CRhinoCommand::result CCommandSampleTriangulatePolygon::RunCommand( const CRhinoCommandContext& context )
{
CRhinoGetObject go;
go.SetCommandPrompt( L"Select closed planar polygon to triangulate" );
go.SetGeometryFilter( CRhinoGetObject::curve_object );
go.SetGeometryFilter( CRhinoGetObject::closed_curve );
go.EnableSubObjectSelect( FALSE );
go.GetObjects( 1, 1 );
if( go.CommandResult() != CRhinoCommand::success )
return go.CommandResult();
const CRhinoObjRef& ref = go.Object(0);
ON_3dPointArray vertices;
const ON_PolylineCurve* pc = ON_PolylineCurve::Cast( ref.Curve() );
if( pc )
{
vertices = pc->m_pline;
}
else
{
const ON_NurbsCurve* nc = ON_NurbsCurve::Cast( ref.Curve() );
if( nc )
nc->IsPolyline( &vertices );
}
if( vertices.Count() < 5 )
{
RhinoApp().Print( L"Curve not polygon with at least four sides.\n" );
return CRhinoCommand::nothing;
}
int* triangles = (int*)onmalloc( (vertices.Count()-3) * sizeof(int) * 3 );
if( 0 == triangles )
return CRhinoCommand::failure; // out of memory
memset( triangles, 0, (vertices.Count()-3) * sizeof(int) * 3 );
int rc = RhinoTriangulate3dPolygon( vertices.Count()-1, 3, (const double*)vertices.Array(), 3, triangles);
if( 0 == rc )
{
int i;
for( i = 0; i < vertices.Count()-3; i++ )
{
ON_Polyline pline;
pline.Append( vertices[triangles[i * 3]] );
pline.Append( vertices[triangles[i * 3 + 1]] );
pline.Append( vertices[triangles[i * 3 + 2]] );
pline.Append( pline[0] );
context.m_doc.AddCurveObject( pline );
}
context.m_doc.Redraw();
}
onfree( triangles );
return CRhinoCommand::success;
}
CRhinoCommand::result CCommandSampleLineMeshIntersect::RunCommand( const CRhinoCommandContext& context )
{
CRhinoGetObject gm;
gm.SetCommandPrompt(L"Select mesh to intersect");
gm.SetGeometryFilter(CRhinoGetObject::mesh_object);
gm.GetObjects(1, 1);
if (gm.CommandResult() != CRhinoCommand::success)
return gm.CommandResult();
const ON_Mesh* mesh = gm.Object(0).Mesh();
if (0 == mesh)
return CRhinoCommand::failure;
CRhinoGetObject gl;
gl.SetCommandPrompt(L"Select line to intersect with");
gl.SetGeometryFilter(CRhinoGetObject::curve_object);
gl.SetGeometryAttributeFilter(CRhinoGetObject::open_curve);
gl.EnablePreSelect(FALSE);
gl.EnableDeselectAllBeforePostSelect(FALSE);
gl.GetObjects(1, 1);
if (gl.CommandResult() != CRhinoCommand::success)
return gl.CommandResult();
const ON_Curve* curve = gl.Object(0).Curve();
if (0 == curve)
return CRhinoCommand::failure;
const ON_LineCurve* line_curve = ON_LineCurve::Cast(curve);
if (0 == line_curve)
{
RhinoApp().Print(L"Not a line curve.\n");
return CRhinoCommand::nothing;
}
ON_3dPointArray points;
points.Append(line_curve->m_line.from);
points.Append(line_curve->m_line.to);
const ON_MeshTree* mesh_tree = mesh->MeshTree(true);
if (mesh_tree)
{
ON_SimpleArray<ON_CMX_EVENT> cmx;
if (mesh_tree->IntersectPolyline(2, points.Array(), cmx))
{
for (int i = 0; i < cmx.Count(); i++)
{
RhinoApp().Print(L"Intesection found at face index = %d.\n", cmx[i].m_M[0].m_face_index);
CRhinoPointObject* point_object = context.m_doc.AddPointObject(cmx[i].m_M[0].m_P);
if (point_object)
point_object->Select();
}
context.m_doc.Redraw();
}
if (1 == cmx.Count())
RhinoApp().Print(L"1 intesection found.\n");
else
RhinoApp().Print(L"%d intesections found.\n", cmx.Count());
}
return CRhinoCommand::success;
}
void ON_TextLog::Print( const ON_3dPointArray& a, const char* sPreamble )
{
const double* p = (a.Array() ? &a.Array()[0].x : NULL );
PrintPointList( 3, false, a.Count(), 3, p, sPreamble );
}
