CesiumGeometry::BoundingSphere Class Reference

A bounding sphere with a center and a radius. More...

#include <CesiumGeometry/BoundingSphere.h>

Public Member Functions
constexpr	BoundingSphere (const glm::dvec3 &center, double radius) noexcept
	Construct a new instance.
constexpr const glm::dvec3 &	getCenter () const noexcept
	Gets the center of the bounding sphere.
constexpr double	getRadius () const noexcept
	Gets the radius of the bounding sphere.
CullingResult	intersectPlane (const Plane &plane) const noexcept
	Determines on which side of a plane this boundings sphere is located.
double	computeDistanceSquaredToPosition (const glm::dvec3 &position) const noexcept
	Computes the distance squared from a position to the closest point on this bounding sphere. Returns 0 if the point is inside the sphere.
bool	contains (const glm::dvec3 &position) const noexcept
	Computes whether the given position is contained within the bounding sphere.
BoundingSphere	transform (const glm::dmat4 &transformation) const noexcept
	Transforms this bounding sphere to another coordinate system using a 4x4 matrix.

Detailed Description

A bounding sphere with a center and a radius.

Definition at line 16 of file BoundingSphere.h.

Constructor & Destructor Documentation

BoundingSphere()

CesiumGeometry::BoundingSphere::BoundingSphere ( const glm::dvec3 & center, double radius )

inlineconstexprnoexcept

Construct a new instance.

Parameters

center	The center of the bounding sphere.
radius	The radius of the bounding sphere.

Definition at line 24 of file BoundingSphere.h.

Member Function Documentation

computeDistanceSquaredToPosition()

double CesiumGeometry::BoundingSphere::computeDistanceSquaredToPosition ( const glm::dvec3 & position ) const

noexcept

Computes the distance squared from a position to the closest point on this bounding sphere. Returns 0 if the point is inside the sphere.

Parameters

position

The position.

Returns

The distance squared from the position to the closest point on this bounding sphere.

  // Sort bounding spheres from back to front
  glm::dvec3 cameraPosition = anyOldCameraPosition();
  std::vector<BoundingSphere> spheres = anyOldSphereArray();
  std::sort(
      spheres.begin(),
      spheres.end(),
      [&cameraPosition](auto& a, auto& b) {
        return a.computeDistanceSquaredToPosition(cameraPosition) >
               b.computeDistanceSquaredToPosition(cameraPosition);
      });

contains()

bool CesiumGeometry::BoundingSphere::contains ( const glm::dvec3 & position ) const

noexcept

Computes whether the given position is contained within the bounding sphere.

Parameters

position

The position.

Returns

Whether the position is contained within the bounding sphere.

getCenter()

const glm::dvec3 & CesiumGeometry::BoundingSphere::getCenter ( ) const

inlineconstexprnoexcept

Gets the center of the bounding sphere.

Definition at line 30 of file BoundingSphere.h.

getRadius()

double CesiumGeometry::BoundingSphere::getRadius ( ) const

inlineconstexprnoexcept

Gets the radius of the bounding sphere.

Definition at line 37 of file BoundingSphere.h.

intersectPlane()

CullingResult CesiumGeometry::BoundingSphere::intersectPlane ( const Plane & plane ) const

noexcept

Determines on which side of a plane this boundings sphere is located.

Parameters

plane

The plane to test against.

Returns

• CullingResult::Inside if the entire sphere is on the side of the plane the normal is pointing.
• CullingResult::Outside if the entire sphere is on the opposite side.
• CullingResult::Intersecting if the sphere intersects the plane.

transform()

BoundingSphere CesiumGeometry::BoundingSphere::transform ( const glm::dmat4 & transformation ) const

noexcept

Transforms this bounding sphere to another coordinate system using a 4x4 matrix.

If the transformation has non-uniform scale, the bounding sphere's radius is scaled by the largest scale value among the transformation's axes.

Parameters

transformation

The transformation.

Returns

The bounding sphere in the new coordinate system.

---

The documentation for this class was generated from the following file:

• /home/runner/work/cesium-native/cesium-native/CesiumGeometry/include/CesiumGeometry/BoundingSphere.h