public override void Update(GameTime gameTime, IActor actor)
{
Actor3D parentActor = actor as Actor3D;
DrawnActor3D targetDrawnActor = this.TargetActor as DrawnActor3D;
if (this.bFirstUpdate)
{
//set the initial position of the camera
parentActor.Transform3D.Translation = railParameters.MidPoint;
this.bFirstUpdate = false;
}
//get look vector to target
Vector3 cameraToTarget = MathUtility.GetNormalizedObjectToTargetVector(parentActor.Transform3D, targetDrawnActor.Transform3D);
//new position for camera if it is positioned between start and the end points of the rail
Vector3 projectedCameraPosition = parentActor.Transform3D.Translation
+ Vector3.Dot(cameraToTarget, railParameters.Look) * railParameters.Look * gameTime.ElapsedGameTime.Milliseconds;
//do not allow the camera to move outside the rail
if (railParameters.InsideRail(projectedCameraPosition))
{
parentActor.Transform3D.Translation = projectedCameraPosition;
}
//set the camera to look at the object
parentActor.Transform3D.Look = cameraToTarget;
//set the camera to look at the target object
parentActor.Transform3D.Look = Vector3.Lerp(this.oldCameraToTarget, cameraToTarget, lerpSpeed);
//store old values for lerp
this.oldCameraToTarget = cameraToTarget;
}
public override void Update(GameTime gameTime, IActor actor)
{
Actor3D parentActor = actor as Actor3D;
DrawnActor3D targetDrawnActor = this.TargetActor as DrawnActor3D;
if (targetDrawnActor != null)
{
if (this.bFirstUpdate)
{
//set the initial position of the camera
parentActor.Transform.Translation = railParameters.MidPoint;
this.bFirstUpdate = false;
}
//get look vector to target
Vector3 cameraToTarget = MathUtility.GetNormalizedObjectToTargetVector(parentActor.Transform, targetDrawnActor.Transform);
cameraToTarget = MathUtility.Round(cameraToTarget, 3); //round to prevent floating-point precision errors across updates
//new position for camera if it is positioned between start and the end points of the rail
Vector3 projectedCameraPosition = parentActor.Transform.Translation + Vector3.Dot(cameraToTarget, railParameters.Look) * railParameters.Look; // gameTime.ElapsedGameTime.Milliseconds; //removed gameTime multiplier - was causing camera judder when object close to camera
projectedCameraPosition = MathUtility.Round(projectedCameraPosition, 3); //round to prevent floating-point precision errors across updates
//do not allow the camera to move outside the rail
if (railParameters.InsideRail(projectedCameraPosition))
{
parentActor.Transform.Translation = projectedCameraPosition;
}
//set the camera to look at the object
parentActor.Transform.Look = cameraToTarget;
}
}
