- Various tweaks to make the code build with gcc-2.95 under linux.

- added a -n <num> option to specify a minimum number of nodes to emit
  irregardless of the error threshold.

src/Prep/Terra/GreedyInsert.cc

@@ -209,7 +209,8 @@ Edge *GreedySubdivision::select(int sx, int sy, Triangle *t)
 
     is_used(sx,sy) = DATA_POINT_USED;
     count++;
-    return insert(Vec2(sx,sy), t);
+    Vec2 tmp(sx,sy);
+    return insert(tmp, t);
 }
 
 

src/Prep/Terra/Makefile-gcc-2.95

@@ -0,0 +1,89 @@
+#################################################################
+#
+# Configuration variables.
+# You should change these to fit your system.
+#
+
+CC = cc
+C++ = g++-2.95
+
+# For compiling on SGI's with the pre-5.3 (ie. cfront-based) compiler:
+# add '-ptr/tmp/terra_ptrepository' to OPTFLAGS
+# add '-pte.cc' to LFLAGS
+
+OPTFLAGS = -O2 -g 
+#OPTFLAGS = -g -mips2 
+# OPTFLAGS = -O2 -mips2
+
+GUI_LIBS = -lglut -lGLU -lGL -L/usr/X11R6/lib -lXmu -lX11
+LIBS =
+
+#
+# This defines the location of the GLUT libraries
+#
+ANIM = /afs/cs/project/anim/garland
+GLUT_FLAGS = 
+GLUT_INCDIR = $(ANIM)/include
+GLUT_LIBDIR = $(ANIM)/lib
+
+#
+# Include any other search directories you need here
+#
+INCDIR = -I$(GLUT_INCDIR)
+LIBDIR = -L$(GLUT_LIBDIR)
+
+#
+# These are the flags for compilation (CFLAGS) and linking (LFLAGS) 
+#
+# CFLAGS = $(INCDIR) $(OPTFLAGS) -DSAFETY
+CFLAGS = $(INCDIR) $(OPTFLAGS) -DSAFETY -DIOSTREAMH
+LFLAGS = $(LIBDIR) $(OPTFLAGS)
+
+
+#################################################################
+#
+# Rules for building the Terra programs.
+# You should not need to change anything here.
+#
+
+.SUFFIXES: .cc
+.cc.o:
+	$(C++) $(CFLAGS) -c $<
+
+.C.o:
+	$(C++) $(CFLAGS) -c $<
+
+
+BASE_SRCS = Quadedge.cc Subdivision.cc Map.cc Mask.cc cmdline.cc \
+            GreedyInsert.cc Heap.cc greedy.cc output.cc
+GUI_SRCS  = glHacks.cc gui.cc xterra.cc
+
+TERRA_SRCS = terra.cc $(BASE_SRCS)
+XTERRA_SRCS = $(GUI_SRCS) $(BASE_SRCS)
+
+TERRA_OBJS = $(TERRA_SRCS:.cc=.o)
+XTERRA_OBJS = $(XTERRA_SRCS:.cc=.o)
+
+
+TARGETS = terra xterra
+
+all: $(TARGETS)
+
+terra: $(TERRA_OBJS)
+	$(C++) $(LFLAGS) -o terra $(TERRA_OBJS) $(LIBS)
+
+xterra: $(XTERRA_OBJS)
+	$(C++) $(LFLAGS) -o xterra $(XTERRA_OBJS) $(GUI_LIBS) $(LIBS)
+
+clean :
+	/bin/rm -f $(XTERRA_OBJS) $(TERRA_OBJS) $(TARGETS)
+	/bin/rm -f -r ii_files ptrepository
+	find . -name '*~'    -print -exec rm -f {} \;
+	find . -name 'core' -print -exec rm -f {} \;
+
+depend :
+	touch Makefile.depend
+	makedepend -fMakefile.depend $(INCDIR) -I/usr/include/CC $(BASE_SRCS) $(GUI_SRCS)
+	/bin/rm -f Makefile.depend.bak
+
+sinclude Makefile.depend

