// Update the segment's position and compute a smoothed velocity for the circle or the
// endpoints of the segment based on the time it took it to move from the last position
// to the current one. The velocity is in pixels per second.
public void UpdateSegment(Segment s)
{
segLast = seg;
seg = s;
DateTime cur = DateTime.Now;
double fMs = cur.Subtract(timeLastUpdated).TotalMilliseconds;
if (fMs < 10.0)
{
fMs = 10.0;
}
double fFPS = 1000.0 / fMs;
timeLastUpdated = cur;
if (seg.IsCircle())
{
xVel = xVel * smoothing + (1.0 - smoothing) * (seg.x1 - segLast.x1) * fFPS;
yVel = yVel * smoothing + (1.0 - smoothing) * (seg.y1 - segLast.y1) * fFPS;
}
else
{
xVel = xVel * smoothing + (1.0 - smoothing) * (seg.x1 - segLast.x1) * fFPS;
yVel = yVel * smoothing + (1.0 - smoothing) * (seg.y1 - segLast.y1) * fFPS;
xVel2 = xVel2 * smoothing + (1.0 - smoothing) * (seg.x2 - segLast.x2) * fFPS;
yVel2 = yVel2 * smoothing + (1.0 - smoothing) * (seg.y2 - segLast.y2) * fFPS;
}
}
// Using the velocity calculated above, estimate where the segment is right now.
public Segment GetEstimatedSegment(DateTime cur)
{
Segment estimate = seg;
double fMs = cur.Subtract(timeLastUpdated).TotalMilliseconds;
estimate.x1 += fMs * xVel / 1000.0;
estimate.y1 += fMs * yVel / 1000.0;
if (seg.IsCircle())
{
estimate.x2 = estimate.x1;
estimate.y2 = estimate.y1;
}
else
{
estimate.x2 += fMs * xVel2 / 1000.0;
estimate.y2 += fMs * yVel2 / 1000.0;
}
return(estimate);
}
// Hit testing between this thing and a single segment. If hit, the center point on
// the segment being hit is returned, along with the spot on the line from 0 to 1 if
// a line segment was hit.
public bool Hit(Segment seg, ref Point ptHitCenter, ref double lineHitLocation)
{
double minDxSquared = size + seg.radius;
minDxSquared *= minDxSquared;
// See if falling thing hit this body segment
if (seg.IsCircle())
{
if (SquaredDistance(center.X, center.Y, seg.x1, seg.y1) <= minDxSquared)
{
ptHitCenter.X = seg.x1;
ptHitCenter.Y = seg.y1;
lineHitLocation = 0;
return true;
}
}
else
{
double sqrLineSize = SquaredDistance(seg.x1, seg.y1, seg.x2, seg.y2);
if (sqrLineSize < 0.5) // if less than 1/2 pixel apart, just check dx to an endpoint
{
return (SquaredDistance(center.X, center.Y, seg.x1, seg.y1) < minDxSquared) ? true : false;
}
else
{ // Find dx from center to line
double u = ((center.X - seg.x1) * (seg.x2 - seg.x1) + (center.Y - seg.y1) * (seg.y2 - seg.y1)) / sqrLineSize;
if ((u >= 0) && (u <= 1.0))
{ // Tangent within line endpoints, see if we're close enough
double xIntersect = seg.x1 + (seg.x2 - seg.x1) * u;
double yIntersect = seg.y1 + (seg.y2 - seg.y1) * u;
if (SquaredDistance(center.X, center.Y,
xIntersect, yIntersect) < minDxSquared)
{
lineHitLocation = u;
ptHitCenter.X = xIntersect;
ptHitCenter.Y = yIntersect; ;
return true;
}
}
else
{
// See how close we are to an endpoint
if (u < 0)
{
if (SquaredDistance(center.X, center.Y, seg.x1, seg.y1) < minDxSquared)
{
lineHitLocation = 0;
ptHitCenter.X = seg.x1;
ptHitCenter.Y = seg.y1;
return true;
}
}
else
{
if (SquaredDistance(center.X, center.Y, seg.x2, seg.y2) < minDxSquared)
{
lineHitLocation = 1;
ptHitCenter.X = seg.x2;
ptHitCenter.Y = seg.y2;
return true;
}
}
}
}
return false;
}
return false;
}
// Update the segment's position and compute a smoothed velocity for the circle or the
// endpoints of the segment based on the time it took it to move from the last position
// to the current one. The velocity is in pixels per second.
