/// <summary>
/// 更新粒子物理属性，如果粒子超过边界，将其回收
/// </summary>
/// <param name="elapsedTime"></param>
/// <param name="size"></param>
public void Update(float elapsedTime, Vector2 size)
{
{
if (surfaceLoaded)
{
for (int i = ActiveParticles.Count - 1; i >= 0; i--)
{
var p = ActiveParticles[i];
if (p == null)
{
ActiveParticles.RemoveAt(i);
return;
}
if (p.Position.X > 0 - size.Y * (float)Math.Tan(1.5708 - (minRotationAngle + maxRotationAngle) / 2) && p.Position.X <= size.X && p.Position.Y <= size.Y)
{
p.Update(elapsedTime);
}
else
{
ActiveParticles.RemoveAt(i);
FreeParticles.Push(p);
}
}
}
}
}
public override void AddParticles(Vector2 size)
{
if (surfaceLoaded)
{
if (!inited)
{
InitSmoke(size);
}
// 添加的数量
var m = (int)(size.X * minDensity);
var n = (int)(size.X * maxDensity);
var actualAdd = Tools.Random.Next(m, n) - ActiveParticles.Count;
if (actualAdd < 0)
{
actualAdd = 0;
}
// 激活这些粒子
for (int i = 0; i < actualAdd; i++)
{
// 从空闲粒子堆里取粒子，如果没有，那么就 new 一个
Particle particle = (FreeParticles.Count > 0) ? FreeParticles.Pop() : new Particle();
particle.Key = Tools.Random.Next(0, smokeSurfaceName[flag].Length);
var where = new Vector2(0 - (float)(surfacesBounds[particle.Key].Width / 2), Tools.RandomBetween(0 - (float)(surfacesBounds[particle.Key].Height / 2), size.Y / 5 - (float)(surfacesBounds[particle.Key].Height / 2)));
// 初始化粒子参数
InitializeParticle(particle, where);
// 将此粒子加入激活粒子队列
if (ActiveParticles.Capacity <= ActiveParticles.Count)
{
ActiveParticles.Capacity = ActiveParticles.Count * 2;
}
ActiveParticles.Add(particle);
}
}
}
internal void ImmersiveOut()
{
inited = false;
for (int i = ActiveParticles.Count - 1; i >= 0; i--)
{
var p = ActiveParticles[i];
ActiveParticles.RemoveAt(i);
FreeParticles.Push(p);
}
isImmersive = false;
}
/// <summary>
/// 获得画布尺寸，在画布顶部生成粒子
/// </summary>
/// <param name="size"></param>
public void AddRainDrop(Vector2 size)
{
{
if (surfaceLoaded)
{
numParticles += (Tools.RandomBetween(minDensity, maxDensity) * size.X);
var actualAdd = (int)numParticles;
numParticles %= 1;
for (int i = 0; i < actualAdd; i++)
{
Particle particle = (FreeParticles.Count > 0) ? FreeParticles.Pop() : new Particle();
float x = Tools.RandomBetween(0 - size.Y * (float)Math.Tan(1.5708 - (minRotationAngle + maxRotationAngle) / 2), size.X);
InitializeParticle(particle, new Vector2(x, -5));
if (ActiveParticles.Capacity <= ActiveParticles.Count)
{
ActiveParticles.Capacity = ActiveParticles.Count * 2;
}
ActiveParticles.Add(particle);
}
}
}
}
/// <summary>
/// 更新粒子物理属性，如果粒子超过边界，将其回收
/// </summary>
/// <param name="elapsedTime"></param>
/// <param name="size"></param>
public void Update(float elapsedTime, Vector2 size)
{
if (surfaceLoaded)
{
for (int i = ActiveParticles.Count - 1; i >= 0; i--)
{
var p = ActiveParticles[i];
if (p == null)
{
ActiveParticles.RemoveAt(i);
return;
}
if (p.Position.X < (size.X + (surfacesBounds[p.Key].Width) / 2))
{
p.Update(elapsedTime);
}
else
{
ActiveParticles.RemoveAt(i);
FreeParticles.Push(p);
}
}
}
}
private void InitSmoke(Vector2 size)
{
var m = (int)(size.X * minDensity);
var n = (int)(size.X * maxDensity);
var add = Tools.Random.Next(m, n);
for (int i = 0; i < add; i++)
{
// 从空闲粒子堆里取粒子，如果没有，那么就 new 一个
Particle particle = (FreeParticles.Count > 0) ? FreeParticles.Pop() : new Particle();
particle.Key = Tools.Random.Next(0, smokeSurfaceName[flag].Length);
var where = new Vector2(Tools.RandomBetween(0 - (float)(surfacesBounds[particle.Key].Width / 2), size.X + (float)(surfacesBounds[particle.Key].Width / 2)), Tools.RandomBetween((0 - (float)(surfacesBounds[particle.Key].Height / 2)), size.Y / 5 - (float)(surfacesBounds[particle.Key].Height / 2)));
// 初始化粒子参数
InitializeParticle(particle, where);
// 将此粒子加入激活粒子队列
if (ActiveParticles.Capacity <= ActiveParticles.Count)
{
ActiveParticles.Capacity = ActiveParticles.Count * 2;
}
ActiveParticles.Add(particle);
}
inited = true;
}
