/// <summary>
/// Sets the view state.
/// </summary>
/// <param name="viewState">New <see cref="ViewState"/> to apply to the view.</param>
protected override void SetViewState(ViewState viewState)
{
PdbViewState pdbViewState = viewState as PdbViewState;
if (pdbViewState != null)
{
this.structureControl.SetViewState(pdbViewState);
}
}
/// <summary>
/// Calculates a decent orientation of the molecule based on the bounding box of the
/// currently selected atoms. Used for animating to the center of a selection.
/// </summary>
/// <returns>The generated view state representing the desired orientation.</returns>
internal PdbViewState GetSelectionViewState()
{
Vector3D center = new Vector3D();
foreach (Atom atom in this.SelectedAtoms)
{
center.X += atom.Position.X;
center.Y += atom.Position.Y;
center.Z += atom.Position.Z;
}
center.X /= this.SelectedAtoms.Count;
center.Y /= this.SelectedAtoms.Count;
center.Z /= this.SelectedAtoms.Count;
double radius = 16;
foreach (Atom atom in this.SelectedAtoms)
{
Vector3D vector = new Vector3D(atom.Position.X - center.X,
atom.Position.Y - center.Y, atom.Position.Z - center.Z);
radius = Math.Max(radius, vector.LengthSquared);
}
radius = Math.Sqrt(radius);
center.X += this.translateTransform.OffsetX;
center.Y += this.translateTransform.OffsetY;
center.Z += this.translateTransform.OffsetZ;
double moleculeRadius = 1.25 / this.scaleTransform.ScaleX;
double scale = 0.8 * moleculeRadius / radius;
Vector3D cameraVector = new Vector3D(0, 0, 1);
Vector3D axis = Vector3D.CrossProduct(center, cameraVector);
double angle = Vector3D.AngleBetween(center, cameraVector);
PdbViewState pdbViewState = new PdbViewState();
pdbViewState.Scale = scale;
pdbViewState.Translation = -center * this.scaleTransform.ScaleX;
if (axis.LengthSquared > 0)
{
pdbViewState.Rotation = new Quaternion(axis, angle);
}
return(pdbViewState);
}
/// <summary>
/// Gets the current <see cref="ViewState"/> of the control instance.
/// </summary>
/// <returns>The current <see cref="PdbViewState"/>.</returns>
internal PdbViewState GetViewState()
{
PdbViewState viewState = new PdbViewState();
viewState.Translation = new Vector3D(this.translateTransform.OffsetX,
this.translateTransform.OffsetY, this.translateTransform.OffsetZ);
viewState.Rotation = ((QuaternionRotation3D)this.rotateTransform.Rotation).Quaternion;
viewState.Scale = this.scaleTransform.ScaleX;
viewState.Clip = this.clip;
viewState.Slab = this.slab;
return(viewState);
}
/// <summary>
/// Creates the tween of the instance and the specified end ViewState.
/// </summary>
/// <param name="endViewState">End <see cref="ViewState"/> of the tween.</param>
/// <param name="t">The interpolation coefficient.</param>
/// <returns>
/// A <see cref="ViewState"/> representing the tween of this instance and the specifed end ViewState.
/// </returns>
protected override ViewState CreateTween(ViewState endViewState, double t)
{
PdbViewState tweenViewState = new PdbViewState();
PdbViewState otherViewState = endViewState as PdbViewState;
if (otherViewState != null)
{
tweenViewState.translation = this.translation +
t * (otherViewState.translation - this.translation);
tweenViewState.scale = this.scale + t * (otherViewState.scale - this.scale);
tweenViewState.clip = this.clip + t * (otherViewState.clip - this.clip);
tweenViewState.slab = this.slab + t * (otherViewState.slab - this.slab);
tweenViewState.rotation = Quaternion.Slerp(
this.rotation, otherViewState.rotation, t);
}
return(tweenViewState);
}
/// <summary>
/// Sets all camera and transform settings based on the specified <see cref="PdbViewState"/>.
/// </summary>
/// <param name="pdbViewState">The new state of the view.</param>
internal void SetViewState(PdbViewState pdbViewState)
{
this.translateTransform.OffsetX = pdbViewState.Translation.X;
this.translateTransform.OffsetY = pdbViewState.Translation.Y;
this.translateTransform.OffsetZ = pdbViewState.Translation.Z;
this.scaleTransform.ScaleX = pdbViewState.Scale;
this.scaleTransform.ScaleY = pdbViewState.Scale;
this.scaleTransform.ScaleZ = pdbViewState.Scale;
QuaternionRotation3D rotation =
(QuaternionRotation3D)this.rotateTransform.Rotation;
rotation.Quaternion = pdbViewState.Rotation;
this.clip = pdbViewState.Clip;
this.slab = pdbViewState.Slab;
this.UpdateClipping();
}
/// <summary>
/// Sets all camera and transform settings based on the specified <see cref="PdbViewState"/>.
