private void initParticle(Particle particle)
{
var cache = RandomCaches();
particle.System = this;
particle.Position.X = (int) ( Position.X + PositionRandom.X * Random() );
particle.Position.Y = (int) ( Position.Y + PositionRandom.Y * Random() );
var newAngle = ( Angle + AngleRandom * Random() ) * ( Math.PI / 180 ); // convert to radians
var vector = new DoublePoint(Math.Cos(newAngle), Math.Sin(newAngle)); // Could move to lookup for speed
var vectorSpeed = Speed + SpeedRandom * Random();
particle.Direction = vector.Multiply(vectorSpeed);
particle.Size = cache.Size;
particle.Size = particle.Size < 0 ? 0 : ~~(int) particle.Size;
particle.TimeToLive = cache.TimeToLive;
particle.Sharpness = cache.Sharpness;
particle.Sharpness = particle.Sharpness > 100 ? 100 : particle.Sharpness < 0 ? 0 : particle.Sharpness;
// internal circle gradient size - affects the sharpness of the radial gradient
particle.SizeSmall = (int) ( ( particle.Size / 200 ) * particle.Sharpness ); //(size/2/100)
double[] start = cache.Start;
double[] end = cache.End;
particle.Color = start;
particle.DeltaColor[0] = ( end[0] - start[0] ) / particle.TimeToLive;
particle.DeltaColor[1] = ( end[1] - start[1] ) / particle.TimeToLive;
particle.DeltaColor[2] = ( end[2] - start[2] ) / particle.TimeToLive;
particle.DeltaColor[3] = ( end[3] - start[3] ) / particle.TimeToLive;
particle.BuildCache(1, cache);
if (Game.DebugText[1].Falsey())
Game.DebugText[1] = 0;
Game.DebugText[1] = (int) Game.DebugText[1] + 1;
}
private object obtainGradient(CanvasContext2D context, Particle particle)
{
var halfSize = (int) particle.Size >> 1;
/* string key = halfSize + particle.DrawColor + particle.SizeSmall;
if (grads.ContainsKey(key)) {
return grads[key];
}*/
if (Game.DRAWFAST)
return particle.DrawColor;
var radgrad = context.CreateRadialGradient(halfSize, halfSize, particle.SizeSmall, halfSize, halfSize, halfSize);
//var radgrad = context.CreateLinearGradient(halfSize, halfSize, particle.SizeSmall, halfSize);
radgrad.AddColorStop(0, particle.DrawColor);
radgrad.AddColorStop(1, particle.DrawColorTransparent); //Super cool if you change these values (and add more Color stops)
return /*grads[key]=*/ radgrad;
}
public Particle AddParticle()
{
if (Particles.Count == MaxParticles) return null;
if (tick++ % curRand == 0) {
caches[(int) ( ( caches.Count - 1 ) * Math.Random() )] = newCache();
curRand = (int) ( Math.Random() * 100 );
}
// Take the next particle out of the particle pool we have created and initialize it
var particle = new Particle();
initParticle(particle);
Particles.Add(particle);
// Increment the particle count
return particle;
}
