/// <summary>
/// Gets a list of all the InstanceDefinitions that contain a reference this InstanceDefinition.
/// </summary>
/// <returns>An array of instance definitions. The returned array can be empty, but not null.</returns>
public InstanceDefinition[] GetContainers()
{
using (Runtime.InteropWrappers.SimpleArrayInt arr = new Rhino.Runtime.InteropWrappers.SimpleArrayInt())
{
IntPtr ptr = arr.m_ptr;
int count = UnsafeNativeMethods.CRhinoInstanceDefinition_GetContainers(m_doc.m_docId, m_index, ptr);
InstanceDefinition[] rc = null;
if (count > 0)
{
int[] indices = arr.ToArray();
if (indices != null)
{
count = indices.Length;
rc = new InstanceDefinition[count];
for (int i = 0; i < count; i++)
{
rc[i] = new InstanceDefinition(indices[i], m_doc);
}
}
}
else
{
rc = new InstanceDefinition[0];
}
return(rc);
}
}
/// <summary>
/// Gets immediate children of this layer. Note that child layers may have their own children.
/// </summary>
/// <returns>Array of child layers. null if this layer does not have any children.</returns>
public Layer[] GetChildren()
{
Runtime.InteropWrappers.SimpleArrayInt childIndices = new Rhino.Runtime.InteropWrappers.SimpleArrayInt();
int index = LayerIndex;
int count = UnsafeNativeMethods.CRhinoLayerNode_GetChildren(m_doc.m_docId, index, childIndices.m_ptr);
Layer[] rc = null;
if (count > 0)
{
int[] indices = childIndices.ToArray();
count = indices.Length;
rc = new Layer[count];
for (int i = 0; i < count; i++)
{
rc[i] = new Layer(indices[i], m_doc);
}
}
childIndices.Dispose();
return(rc);
}
/// <summary>Finds the first intersection of a ray with a mesh.</summary>
/// <param name="mesh">A mesh to intersect.</param>
/// <param name="ray">A ray to be casted.</param>
/// <param name="meshFaceIndices">faces on mesh that ray intersects.</param>
/// <returns>
/// >= 0.0 parameter along ray if successful.
/// < 0.0 if no intersection found.
/// </returns>
/// <remarks>
/// The ray may intersect more than one face in cases where the ray hits
/// the edge between two faces or the vertex corner shared by multiple faces.
/// </remarks>
public static double MeshRay(Mesh mesh, Ray3d ray, out int[] meshFaceIndices)
{
meshFaceIndices = null;
using (Runtime.InteropWrappers.SimpleArrayInt indices = new Rhino.Runtime.InteropWrappers.SimpleArrayInt())
{
IntPtr pConstMesh = mesh.ConstPointer();
double rc = UnsafeNativeMethods.ON_Intersect_MeshRay1(pConstMesh, ref ray, indices.m_ptr );
int[] vals = indices.ToArray();
if (vals!=null && vals.Length > 0)
meshFaceIndices = vals;
return rc;
}
}