public void UpdateSegment(Segment s)
{
segLast = seg;
seg = s;
DateTime cur = DateTime.Now;
double fMs = cur.Subtract(timeLastUpdated).TotalMilliseconds;
if (fMs < 10.0)
fMs = 10.0;
double fFPS = 1000.0 / fMs;
timeLastUpdated = cur;
if (seg.IsCircle())
{
xVel = xVel * smoothing + (1.0 - smoothing) * (seg.x1 - segLast.x1) * fFPS;
yVel = yVel * smoothing + (1.0 - smoothing) * (seg.y1 - segLast.y1) * fFPS;
}
else
{
xVel = xVel * smoothing + (1.0 - smoothing) * (seg.x1 - segLast.x1) * fFPS;
yVel = yVel * smoothing + (1.0 - smoothing) * (seg.y1 - segLast.y1) * fFPS;
xVel2 = xVel2 * smoothing + (1.0 - smoothing) * (seg.x2 - segLast.x2) * fFPS;
yVel2 = yVel2 * smoothing + (1.0 - smoothing) * (seg.y2 - segLast.y2) * fFPS;
}
}
public HitType LookForHits(Dictionary <Bone, BoneData> segments, int playerId)
{
DateTime cur = DateTime.Now;
HitType allHits = HitType.None;
// Zero out score if necessary
if (!scores.ContainsKey(playerId))
{
scores.Add(playerId, 0);
}
foreach (var pair in segments)
{
for (int i = 0; i < things.Count; i++)
{
HitType hit = HitType.None;
Thing thing = things[i];
switch (thing.state)
{
case ThingState.Bouncing:
case ThingState.Falling:
{
var ptHitCenter = new Point(0, 0);
double lineHitLocation = 0;
Segment seg = pair.Value.GetEstimatedSegment(cur);
if (thing.Hit(seg, ref ptHitCenter, ref lineHitLocation))
{
double fMs = 1000;
if (thing.timeLastHit != DateTime.MinValue)
{
fMs = cur.Subtract(thing.timeLastHit).TotalMilliseconds;
thing.avgTimeBetweenHits = thing.avgTimeBetweenHits * 0.8 + 0.2 * fMs;
}
thing.timeLastHit = cur;
// Bounce off head and hands
if (seg.IsCircle())
{
// Bounce off of hand/head/foot
thing.BounceOff(ptHitCenter.X, ptHitCenter.Y, seg.radius,
pair.Value.xVel / targetFrameRate, pair.Value.yVel / targetFrameRate);
if (fMs > 100.0)
{
hit |= HitType.Hand;
}
}
else // Bonce off line segment
{
double xVel = pair.Value.xVel * (1.0 - lineHitLocation) + pair.Value.xVel2 * lineHitLocation;
double yVel = pair.Value.yVel * (1.0 - lineHitLocation) + pair.Value.yVel2 * lineHitLocation;
thing.BounceOff(ptHitCenter.X, ptHitCenter.Y, seg.radius,
xVel / targetFrameRate, yVel / targetFrameRate);
if (fMs > 100.0)
{
hit |= HitType.Arm;
}
}
if (gameMode == GameMode.TwoPlayer)
{
if (thing.state == ThingState.Falling)
{
thing.state = ThingState.Bouncing;
thing.touchedBy = playerId;
thing.hotness = 1;
thing.flashCount = 0;
}
else if (thing.state == ThingState.Bouncing)
{
if (thing.touchedBy != playerId)
{
if (seg.IsCircle())
{
thing.touchedBy = playerId;
thing.hotness = Math.Min(thing.hotness + 1, 4);
}
else
{
hit |= HitType.Popped;
AddToScore(thing.touchedBy, 5 << (thing.hotness - 1), thing.center);
}
}
}
}
