public override void Update(float deltaSeconds)
{
base.Update(deltaSeconds);
if (DepthReference != null)
{
SpatialData spatial = DepthReference.GetWorldSpatialData();
RenderDepth = Global.Game.CalcDepth(spatial, Owner.Layer);
if (DebugDrawingEnabled)
{
Global.Game.DebugDrawCommands.Add(view =>
{
view.DrawPoint(spatial.Position, Conversion.ToMeters(3), Color.Navy);
});
}
}
}
public void PerformChase(float deltaSeconds)
{
Body body = MyBody;
if (Target != null)
{
Vector2 worldPosition = this.GetWorldSpatialData().Position;
Vector2 targetPosition = Target.GetWorldSpatialData().Position;
Vector2 targetDelta = targetPosition - worldPosition;
targetDelta.GetDirectionAndLength(out Vector2 targetDir, out float targetDistance);
if (targetDistance > TargetRange)
{
// Note(manu): Without this value the target would always be out of range until it has _completely_ stopped.
const float compensationForSlowMovement = 0.01f;
Vector2 newPosition = targetPosition - (targetDir * (TargetRange - compensationForSlowMovement));
if (body != null)
{
Debug.Assert(body.BodyType == BodyType.Static);
body.Position = newPosition;
}
else
{
Spatial.SetWorldPosition(newPosition);
}
}
else if (targetDistance > TargetInnerRange)
{
float relevantTargetDistance = targetDistance - TargetInnerRange;
float weightedDistance = relevantTargetDistance * SpeedFactor;
Vector2 velocity = targetDir * weightedDistance;
if (body != null)
{
if (body.BodyType == BodyType.Static)
{
Vector2 deltaPosition = velocity * deltaSeconds;
body.Position += deltaPosition;
}
else
{
// TODO(manu): Setting the linear velocity is kind of bad. Can we do this with an impulse instead?
// Note(manu): This code path is untested (2017-06-15).
body.LinearVelocity = velocity;
}
}
else
{
Vector2 deltaPosition = velocity * deltaSeconds;
Vector2 newPosition = worldPosition + deltaPosition;
Spatial.SetWorldPosition(newPosition);
}
}
}
if (DebugDrawingEnabled)
{
Global.Game.DebugDrawCommands.Add(view =>
{
Vector2 p = this.GetWorldSpatialData().Position;
view.DrawPoint(p, Conversion.ToMeters(3.0f), Color.Turquoise);
view.DrawCircle(p, TargetInnerRange, Color.Yellow);
view.DrawCircle(p, TargetRange, Color.Blue);
});
}
}
