public VelocityFunctionPredator(Predator current, Prey best, double clamp, double alphax, double betax, double alphay, double betay, Bitmap bmp, double tired)
{
this.current = current;
this.best = best;
this.clamp = clamp;
this.alphax = alphax + huntBest;
this.betax = betax * fogetPast;
this.alphay = alphay + huntBest;
this.betay = betay * fogetPast;
this.bmp = bmp;
this.maxheight = bmp.Height - 1;
this.maxwidth = bmp.Width - 1;
this.tired = tired;
}
public Prey newPrey()
{
//update Velocity
current.Velocity.y += (clamp * alphay * (current.Posbest.y - current.CurrentPostion.y) + clamp * betay * (best.CurrentPostion.y - current.CurrentPostion.y)) * tired;
current.Velocity.x += (clamp * alphax * (current.Posbest.x - current.CurrentPostion.x) + clamp * betax * (best.CurrentPostion.x - current.CurrentPostion.x)) * tired;
// Add fear of predator
int newx = ((int)current.Velocity.x + current.CurrentPostion.x);
int newy = ((int)current.Velocity.y + current.CurrentPostion.y);
bool changeDir = false;
if (predatorConsider)
{
// we will look around the destimation point if there is predator
//alter x or y velocity
foreach (Predator p in predatorsBeforeMoveList)
{
if (Math.Abs(newx - p.CurrentPostion.x) < fearRadius && Math.Abs(newy - p.CurrentPostion.y) < fearRadius)
{
changeDir = true;
Scary = p;
break;
}
}
if (changeDir)
{
switch (rnd.Next(3))
{
case 0:
current.Velocity.y = -current.Velocity.y;
break;
case 1:
current.Velocity.y = -current.Velocity.y;
current.Velocity.x = -current.Velocity.x;
break;
case 2:
current.Velocity.x = -current.Velocity.x;
break;
}
}
}
newx = ((int)current.Velocity.x + current.CurrentPostion.x);
newy = ((int)current.Velocity.y + current.CurrentPostion.y);
if ((current.CurrentPostion.x == best.CurrentPostion.x) && (current.CurrentPostion.y == best.CurrentPostion.y))
{
// dont touch it
if (changeDir)
{
//***********************************************************************
newx = ((int)Scary.Velocity.x + Scary.CurrentPostion.x);
newy = ((int)Scary.Velocity.y + Scary.CurrentPostion.y);
if (newx > maxwidth)
{
newx = maxwidth;
current.Velocity.x = 0;
}
if (newx < 0)
{
newx = 0;
}
if (newy > maxheight)
{
newy = maxheight;
current.Velocity.y = 0;
}
if (newy < 0)
{
newy = 0;
}
current.CurrentPostion.x = newx;
current.CurrentPostion.y = newy;
current.CurrentPostion.score = bmp.GetPixel(newx, newy).B;
//**********************************************************************
}
else
{
current.Velocity.x = 0;
current.Velocity.y = 0;
}
}
else
{
if (newx > maxwidth)
{
newx = maxwidth;
current.Velocity.x = 0;
}
if (newx < 0)
{
newx = 0;
}
if (newy > maxheight)
{
newy = maxheight;
current.Velocity.y = 0;
}
if (newy < 0)
{
newy = 0;
}
current.CurrentPostion.score = bmp.GetPixel(newx, newy).B;
current.CurrentPostion.x = newx;
current.CurrentPostion.y = newy;
}
return(current);
}
