OBB

Functions for Oriented Bounding Boxes (OBB). An OBB is represented by a 15-element array containing its center, half-extents, and a 3x3 rotation matrix.

Array Layout

The array is structured as follows:

• [0-2]: Center (X, Y, Z)
• [3-5]: Half-extents
• [6-14]: 3x3 Rotation matrix (Column-Major)

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Creation and Setting

Function	Description
obb_create(center?, halfSize?, rotation?)	Creates a new OBB array.
obb_set(obb, center, halfSize, rotation)	Sets the OBB components.
obb_copy(obb, src)	Copies values from another OBB.
obb_clone(obb)	Clones the OBB.
obb_from_box3(obb, box3)	Sets OBB from an AABB.

Getters and Comparison

Function	Description
obb_get_center(obb, out?)	Gets the center of the OBB.
obb_get_half_size(obb, out?)	Gets the half-size of the OBB.
obb_get_rotation(obb, out?)	Gets the rotation matrix of the OBB.
obb_equals(obb1, obb2)	Checks if two OBBs are equal.

Transformations

Function	Description
obb_apply_matrix4(obb, mat4)	Transforms the OBB by a 4x4 matrix.

Collisions and Intersections

Function	Returns	Description
obb_contains_point(obb, point)	bool	Checks if the OBB contains a point.
obb_clamp_point(obb, point, out?)	vec3	Clamps a point to the OBB.
obb_intersects_sphere(obb, sphere)	bool	Checks if OBB intersects a sphere.
obb_intersects_box3(obb, box3)	bool	Checks if OBB intersects an AABB.
obb_intersects_plane(obb, plane)	bool	Checks if OBB intersects a plane.
obb_intersects_obb(obb1, obb2)	bool	Checks if two OBBs intersect using SAT.
obb_intersect_ray(obb, ray, out?)	real?	Checks if ray intersects OBB. Returns t or undefined.

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Temporary Variables

• global.UE_OBB_TEMP0
• global.UE_OBB_TEMP1
• global.UE_OBB_TEMP2