public Explosive(Explosive other)
{
center_of_object = new Point3D(other.center_of_object.GetPoint().X, other.center_of_object.GetPoint().Y, other.center_of_object.GetZ());
velocity = new double[3];
acceleration = new double[3];
Array.Copy(other.velocity, velocity, 3);
Array.Copy(other.acceleration, acceleration, 3);
max_age = 50;
color = Color.FromArgb(other.color.A, other.color.R, other.color.G, other.color.B);
size = other.size;
age = other.age;
}
public override List <Particle> Die()
{
List <Particle> pieces = new List <Particle>();
if (tracer)
{
return(pieces);
}
Random rand = new Random(DateTime.Now.Millisecond);
double degrees = 360 / num_pieces;
if (degrees == 0.0)
{
double temp = 360 / Convert.ToDouble(num_pieces);
while (temp < 1)
{
temp *= 10.0;
}
degrees = Convert.ToInt32(temp);
}
double percent = rand.NextDouble();
while (percent < 0.5)
{
percent = rand.NextDouble();
}
for (int i = 0; i < num_pieces; i++)
{
double val = rand.Next(1, 50);
double velx = (val * percent) * Math.Cos(Math.PI * degrees * i / 180.0);
double vely = (val * percent) * Math.Sin(Math.PI * degrees * i / 180.0);
//"explode" particles in 360 degrees around the center point all with varying initial velocities in X & Y directions
Explosive exp = new Explosive(center_of_object.GetPoint().X, center_of_object.GetPoint().Y, 0, 0, -9.8, velx, vely);
pieces.Add(exp);
}
return(pieces);
}
public bool UpdateSystem(Graphics g, int w = 0, int h = 0)
{
height = h;
width = w;
pixels = new int[height, width]; //all initialized to 0 which equates to black
bool drawn = false;
//if there are no particles in the system - nothing to do
if (particles.Count == 0)
{
frame = 0;
return(false);
}
List <Particle> dead_items = new List <Particle>();
List <Particle> new_items = new List <Particle>();
for (int i = particles.Count - 1; i >= 0; i--)
{
Particle part = particles[i];
//no change in acceleration
part.Move(0.0, 0.0);
int aging_factor = 1;
if (part.GetTracer())
{
aging_factor = 3;
}
part.AgeParticle(aging_factor);
part.Draw(g);
if (save_images)
{
if (part.Draw(height, width, pixels))
{
drawn = true;
}
}
if (!part.IsAlive())
{
List <Particle> items = part.Die();
dead_items.Add(part);
if (items != null)
{
foreach (var particle in items)
{
new_items.Add(particle);
}
}
}
}
//walk the particles looking to see if they have tracers
List <Particle> aged_particles = new List <Particle>();
foreach (var part in particles)
{
if (part.LeaveTrace())
{
Rocket rock = part as Rocket;
if (rock != null)
{
if (!rock.GetTracer())
{
Rocket temp = new Rocket(rock);
temp.SetTracer(true);
temp.Slow();
aged_particles.Add(temp);
}
}
else
{
Explosive exp = part as Explosive;
if (!exp.GetTracer())
{
Explosive temp = new Explosive(exp);
temp.SetTracer(true);
temp.Slow();
aged_particles.Add(temp);
}
}
}
}
if (dead_items.Count > 0)
{
foreach (var deadItem in dead_items)
{
particles.Remove(deadItem);
}
}
if (new_items.Count > 0)
{
foreach (var particle in new_items)
{
particles.Add(particle);
}
}
if (aged_particles.Count > 0)
{
foreach (var particle in aged_particles)
{
particles.Add(particle);
}
}
if (save_images && drawn)
{
ColorManipulation manip = new ColorManipulation();
manip.H = height;
manip.W = width;
string file_name = string.Format("particle_{0,4:D4}_{1}.png", frame, animation);
manip.SaveToImage(pixels, file_name);
frame++;
}
if (particles.Count == 0)
{
animation++;
}
return(true);
}