public void Add(FeatureInfo other)
{
BoundingBox.Contain(other.BoundingBox);
Extrusion += other.Extrusion;
Duration += other.Duration;
Distance += other.Distance;
UnweightedCenterOfMass += other.UnweightedCenterOfMass;
}
public AxisAlignedBox2d Bounds()
{
AxisAlignedBox2d box = AxisAlignedBox2d.Empty;
foreach (Element e in vElements)
{
box.Contain(e.Bounds());
}
return(box);
}
public AxisAlignedBox2d GetBounds()
{
if (vertices.Count == 0)
{
return(AxisAlignedBox2d.Empty);
}
AxisAlignedBox2d box = new AxisAlignedBox2d(vertices[0]);
for (int i = 1; i < vertices.Count; ++i)
{
box.Contain(vertices[i]);
}
return(box);
}
public static void CalculateUVs(this DMesh3 dMesh)
{
dMesh.EnableVertexUVs(Vector2f.Zero);
OrthogonalPlaneFit3 orth = new OrthogonalPlaneFit3(dMesh.Vertices());
Frame3f frame = new Frame3f(orth.Origin, orth.Normal);
AxisAlignedBox3d bounds = dMesh.CachedBounds;
AxisAlignedBox2d boundsInFrame = new AxisAlignedBox2d();
for (int i = 0; i < 8; i++)
{
boundsInFrame.Contain(frame.ToPlaneUV((Vector3f)bounds.Corner(i), 3));
}
Vector2f min = (Vector2f)boundsInFrame.Min;
float width = (float)boundsInFrame.Width;
float height = (float)boundsInFrame.Height;
for (int i = 0; i < dMesh.VertexCount; i++)
{
Vector2f UV = frame.ToPlaneUV((Vector3f)dMesh.GetVertex(i), 3);
UV.x = (UV.x - min.x) / width;
UV.y = (UV.y - min.y) / height;
dMesh.SetVertexUV(i, UV);
}
}
/// <summary>
/// This function is supposed to take a set of spans in a plane and sort them
/// into regions that can be filled with a polygon. Currently kind of clusters
/// based on intersecting bboxes. Does not work.
///
/// I think fundamentally it needs to look back at the input mesh, to see what
/// is connected/not-connected. Or possibly use polygon winding number? Need
/// to somehow define what the holes are...
/// </summary>
List <List <EdgeSpan> > sort_planar_spans(List <EdgeSpan> allspans, Vector3d normal)
{
var result = new List <List <EdgeSpan> >();
var polyFrame = new Frame3f(Vector3d.Zero, normal);
int N = allspans.Count;
var plines = new List <PolyLine2d>();
foreach (EdgeSpan span in allspans)
{
plines.Add(to_polyline(span, polyFrame));
}
bool[] bad_poly = new bool[N];
for (int k = 0; k < N; ++k)
{
bad_poly[k] = false; // self_intersects(plines[k]);
}
bool[] used = new bool[N];
for (int k = 0; k < N; ++k)
{
if (used[k])
{
continue;
}
bool is_bad = bad_poly[k];
AxisAlignedBox2d bounds = plines[k].Bounds;
used[k] = true;
var set = new List <int>()
{
k
};
for (int j = k + 1; j < N; ++j)
{
if (used[j])
{
continue;
}
AxisAlignedBox2d boundsj = plines[j].Bounds;
if (bounds.Intersects(boundsj))
{
used[j] = true;
is_bad = is_bad || bad_poly[j];
bounds.Contain(boundsj);
set.Add(j);
}
}
if (is_bad == false)
{
var span_set = new List <EdgeSpan>();
foreach (int idx in set)
{
span_set.Add(allspans[idx]);
}
result.Add(span_set);
}
}
return(result);
}
// 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"));
}