1 files changed, 16 insertions, 0 deletions

diff --git a/src/morpher/matrix.c b/src/morpher/matrix.c
new file mode 100644
index 0000000..2fe1193
--- /dev/null
+++ b/src/morpher/matrix.c
@@ -0,0 +1,16 @@
+#include "morpher/matrix.h"
+
+IntVector matrix_int_det2(IntVector u11, IntVector u12,
+                          IntVector u21, IntVector u22) {
+
+  return u11 * u22 - u12 * u21;
+}
+
+IntVector matrix_int_det3(IntVector u11, IntVector u12, IntVector u13,
+                          IntVector u21, IntVector u22, IntVector u23,
+                          IntVector u31, IntVector u32, IntVector u33) {
+
+  return u11 * matrix_int_det2(u22, u23, u32, u33)
+         - u21 * matrix_int_det2(u12, u13, u32, u33)
+         + u31 * matrix_int_det2(u12, u13, u22, u23);
+}