[brlcad-commits] SF.net SVN: brlcad:[55336] brlcad/trunk/src/libbrep

[<sta...@us...>]

Revision: 55336
          http://sourceforge.net/p/brlcad/code/55336
Author:   starseeker
Date:     2013-05-08 17:15:28 +0000 (Wed, 08 May 2013)
Log Message:
-----------
Add a 'tools' file for holding useful routines, analgous to the opennurbs_brep_tools.cpp file.  Start with the sub-surface extraction routine.

Modified Paths:
--------------
    brlcad/trunk/src/libbrep/CMakeLists.txt

Added Paths:
-----------
    brlcad/trunk/src/libbrep/libbrep_brep_tools.cpp
    brlcad/trunk/src/libbrep/libbrep_brep_tools.h

Modified: brlcad/trunk/src/libbrep/CMakeLists.txt
===================================================================
--- brlcad/trunk/src/libbrep/CMakeLists.txt	2013-05-08 16:59:34 UTC (rev 55335)
+++ brlcad/trunk/src/libbrep/CMakeLists.txt	2013-05-08 17:15:28 UTC (rev 55336)
@@ -20,6 +20,7 @@
 
 set(LIBBREP_SOURCES
   intersect.cpp
+  libbrep_brep_tools.cpp
   opennurbs_ext.cpp
   #opennurbs_fit.cpp
   PullbackCurve.cpp
@@ -27,6 +28,7 @@
   )
 
 set(libbrep_ignored_files
+  libbrep_brep_tools.h
   opennurbs_fit.h
   opennurbs_fit.cpp
   PullbackCurve.h

Added: brlcad/trunk/src/libbrep/libbrep_brep_tools.cpp
===================================================================
--- brlcad/trunk/src/libbrep/libbrep_brep_tools.cpp	                        (rev 0)
+++ brlcad/trunk/src/libbrep/libbrep_brep_tools.cpp	2013-05-08 17:15:28 UTC (rev 55336)
@@ -0,0 +1,119 @@
+/*          L I B B R E P _ B R E P _ T O O L S . 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 libbrep_brep_tools.cpp
+ *
+ * Utility routines for working with geometry.
+ */
+
+#include <vector>
+#include <iostream>
+
+#include "opennurbs.h"
+
+// For any pre-existing surface passed as one of the t* args, this is a no-op
+void ON_Surface_Create_Scratch_Surfaces(
+        ON_Surface **t1,
+        ON_Surface **t2,
+        ON_Surface **t3,
+        ON_Surface **t4)
+{
+    if (!(*t1)) {
+        ON_NurbsSurface *nt1 = ON_NurbsSurface::New();
+        (*t1)= (ON_Surface *)(nt1);
+    }
+    if (!(*t2)) {
+        ON_NurbsSurface *nt2 = ON_NurbsSurface::New();
+        (*t2)= (ON_Surface *)(nt2);
+    }
+    if (!(*t3)) {
+        ON_NurbsSurface *nt3 = ON_NurbsSurface::New();
+        (*t3)= (ON_Surface *)(nt3);
+    }
+    if (!(*t4)) {
+        ON_NurbsSurface *nt4 = ON_NurbsSurface::New();
+        (*t4)= (ON_Surface *)(nt4);
+    }
+}
+
+bool ON_Surface_SubSurface(
+        const ON_Surface *srf,
+        ON_Interval *u_val,
+        ON_Interval *v_val,
+        ON_Surface **t1,
+        ON_Surface **t2,
+        ON_Surface **t3,
+        ON_Surface **t4,
+        ON_Surface **result
+	)
+{
+    bool split = true;
+    int t1_del, t2_del, t3_del;
+
+    // Make sure we have intervals with non-zero lengths
+    if ((u_val->Length() <= ON_ZERO_TOLERANCE) || (v_val->Length() <= ON_ZERO_TOLERANCE))
+        return false;
+
+    // If we have the original surface domain, just return true 
+    if ((fabs(u_val->Min() - srf->Domain(0).m_t[0]) <= ON_ZERO_TOLERANCE) &&
+        (fabs(u_val->Max() - srf->Domain(0).m_t[1]) <= ON_ZERO_TOLERANCE) &&
+        (fabs(v_val->Min() - srf->Domain(1).m_t[0]) <= ON_ZERO_TOLERANCE) &&
+        (fabs(v_val->Max() - srf->Domain(1).m_t[1]) <= ON_ZERO_TOLERANCE)) {
+        (*result) = (ON_Surface *)srf;
+        return true;
+    }
+    t1_del = (*t1) ? (0) : (1);
+    t2_del = (*t2) ? (0) : (1);
+    t3_del = (*t3) ? (0) : (1);
+    ON_Surface *ssplit = (ON_Surface *)srf;
+    ON_Surface_Create_Scratch_Surfaces(t1, t2, t3, t4);
+    if (fabs(u_val->Min() - srf->Domain(0).m_t[0]) > ON_ZERO_TOLERANCE) {
+        split = ssplit->Split(0, u_val->Min(), *t1, *t2);
+        ssplit = *t2;
+    }
+    if ((fabs(u_val->Max() - srf->Domain(0).m_t[1]) > ON_ZERO_TOLERANCE) && split) {
+        split = ssplit->Split(0, u_val->Max(), *t1, *t3);
+        ssplit = *t1;
+    }
+    if ((fabs(v_val->Min() - srf->Domain(1).m_t[0]) > ON_ZERO_TOLERANCE) && split) {
+        split = ssplit->Split(1, v_val->Min(), *t2, *t3);
+        ssplit = *t3;
+    }
+    if ((fabs(v_val->Max() - srf->Domain(1).m_t[1]) > ON_ZERO_TOLERANCE) && split) {
+        split = ssplit->Split(1, v_val->Max(), *t4, *t2);
+        (*result) = *t4;
+    }
+    if (t1_del) delete *t1;
+    if (t2_del) delete *t2;
+    if (t3_del) delete *t3;
+    (*result)->SetDomain(0,u_val->Min(), u_val->Max());
+    (*result)->SetDomain(1,v_val->Min(), v_val->Max());
+    return split;
+}
+
+
+
+// Local Variables:
+// tab-width: 8
+// mode: C++
+// c-basic-offset: 4
+// indent-tabs-mode: t
+// c-file-style: "stroustrup"
+// End:
+// ex: shiftwidth=4 tabstop=8