else if (gameMode == GameMode.Solo)
{
if (seg.IsCircle())
{
if (thing.state == ThingState.Falling)
{
thing.state = ThingState.Bouncing;
thing.touchedBy = playerId;
thing.hotness = 1;
thing.flashCount = 0;
}
else if ((thing.state == ThingState.Bouncing) && (fMs > 100.0))
{
hit |= HitType.Popped;
AddToScore(thing.touchedBy,
(pair.Key.joint1 == JointID.FootLeft || pair.Key.joint1 == JointID.FootRight) ? 10 : 5,
thing.center);
thing.touchedBy = playerId;
}
}
}
things[i] = thing;
if (thing.avgTimeBetweenHits < 8)
{
hit |= HitType.Popped | HitType.Squeezed;
if (gameMode != GameMode.Off)
{
AddToScore(playerId, 1, thing.center);
}
}
}
}
break;
}
if ((hit & HitType.Popped) != 0)
{
thing.state = ThingState.Dissolving;
thing.dissolve = 0;
thing.xVelocity = thing.yVelocity = 0;
thing.spinRate = thing.spinRate * 6 + 0.2;
things[i] = thing;
}
allHits |= hit;
}
}
return(allHits);
}
// Hit testing between this thing and a single segment. If hit, the center point on
// the segment being hit is returned, along with the spot on the line from 0 to 1 if
// a line segment was hit.
public bool Hit(Segment seg, ref Point ptHitCenter, ref double lineHitLocation)
{
double minDxSquared = size + seg.radius;
minDxSquared *= minDxSquared;
// See if falling thing hit this body segment
if (seg.IsCircle())
{
if (SquaredDistance(center.X, center.Y, seg.x1, seg.y1) <= minDxSquared)
{
ptHitCenter.X = seg.x1;
ptHitCenter.Y = seg.y1;
lineHitLocation = 0;
return(true);
}
}
else
{
double sqrLineSize = SquaredDistance(seg.x1, seg.y1, seg.x2, seg.y2);
if (sqrLineSize < 0.5) // if less than 1/2 pixel apart, just check dx to an endpoint
{
return((SquaredDistance(center.X, center.Y, seg.x1, seg.y1) < minDxSquared) ? true : false);
}
else
{ // Find dx from center to line
double u = ((center.X - seg.x1) * (seg.x2 - seg.x1) + (center.Y - seg.y1) * (seg.y2 - seg.y1)) / sqrLineSize;
if ((u >= 0) && (u <= 1.0))
{ // Tangent within line endpoints, see if we're close enough
double xIntersect = seg.x1 + (seg.x2 - seg.x1) * u;
double yIntersect = seg.y1 + (seg.y2 - seg.y1) * u;
if (SquaredDistance(center.X, center.Y,
xIntersect, yIntersect) < minDxSquared)
{
lineHitLocation = u;
ptHitCenter.X = xIntersect;
ptHitCenter.Y = yIntersect;;
return(true);
}
}
else
{
// See how close we are to an endpoint
if (u < 0)
{
if (SquaredDistance(center.X, center.Y, seg.x1, seg.y1) < minDxSquared)
{
lineHitLocation = 0;
ptHitCenter.X = seg.x1;
ptHitCenter.Y = seg.y1;
return(true);
}
}
else
{
if (SquaredDistance(center.X, center.Y, seg.x2, seg.y2) < minDxSquared)
{
lineHitLocation = 1;
ptHitCenter.X = seg.x2;
ptHitCenter.Y = seg.y2;
return(true);
}
}
}
}
return(false);
}
return(false);
}
