public override void UpdateCurvesGeometry()
{
base.UpdateCurvesGeometry();
// get projected versions of top/bottom circles
var top = Center.Value + 0.5 * Length.Value * Axis.Value;
var topCircle3d = ShapeHelper.GenerateCircle(top, Axis, TopRadiusInternal, 20);
var topCircle = ShapeHelper.ProjectCurve(topCircle3d);
var bottom = Center.Value - 0.5 * Length.Value * Axis.Value;
var bottomCircle3d = ShapeHelper.GenerateCircle(bottom, Axis, BottomRadiusInternal, 20);
var bottomCircle = ShapeHelper.ProjectCurve(bottomCircle3d);
// find the axis in projected coordinates
var tb = ShapeHelper.ProjectCurve(top, bottom);
var axis2d = tb[0] - tb[1];
// find the 2 silhouette lines
var perp = new Vector(axis2d.Y, -axis2d.X);
perp.Normalize();
var lt = tb[0] + TopRadiusInternal * perp;
var lb = tb[1] + BottomRadiusInternal * perp;
var rt = tb[0] - TopRadiusInternal * perp;
var rb = tb[1] - BottomRadiusInternal * perp;
var leftLine = new Point[] { lt, lb };
var rightLine = new Point[] { rt, rb };
}
public override void UpdateCurvesGeometry()
{
var circle3d = ShapeHelper.GenerateCircle(Center, new Vector3D(1, 0, 0), new Vector3D(0, 1, 0), Radius, 20);
var circle = ShapeHelper.ProjectCurve(circle3d);
SilhouetteCircle.Points = circle.Append(circle.First()).ToArray();
}
private Geometry GetGeometry(CircleFeatureCurve circle)
{
var circlePoints = ShapeHelper.GenerateCircle(circle.CenterResult,
circle.NormalResult,
circle.RadiusResult,
20);
return(GetProjectedGeometry(circlePoints));
}
public void Update()
{
var normal = featureCurve.NormalResult;
var center = featureCurve.CenterResult;
var radius = featureCurve.RadiusResult;
var points = ShapeHelper.GenerateCircle(center, normal, radius, CIRCLE_SAMPLES_COUNT).ToList();
points.Add(points.First());
model3d.Geometry = GenerateMeshGeometry(points, normal);
}
private MeshGeometry3D GenerateMeshGeometry(IList <Point3D> points, Vector3D xAxis)
{
// normalize the x axis in order to satisfy the requirements of ShapeHelper.GenerateCircle
xAxis.Normalize();
// generate all circles
var circles = new List <IList <Point3D> >();
var normals = GenerateNormals(points);
for (int i = 0; i < points.Count; ++i)
{
var pnt = points[i];
var nrm = normals[i];
var yAxis = Vector3D.CrossProduct(xAxis, nrm).Normalized();
var circle = ShapeHelper.GenerateCircle(pnt, xAxis, yAxis, thickness, CROSS_SECTION_SAMPLES_COUNT);
circles.Add(circle);
}
// generate the mesh geometry
var geometry = new MeshGeometry3D();
geometry.Positions = new Point3DCollection(circles.SelectMany(c => c)); // put in all points
for (int i = 0; i < circles.Count; ++i)
{
var currBaseIndex = i * CROSS_SECTION_SAMPLES_COUNT;
var nextBaseIndex = currBaseIndex + CROSS_SECTION_SAMPLES_COUNT;
for (int j = 0; j < CROSS_SECTION_SAMPLES_COUNT; ++j)
{
var c1 = currBaseIndex + j;
var c2 = currBaseIndex + (j + 1) % CROSS_SECTION_SAMPLES_COUNT;
var n1 = nextBaseIndex + j;
var n2 = nextBaseIndex + (j + 1) % CROSS_SECTION_SAMPLES_COUNT;
geometry.TriangleIndices.Add(c1);
geometry.TriangleIndices.Add(c2);
geometry.TriangleIndices.Add(n1);
geometry.TriangleIndices.Add(n1);
geometry.TriangleIndices.Add(c2);
geometry.TriangleIndices.Add(n2);
}
}
return(geometry);
}
public static Visual3D CreateConeView(SnappedCone coneData)
{
Contract.Requires(coneData != null);
Contract.Ensures(Contract.Result <Visual3D>() != null);
var topCircle = ShapeHelper.GenerateCircle(
coneData.TopFeatureCurve.CenterResult,
coneData.TopFeatureCurve.NormalResult,
coneData.TopFeatureCurve.RadiusResult,
50);
var botCircle = ShapeHelper.GenerateCircle(
coneData.BottomFeatureCurve.CenterResult,
coneData.BottomFeatureCurve.NormalResult,
coneData.BottomFeatureCurve.RadiusResult,
50);
return(CreateCylinderView(topCircle, botCircle, coneData));
}