/// </summary>
/// <param name="pdbViewState">The new state of the view.</param>
internal void SetViewState(PdbViewState pdbViewState)
{
this.translateTransform.OffsetX = pdbViewState.Translation.X;
this.translateTransform.OffsetY = pdbViewState.Translation.Y;
this.translateTransform.OffsetZ = pdbViewState.Translation.Z;
this.scaleTransform.ScaleX = pdbViewState.Scale;
this.scaleTransform.ScaleY = pdbViewState.Scale;
this.scaleTransform.ScaleZ = pdbViewState.Scale;
QuaternionRotation3D rotation =
(QuaternionRotation3D)this.rotateTransform.Rotation;
rotation.Quaternion = pdbViewState.Rotation;
this.clip = pdbViewState.Clip;
this.slab = pdbViewState.Slab;
this.UpdateClipping();
}
/// <summary>
/// Gets the current <see cref="ViewState"/> of the control instance.
/// </summary>
/// <returns>The current <see cref="PdbViewState"/>.</returns>
internal PdbViewState GetViewState()
{
PdbViewState viewState = new PdbViewState();
viewState.Translation = new Vector3D(this.translateTransform.OffsetX,
this.translateTransform.OffsetY, this.translateTransform.OffsetZ);
viewState.Rotation = ((QuaternionRotation3D)this.rotateTransform.Rotation).Quaternion;
viewState.Scale = this.scaleTransform.ScaleX;
viewState.Clip = this.clip;
viewState.Slab = this.slab;
return viewState;
}
/// <summary>
/// Calculates a decent orientation of the molecule based on the bounding box of the
/// currently selected atoms. Used for animating to the center of a selection.
/// </summary>
/// <returns>The generated view state representing the desired orientation.</returns>
internal PdbViewState GetSelectionViewState()
{
Vector3D center = new Vector3D();
foreach (Atom atom in this.SelectedAtoms)
{
center.X += atom.Position.X;
center.Y += atom.Position.Y;
center.Z += atom.Position.Z;
}
center.X /= this.SelectedAtoms.Count;
center.Y /= this.SelectedAtoms.Count;
center.Z /= this.SelectedAtoms.Count;
double radius = 16;
foreach (Atom atom in this.SelectedAtoms)
{
Vector3D vector = new Vector3D(atom.Position.X - center.X,
atom.Position.Y - center.Y, atom.Position.Z - center.Z);
radius = Math.Max(radius, vector.LengthSquared);
}
radius = Math.Sqrt(radius);
center.X += this.translateTransform.OffsetX;
center.Y += this.translateTransform.OffsetY;
center.Z += this.translateTransform.OffsetZ;
double moleculeRadius = 1.25 / this.scaleTransform.ScaleX;
double scale = 0.8 * moleculeRadius / radius;
Vector3D cameraVector = new Vector3D(0, 0, 1);
Vector3D axis = Vector3D.CrossProduct(center, cameraVector);
double angle = Vector3D.AngleBetween(center, cameraVector);
PdbViewState pdbViewState = new PdbViewState();
pdbViewState.Scale = scale;
pdbViewState.Translation = -center * this.scaleTransform.ScaleX;
if (axis.LengthSquared > 0)
pdbViewState.Rotation = new Quaternion(axis, angle);
return pdbViewState;
}
/// <summary>
/// Creates the tween of the instance and the specified end ViewState.
/// </summary>
/// <param name="endViewState">End <see cref="ViewState"/> of the tween.</param>
/// <param name="t">The interpolation coefficient.</param>
/// <returns>
/// A <see cref="ViewState"/> representing the tween of this instance and the specifed end ViewState.
/// </returns>
protected override ViewState CreateTween(ViewState endViewState, double t)
{
PdbViewState tweenViewState = new PdbViewState();
PdbViewState otherViewState = endViewState as PdbViewState;
if (otherViewState != null)
{
tweenViewState.translation = this.translation +
t * (otherViewState.translation - this.translation);
tweenViewState.scale = this.scale + t * (otherViewState.scale - this.scale);
tweenViewState.clip = this.clip + t * (otherViewState.clip - this.clip);
tweenViewState.slab = this.slab + t * (otherViewState.slab - this.slab);
tweenViewState.rotation = Quaternion.Slerp(
this.rotation, otherViewState.rotation, t);
}
return tweenViewState;
}
