diff --git a/src/gamematrix.cpp b/src/gamematrix.cpp
new file mode 100644
index 0000000..ad99c98
--- /dev/null
+++ b/src/gamematrix.cpp
@@ -0,0 +1,77 @@
+#include <gamematrix.h>
+
+
+static std::array<std::array<double,4>,4> gameMatrix::matmul(const std::array<std::array<double,4>,4>& A,
+                                                   const std::array<std::array<double,4>,4>& B);{
+    std::array<std::array<double,4>,4> result{};
+
+    for (int i = 0; i < 4; ++i) {
+        for (int j = 0; j < 4; ++j) {
+            double sum = 0.0;
+            for (int k = 0; k < 4; ++k) {
+                sum += A[i][k] * B[k][j];
+            }
+            result[i][j] = sum;
+        }
+    }
+
+    return result;
+}
+
+
+static std::array<std::array<double,4>,4> gameMatrix::rot3D(double angle_deg, char axis);
+{
+    double angle = angle_deg * M_PI / 180.0; // Grad → Radiant
+    double c = std::cos(angle);
+    double s = std::sin(angle);
+    std::array<std::array<double,4>,4> R{}; // alles 0 initialisiert
+
+    switch (axis) {
+    case 'x':
+        R = {{
+            {1, 0, 0, 0},
+            {0, c, -s, 0},
+            {0, s,  c, 0},
+            {0, 0, 0, 1}
+        }};
+        break;
+
+    case 'y':
+        R = {{
+            { c, 0, s, 0},
+            { 0, 1, 0, 0},
+            {-s, 0, c, 0},
+            { 0, 0, 0, 1}
+        }};
+        break;
+
+    case 'z':
+        R = {{
+            {c, -s, 0, 0},
+            {s,  c, 0, 0},
+            {0,  0, 1, 0},
+            {0,  0, 0, 1}
+        }};
+        break;
+
+    default:
+        throw std::invalid_argument("Axis must be 'x', 'y' or 'z'");
+    }
+
+    return R;
+}
+
+static std::array<std::array<double,4>,4> gameMatrix::translate(const std::array<double, 3>& pos);
+{
+    std::array<std::array<double,4>,4> T{{
+        {1, 0, 0, pos[0]},
+        {0, 1, 0, pos[1]},
+        {0, 0, 1, pos[2]},
+        {0, 0, 0, 1}
+    }};
+
+    return T;
+}
+
+// Created by Fabian Weber on 10.11.25.
+//
\ No newline at end of file