diff --git a/COPYING.LESSER b/COPYING.LESSER
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new mode 100755
diff --git a/Makefile b/Makefile
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new mode 100755
diff --git a/exemple/exemple_geometry.c b/exemple/exemple_geometry.c
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diff --git a/exemple/exemple_matrix.c b/exemple/exemple_matrix.c
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diff --git a/sweet.h b/sweet.h
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new mode 100755
diff --git a/sweet_geometry.c b/sweet_geometry.c
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diff --git a/sweet_geometry.h b/sweet_geometry.h
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diff --git a/sweet_macro.h b/sweet_macro.h
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new mode 100755
index c4dc6f3..7b94414
--- a/sweet_macro.h
+++ b/sweet_macro.h
@@ -31,5 +31,14 @@
 #define mat3_new(...) _OVERLOAD_3_(__VA_ARGS__, mat3_new_3v, mat3_new_2v, mat3_new_m4, NULL)(__VA_ARGS__)
 #define mat4_new(...) _OVERLOAD_4_(__VA_ARGS__, mat4_new_4v, mat4_new_3v, mat4_new_2v, mat4_new_m4, NULL)(__VA_ARGS__)
 
+#define swap(a, b, type) \
+{\
+    type t;\
+    t = a;\
+    a = b;\
+    b = t;\
+\
+}
+
 #endif
 
diff --git a/sweet_math.c b/sweet_math.c
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diff --git a/sweet_math.h b/sweet_math.h
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new mode 100755
index 221aa19..7b157e8
--- a/sweet_math.h
+++ b/sweet_math.h
@@ -55,6 +55,9 @@
 #define float_approx_zero(a, epsilon) \
                 (a <= (epsilon) && a >= (epsilon))
 
+#define max(a, b) (a >= b ? a : b)
+#define min(a, b) (a <= b ? a : b)
+
 /* Vector */
 
 vec2 vec2_zero();
diff --git a/sweet_matrix.c b/sweet_matrix.c
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diff --git a/sweet_matrix.h b/sweet_matrix.h
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diff --git a/sweet_types.h b/sweet_types.h
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