Create drs_logic.py

utils/drs_logic.py

@@ -0,0 +1,33 @@
+# backend/utils/drs_logic.py
+def predict_impact(ball_positions: list) -> tuple:
+    """
+    Predict the ball's impact point on the stumps or pad based on trajectory.
+    Returns (x, y) coordinates of the predicted impact point.
+    """
+    if not ball_positions or len(ball_positions) < 2:
+        return None
+    
+    x1, y1 = ball_positions[-2]
+    x2, y2 = ball_positions[-1]
+    
+    stump_y = 600  # Adjust based on video calibration
+    if y2 == y1:
+        return None
+    
+    slope = (x2 - x1) / (y2 - y1)
+    impact_x = x1 + slope * (stump_y - y1)
+    
+    return (impact_x, stump_y)
+
+def is_drs_out(impact_point: tuple) -> bool:
+    """
+    Determine if the ball meets DRS criteria for an Out decision.
+    Returns True (Out) or False (Not Out).
+    """
+    if impact_point is None:
+        return False
+    
+    x, y = impact_point
+    stump_x_min, stump_x_max = 400, 800  # Adjust based on video calibration
+    
+    return stump_x_min <= x <= stump_x_max