/// <summary>
/// </summary>
public bool Intersects(Box3d box, Func <V2d[], IMask2d> create)
{
try
{
var cs3 = box.ComputeCorners().Map(c => m_model2mask.Forward.TransformPosProj(c));
if (cs3.All(c => c.Z < 0.0))
{
return(false);
}
if (cs3.Any(c => c.Z < 0.0))
{
return(true);
}
var cs = cs3.Map(c => c.XY);
var outline = create(new[] { cs[0], cs[2], cs[3], cs[1] })
.Or(create(new[] { cs[0], cs[4], cs[5], cs[1] }))
.Or(create(new[] { cs[1], cs[5], cs[7], cs[3] }))
.Or(create(new[] { cs[3], cs[7], cs[6], cs[2] }))
.Or(create(new[] { cs[2], cs[6], cs[4], cs[0] }))
.Or(create(new[] { cs[4], cs[6], cs[7], cs[5] }))
;
var r = outline.And(m_mask);
return(!r.IsEmpty);
}
catch
{
return(false);
}
}
/// <summary>
/// Returns points inside view frustum (defined by viewProjection and canonicalViewVolume).
/// </summary>
public static IEnumerable <Chunk> QueryPointsInViewFrustum(
this PointSet self, M44d viewProjection, Box3d canonicalViewVolume
)
{
var t = viewProjection.Inverse;
var cs = canonicalViewVolume.ComputeCorners().Map(t.TransformPosProj);
var hull = new Hull3d(new[]
{
new Plane3d(cs[0], cs[2], cs[1]), // near
new Plane3d(cs[5], cs[7], cs[4]), // far
new Plane3d(cs[0], cs[1], cs[4]), // bottom
new Plane3d(cs[1], cs[3], cs[5]), // left
new Plane3d(cs[4], cs[6], cs[0]), // right
new Plane3d(cs[3], cs[2], cs[7]), // top
});
return(QueryPointsInsideConvexHull(self, hull));
}
/// <summary></summary>
public bool IsFullyInside(Box3d box)
{
return(box.ComputeCorners().TrueForAll(Contains));
}