//! Intersect with a sphere, returning true if there is an intersection.
bool intersect(const sphere<Type>& s) const
{
const Type d1 = (s.getCenter() - m_center).sqrLength();
const Type d2 = m_radius + s.getRadius();
return (d1 < d2 * d2);
}
sphere sphere::operator +(const sphere& other) const
{
glm::vec4 center = (c + other.getCenter()) * 0.5f;
float radius = glm::distance(c, center) + glm::max(r, other.getRadius());
return sphere(center, radius);
}
//! Extend the boundaries of the sphere by the given sphere.
void extendBy(const sphere<Type>& sphere)
{
if (intersect(sphere))
return;
const vec3<Type> dir = (m_center - sphere.getCenter()).normalized();
const vec3<Type> p1 = m_center + m_radius * dir;
const vec3<Type> p2 = sphere.getCenter() - sphere.getRadius() * dir;
setPoles(p1, p2);
}
VkBool32 frustum::isVisible(const sphere& sphereWorld) const
{
float distance;
for (auto& currentSide : sidesWorld)
{
distance = currentSide.distance(sphereWorld.getCenter());
if (distance + sphereWorld.getRadius() < 0.0f)
{
return VK_FALSE;
}
}
return VK_TRUE;
}
float sphere::distance(const sphere& sphere) const
{
return glm::abs(glm::distance(c, sphere.getCenter())) - r - sphere.getRadius();
}
sphere operator *(const glm::mat4& transform, const sphere& s)
{
return sphere(transform * s.getCenter(), s.getRadius());
}
