Revision: 56202
http://sourceforge.net/p/brlcad/code/56202
Author: starseeker
Date: 2013-07-24 21:10:26 +0000 (Wed, 24 Jul 2013)
Log Message:
-----------
Start roughing out the mapping between ON_BRep and the AP203 types - this is
just a scratchpad at this point, essentially notes in C++ form rather than
anything close to functional.
Modified Paths:
--------------
brlcad/trunk/src/conv/step/CMakeLists.txt
Added Paths:
-----------
brlcad/trunk/src/conv/step/ON_Brep.cpp
Modified: brlcad/trunk/src/conv/step/CMakeLists.txt
===================================================================
--- brlcad/trunk/src/conv/step/CMakeLists.txt 2013-07-24 19:36:43 UTC (rev
56201)
+++ brlcad/trunk/src/conv/step/CMakeLists.txt 2013-07-24 21:10:26 UTC (rev
56202)
@@ -507,6 +507,8 @@
DISTCLEAN(${SCHEMA_OUT_DIR}/make_schema)
+CMAKEFILES(ON_Brep.cpp)
+
# Local Variables:
# tab-width: 8
# mode: cmake
Added: brlcad/trunk/src/conv/step/ON_Brep.cpp
===================================================================
--- brlcad/trunk/src/conv/step/ON_Brep.cpp (rev 0)
+++ brlcad/trunk/src/conv/step/ON_Brep.cpp 2013-07-24 21:10:26 UTC (rev
56202)
@@ -0,0 +1,106 @@
+/* O N _ B R E P . C P P
+ * BRL-CAD
+ *
+ * Copyright (c) 2013 United States Government as represented by
+ * the U.S. Army Research Laboratory.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; see the file named COPYING for more
+ * information.
+ */
+/** @file ON_Brep.cpp
+ *
+ * File for writing out an ON_Brep structure into the STEPcode containers
+ *
+ */
+
+
+// Make entity arrays for each of the m_V, m_S, etc arrays and create step
instances of them,
+// starting with the basic ones.
+//
+// The array indicies in the ON_Brep will correspond to the step entity array
locations that
+// hold the step version of each entity.
+//
+// then, need to map the ON_Brep hierarchy to the corresponding STEP hierarchy
+//
+// brep -> advanced_brep_shape_representation
+// manifold_solid_brep
+// faces-> closed_shell
+// advanced_face
+//
+// surface-> bspline_surface_with_knots
+// cartesian_point
+//
+// outer 3d trim loop -> face_outer_bound
+// edge_loop
+// oriented_edge
+// edge_curve
+// bspline_curve_with_knots
+// vertex_point
+// cartesian_point
+//
+// 2d points -> point_on_surface
+// 1d points to bound curve -> point_on_curve
+//
+// 2d trimming curves -> pcurve using point_on_surface? almost doesn't look as
if there is a good AP203 way to represent 2d trimming curves...
+//
+
+STEPattribute * getAttribute(STEPentity *ent, const char *name)
+{
+ STEPattribute *attr, *attr_result;
+ ent->ResetAttributes();
+ while ((attr = ent->NextAttribute()) != NULL) {
+ std::string attrname = attr->Name();
+ if (attrname.compare(name) == 0) {
+ attr_result = attr;
+ break;
+ }
+ }
+ ent->ResetAttributes();
+ return attr_result;
+}
+
+bool ON_BRep_to_STEP(ON_Brep *brep)
+{
+ STEPentity ** vertex_cartesian_pt_array = new
STEPentity*[brep->m_V.Count()];
+ STEPentity ** vertex_pt_array = new STEPentity*[brep->m_V.Count()];
+ STEPentity ** bspline_curve_array = new STEPentity*[brep->m_E.Count()];
+ STEPentity ** edge_curve_array = new STEPentity*[brep->m_E.Count()];
+ STEPentity ** oriented_edge_array = new
STEPentity*[2*brep->m_E.Count()];
+ STEPentity ** edge_loop_array = new STEPentity*[brep->m_L.Count()];
+ STEPentity ** outer_bounds_array = new STEPentity*[brep->m_F.Count()];
+ STEPentity ** surface_array = new STEPentity*[brep->m_S.Count()];
+ STEPentity ** faces_array = new STEPentity*[brep->m_F.Count()];
+ STEPentity *closed_shell = new STEPentity;
+ STEPentity *manifold_solid_brep = new STEPentity;
+ STEPentity *advanced_brep = new STEPentity;
+
+ // Set up vertices and associated cartesian points
+ for (int i = 0; i < brep->m_V.Count(); ++i) {
+ // Cartesian points (actual 3D geometry)
+ vertex_cartesian_pt_array[i] =
registry->ObjCreate("CARTESIAN_POINT");
+ STEPentity *ent = vertex_cartesian_pt_array[i];
+ STEPattribute *coords = getAttribute(ent, "coordinates");
+ RealAggregate_ptr coord_vals = coords->coordinates_();
+ RealNode *xnode = new RealNode();
+ xnode->value = brep->m_V[i].x;
+ coord_vals.AddNode(xnode);
+ RealNode *ynode = new RealNode();
+ ynode->value = brep->m_V[i].y;
+ coord_vals.AddNode(ynode);
+ RealNode *znode = new RealNode();
+ znode->value = brep->m_V[i].z;
+ coord_vals.AddNode(znode);
+ // Vertex points (topological, references actual 3D geometry)
+ vertex_pt_array[i] = registry->ObjCreate("VERTEX_POINT");
+ }
+}
Property changes on: brlcad/trunk/src/conv/step/ON_Brep.cpp
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