Create collisions.py

Added basic implementation of circle collision detection

physics/collisions.py

@@ -0,0 +1,21 @@
+# Basic implementation of the collision of two circles.
+def circle_collision(fpos: tuple[float, float, float], spos: tuple[float, float, float]) -> bool:
+    # difference by XY axes
+    dx = fpos[0] - spos[0]
+    dy = fpos[1] - spos[1]
+    
+    
+    # Euclidean distance between the centers of circles
+    distance = pow((pow(dx, 2) + pow(dy, 2)), 0.5)
+    
+    # minimum possible distance between circles, without collision
+    min_distance = fpos[2] + fpos[2]
+    collide = distance < min_distance
+    
+    # If actual distance smaller than minimal possible, cirlces collides
+    return collide
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()