private void PreStep(float step)
{
const float MaxTilt = 1.5f;
timer.Update(step);
var t = timer.Progress;
if (direction)
{
t = 1 - t;
}
t = Ease.Compute(t, EaseTypes.QuadraticInOut);
angle += AngularSpeed * step;
float tilt = Ease.Compute(t, EaseTypes.QuadraticInOut) * MaxTilt - MaxTilt / 2;
var p = vec3.Lerp(p1, p2, Ease.Compute(t, EaseTypes.Linear)).ToJVector();
var o = p1.y == p2.y
? quat.Identity//quat.FromAxisAngle(angle, vec3.UnitY) * quat.FromAxisAngle(tilt, vec3.UnitX)
: quat.Identity;
controllingBody.SetTransform(p, o.ToJMatrix(), step);
}
// Using this view, the camera can pan either 1) between two points (using this function), or 2) along a curved
// path (using the overloaded version below).
public void Refresh(vec3 p1, vec3 p2, float duration, EaseTypes ease)
{
if (!timer.IsPaused)
{
timer.Elapsed = 0;
}
timer.Duration = duration;
timer.Tick = t =>
{
Recompute(vec3.Lerp(p1, p2, Ease.Compute(t, ease)), true);
};
timer.IsPaused = false;
// When a pan begins, the camera is immediately snapped to the starting transform.
Recompute(p1, false);
}
public void Update(float dt)
{
elapsed += dt;
float t;
if (elapsed >= duration)
{
// This ignores any leftover time (such that the end state is set exactly).
t = 1;
IsComplete = true;
}
else
{
t = elapsed / duration;
}
Smooth(Ease.Compute(t, easeType));
}