func for make matrix identity

src/cglm-mat.c

@@ -19,6 +19,12 @@ glmc_mat4_copy(mat4 mat, mat4 dest) {
   glm_mat4_copy(mat, dest);
 }
 
+CGLM_EXPORT
+void
+glmc_mat4_identity(mat4 mat) {
+  glm_mat4_identity(mat);
+}
+
 CGLM_EXPORT
 void
 glmc_mat4_pick3(mat4 mat, mat3 dest) {

src/cglm-mat3.c

@@ -13,6 +13,12 @@ glmc_mat3_copy(mat3 mat, mat3 dest) {
   glm_mat3_copy(mat, dest);
 }
 
+CGLM_EXPORT
+void
+glmc_mat3_identity(mat3 mat) {
+  glm_mat3_identity(mat);
+}
+
 CGLM_EXPORT
 void
 glmc_mat3_mul(mat3 m1, mat3 m2, mat3 dest) {