public void Update(GameTime gameTime)
{
var dt = (float)gameTime.ElapsedGameTime.TotalSeconds;
totalTime += dt;
JustTouched = false;
JustTapped = false;
TouchStartId = null;
state = TouchPanel.GetState();
TouchLocation?leftTouch = null, rightTouch = null;
if (tapStartCount > state.Count)
{
tapStartCount = state.Count;
// Workaround. Sometimes very fast taps won't be registered as TouchLocations with state of Released
// meaning the algorithm in the for loop below falls down :(
// Here we assume that only one tap was missed
if (state.Count == 0)
{
JustTapped = true;
TapPosition = tapStarts[0].Pos;
}
}
foreach (TouchLocation loc in state)
{
if (loc.State == TouchLocationState.Released)
{
int tapStartId = -1;
for (int i = 0; i < tapStartCount; ++i)
{
if (tapStarts[i].Id == loc.Id)
{
// This touch was released. Check if it was a tap
tapStartId = i;
// COMMENTED CODE WAS TO ENSURE TAPS ARE NOT REGISTERED FOR HOLDS (LONG TAPS)
//if ((Engine.Instance.TimeTotal - tapStarts[i].Time) < 1.0f)
//{
JustTapped = true;
TapPosition = loc.Position;
//}
//else
//{
// System.Diagnostics.Debug.WriteLine("Rejected touch: Held too long");
//}
break;
}
}
if (tapStartId >= 0)
{
// Remove the tap start as it has been released
for (int i = tapStartId; i < tapStartCount - 1; ++i)
{
tapStarts[i] = tapStarts[i + 1];
}
tapStartCount--;
}
continue;
}
else if (loc.State == TouchLocationState.Pressed && tapStartCount < tapStarts.Length)
{
// Started new touch
tapStarts[tapStartCount] = new TapStart(loc.Id, totalTime, loc.Position);
tapStartCount++;
JustTouched = true;
TouchStartId = loc.Id;
TouchStartPos = loc.Position;
}
// COMMENTED CODE WAS TO REMOVE TAPS THAT DEVIATE TOO FAR FROM THEIR ORIGINAL POSITION
//else
//{
// int removeTapId = -1;
// for (int i = 0; i < tapStartCount; ++i)
// {
// if (tapStarts[i].Id == loc.Id)
// {
// // Remove any tap that deviates too far from it's original position
// float distSqr = Vector2.DistanceSquared(tapStarts[i].Pos, loc.Position);
// if (distSqr > 3600.0f)
// {
// //System.Diagnostics.Debug.WriteLine("Rejected touch: Deviated too far");
// removeTapId = i;
// }
// break;
// }
// }
// if (removeTapId >= 0)
// {
// // Remove the tap start as it has moved further than is valid
// for (int i = removeTapId; i < tapStartCount - 1; ++i)
// tapStarts[i] = tapStarts[i + 1];
// tapStartCount--;
// }
//}
if (left.Stick.HasValue && loc.Id == left.Stick.Value.Id)
{
// Continue left touch
leftTouch = loc;
continue;
}
if (right.Stick.HasValue && loc.Id == right.Stick.Value.Id)
{
// Continue right touch
rightTouch = loc;
continue;
}
TouchLocation locPrev;
if (!loc.TryGetPreviousLocation(out locPrev))
{
locPrev = loc;
}
if (!left.Stick.HasValue)
{
// if we are not currently tracking a left thumbstick and this touch is on the left
// half of the screen, start tracking this touch as our left stick
if (left.StickStartRegion.Contains((int)locPrev.Position.X, (int)locPrev.Position.Y))
{
if (left.StickStyle == TouchStickStyle.Fixed)
{
if (Vector2.Distance(locPrev.Position, left.StartLocation) < left.AliveZoneSize)
{
leftTouch = locPrev;
}
}
else
{
leftTouch = locPrev;
left.StartLocation = leftTouch.Value.Position;
if (left.StartLocation.X < left.StickStartRegion.Left + left.DistFromScreenEdge)
