public void Splode(Vector2 origin, int radius = 20)
{
if (drawer == null)
{
Init();
}
///https://blog.csdn.net/u010141928/article/details/79514514 算法参考该博客
///Start....
Rect r = new Rect(origin.x - radius, origin.y - radius, radius * 2, radius * 2);
int radSqr = radius * radius; //没有Π的圆的面积
int yMin = (int)r.yMin, yMax = (int)r.yMax, xMin = (int)r.xMin, xMax = (int)r.xMax, x = (int)origin.x, y = (int)origin.y;
for (int j = yMin; j < yMax; j++)
{
for (int i = xMin; i < xMax; i++)
{
//i,j为当前位置
int dSqr = (i - x) * (i - x) + (j - y) * (j - y); //平面解析几何，操
if (dSqr > radSqr) //越过这个圆的边界了
{
continue;
}
drawer.ClearLivePixels(i, j); //把这个区域可能存在的活着的对象杀了
if (UnityEngine.Random.Range(0, 1f) > .4f) //有可能可以产生爆炸溅射效果 ，见下面代码。。
{
continue;
}
Color c = drawer.GetPixel(i, j); //获取这个位置的背景色
if (c.a == 0) //没有东西？那溜了溜了
{
continue;
}
//这是一个爆炸溅射物
//万物都是由沙子组成的。。
pos.Set(i, j);
Dross dross = drawer.CreateLivePixel <Dross>(pos, brush);
dross.velocity = (dross.position - origin) * 7f; //原点坐标指向粒子位置的方向 射出去
}
}
drawer.FillEllipse(r, Color.clear);
}
public override void Update(DrawerController drawer)
{
//调整位置和粒子的颜色
position.y += bouyancy * Time.deltaTime;
//判断粒子当前的“年龄”，毕竟各个阶段的火焰颜色不同嘛
float t = (Time.time - startTime) / lifeTime;
//根据他的年龄，给他上色
color = Color.Lerp(MakeFireInInspector.instance.fireStartColor, MakeFireInInspector.instance.fireEndColor, t);
if (t > 1)
{
DieClear(); //大限已到，节哀
}
//时不时生一个活的火焰
if (UnityEngine.Random.Range(0, 100) < 10)
{
pos.Set(x, y - 1);
drawer.CreateLivePixel <Fire>(pos, brush).startTime = startTime - .3f;
}
//如果碰到了木头，那就把他烧成灰烬人(生点余烬粒子)，还有足够时间的着火才有几率点燃噢
Color c = drawer.GetPixel(x, y, false);
if (MakeFireInInspector.instance.IsFlammable(c) && UnityEngine.Random.Range(0, 100) < 2)
{
pos.Set(x, y);
drawer.CreateLivePixel <Ember>(pos, attach);
}
//如果碰到雪了。。
if (c.IsGrayscale())
{
drawer.SetPixel(x, y, Color.clear);
}
//碰到雨了
if (c.IsBluescale())
{
drawer.SetPixel(x, y, Color.clear);
}
}
bool Dieposition(DrawerController drawer, int x, int y)
{
Color cs = drawer.GetPixel(x, y);
return(cs == color);
}
bool ClearAt(DrawerController drawer, int x, int y)
{
Color cs = drawer.GetPixel(x, y);
return(cs == Color.black || cs.a == 0);
}
public override void Start(DrawerController drawer)
{
color = drawer.GetPixel(x, y);
}