private static long CountBounces(LineD shot)
{
long numBounces = 0;
LineD reflectedFrom = null;
LineD lastReflectedFrom = null;
PointD p = null;
LineDIntersection intersect;
do
{
// find intersection (try each of three lines)
p = null; // reset
reflectedFrom = null;
if (p == null && lastReflectedFrom != TopLine)
{
intersect = shot.GetIntersection(TopLine);
if (intersect.LinesIntersect)
{
p = intersect.Intersection;
reflectedFrom = TopLine;
}
}
if (p == null && lastReflectedFrom != LefLine)
{
intersect = shot.GetIntersection(LefLine);
if (intersect.LinesIntersect)
{
p = intersect.Intersection;
reflectedFrom = LefLine;
}
}
if (p == null && lastReflectedFrom != RigLine)
{
intersect = shot.GetIntersection(RigLine);
if (intersect.LinesIntersect)
{
p = intersect.Intersection;
reflectedFrom = RigLine;
}
}
// compute attack deltas. Reverse the "horizontal" determined by orientation!!!
// negate the "horizontal" element
// compute the new line
// increaseshot count
numBounces++;
lastReflectedFrom = reflectedFrom;
} while (p != Origin);
return numBounces;
}
private static void TestAndReportOnIntersection(LineD Line1, LineD Line2)
{
LineDIntersection hit = Line1.GetIntersection(Line2);
Console.WriteLine();
Console.WriteLine("Line1 {0}", Line1);
Console.WriteLine("Line2 {0}", Line2);
if (hit.LinesIntersect)
{
Console.WriteLine("Found Point {0}", hit.Intersection);
Console.WriteLine("ua {0} ub {1}", hit.ua, hit.ub);
}
else
{
if (hit.LinesAreParallel)
Console.WriteLine("Parallel");
else if (hit.LinesAreCoincident)
Console.WriteLine("Coincident");
else
{
Console.WriteLine("ua {0} ub {1}", hit.ua, hit.ub);
Console.WriteLine("May have hit, but not long enough!");
}
}
}