Property changes on: brlcad/trunk/src/libbrep/libbrep_brep_tools.cpp
___________________________________________________________________
Added: svn:mime-type
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+text/plain
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Added: svn:eol-style
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+native
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Added: brlcad/trunk/src/libbrep/libbrep_brep_tools.h
===================================================================
--- brlcad/trunk/src/libbrep/libbrep_brep_tools.h	                        (rev 0)
+++ brlcad/trunk/src/libbrep/libbrep_brep_tools.h	2013-05-08 17:15:28 UTC (rev 55336)
@@ -0,0 +1,92 @@
+/*            L I B B R E P _ B R E P _ T O O L S . H
+ * 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.
+ */
+/** @addtogroup libbrep */
+/** @{ */
+/** @file libbrep_brep_tools.h
+ *
+ *  Utility routines for working with geometry.
+ */
+
+#ifndef __LIBBREP_BREP_TOOLS
+#define __LIBBREP_BREP_TOOLS
+
+#include <vector>
+
+#include "opennurbs.h"
+
+#ifndef NURBS_EXPORT
+#  if defined(NURBS_DLL_EXPORTS) && defined(NURBS_DLL_IMPORTS)
+#    error "Only NURBS_DLL_EXPORTS or NURBS_DLL_IMPORTS can be defined, not both."
+#  elif defined(NURBS_DLL_EXPORTS)
+#    define NURBS_EXPORT __declspec(dllexport)
+#  elif defined(NURBS_DLL_IMPORTS)
+#    define NURBS_EXPORT __declspec(dllimport)
+#  else
+#    define NURBS_EXPORT
+#  endif
+#endif
+
+/**
+  \brief Create a surface based on a subset of a parent surface
+
+  Create a NURBS surface that corresponds to a subset
+  of an input surface, as defined by UV intervals. The
+  t parameters may be NULL, in which case working surfaces
+  will be created by the function.  If supplied, existing 
+  surfaces are reused to avoid extra malloc operations 
+  and memory usage associated with creating the working
+  surfaces.
+
+  @param srf parent ON_Surface
+  @param u_val U interval of proposed subsurface
+  @param v_val V interval of proposed subsurface
+  @param t1 surface used during split algorithm
+  @param t2 surface used during split algorithm
+  @param t3 surface used during split algorithm
+  @param t4 surface used during split algorithm
+  @param[out] result final subsurface
+
+  @return @c true if surface creation is successful or if the subsurface
+  is the same as the parent surface, @c false if one or more split
+  operations failed.
+*/
+NURBS_EXPORT 
+bool ON_Surface_SubSurface(
+        const ON_Surface *srf,
+        ON_Interval *u_val,
+        ON_Interval *v_val,
+        ON_Surface **t1,
+        ON_Surface **t2,
+        ON_Surface **t3,
+        ON_Surface **t4,
+        ON_Surface **result
+	);
+
+#endif /* __LIBBREP_BREP_TOOLS */
+/** @} */
+
+// Local Variables:
+// tab-width: 8
+// mode: C++
+// c-basic-offset: 4
+// indent-tabs-mode: t
+// c-file-style: "stroustrup"
+// End:
+// ex: shiftwidth=4 tabstop=8


Property changes on: brlcad/trunk/src/libbrep/libbrep_brep_tools.h
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Added: svn:mime-type
## -0,0 +1 ##
+text/plain
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Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
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