Wall & Cube

With a for loop, we were able to build an entire row of blocks with only two lines of code. What if we need to build a wall? We can certainly copy and paste that for loop multiple times. But a better solution would be to use nested for loop. How about a 3D cube? Just add another layer of loop!

To build a 2D wall, we need to loop through two directions: use i to iterate through x locations and j to iterate through y locations.

Brick wall:

# Build a 5 x 10 (width x height) wall
for i in range(5):    
    for j in range(1, 11):  
        game.set_block(Position(i, j, -15), 17)

Cube:

To build a 3D cube, we need to loop through three directions: i -> x, j -> y, k -> z

for i in range(5):   
    for j in range(1, 6):  
        for k in range(5):
            game.set_block(Position(i, j, k - 20), 18)

Exercises:

Please try the follow two structures:

#line of yellow columns
for i in range(0, 30, 4):
  for j in range(10):
    game.set_block(Position(i, j, -10), 59)    

# brick stairs
for i in range(10, 20):
  for k in range(-10, -5):
    game.set_block(Position(i, i-9, k), 17)

The picture of the wall, cube, yellow columns and the brick stairs:

Challenge

Here is a challenge project. Try to figure out how to build the structures in this picture:

Answer:

# black 
for j in range(0,10,2):
    for i in range (-j, j+1, 2):
        game.set_block(Position(i, j+1, -20), 1)

# blue        
for j in range(0,10,3):
    for i in range (-j, j+1, 3):
        for k in range(-j, j+1, 3):
            game.set_block(Position(i, j+1, k), 45)