private static GeometryModel3D GetModel_WoodIron_Ring_Band(double ballRadius, double z, System.Windows.Media.Media3D.Material material, TriangleIndexed[] ball, SortedList <string, double> from, SortedList <string, double> to, string prefix)
{
const double ENLARGE = 1.04d;
GeometryModel3D retVal = new GeometryModel3D();
retVal.Material = material;
retVal.BackMaterial = material;
double bandHeight = WeaponDNA.GetKeyValue(prefix + "Height", from, to, StaticRandom.NextPercent(ballRadius * .15, .5));
double bandHeightHalf = bandHeight / 2d;
// Slice the hull at the top and bottom band z's
Point3D[] slice1 = Math3D.GetIntersection_Hull_Plane(ball, new Triangle(new Point3D(0, 0, z - bandHeightHalf), new Point3D(1, 0, z - bandHeightHalf), new Point3D(0, 1, z - bandHeightHalf)));
Point3D[] slice2 = Math3D.GetIntersection_Hull_Plane(ball, new Triangle(new Point3D(0, 0, z + bandHeightHalf), new Point3D(1, 0, z + bandHeightHalf), new Point3D(0, 1, z + bandHeightHalf)));
// Enlarge those polygons xy, leave z alone
slice1 = slice1.Select(o => new Point3D(o.X * ENLARGE, o.Y * ENLARGE, o.Z)).ToArray();
slice2 = slice2.Select(o => new Point3D(o.X * ENLARGE, o.Y * ENLARGE, o.Z)).ToArray();
// Now turn those two polygons into a 3d hull
TriangleIndexed[] band = Math3D.GetConvexHull(UtilityCore.Iterate(slice1, slice2).ToArray());
retVal.Geometry = UtilityWPF.GetMeshFromTriangles(band);
return(retVal);
}