{
left.StartLocation = new Vector2(left.StickStartRegion.Left + left.DistFromScreenEdge, left.StartLocation.Y);
}
if (left.StartLocation.Y > left.StickStartRegion.Bottom - left.DistFromScreenEdge)
{
left.StartLocation = new Vector2(left.StartLocation.X, left.StickStartRegion.Bottom - left.DistFromScreenEdge);
}
}
continue;
}
}
if (!right.Stick.HasValue && locPrev.Id != right.LastExcludedRightTouchId)
{
// if we are not currently tracking a right thumbstick and this touch is on the right
// half of the screen, start tracking this touch as our right stick
if (right.StickStartRegion.Contains((int)locPrev.Position.X, (int)locPrev.Position.Y))
{
// Check if any of the excluded regions contain the point
bool excluded = false;
foreach (Rectangle r in right.RightStickStartExcludeRegions)
{
if (r.Contains((int)locPrev.Position.X, (int)locPrev.Position.Y))
{
excluded = true;
right.LastExcludedRightTouchId = locPrev.Id;
continue;
}
}
if (excluded)
{
continue;
}
right.LastExcludedRightTouchId = -1;
if (right.StickStyle == TouchStickStyle.Fixed)
{
if (Vector2.Distance(locPrev.Position, right.StartLocation) < right.AliveZoneSize)
{
rightTouch = locPrev;
}
}
else
{
rightTouch = locPrev;
right.StartLocation = rightTouch.Value.Position;
// Ensure touch is not too close to screen edge
if (right.StartLocation.X > right.StickStartRegion.Right - right.DistFromScreenEdge)
{
right.StartLocation = new Vector2(right.StickStartRegion.Right - right.DistFromScreenEdge, right.StartLocation.Y);
}
if (right.StartLocation.Y > right.StickStartRegion.Bottom - right.DistFromScreenEdge)
{
right.StartLocation = new Vector2(right.StartLocation.X, right.StickStartRegion.Bottom - right.DistFromScreenEdge);
}
}
continue;
}
}
}
if (leftTouch.HasValue)
{
left.Stick = leftTouch;
left.StickPos = leftTouch.Value.Position;
left.EvaluatePoint(left.StickPos, dt);
}
else
{
bool foundNew = false;
if (left.Stick.HasValue)
{
// No left touch now but previously there was. Check to see if the TouchPanel decided
// to reset our touch id. Search for any touch within 10 pixel radius.
foreach (TouchLocation loc in state)
{
Vector2 pos = loc.Position;
var tmp = left.StickPos;
float distSqr; Vector2.DistanceSquared(ref pos, ref tmp, out distSqr);
if (distSqr < 100f)
{
foundNew = true;
left.Stick = loc;
left.StickPos = loc.Position;
left.EvaluatePoint(left.StickPos, dt);
}
}
}
if (!foundNew)
{
left.Stick = null;
left.StickDirection = Vector2.Zero;
left.StickMagnitude = 0.0f;
}
}
if (rightTouch.HasValue)
{
right.Stick = rightTouch;
right.StickPos = rightTouch.Value.Position;
right.EvaluatePoint(right.StickPos, dt);
}
else
{
bool foundNew = false;
if (right.Stick.HasValue)
{
// No right touch now but previously there was. Check to see if the TouchPanel decided
// to reset our touch id. Search for any touch within 10 pixel radius.
foreach (TouchLocation loc in state)
{
Vector2 pos = loc.Position;
var tmp = right.StickPos;
float distSqr; Vector2.DistanceSquared(ref pos, ref tmp, out distSqr);
if (distSqr < 100f)
{
foundNew = true;
right.Stick = loc;
right.StickPos = loc.Position;
right.EvaluatePoint(right.StickPos, dt);
}
}
}
//
if (!foundNew)
{
right.Stick = null;
right.StickDirection = Vector2.Zero;
right.StickMagnitude = 0.0f;
}
}
}
