/// <summary>
/// This is the method that actually does the work.
/// </summary>
protected override void SolveInstance(IGH_DataAccess DA)
{
var pts = new List <Rhino.Geometry.Point3d>();
var obstructions = new List <Rhino.Geometry.Mesh>();
var rays = new List <Rhino.Geometry.Vector3d>();
var hitCount = new List <int>();
if (!DA.GetDataList(0, pts))
{
return;
}
if (!DA.GetDataList(1, obstructions))
{
return;
}
if (!DA.GetDataList(2, rays))
{
return;
}
var scene = EmbreeTools.BuildScene(obstructions);
if (rays.Count < 25) // Needs more benchmarking to pick right value
{
hitCount = EmbreeTools.OcclusionHits(scene, pts, rays, true);
}
else
{
hitCount = EmbreeTools.OcclusionHits4(scene, pts, rays, true);
}
DA.SetDataList(0, hitCount);
}
/// <summary>
/// This is the method that actually does the work.
/// </summary>
/// <param name="DA">The DA object is used to retrieve from inputs and store in outputs.</param>
protected override void SolveInstance(IGH_DataAccess DA)
{
var pts = new List <Rhino.Geometry.Point3d>();
var obstructions = new List <Rhino.Geometry.Mesh>();
var directions = new List <Rhino.Geometry.Vector3d>();
if (!DA.GetDataList(0, obstructions))
{
return;
}
if (!DA.GetDataList(1, pts))
{
return;
}
if (!DA.GetDataList(2, directions))
{
return;
}
var hitList = new List <bool>();
var scene = EmbreeTools.BuildScene(obstructions);
var intersectionPoints = EmbreeTools.Intersections(scene, pts, directions, ref hitList);
DA.SetDataList(0, intersectionPoints);
DA.SetDataList(1, hitList);
}
public static bool TestIntersect(Mesh meshA, Mesh meshB, ref Point3d pt, bool fast = true)
{
bool meshInterects = false;
bool bboxIntersection = TestBBIntersect(meshA, meshB);
if (!bboxIntersection)
{
return(false); // if bounding boxes don't intersect then meshes don't interesect
}
Mesh largeMesh;
Mesh smallMesh;
if (meshA.Faces.Count > meshB.Faces.Count)
{
largeMesh = meshA;
smallMesh = meshB;
}
else
{
largeMesh = meshB;
smallMesh = meshA;
}
var scene = EmbreeTools.BuildScene(largeMesh);
var meshVertices = smallMesh.Vertices.ToPoint3fArray();
foreach (var face in smallMesh.Faces)
{
int numVertices = face.IsTriangle ? 3 : 4;
for (int v = 0; v < numVertices; v++)
{
var ray = RayFromVertices(meshVertices[face[v]], meshVertices[face[(v + 1) % numVertices]]);
var packet = scene.Intersects(ray.Item1, 0, ray.Item2);
bool hit = (packet.geomID != RTC.InvalidGeometryID);
if (hit)
{
meshInterects = true;
var intersect = packet.ToIntersection <Model>(scene);
var hitPos = ray.Item1.PointAt(intersect.Distance);
pt = new Rhino.Geometry.Point3d(hitPos.X, hitPos.Y, hitPos.Z);
break;
}
}
if (meshInterects)
{
break;
}
}
return(meshInterects);
}