Method BoundingSphere

geometry/geometry.go:336–357

BoundingSphere computes the bounding sphere of this geometry if necessary and returns its value.

()

// BoundingSphere computes the bounding sphere of this geometry
// if necessary and returns its value.
func (g *Geometry) BoundingSphere() math32.Sphere {

	// If valid, return its value
	if g.boundingSphereValid {
		return g.boundingSphere
	}

	// Reset radius, calculate bounding box and copy center
	g.boundingSphere.Radius = float32(0)
	box := g.BoundingBox()
	box.Center(&g.boundingSphere.Center)

	// Find the radius of the bounding sphere
	maxRadiusSq := float32(0)
	g.ReadVertices(func(vertex math32.Vector3) bool {
		maxRadiusSq = math32.Max(maxRadiusSq, g.boundingSphere.Center.DistanceToSquared(&vertex))
		return false
	})
	g.boundingSphere.Radius = float32(math32.Sqrt(maxRadiusSq))
	g.boundingSphereValid = true
	return g.boundingSphere
}

// Area returns the surface area.
// NOTE: This only works for triangle-based meshes.