private static _Collision BoxToSphereCollision(_ColliderBox box, _ColliderSphere sphere, bool boxMe)
{
/**
* Se utiliza Inverse Transform para transformar todas las posiciones y
* direcciones a un sistema de coordenadas local donde es más sencillo
* calcular los choques en una dimensión
*/
Vector3 bPos = box.Transform.position;
Vector3 sPos = InverseTransformPointUnscaled(box.Transform, sphere.Transform.position);
// Si no está fuera de un borde con el cual chequear significa que está adentro, por lo que
// esa coordenada no se utilizará para el calculo.
Vector3 testPoint = sPos;
if (sPos.x < -box.BoxSize.x / 2)
{
testPoint.x = -box.BoxSize.x / 2;
}
else if (sPos.x > box.BoxSize.x / 2)
{
testPoint.x = box.BoxSize.x / 2;
}
if (sPos.y < -box.BoxSize.y / 2)
{
testPoint.y = -box.BoxSize.y / 2;
}
else if (sPos.y > box.BoxSize.y / 2)
{
testPoint.y = box.BoxSize.y / 2;
}
if (sPos.z < -box.BoxSize.z / 2)
{
testPoint.z = -box.BoxSize.z / 2;
}
else if (sPos.z > box.BoxSize.z / 2)
{
testPoint.z = box.BoxSize.z / 2;
}
float distance = (sPos - testPoint).magnitude;
if (distance <= sphere.Radius)
{
Vector3 extentPointBox = testPoint;
Vector3 extentPointSphere = sPos + (testPoint - sPos).normalized * sphere.Extent;
Vector3 collisionPoint = TransformPointUnscaled(box.Transform, (extentPointBox + extentPointSphere) / 2);
Vector3 normalUnit = box.Transform.TransformDirection(sPos - testPoint).normalized;
return(new _Collision(collisionPoint, (extentPointBox - extentPointSphere).magnitude, normalUnit, boxMe ? (_Collider)sphere : (_Collider)box));
}
else
{
return(null);
}
}
public static _Collision SphereToBoxCollision(_ColliderSphere me, _ColliderBox other)
{
return(BoxToSphereCollision(other, me, false));
}
public static _Collision BoxToSphereCollision(_ColliderBox me, _ColliderSphere other)
{
return(BoxToSphereCollision(me, other, true));
}
