/// <summary>
///
/// </summary>
/// <param name="raycaster"></param>
/// <param name="intersects"></param>
public virtual void Raycast(Raycaster raycaster, ref List <Intersect> intersects)
{
var inverseMatrix = new Matrix4();
var ray = new Ray();
var sphere = new Sphere();
var precision = raycaster.LinePrecision;
var precisionSq = precision * precision;
var geometry = this.Geometry as Geometry;
Debug.Assert(null != geometry, "this.Geometry as Geometry cast failed");
if (geometry.BoundingSphere == null)
{
geometry.ComputeBoundingSphere();
}
// Checking boundingSphere distance to ray
sphere.Copy(geometry.BoundingSphere);
sphere.ApplyMatrix4(this.MatrixWorld);
if (raycaster.Ray.IsIntersectionSphere(sphere) == false)
{
return;
}
inverseMatrix = this.MatrixWorld.GetInverse();
ray.Copy(raycaster.Ray).ApplyMatrix4(inverseMatrix);
/* if ( geometry instanceof THREE.BufferGeometry ) {
*
* } else */
if (geometry is Geometry)
{
var vertices = geometry.Vertices;
var nbVertices = vertices.Count;
var interSegment = new Vector3();
var interRay = new Vector3();
var step = (this is Line && ((Line)this).Mode == Three.LineStrip ? 1 : 2);
for (var i = 0; i < nbVertices - 1; i = i + step)
{
var distSq = ray.DistanceSqToSegment(vertices[i], vertices[i + 1], interRay, interSegment);
if (distSq > precisionSq)
{
continue;
}
var distance = ray.Origin.DistanceTo(interRay);
if (distance < raycaster.Near || distance > raycaster.Far)
{
continue;
}
intersects.Add(new Intersect()
{
Distance = distance,
// What do we want? intersection point on the ray or on the segment??
// point: raycaster.ray.at( distance ),
Point = ((Vector3)interSegment.Clone()).ApplyMatrix4(this.MatrixWorld),
Face = null,
FaceIndex = -1,
Object3D = this
});
}
}
}
