private SCNVector3 ComputeBallPosition(CameraInfo cameraInfo)
{
var cameraRay = cameraInfo.Ray;
// These should be based on the projectile radius.
// This affects centering of ball, and can hit near plane of camera
// This is always centering to one edge of screen independent of screen orient
// We always want the ball at the bottom of the screen.
var distancePullToCamera = 0.21f;
var ballShiftDown = 0.2f;
var targetBallPosition = cameraRay.Position + cameraRay.Direction * distancePullToCamera;
var cameraDown = -SCNVector4.Normalize(cameraInfo.Transform.Column1).Xyz;
targetBallPosition += cameraDown * ballShiftDown;
// Clamp to only the valid side
var pullWorldPosition = this.pullOrigin.WorldPosition;
if (pullWorldPosition.Z < 0f)
{
targetBallPosition.Z = Math.Min(targetBallPosition.Z, pullWorldPosition.Z);
}
else
{
targetBallPosition.Z = Math.Max(targetBallPosition.Z, pullWorldPosition.Z);
}
// Clamp to cone/circular core
var yDistanceFromPull = Math.Max(0f, pullWorldPosition.Y - targetBallPosition.Y);
var minBallDistanceFromPull = 0.5f;
var pullBlockConeSlope = 1.0f;
var pullBlockConeRadius = yDistanceFromPull / pullBlockConeSlope;
var pullBlockCoreRadius = Math.Max(minBallDistanceFromPull, pullBlockConeRadius);
// if pull is in the core, move it out.
var pullWorldPositionGrounded = new SCNVector3(pullWorldPosition.X, 0f, pullWorldPosition.Z);
var targetPullPositionGrounded = new SCNVector3(targetBallPosition.X, 0f, targetBallPosition.Z);
var targetInitialToTargetPull = targetPullPositionGrounded - pullWorldPositionGrounded;
if (pullBlockCoreRadius > targetInitialToTargetPull.Length)
{
var moveOutDirection = SCNVector3.Normalize(targetInitialToTargetPull);
var newTargetPullPositionGrounded = pullWorldPositionGrounded + moveOutDirection * pullBlockCoreRadius;
targetBallPosition = new SCNVector3(newTargetPullPositionGrounded.X, targetBallPosition.Y, newTargetPullPositionGrounded.Z);
}
// only use the 2d distance, so that user can gauage stretch indepdent of mtch
var distance2D = targetBallPosition - pullWorldPosition;
var stretchY = Math.Abs(distance2D.Y);
distance2D.Y = 0f;
var stretchDistance = distance2D.Length;
this.stretch = DigitExtensions.Clamp((double)stretchDistance, this.properties.MinStretch, this.properties.MaxStretch);
// clamp a little bit farther than maxStretch
// can't let the strap move back too far right now
var clampedStretchDistance = (float)(1.1d * this.properties.MaxStretch);
if (stretchDistance > clampedStretchDistance)
{
targetBallPosition = (clampedStretchDistance / stretchDistance) * (targetBallPosition - pullWorldPosition) + pullWorldPosition;
stretchDistance = clampedStretchDistance;
}
// Make this optional, not required. You're often at max stretch.
// Also have a timer for auto-launch. This makes it very difficuilt to test
// storing state in member data
this.IsPulledTooFar = stretchDistance > (float)(this.properties.MaxStretch) || stretchY > (float)(this.properties.MaxStretch);
return(targetBallPosition);
}
public void Update(CameraInfo cameraInfo)
{
this.UpdateVortexState();
}
public GrabInfo(int grabbableId, CameraInfo cameraInfo)
{
this.GrabbableId = grabbableId;
this.CameraInfo = cameraInfo;
}
public void Update(CameraInfo cameraInfo)
{
if (this.Delegate == null)
{
throw new Exception("No delegate");
}
// Do not move the lever after it has been activated
if (!(this.InteractionToActivate?.IsActivated ?? false))
{
if (this.activeSwitch != null)
{
// Lever Pulling
var cameraOffset = this.activeSwitch.PullOffset(cameraInfo.Ray.Position - this.startLeverHoldCameraPosition);
var cameraMovedZ = cameraOffset.Z;
var targetEulerX = this.startLeverEulerX + LeverPullZtoLeverEulerRotation * cameraMovedZ;
targetEulerX = DigitExtensions.Clamp(-LeverMaxEulerX, targetEulerX, LeverMaxEulerX);
this.activeSwitch.Angle = targetEulerX;
if (targetEulerX <= -LeverMaxEulerX)
{
// Interaction activation once the switch lever is turned all the way
this.InteractionToActivate?.Activate();
// Fade out the switches
var waitAction = SCNAction.Wait(3f);
var fadeAction = SCNAction.FadeOut(3d);
foreach (var resetSwitch in this.resetSwitches)
{
resetSwitch.Base.RunAction(SCNAction.Sequence(new SCNAction[] { waitAction, fadeAction }));
}
return;
}
else
{
// Inform peers of the movement
var leverId = this.resetSwitches.IndexOf(this.activeSwitch);
if (leverId == -1)
{
throw new Exception("No lever in array");
}
this.Delegate.DispatchActionToServer(new GameActionType {
LeverMove = new LeverMove(leverId, targetEulerX), Type = GameActionType.GActionType.LeverMove
});
}
}
else
{
// Lever spring back
foreach (var lever in this.resetSwitches.Where(lever => lever.Angle < LeverMaxEulerX))
{
lever.Angle = Math.Min(LeverMaxEulerX, lever.Angle + LeverSpringBackSpeed * (float)GameTime.DeltaTime);
}
}
// Highlight lever when nearby, otherwise check if we should hide the highlight
if (this.highlightedSwitch != null)
{
if (!this.highlightedSwitch.ShouldHighlight(cameraInfo.Ray))
{
this.highlightedSwitch.DoHighlight(false, this.SfxCoordinator);
this.highlightedSwitch = null;
}
}
else
{
foreach (var resetSwitch in this.resetSwitches)
{
if (resetSwitch.ShouldHighlight(cameraInfo.Ray))
{
resetSwitch.DoHighlight(true, this.SfxCoordinator);
this.highlightedSwitch = resetSwitch;
}
}
}
}
}