BoundingBox

BoundingBox — Aspose.3D FOSS for Python API Reference

Overview

BoundingBox is an axis-aligned bounding box (AABB) defined by two Vector3 corners: minimum (lowest x, y, z) and maximum (highest x, y, z). It is used for spatial queries such as point-in-box tests, frustum culling helpers, and scene-level size estimation.

A BoundingBox can be in a null (empty/uninitialised) state when created with no arguments. Calling merge() on a null box initialises it from the first point or box provided.

Package: aspose.threed.utilities

from aspose.threed.utilities import BoundingBox, Vector3

Constructor

Signature	Description
`BoundingBox()`	Null (empty) bounding box
`BoundingBox(minimum, maximum)`	Constructs from two `Vector3` corners
`BoundingBox(min_x, min_y, min_z, max_x, max_y, max_z)`	Constructs from six scalar values

Properties

Name	Type	Description
`minimum`	`Vector3`	The corner with the smallest x, y, z values. Returns `(+inf, +inf, +inf)` for a null box
`maximum`	`Vector3`	The corner with the largest x, y, z values. Returns `(-inf, -inf, -inf)` for a null box
`center`	`Vector3`	Midpoint between `minimum` and `maximum`; `(0,0,0)` for a null box
`size`	`Vector3`	Extent per axis (`maximum - minimum`); `(0,0,0)` for a null box

Static Factory Methods

Method	Return Type	Description
`BoundingBox.get_null()`	`BoundingBox`	Returns a null (empty) bounding box
`BoundingBox.get_infinite()`	`BoundingBox`	Returns an infinite bounding box spanning all of space

Instance Methods

Method	Return Type	Description
`merge(point)`	`None`	Expands the box to include a `Vector3`, `Vector4`, or another `BoundingBox`
`merge(x, y, z)`	`None`	Expands the box to include the point `(x, y, z)`
`contains(point)`	`bool`	Returns `True` if the `Vector3` point is inside or on the boundary
`contains(box)`	`bool`	Returns `True` if `box` is entirely within this box
`overlaps_with(box)`	`bool`	Returns `True` if the two boxes intersect
`scale()`	`float`	Returns the largest absolute coordinate value — useful as a rough scene scale estimate

Example

from aspose.threed.utilities import BoundingBox, Vector3

# Build a bounding box from a list of points
bb = BoundingBox()
points = [
    Vector3(0.0, 0.0, 0.0),
    Vector3(1.0, 2.0, 3.0),
    Vector3(-1.0, 0.5, 1.5),
]
for p in points:
    bb.merge(p)

print(bb.minimum)   # Vector3(-1.0, 0.0, 0.0)
print(bb.maximum)   # Vector3(1.0, 2.0, 3.0)
print(bb.center)    # Vector3(0.0, 1.0, 1.5)
print(bb.size)      # Vector3(2.0, 2.0, 3.0)

# Point containment
print(bb.contains(Vector3(0.5, 1.0, 1.5)))   # True
print(bb.contains(Vector3(5.0, 0.0, 0.0)))   # False

# Box containment
inner = BoundingBox(Vector3(0, 0, 0), Vector3(0.5, 0.5, 0.5))
print(bb.contains(inner))   # True

# Overlap test
other = BoundingBox(Vector3(0.5, 0.5, 0.5), Vector3(2.0, 2.0, 2.0))
print(bb.overlaps_with(other))   # True

# Retrieve from a node
from aspose.threed import Scene
from aspose.threed.entities import Mesh
from aspose.threed.utilities import Vector4

scene = Scene()
mesh = Mesh()
mesh.control_points.append(Vector4(-1, 0, 0, 1))
mesh.control_points.append(Vector4( 1, 0, 0, 1))
mesh.control_points.append(Vector4( 0, 1, 0, 1))
mesh.create_polygon(0, 1, 2)
node = scene.root_node.create_child_node("tri", mesh)
node_bb = node.get_bounding_box()
print(node_bb.minimum)
print(node_bb.maximum)