diff --git a/port/assimp_rs/src/structs/matrix.rs b/port/assimp_rs/src/structs/matrix.rs
index e69de29bb..4673b2d69 100644
--- a/port/assimp_rs/src/structs/matrix.rs
+++ b/port/assimp_rs/src/structs/matrix.rs
@@ -0,0 +1,64 @@
+#[derive(Clone, Debug, Copy)]
+struct Matrix3x3 {
+    a1: f32,
+    a2: f32,
+    a3: f32,
+    b1: f32,
+    b2: f32,
+    b3: f32,
+    c1: f32,
+    c2: f32,
+    c3: f32
+}
+
+#[derive(Clone, Debug, Copy)]
+struct Matrix4x4 {
+    a1: f32,
+    a2: f32,
+    a3: f32,
+    a4: f32,
+    b1: f32,
+    b2: f32,
+    b3: f32,
+    b4: f32,
+    c1: f32,
+    c2: f32,
+    c3: f32,
+    c4: f32,
+    d1: f32,
+    d2: f32,
+    d3: f32,
+    d4: f32
+}
+
+impl Matrix3x3 {
+    pub fn new(
+        a1_f32: f32, a2_f32: f32, a3_f32: f32,
+        b1_f32: f32, b2_f32: f32, b3_f32: f32,
+        c1_f32: f32, c2_f32: f32, c3_f32: f32
+    ) -> Matrix3x3 {
+        Matrix3x3 {
+            a1: a1_f32, a2: a2_f32, a3: a3_f32,
+            b1: b1_f32, b2: b2_f32, b3: b3_f32,
+            c1: c1_f32, c2: c2_f32, c3: c3_f32
+        }
+    }
+}
+
+impl Matrix4x4 {
+    pub fn new(
+        a1_f32: f32, a2_f32: f32, a3_f32: f32, a4_f32: f32,
+        b1_f32: f32, b2_f32: f32, b3_f32: f32, b4_f32: f32,
+        c1_f32: f32, c2_f32: f32, c3_f32: f32, c4_f32: f32,
+        d1_f32: f32, d2_f32: f32, d3_f32: f32, d4_f32: f32
+    ) -> Matrix4x4 {
+        Matrix4x4 {
+            a1: a1_f32, a2: a2_f32, a3: a3_f32, a4: a4_f32,
+            b1: b1_f32, b2: b2_f32, b3: b3_f32, b4: b4_f32,
+            c1: c1_f32, c2: c2_f32, c3: c3_f32, c4: c4_f32,
+            d1: d1_f32, d2: d2_f32, d3: d3_f32, d4: d4_f32 
+        }
+    }
+}
+
+