Fun With Gravity

using System;
using System.Drawing;

namespace ParticleSwarm {
	public class SingleParticle : ParticleSystem {
		private Particle p;

		public SingleParticle() {
			p = new Particle(new Vector(2, 40, 0), new Vector(0.4f, 0, 0), 2, 2, Color.Black);
			base.particles.Add(p);
		}
		public SingleParticle(Particle p) {
			this.p = p;
		}

		public override void Draw(Graphics g, Rectangle bounds) {
			if (p.Location.X >= bounds.Width - 6 || p.Location.Y >= bounds.Bottom - 6) {
				base.IsRunning = false;
			}
			Brush b = new SolidBrush(p.Color);
			Brush back = new SolidBrush(SystemColors.Control);

			float size = p.Size + p.Location.Z;
			if (size < 1) { size = 1; }
			if (!base.trace) { g.Clear(Color.White); }

			p.Velocity.Y += 0.001f;
			p.Velocity.X += 0.003f;
			//p.Velocity.Z += 0.0002f;

			p.Update();
			Pen pn = new Pen(b, 1f);
			g.DrawEllipse(pn, p.Location.X, p.Location.Y, size, size);
		}
	}
}