public void Execute(Entity entity, int index, ref Joiner_C joiner)
{
//添加移动组件(mover会记录实体信息，AddComponent会覆盖原有组件,所以只能给没有mover的实体单独添加)
Mover_C mover = new Mover_C();
concurrent.AddComponent(index, entity, mover);
}
public void InitScene(EntityManager manager, ChunckConfig config)
{
var random = new Unity.Mathematics.Random((uint)System.DateTime.Now.Millisecond);
for (int i = 0; i < config.count; i++)
{
var position = random.NextFloat3(config.center - config.size, config.center + config.size);
var volume = random.NextFloat(config.volumeRange.start, config.volumeRange.start + config.volumeRange.length);
var speed = random.NextFloat3(config.minSpeed, config.maxSpeed);
var entity = manager.Instantiate(config.entity);
Joiner_C joiner = new Joiner_C()
{
Volume = volume
};
Mover_C mover = new Mover_C()
{
direction = speed
};
Translation translation = new Translation()
{
Value = position
};
manager.AddComponentData(entity, joiner);
manager.AddComponentData(entity, mover);
manager.AddComponentData(entity, translation);
}
}
[ReadOnly] public NativeArray <MassPoint_C> masses; //接受者质量组件
public void Execute(int index)
{
if (toArr[index].Equals(Entity.Null))
{
return;
}
var momentum = MomentumArr[index];
double3 direction = 0;
//如果mass为0 代表增加单纯的动量(质量不变)
if (momentum.mass == 0)
{
double3 speed = movers[index].direction * masses[index].Mass + momentum.speed;
direction = speed / masses[index].Mass;
}
else
{
double3 speed = movers[index].direction * masses[index].Mass + momentum.mass * momentum.speed;
direction = speed / (masses[index].Mass + momentum.mass);
}
Mover_C mover = new Mover_C()
{
direction = direction
};
movers[index] = mover;
}
public void Execute(int index)
{
Entity entity = entities[index];
Joiner_C joiner = joiners[index];
Translation translation = translations[index];
Mover_C mover = movers[index];
NonUniformScale scale = scales[index];
// 增加的体积
double addVolume = 0;
// 增加的质量
double addMass = 0;
// 增加的动量
double3 addMomentum = double3.zero;
for (int i = 0; i < joiners.Length; i++)
{
if (i == index)
{
continue;
}
var joiner2 = joiners[i];
if (joiner.Volume <= 0 || joiner2.Volume <= 0)
{
continue;
}
if (joiner2.Range == joiner.Range && entity.Index > entities[i].Index)
{
continue;
}
var translation2 = translations[i];
var dis = math.distance(translation.Value, translation2.Value);
if (dis == 0)
{
continue;
}
if (joiner.Range + joiner2.Range > dis)
{
//如果被吸收则减少当前体积，如果吸收则增加对方的体积
bool isOut = joiner2.Range > joiner.Range;
double v = isOut ? joiner.Volume : joiner2.Volume;
//最少吸收每秒吸收1体积
if (v > 0.2)
{
v = math.max(0.2, v * deltaTime * 2);
}
if (!isOut)
{
var m = UnitHelper.Volume2Mass(v);
addMass += m;
addMomentum += m * movers[i].direction;
}
addVolume += isOut ? -v : v;
}
}
joiner.Volume += addVolume;
//根据物质量显示物体
if (joiner.Volume < 0.01)
{
concurrent.DestroyEntity(index, entity);
return;
}
if (addVolume > 0)
{
//添加动量
Momentum_C momentumIn = new Momentum_C();
momentumIn.mass = addMass * 0.1;
momentumIn.speed = addMomentum / (addMass + 1);
momentumIn.target = entity;
concurrent.AddComponent(index, concurrent.CreateEntity(index), momentumIn);
}
scale.Value = (float3)(new double3(1, 1, 1) * 2 * joiner.Range);
concurrent.SetComponent(index, entity, scale);
concurrent.SetComponent(index, entity, joiner);
}
