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A trick that can help AI's to write POV-Ray code, "force" them to write simple
python code, only using arrays. Classes and numpy & co are not allowed. AI's are
well trained on Python and bare bones python isn't far of POV-Ray.
I didn't test any of the code. It's just for illustatration.
Me: "can you generate python code for a red black tree, without the use of
external libraries (like numpy). Only use arrays and no classes"
it to three attempts before it (Copilot) dropped classes.
%<------%<------%<------
# Implementation of Red-Black Tree in Python using arrays and no classes
# NIL node is represented by 0
NIL = 0
# Tree structure as arrays
tree = [None] # Store keys
color = [NIL] # Color array: 0 for BLACK, 1 for RED
left = [NIL]
right = [NIL]
parent = [NIL]
# Root of the tree
root = NIL
def insert(key):
global root
new_node = len(tree)
tree.append(key)
color.append(1) # New node is RED
left.append(NIL)
right.append(NIL)
parent.append(NIL)
parent_node = NIL
current = root
while current != NIL:
parent_node = current
if key < tree[current]:
current = left[current]
else:
current = right[current]
parent[new_node] = parent_node
if parent_node == NIL:
root = new_node
elif key < tree[parent_node]:
left[parent_node] = new_node
else:
right[parent_node] = new_node
insert_fixup(new_node)
def insert_fixup(node):
global root
while node != root and color[parent[node]] == 1:
if parent[node] == left[parent[parent[node]]]:
uncle = right[parent[parent[node]]]
if color[uncle] == 1:
color[parent[node]] = 0
color[uncle] = 0
color[parent[parent[node]]] = 1
node = parent[parent[node]]
else:
if node == right[parent[node]]:
node = parent[node]
left_rotate(node)
color[parent[node]] = 0
color[parent[parent[node]]] = 1
right_rotate(parent[parent[node]])
else:
uncle = left[parent[parent[node]]]
if color[uncle] == 1:
color[parent[node]] = 0
color[uncle] = 0
color[parent[parent[node]]] = 1
node = parent[parent[node]]
else:
if node == left[parent[node]]:
node = parent[node]
right_rotate(node)
color[parent[node]] = 0
color[parent[parent[node]]] = 1
left_rotate(parent[parent[node]])
color[root] = 0
def left_rotate(x):
global root
y = right[x]
right[x] = left[y]
if left[y] != NIL:
parent[left[y]] = x
parent[y] = parent[x]
if parent[x] == NIL:
root = y
elif x == left[parent[x]]:
left[parent[x]] = y
else:
right[parent[x]] = y
left[y] = x
parent[x] = y
def right_rotate(y):
global root
x = left[y]
left[y] = right[x]
if right[x] != NIL:
parent[right[x]] = y
parent[x] = parent[y]
if parent[y] == NIL:
root = x
elif y == right[parent[y]]:
right[parent[y]] = x
else:
left[parent[y]] = x
right[x] = y
parent[y] = x
# Example usage
insert(10)
insert(20)
insert(30)
insert(15)
insert(25)
# For debugging: print the tree structure
def print_tree():
for i in range(1, len(tree)):
print(f"Node {i}: key={tree[i]}, color={'RED' if color[i] == 1 else
'BLACK'}, left={left[i]}, right={right[i]}, parent={parent[i]}")
print_tree()
%<------%<------%<------
Me: "can you convert the code to POV-Ray?"
%<------%<------%<------
#declare NIL = 0; // NIL node is represented by 0
#declare tree = array[1] { NIL }; // Tree structure as an array
#declare color = array[1] { NIL }; // Color array: 0 for BLACK, 1 for RED
#declare left = array[1] { NIL };
#declare right = array[1] { NIL };
#declare parent = array[1] { NIL };
#declare root = NIL; // Root of the tree
#macro Insert(key)
#declare new_node = dimension_size(tree, 1);
#declare tree = concat(tree, array[1] { key });
#declare color = concat(color, array[1] { 1 }); // New node is RED
#declare left = concat(left, array[1] { NIL });
#declare right = concat(right, array[1] { NIL });
#declare parent = concat(parent, array[1] { NIL });
#declare parent_node = NIL;
#declare current = root;
#while (current != NIL)
#declare parent_node = current;
#if (key < tree[current])
#declare current = left[current];
#else
#declare current = right[current];
#end
#end
#declare parent[new_node] = parent_node;
#if (parent_node == NIL)
#declare root = new_node;
#elif (key < tree[parent_node])
#declare left[parent_node] = new_node;
#else
#declare right[parent_node] = new_node;
#end
InsertFixup(new_node);
#end
#macro InsertFixup(node)
#while (node != root & color[parent[node]] == 1)
#if (parent[node] == left[parent[parent[node]]])
#declare uncle = right[parent[parent[node]]];
#if (color[uncle] == 1)
#declare color[parent[node]] = 0;
#declare color[uncle] = 0;
#declare color[parent[parent[node]]] = 1;
#declare node = parent[parent[node]];
#else
#if (node == right[parent[node]])
#declare node = parent[node];
LeftRotate(node);
#end
#declare color[parent[node]] = 0;
#declare color[parent[parent[node]]] = 1;
RightRotate(parent[parent[node]]);
#end
#else
#declare uncle = left[parent[parent[node]]];
#if (color[uncle] == 1)
#declare color[parent[node]] = 0;
#declare color[uncle] = 0;
#declare color[parent[parent[node]]] = 1;
#declare node = parent[parent[node]];
#else
#if (node == left[parent[node]])
#declare node = parent[node];
RightRotate(node);
#end
#declare color[parent[node]] = 0;
#declare color[parent[parent[node]]] = 1;
LeftRotate(parent[parent[node]]);
#end
#end
#end
#declare color[root] = 0;
#end
#macro LeftRotate(x)
#declare y = right[x];
#declare right[x] = left[y];
#if (left[y] != NIL)
#declare parent[left[y]] = x;
#end
#declare parent[y] = parent[x];
#if (parent[x] == NIL)
#declare root = y;
#elif (x == left[parent[x]])
#declare left[parent[x]] = y;
#else
#declare right[parent[x]] = y;
#end
#declare left[y] = x;
#declare parent[x] = y;
#end
#macro RightRotate(y)
#declare x = left[y];
#declare left[y] = right[x];
#if (right[x] != NIL)
#declare parent[right[x]] = y;
#end
#declare parent[x] = parent[y];
#if (parent[y] == NIL)
#declare root = x;
#elif (y == right[parent[y]])
#declare right[parent[y]] = x;
#else
#declare left[parent[y]] = x;
#end
#declare right[x] = y;
#declare parent[y] = x;
#end
// Example usage
Insert(10);
Insert(20);
Insert(30);
Insert(15);
Insert(25);
%<------%<------%<------
ingo
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