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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
// Gravity Source Manager
// This is a component holds all the gravity sources
// and provides a simple api for physics objects to
// query and get net gravity effects.
public class CustomGravity : MonoBehaviour
{
static List<GravitySource> sources = new List<GravitySource>();
public static Vector3 GetGravity(Vector3 position, out Vector3 upAxis)
{
Vector3 g = Vector3.zero;
for(int i = 0; i < sources.Count; i++)
g += sources[i].GetGravity(position);
upAxis = -g.normalized;
return g;
}
public static Vector3 GetGravity(Vector3 position)
{
Vector3 g = Vector3.zero;
for(int i = 0; i < sources.Count; i++)
g += sources[i].GetGravity(position);
return g;
}
public static Vector3 GetUpAxis(Vector3 position)
{
return -GetGravity(position).normalized;
}
public static void Register(GravitySource source)
{
Debug.Assert(
!sources.Contains(source),
"WARNING: This source is already registered!",
source
);
sources.Add(source);
}
public static void Unregister(GravitySource source)
{
Debug.Assert(
sources.Contains(source),
"WARNING: Trying to unregister unknown gravity source!",
source
);
sources.Remove(source);
}
}
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