// Draw the current generation.
internal void DrawGeneration(
LifeGeneration genCurr,
LifeGeneration genPrev,
Graphics graphLifeGame)
{
// Calculate the range of rows to display.
int displayLo =
genCurr.middle - ((LifeMain.noofDisplay - 1) / 2);
int displayHi =
displayLo + (LifeMain.noofDisplay - 1);
// For each of those rows.
for (int j = displayLo; j <= displayHi; j++)
{
// Only draw the row if necessary.
if (LifeMain.boolPaintAll == true ||
genCurr.countGeneration <= 1 ||
genCurr.Rows[j].CompareTo(genPrev.Rows[j])
!= 0)
{
this.DrawRow(genCurr.Rows[j],
genPrev.Rows[j],
j,
graphLifeGame);
}
}
}
internal void CopyTo(LifeGeneration genTarget)
{
// Copy the relevant info from gen to gen.
for (int j = lo; j <= hi; j++)
{
this.Rows[j].CopyTo(genTarget.Rows[j]);
}
genTarget.countGeneration = this.countGeneration;
}
internal int CompareTo(LifeGeneration genTarget)
{
// CompareTo tradionally returns three
// possible values, 0 (==), -1 (<)
// and +1 (>); and we wish to
// maintain that convention. But,
// for a generation, only "=="
// and "!=" is meaningful. So the
// definition of "<" and ">" is somewhat
// arbitrary here.
if (genTarget == null)
{
return(1);
}
if (this.noofLive == 0 && genTarget.noofLive == 0)
{
return(0);
}
if (this.noofLive < genTarget.noofLive)
{
return(-1);
}
if (this.noofLive > genTarget.noofLive)
{
return(1);
}
for (int j = lo; j <= hi; j++)
{
if (Rows[j].CompareTo(genTarget.Rows[j]) == 0)
{
continue;
}
if (Rows[j].CompareTo(genTarget.Rows[j]) < 0)
{
return(-1);
}
if (Rows[j].CompareTo(genTarget.Rows[j]) > 0)
{
return(+1);
}
}
return(0);
}
public void CalcNextGen()
{
// Have the current generation calculate
// the next generation.
genNext = genCurr.CalcNextGen();
// Check to see if a static state has been
// has been reached.
if (genNext.countGeneration >= 4 && genNext.CompareTo(genFour) == 0)
{
OnStableStateReached();
}
// Age the generations
genFour = genGrand;
genGrand = genPrev;
genPrev = genCurr;
genCurr = genNext;
}
internal LifeGeneration CalcNextGen()
{
// Each row is used to calculate its next
// generation.
// The target row, the row above, and the
// row below must be examined to determine
// the target row's next generation.
// The outermost border of cells is always
// left blank.
LifeGeneration genNext = new LifeGeneration();
genNext.countGeneration = this.countGeneration + 1;
genNext.Rows[lo] = new LifeRow();
for (int j = lo + 1; j <= hi - 1; j++)
{
genNext.Rows[j] =
Rows[j].CalcNextGen(Rows[j - 1], Rows[j + 1]);
}
genNext.Rows[hi] = new LifeRow();
return(genNext);
}
