public override void Update()
{
base.Update();
if(isEmitting)
{
for (int i = 0; i < emitAmount; i++)
{
// Create a particle!
Particle newParticle = new Particle(this.X, this.Y, imageSource, imageWidth, imageHeight);
newParticle.LifeSpan = particleLifetime;
// Figure out the final X and Y positions of this particle
// Based on angle, distance jitter etc
float thisAngle = this.emitAngle + (Rand.Float(-emitAngleJitter, emitAngleJitter));
float thisDistance = this.emitDistance + (Rand.Float(-emitDistanceJitter, emitDistanceJitter));
thisAngle = thisAngle * ((float)Math.PI / 180.0f);
newParticle.FinalX = this.X + (float)Math.Sin(thisAngle) * thisDistance;
newParticle.FinalY = this.Y + (float)Math.Cos(thisAngle) * thisDistance;
if(particleMovementInverted) // Move from outside inwards
{
// Can't pass properties by reference in C#
float finalX = newParticle.FinalX;
float finalY = newParticle.FinalY;
Utilities.Swap(ref finalX, ref this.X);
Utilities.Swap(ref finalY, ref this.Y);
newParticle.FinalX = finalX;
newParticle.FinalY = finalY;
}
newParticle.ScaleX = particleStartScale;
newParticle.ScaleY = particleStartScale;
newParticle.FinalScaleX = particleEndScale;
newParticle.FinalScaleY = particleEndScale;
newParticle.Color = beginColour;
newParticle.FinalColor = endColour;
newParticle.Alpha = beginColour.A;
newParticle.FinalAlpha = endColour.A;
newParticle.Angle = particleStartRotation;
newParticle.FinalAngle = particleEndRotation;
newParticle.Animate = particlesAnimated;
newParticle.FrameCount = numParticleFrames;
newParticle.FrameOffset = Rand.Int(0, numParticleFrames - 1);
newParticle.Loops = particleAnimLoops;
// Draw particles on top of all but the HUD
newParticle.Layer = 7;
newParticle.CenterOrigin = true;
newParticle.Start(); // Initialize graphics
newParticle.Graphic.Shake = particleShake;
// Add to scene if global, and to system local space if local
//if (particleLocalSpace)
// {
activeLocalParticles.Add(newParticle);
// }
this.Scene.Add(newParticle);
}
}
// If we have local particles...
if(particleLocalSpace)
{
foreach (Particle particle in activeLocalParticles)
{
// Move the particles with the parent system
particle.FinalX += (X - oldX);
particle.FinalY += (Y - oldY);
particle.Angle = Angle;
}
}
// Update particle system's old position
oldX = X;
oldY = Y;
}
