public void ChangeParticleSpeed(ParticleEngine.ParticleEffect p, GameTime gameTime)
{
double now = gameTime.TotalGameTime.TotalMilliseconds;
for (int i = 0; i < p.particleList.Count; i++)
{
float timeAlive = (float)(now - p.particleList[i].BirthTime);
if (!p.particleList[i].isModified)
{
p.particleList[i].Direction *= new Vector2(p.particleList[i].Scaling - 0.33f, p.particleList[i].Scaling - 0.33f);
p.particleList[i].isModified = true;
}
}
}
public void ChangeParticleStress(ParticleEngine.ParticleEffect p, GameTime gameTime)
{
double now = gameTime.TotalGameTime.TotalMilliseconds;
for (int i = 0; i < p.particleList.Count; i++)
{
float timeAlive = (float)(now - p.particleList[i].BirthTime);
if (!p.particleList[i].isModified)
{
float r = p.VectorToAngle(p.particleList[i].Direction);
r += (float)Math.PI; // add a bit to the angle for the acceleration so that the particle curves in its trajectory
if (r > Math.PI * 2) // make sure the acceleration doesn't exceed the full range of a circle
{
r -= (float)Math.PI * 2;
}
p.particleList[i].Acceleration = p.AngleToVector(r);
p.particleList[i].isModified = true;
}
if (timeAlive / p.particleList[i].Life > 0.70f) // make the particle phase out in a not so ugly way
{
p.particleList[i].ModColor = Color.Lerp(Color.DarkBlue, new Color(Color.DarkBlue, 0.0f), (timeAlive / p.particleList[i].Life));
}
}
if (sourceEmitter.Left <= bounds.Left || sourceEmitter.Right >= bounds.Right)
{
motion.X = -motion.X;
}
if (sourceEmitter.Top <= bounds.Top || sourceEmitter.Bottom >= bounds.Bottom)
{
motion.Y = -motion.Y;
}
sourceEmitter.X += (int)(motion.X * 13);
sourceEmitter.Y += (int)(motion.Y * 13);
p.Emitter = sourceEmitter;
if (isAdding)
{
p.NumberOfParticles += 10;
}
if (isSubtracting && p.NumberOfParticles > 20)
{
p.NumberOfParticles -= 10;
}
isSubtracting = false;
isAdding = false;
}
public void ChangeParticleColors(ParticleEngine.ParticleEffect p, GameTime gameTime)
{
double now = gameTime.TotalGameTime.TotalMilliseconds;
for (int i = 0; i < p.particleList.Count; i++)
{
float timeAlive = (float)(now - p.particleList[i].BirthTime);
if (timeAlive / p.particleList[i].Life < 0.85f)
{
p.particleList[i].ModColor = Color.Lerp(new Color(255, 120, 40, 255), new Color(255, 120, 40, 125), (timeAlive / p.particleList[i].Life));
}
if (timeAlive / p.particleList[i].Life >= 0.85f)
{
p.particleList[i].ModColor = Color.Lerp(new Color(255, 120, 40, 255), new Color(Color.DarkOrange, 0), (timeAlive / p.particleList[i].Life));
}
}
}