예제 #1
0
 /// <summary>
 /// Gets the force.
 /// </summary>
 /// <param name="s">The s.</param>
 public override void GetForce(Spring s) {
   ForceItem item1 = s.Item1;
   ForceItem item2 = s.Item2;
   float length = (s.Length < 0 ? parms[SpringLength] : s.Length);
   float x1 = item1.Location[0], y1 = item1.Location[1];
   float x2 = item2.Location[0], y2 = item2.Location[1];
   float dx = x2 - x1, dy = y2 - y1;
   float r = (float)Math.Sqrt(dx * dx + dy * dy);
   if (r == 0.0) {
     dx = ((float)rnd.NextDouble() - 0.5f) / 50.0f;
     dy = ((float)rnd.NextDouble() - 0.5f) / 50.0f;
     r = (float)Math.Sqrt(dx * dx + dy * dy);
   }
   float d = r - length;
   float coeff = (s.Coeff < 0 ? parms[SpringCoeff] : s.Coeff) * d / r;
   item1.Force[0] += coeff * dx;
   item1.Force[1] += coeff * dy;
   item2.Force[0] += -coeff * dx;
   item2.Force[1] += -coeff * dy;
 }
예제 #2
0
        /// <summary>
        /// Gets the force.
        /// </summary>
        /// <param name="s">The s.</param>
        public override void GetForce(Spring s)
        {
            ForceItem item1 = s.Item1;
            ForceItem item2 = s.Item2;
            float     length = (s.Length < 0 ? parms[SpringLength] : s.Length);
            float     x1 = item1.Location[0], y1 = item1.Location[1];
            float     x2 = item2.Location[0], y2 = item2.Location[1];
            float     dx = x2 - x1, dy = y2 - y1;
            float     r = (float)Math.Sqrt(dx * dx + dy * dy);

            if (r == 0.0)
            {
                dx = ((float)rnd.NextDouble() - 0.5f) / 50.0f;
                dy = ((float)rnd.NextDouble() - 0.5f) / 50.0f;
                r  = (float)Math.Sqrt(dx * dx + dy * dy);
            }
            float d     = r - length;
            float coeff = (s.Coeff < 0 ? parms[SpringCoeff] : s.Coeff) * d / r;

            item1.Force[0] += coeff * dx;
            item1.Force[1] += coeff * dy;
            item2.Force[0] += -coeff * dx;
            item2.Force[1] += -coeff * dy;
        }
예제 #3
0
 /// <summary>
 /// Updates the force calculation on the given Spring. The ForceItems
 /// attached to Spring will have their force values updated appropriately.
 /// </summary>
 /// <param name="spring">spring the Spring on which to compute updated forces</param>
 public virtual void GetForce(Spring spring)
 {
     throw new NotImplementedException("This class does not support this operation");
 }
예제 #4
0
 /// <summary>
 /// Updates the force calculation on the given Spring. The ForceItems
 /// attached to Spring will have their force values updated appropriately.
 /// </summary>
 /// <param name="spring">spring the Spring on which to compute updated forces</param>
 public virtual void GetForce(Spring spring)
 {
     throw new NotImplementedException("This class does not support this operation");
 }
예제 #5
0
 /// <summary>
 /// Reclaim a Spring into the object pool.
 /// </summary>
 public void reclaim(Spring s)
 {
     s.Item1 = null;
     s.Item2 = null;
     if (springs.Count < Capacity)
         springs.Add(s);
 }