Sphere

A bounding sphere defined by a center point and radius.

Useful for fast intersection tests, frustum culling, and spatial bounds.

Properties

center Vector3

Vector3 center { Vector3::Zero() }

Center of the sphere in 3D space.

radius float

float radius { -1.0f }

Radius of the sphere. A negative value indicates an empty sphere.

Functions

ApplyTransform() auto

auto vglx::Sphere::ApplyTransform(const Matrix4 &transform)

Parameter	Description
transform	4x4 matrix to apply to the sphere.

Transforms the sphere by the given matrix. The center is transformed directly, and the radius is scaled by the maximum scale component of the matrix.

ExpandWithPoint() auto

auto vglx::Sphere::ExpandWithPoint(const Vector3 &p)

Parameter	Description
p	Point to include in the sphere.

Expands the sphere to include a given point. If the sphere is empty, it is initialized with the point. Otherwise, the sphere expands just enough to include the point.

IsEmpty() auto

auto vglx::Sphere::IsEmpty() const

Checks if the sphere is empty. An empty sphere is defined by a negative radius.

Radius() auto

auto vglx::Sphere::Radius() const

Returns the current radius of the sphere.

Reset() auto

auto vglx::Sphere::Reset()

Resets the sphere to an empty state. Sets the center to (0, 0, 0) and the radius to -1.

Sphere() constexpr

vglx::Sphere::Sphere(const Vector3 center, float radius)

Parameter	Description
center	Center position.
radius	Radius.

Constructs a Sphere from a center and a radius.

Translate() auto

auto vglx::Sphere::Translate(const Vector3 &translation)

Parameter	Description
translation	Vector to translate by.

Translates the sphere by a constant vector.

Union() auto

auto vglx::Sphere::Union(const Sphere &other)

Parameter	Description
other	The sphere to merge into this one.

Expands this sphere to fully contain another sphere.