To create a test case generator for the provided problem statement "Spaceship UAZ Advance," we need to generate random coordinates for the UAZ Advance spacecraft, the enemy, and the vertices of the barrier. The coordinates will be within the constraints of -100 to 100 for x, y, and z values. Here's a Python function that generates test cases for this problem:

```python
import random

def generate_coordinate():
    return random.randint(-100, 100)

def generate_unique_coordinate(existing_coordinates):
    while True:
        coord = (generate_coordinate(), generate_coordinate(), generate_coordinate())
        if coord not in existing_coordinates:
            return coord

def tcgen_spaceship_uaz_advance():
    # Set of coordinates to ensure uniqueness
    coordinates = set()
    
    # UAZ Advance spacecraft coordinates
    uaz_advance = generate_unique_coordinate(coordinates)
    coordinates.add(uaz_advance)
    
    # Enemy coordinates
    enemy = generate_unique_coordinate(coordinates)
    coordinates.add(enemy)
    
    # Barrier vertices coordinates
    barrier_vertex1 = generate_unique_coordinate(coordinates)
    coordinates.add(barrier_vertex1)
    
    barrier_vertex2 = generate_unique_coordinate(coordinates)
    coordinates.add(barrier_vertex2)
    
    barrier_vertex3 = generate_unique_coordinate(coordinates)
    coordinates.add(barrier_vertex3)
    
    return uaz_advance, enemy, barrier_vertex1, barrier_vertex2, barrier_vertex3

# Example usage
uaz_advance, enemy, vertex1, vertex2, vertex3 = tcgen_spaceship_uaz_advance()
print("UAZ Advance spacecraft coordinates:", uaz_advance)
print("Enemy coordinates:", enemy)
print("Barrier vertex 1 coordinates:", vertex1)
print("Barrier vertex 2 coordinates:", vertex2)
print("Barrier vertex 3 coordinates:", vertex3)
```

This function generates random coordinates for the UAZ Advance spacecraft, the enemy, and the three vertices of the barrier. It ensures that no two points have the same coordinates, as the generator checks for uniqueness before adding a coordinate to the set of existing coordinates.