public Particle()
{
Position = new Point(0, 0);
Direction = new DoublePoint(0, 0);
DeltaColor = new double[4];
Color = new double[4];
}
public ParticleSystem(int numOfCaches)
{
myNumOfCaches = numOfCaches;
MaxParticles = 150;
Particles = new List<Particle>();
Active = true;
Position = new Point(100, 100);
PositionRandom = new Point(10, 10);
Size = 45;
SizeRandom = 8;
Speed = 5;
SpeedRandom = 1.5;
LifeSpan = 9;
LifeSpanRandom = 7;
Angle = 0;
AngleRandom = 360;
Gravity = new DoublePoint(0.4, 0.2);
StartColor = new int[] {250, 218, 68, 1};
StartColorRandom = new int[] {5, 5, 5, 0};
EndColor = new int[] {245, 35, 0, 0};
EndColorRandom = new int[] {5, 5, 5, 0};
Sharpness = 40;
SharpnessRandom = 10;
MaxEmitted = -1;
ElapsedTime = 0;
Duration = -1;
EmissionRate = 0;
EmitCounter = 0;
}
public IEnumerable<Point> Travel(int stepsTotal, Point scale, bool reverse)
{
DoublePoint cur = new DoublePoint(0, 0);
DoublePoint dist = new DoublePoint(0, 0);
double stp = ( (double) stepsTotal / ( (double) Waypoints.Count - 1 ) );
if (reverse) {
for (int index = Waypoints.Count - 1; index >= 1; index--) {
var waypoint = Waypoints[index];
var nextWaypoint = Waypoints[index - 1];
cur.X = waypoint.X * scale.X;
cur.Y = waypoint.Y * scale.Y;
dist.X = ( (double) nextWaypoint.X - waypoint.X ) / stp;
dist.Y = ( (double) nextWaypoint.Y - waypoint.Y ) / stp;
for (int i = 0; i < stp; i++) {
cur.X += dist.X * scale.X;
cur.Y += dist.Y * scale.Y;
yield return new Point((int) cur.X, (int) cur.Y);
}
}
} else {
for (int index = 0; index < Waypoints.Count - 1; index++) {
var waypoint = Waypoints[index];
var nextWaypoint = Waypoints[index + 1];
cur.X = waypoint.X * scale.X;
cur.Y = waypoint.Y * scale.Y;
dist.X = ( (double) nextWaypoint.X - waypoint.X ) / stp;
dist.Y = ( (double) nextWaypoint.Y - waypoint.Y ) / stp;
for (int i = 0; i < stp; i++) {
cur.X += dist.X * scale.X;
cur.Y += dist.Y * scale.Y;
yield return new Point((int) cur.X, (int) cur.Y);
}
}
}
}
public Point Add(DoublePoint scaleFactor)
{
X += (int) scaleFactor.X;
Y += (int) scaleFactor.Y;
return this;
}
public DoublePoint Offset(DoublePoint windowLocation)
{
return new DoublePoint(X + windowLocation.X, Y + windowLocation.Y);
}
public DoublePoint Negate(DoublePoint windowLocation)
{
return new DoublePoint(X - windowLocation.X, Y - windowLocation.Y);
}
public DoublePoint(DoublePoint pos)
{
X = pos.X;
Y = pos.Y;
}
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;
}
