added numba fast matmul

Author: alexlib

openptv_python/ray_tracing.py

@@ -2,7 +2,7 @@
 from typing import Tuple
 
 import numpy as np
-from numba import njit
+from numba import float64, int64, njit, prange
 
 from .calibration import Calibration
 from .parameters import MultimediaPar
@@ -306,3 +306,36 @@ def fast_ray_tracing(
 #     out = vec_add(tmp1, tmp2)
 
 #     return X, out
+
+# import numpy as np
+# import time
+
+@njit(float64[:, :](float64[:, :], float64[:, :], float64[:, :], int64, int64, int64), parallel=True)
+def matmul_numba_optimized(a, b, c, m, n, k):
+    for i in prange(m):
+        for j in range(k):
+            temp = 0.0
+            for ll in range(n):
+                temp += b[i, ll] * c[ll, j]
+            a[i, j] = temp
+    return a
+
+# # Define the same inputs as in the C test
+# b = np.array([
+#     [1.0, 2.0, 3.0],
+#     [4.0, 5.0, 6.0]
+# ], dtype=np.float64)
+# c = np.array([
+#     [1.0, 0.0],
+#     [0.0, 1.0],
+#     [1.0, 1.0]
+# ], dtype=np.float64)
+# a = np.zeros((2, 2), dtype=np.float64)
+
+# start_time = time.time()
+# matmul_numba_optimized(a, b, c, 2, 3, 2)
+# end_time = time.time()
+
+# print("Optimized Python Numba Time:", end_time - start_time, "seconds")
+# print("Result from Python function:")
+# print(a)