, plane.Origin, plane.Z);
cut.Cut();
AxisAlignedBox2d polyBounds = AxisAlignedBox2d.Empty;
List <Polygon2d> polys = new List <Polygon2d>();
foreach (EdgeLoop loop in cut.CutLoops)
{
Polygon2d poly = new Polygon2d();
foreach (int vid in loop.Vertices)
{
poly.AppendVertex(mesh.GetVertex(vid).xz);
}
poly.Rotate(new Matrix2d(90, true), Vector2d.Zero);
polys.Add(poly);
polyBounds.Contain(poly.Bounds);
}
SVGWriter svg = new SVGWriter();
var polyStyle = SVGWriter.Style.Outline("red", 1.0f);
var contStyle = SVGWriter.Style.Outline("black", 1.0f);
for (int k = 0; k < 3; ++k)
{
double shift = (k == 2) ? 1.4f : 1.1f;
Vector2d tx = (k - 1) * (polyBounds.Width * shift) * Vector2d.AxisX;
List <Vector2d> pts = new List <Vector2d>();
foreach (Polygon2d poly in polys)
{
var p2 = new Polygon2d(poly).Translate(tx);
pts.AddRange(p2.Vertices);
svg.AddPolygon(p2, polyStyle);
}
if (k == 0)
{
ConvexHull2 hull = new ConvexHull2(pts, 0.001, QueryNumberType.QT_DOUBLE);
svg.AddPolygon(hull.GetHullPolygon(), contStyle);
}
else if (k == 1)
{
ContMinBox2 contbox = new ContMinBox2(pts, 0.001, QueryNumberType.QT_DOUBLE, false);
svg.AddPolygon(new Polygon2d(contbox.MinBox.ComputeVertices()), contStyle);
}
else if (k == 2)
{
ContMinCircle2 contcirc = new ContMinCircle2(pts);
svg.AddCircle(contcirc.Result, contStyle);
}
}
svg.Write(TestUtil.GetTestOutputPath("contain_demos.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"));
}
