public static bool Raycast(Ray ray, Vector3 sphereCenter, float sphereRadius, SphereEpsilon epsilon = new SphereEpsilon())
{
float t;
return(Raycast(ray, out t, sphereCenter, sphereRadius, epsilon));
}
public static bool Raycast(Ray ray, out float t0, out float t1, Vector3 sphereCenter, float sphereRadius, SphereEpsilon epsilon = new SphereEpsilon())
{
t0 = t1 = 0.0f;
sphereRadius += epsilon.RadiusEps;
Vector3 sphereCenterToRayOrigin = ray.origin - sphereCenter;
float a = Vector3.SqrMagnitude(ray.direction);
float b = 2.0f * Vector3.Dot(ray.direction, sphereCenterToRayOrigin);
float c = Vector3.SqrMagnitude(sphereCenterToRayOrigin) - sphereRadius * sphereRadius;
if (MathEx.SolveQuadratic(a, b, c, out t0, out t1))
{
if (t0 < 0.0f && t1 < 0.0f)
{
return(false);
}
if (t0 > t1)
{
float temp = t0;
t0 = t1;
t1 = temp;
}
if (t0 < 0.0f)
{
t0 = t1;
}
return(true);
}
return(false);
}
public static bool ContainsPoint(Vector3 point, Vector3 sphereCenter, float sphereRadius, SphereEpsilon epsilon = new SphereEpsilon())
{
sphereRadius += epsilon.RadiusEps;
return((point - sphereCenter).sqrMagnitude <= (sphereRadius * sphereRadius));
}