bsp_level_generator: Add 3D floor and wall generation

Still need to figure out how to place and generator doors between rooms

1 files changed, 64 insertions, 27 deletions

diff --git a/scripts/bsp_level_generator.gd b/scripts/bsp_level_generator.gd
index af34e0b..b6cb316 100644
--- a/scripts/bsp_level_generator.gd
+++ b/scripts/bsp_level_generator.gd
@@ -1,20 +1,27 @@
-extends Node2D
+extends Node3D
 
+@export_category("Level Generator")
 @export var width: int = 40
 @export var height: int = 40
 @export var min_dim: int = 5
 
+@export_category("Geometry Generator")
+## Geometry generation config
+@export var wall_thickness: float = 1
+
 var min_room_size: int = min_dim * min_dim
 
-var rects: Array[Vector4i] = []
+enum Direction {LEFT, RIGHT}
 
 class BSPNode:
+	var axis: int
 	var min_dims: Vector2i
 	var max_dims: Vector2i
 	var left: BSPNode
 	var right: BSPNode
 	
-	func _init(p_min_dims: Vector2i, p_max_dims: Vector2i, p_left: BSPNode, p_right: BSPNode):
+	func _init(p_axis: int, p_min_dims: Vector2i, p_max_dims: Vector2i, p_left: BSPNode, p_right: BSPNode):
+		axis = p_axis
 		min_dims = p_min_dims
 		max_dims = p_max_dims
 		left = p_left
@@ -22,24 +29,19 @@ class BSPNode:
 
 func generate_level(axis: int, min_space: Vector2i, max_space: Vector2i, depth: int = 0) -> BSPNode:
 	var dims = max_space - min_space
-	if dims[axis] / 2 < min_dim:
-		#rects.append(Vector4i(min_space.x, min_space.y, max_space.x, max_space.y))
-		return null
-	
 	var new_axis = (axis + 1) % 2
 	# 10% we stop here and just create a big room
 	if (depth > 2 and randi_range(0, 9) == 0) \
 	or dims.x * dims.y <= min_dim * min_dim \
 	or dims[new_axis] / 2 < min_dim:
-		rects.append(Vector4i(min_space.x, min_space.y, max_space.x, max_space.y))
-		return BSPNode.new(min_space, max_space, null, null)
+		return BSPNode.new(new_axis, min_space, max_space, null, null)
 		
 	# Calculate min and max ranges so that a split 
 	# doesn't create a room that violates min dimensions
 	var min_value = min_space[axis] + min_dim
 	var max_value = max_space[axis] - min_dim
 	var split = randi_range(min_value, max_value)
-	print("Spliting axis ", axis, " at ", split)
+	#print("Spliting axis ", axis, " at ", split)
 	
 	var left_min_space = min_space
 	var left_max_space = max_space
@@ -51,28 +53,63 @@ func generate_level(axis: int, min_space: Vector2i, max_space: Vector2i, depth:
 	var right_max_space = max_space
 	var right = generate_level(new_axis, right_min_space, right_max_space, depth + 1)
 	
-	assert((left == null and right == null) or (left != null and right != null))
+	return BSPNode.new(axis, min_space, max_space, left, right)
 	
-	if left == null and right == null:
-		rects.append(Vector4i(min_space.x, min_space.y, max_space.x, max_space.y))
+func is_leaf(node: BSPNode) -> bool:
+	return node.left == null and node.right == null
 	
-	return BSPNode.new(min_space, max_space, left, right)
+func get_children_on_axis(node: BSPNode, axis: int, value: int) -> Array[BSPNode]:
+	if is_leaf(node):
+		if node.min_dims[axis] == value or node.max_dims[axis] == value:
+			return [node]
+		else:
+			return []
+	else:
+		return get_children_on_axis(node.left, axis, value) + get_children_on_axis(node.right, axis, value)
+
+func generate_doors(node: BSPNode):
+	var left_children = get_children_on_axis(node.left, node.axis, node.left.max_dims[node.axis])
+	var right_children = get_children_on_axis(node.right, node.axis, node.right.min_dims[node.axis])
+	
+	print(left_children)
+	print(right_children)
+	
+func generate_geo(map: BSPNode):
+	# TODO figure out where to place walls
+	if map.left == null and map.right == null:
+		var box = CSGBox3D.new()
+		var p1 = Vector3(map.min_dims.x + wall_thickness/2, 0, map.min_dims.y + wall_thickness/2)
+		var p2 = Vector3(map.max_dims.x - wall_thickness/2, 0.1, map.max_dims.y - wall_thickness/2)
+		box.size = p2 - p1
+		var pos_p1 = Vector3(map.min_dims.x, 0, map.min_dims.y)
+		var pos_p2 = Vector3(map.max_dims.x, 0, map.max_dims.y)
+		var offset = (pos_p2 - pos_p1) / 2
+		box.position = p1 + offset - Vector3(0, 1, 0)
+		add_child(box)
+	else:
+		generate_geo(map.left)
+		generate_geo(map.right)
+		
+		# Generate the wall between the two
+		var wall = CSGBox3D.new()
+		var axis = 0 if map.axis == 0 else 2
+		var other_axis = 2 if axis == 0 else 0
+		var max_dim = Vector3(map.max_dims.x, 0, map.max_dims.y)
+		var min_dim = Vector3(map.min_dims.x, 0, map.min_dims.y)
+		wall.size[map.axis] = wall_thickness
+		wall.size[other_axis] = max_dim[other_axis] - min_dim[other_axis]
+		wall.size[1] = 2
+		
+		var pos2d = map.left.max_dims
+		var pos3d = Vector3(pos2d.x, 0, pos2d.y)
+		wall.position = pos3d - (wall.size/2) + Vector3(1, 1, 1)
+		add_child(wall)
+		
 
 func _ready() -> void:
 	var starting_axis = randi_range(0, 1)
 	var min_space = Vector2i(0, 0)
 	var max_space = Vector2i(width, height)
 	var map = generate_level(starting_axis, min_space, max_space)
-	
-func _draw():
-	var mult = 1
-	for rect in rects:
-		var pos1 = 5*Vector2i(rect.x, rect.y)
-		var pos2 = 5*Vector2i(rect.z, rect.w)
-		var dims = pos2 - pos1
-		draw_rect(Rect2(pos1, dims), mult*Color(0.01, 0.01, 0.01))
-		draw_line(pos1, Vector2i(pos1.x, pos2.y), Color(0, 1, 0))
-		draw_line(Vector2i(pos1.x, pos2.y), pos2, Color(0, 1, 0))
-		draw_line(pos2, Vector2i(pos2.x, pos1.y), Color(0, 1, 0))
-		draw_line(Vector2i(pos2.x, pos1.y), pos1, Color(0, 1, 0))
-		mult += 2
+	generate_doors(map)
+	generate_geo(map)