public float2 CalculateGravity(Entity entity, float2 pos, float mass)
{
float2 force = float2.zero;
float2 displ = pos - centerOfMass;
float dist = math.length(displ);
if (dist == 0)
{
dist = 0.001f;
}
if (isExternal)
{
if (objects.Count == 0 || (objects.Count == 1 && objects[0].Index == entity.Index))
{
force = float2.zero;
}
else
{
force -= displ * WorldSettings.GravityConstant * this.mass * mass / math.pow(dist, 3);
}
}
else if (math.abs(area.Width / dist) < WorldSettings.Threshold)
{
force -= displ * WorldSettings.GravityConstant * this.mass * mass / math.pow(dist, 3);
}
else
{
force += bottomLeft.CalculateGravity(entity, pos, mass);
force += bottomRight.CalculateGravity(entity, pos, mass);
force += topLeft.CalculateGravity(entity, pos, mass);
force += topRight.CalculateGravity(entity, pos, mass);
}
return(force);
}
public float2 CalculateGravity(Entity entity, float2 pos, float mass)
{
return(baseNode != null?baseNode.CalculateGravity(entity, pos, mass) : float2.zero);
}