src/Prep/Terra/Vec2.h

@@ -1,6 +1,8 @@
 #ifndef VEC2_INCLUDED // -*- C++ -*-
 #define VEC2_INCLUDED
 
+#include <iostream>
+
 class Vec2 {
 protected:
     real elt[2];

src/Prep/Terra/cmdline.cc

@@ -1,3 +1,4 @@
+#include <unistd.h>
 #include <stdlib.h>
 #include <fstream.h>
 #include <string.h>
@@ -11,6 +12,7 @@ ImportMask *MASK;
 
 
 real error_threshold = 0.0;
+int  min_points      = -1;
 int  point_limit     = -1;
 real height_scale    = 1.0;
 FileFormat output_format;
@@ -18,10 +20,11 @@ char *output_filename = NULL;
 char *mask_filename   = NULL;
 char *script_filename = NULL;
 
-static char *options = "e:p:h:o:m:s:";
+static char *options = "e:n:p:h:o:m:s:";
 
 static char *usage_string =
 "-e <thresh>      Sets the tolerable error threshold\n"
+"-n <count>       Sets the *minimum* number of points regardless of <thresh>\n"
 "-p <count>       Sets the maximum number of allowable points\n"
 "-h <factor>      Sets the height scaling factor.  For example,\n"
 "                 if grid points are 25m apart, use a factor of 0.04\n"
@@ -59,6 +62,11 @@ void process_cmdline(int argc, char **argv)
 	    cerr << "    Setting error threshold to " <<error_threshold <<endl;
 	    break;
 
+	case 'n':
+	    min_points = atoi(optarg);
+	    cerr << "    Setting minumum points to " << min_points << endl;
+	    break;
+
 	case 'p':
 	    point_limit = atoi(optarg);
 	    cerr << "    Setting point limit to " << point_limit << endl;
@@ -159,6 +167,9 @@ void process_cmdline(int argc, char **argv)
 
     ////////////////////////////////////////////////////////////////
 
+    if( min_points < 0 )
+	min_points = 1;
+
     if( point_limit < 0 )
 	point_limit = DEM->width * DEM->height;
 

src/Prep/Terra/glHacks.h

@@ -1,6 +1,8 @@
 #ifndef GLHACKS_INCLUDED // -*- C++ -*-
 #define GLHACKS_INCLUDED
 
+#include <iostream>
+
 #include <GL/glx.h>
 #include <GL/gl.h>
 #include <GL/glu.h>

src/Prep/Terra/greedy.cc

@@ -63,8 +63,11 @@ void subsample_insertion(int target_width)
 
 inline int goal_not_met()
 {
-    return mesh->maxError() > error_threshold &&
-	   mesh->pointCount() < point_limit;
+    return
+        ( mesh->maxError() > error_threshold &&
+          mesh->pointCount() < point_limit ) ||
+        mesh->pointCount() < min_points;
+        
 }
 
 static void announce_goal()

src/Prep/Terra/gui.cc

@@ -433,12 +433,15 @@ void gui_interact()
 //
 ////////////////////////////////////////////////////////////////////////
 
+#if 0
 extern "C" {
 #include <GL/glutint.h>
 }
+#endif
 
 void xglutKeepAspect(float width, float height)
 {
+#if 0
     Window win;
     XSizeHints hints;
 
@@ -453,4 +456,5 @@ void xglutKeepAspect(float width, float height)
 
         XSetWMNormalHints(__glutDisplay, win, &hints);
     }
+#endif
 }

src/Prep/Terra/terra.h

@@ -11,6 +11,7 @@ extern Map *DEM;
 extern ImportMask *MASK;
 
 extern real error_threshold;
+extern int min_points;
 extern int point_limit;
 extern real height_scale;
 enum FileFormat {NULLfile, TINfile, EPSfile, DEMfile, OBJfile, RMSfile};