diff --git a/.gitignore b/.gitignore
index 9efe977..f7d9566 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,7 @@ libbubulles.a
 tbb
 gmon.out
 dummy-file
+
+tools/covid-19.obj
+tools/read_obj
+
diff --git a/Makefile b/Makefile
index 90f4f4a..ec9c5cb 100644
--- a/Makefile
+++ b/Makefile
@@ -12,12 +12,15 @@ CC = gcc
 
 OPT = -Wall -g -DDEBUG_LEVEL=0 -DMUST_ABORT
 
-libbubulles.a:	bubulles.o
+libbubulles.a:	bubulles.o importobj.o
 	ar r $@ $?
 
 bubulles.o:	bubulles.c bubulles.h Makefile
 	$(CC) $(OPT) -c $< 
 
+importobj.o:	importobj.c bubulles.h Makefile
+	$(CC) $(OPT) -c $< 
+
 # ------------------------------------------------
 # --- build some tests and tools
 
diff --git a/bubulles.h b/bubulles.h
index df8a9c5..feff58f 100644
--- a/bubulles.h
+++ b/bubulles.h
@@ -4,7 +4,7 @@
 
 /* --------------------------------------------------------------------- */
 
-#define LIBBB_VERSION		52
+#define LIBBB_VERSION		53
 
 #define SZ_BUBULLE_TEXT		51		/* arbitrary value */
 
diff --git a/doc/tricks.txt b/doc/tricks.txt
new file mode 100644
index 0000000..e69de29
diff --git a/importobj.c b/importobj.c
new file mode 100644
index 0000000..94496c7
--- /dev/null
+++ b/importobj.c
@@ -0,0 +1,26 @@
+/*
+	          LIBBUBULLES
+
+	some functions for importing bubulles from dot-OBJ files.
+*/
+
+#include  <stdio.h>
+#include  <stdlib.h>
+#include  <string.h>
+
+#include  "bubulles.h"
+
+/* --------------------------------------------------------------------- */
+
+int try_to_read_an_OBJ_file(char *fname, int notused)
+{
+FILE		*fpin;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( '%s' %d)\n", fname, notused);
+#endif
+
+return -7800;
+}
+
+/* --------------------------------------------------------------------- */
diff --git a/tools/Makefile b/tools/Makefile
new file mode 100644
index 0000000..1cb716b
--- /dev/null
+++ b/tools/Makefile
@@ -0,0 +1,5 @@
+
+BBFUNCS = ../libbubulles.a 
+
+read_obj:	read_obj.c Makefile ${BBFUNCS}
+	gcc -Wall  $< ${BBFUNCS} -o $@
diff --git a/tools/read_obj.c b/tools/read_obj.c
new file mode 100644
index 0000000..a5cc6c3
--- /dev/null
+++ b/tools/read_obj.c
@@ -0,0 +1,25 @@
+/*
+     tentatives de lecture des OBJ
+*/
+
+#include	<stdio.h>
+#include	<stdlib.h>
+#include	"../bubulles.h"
+
+int main(int argc, char *argv[])
+{
+int		foo;
+
+if (2 != argc) {
+	bubulles_version(1);
+	exit(0);
+	}
+
+
+// foo = try_to_read_an_OBJ_file(argv[1], 0);
+
+
+
+
+return 0;
+}