A subclass of Spline that keeps the rotation field of a PhysicsFrame normalized and rotating the short direction. More...

Inherits G3D::Spline< PhysicsFrame >.

Public Member Functions
	PhysicsFrameSpline ()

	PhysicsFrameSpline (const Any &any)
	Accepts a table of properties, or any valid PhysicsFrame specification for a single control.

void	append (float t, const PhysicsFrame &c)
	Appends a control point at a specific time that must be greater than that of the previous point.

void	append (const PhysicsFrame &c)
	Appends control point spaced in time based on the previous control point, or spaced at unit intervals if this is the first control point.

void	clear ()
	Erases all control points and times, but retains the state of cyclic and finalInterval.

void	computeIndex (float s, int &i, float &u) const
	Given a time s, finds i and 0 <= u < 1 such that s = time[i] * u + time[i + 1] * (1 - u).

virtual void	correct (PhysicsFrame &frame) const
	Normalize or otherwise adjust this interpolated Control.

float	duration () const
	Returns the amount of time covered by this spline in one period.

virtual void	ensureShortestPath (PhysicsFrame *A, int N) const
	Mutates the array of N control points that begins at A.

PhysicsFrame	evaluate (float s) const
	Return the position at time s.

void	getControl (int i, float &t, PhysicsFrame &c) const
	Returns the requested control point and time sample based on array index.

float	getFinalInterval () const
	See specification for Spline::finalInterval; this handles the non-positive case.

bool	operator!= (const PhysicsFrameSpline &a) const

PhysicsFrameSpline &	operator= (const Any &any)
	Clear and then reset all values from the any.

bool	operator== (const PhysicsFrameSpline &a) const

int	size () const
	Number of control points.

Any	toAny () const

Static Public Member Functions
static Matrix4	computeBasis ()
	Computes the derivative spline basis from the control point version.

Public Attributes
Array< PhysicsFrame >	control
	Control points.

bool	cyclic
	If cyclic, then the control points will be assumed to wrap around.

float	finalInterval
	For a cyclic spline, this is the time elapsed between the last control point and the first.

Array< float >	time
	Times at which control points occur.

Protected Member Functions
void	computeIndexInBounds (float s, int &i, float &u) const
	Assumes that t0 <= s < tn.

void	getControls (int i, float T, PhysicsFrame A, int N) const
	Returns a series of N control points and times, fixing boundary issues.

Protected Attributes
PhysicsFrame	zero
	The additive identity control point.

Detailed Description

A subclass of Spline that keeps the rotation field of a PhysicsFrame normalized and rotating the short direction.

See Also: UprightFrameSpline

Constructor & Destructor Documentation

G3D::PhysicsFrameSpline::PhysicsFrameSpline ( )

G3D::PhysicsFrameSpline::PhysicsFrameSpline ( const Any & any )

Accepts a table of properties, or any valid PhysicsFrame specification for a single control.

Member Function Documentation

void G3D::Spline< PhysicsFrame >::append	(	float	t,
		const PhysicsFrame &	c
	)

inlineinherited

Appends a control point at a specific time that must be greater than that of the previous point.

void G3D::Spline< PhysicsFrame >::append ( const PhysicsFrame & c )

inlineinherited

Appends control point spaced in time based on the previous control point, or spaced at unit intervals if this is the first control point.

void G3D::Spline< PhysicsFrame >::clear ( )

inlineinherited

Erases all control points and times, but retains the state of cyclic and finalInterval.

static Matrix4 G3D::SplineBase::computeBasis ( )

staticinherited

Computes the derivative spline basis from the control point version.

Referenced by G3D::Spline< UprightFrame >::evaluate().

void G3D::SplineBase::computeIndex	(	float	s,
		int &	i,
		float &	u
	)		const

inherited

Given a time s, finds i and 0 <= u < 1 such that s = time[i] * u + time[i + 1] * (1 - u).

Note that i may be outside the bounds of the time and control arrays; use getControl to handle wraparound and extrapolation issues.

This function takes expected O(1) time for control points with uniform time sampled control points or for uniformly distributed random time samples, but may take O( log time.size() ) time in the worst case.

Called from evaluate().

Referenced by G3D::Spline< UprightFrame >::evaluate().

void G3D::SplineBase::computeIndexInBounds	(	float	s,
		int &	i,
		float &	u
	)		const

protectedinherited

Assumes that t0 <= s < tn.

called by computeIndex.

virtual void G3D::PhysicsFrameSpline::correct ( PhysicsFrame & A ) const

virtual

Normalize or otherwise adjust this interpolated Control.

Reimplemented from G3D::Spline< PhysicsFrame >.

float G3D::SplineBase::duration ( ) const

inherited

Returns the amount of time covered by this spline in one period.

For a cyclic spline, this contains the final interval.

Referenced by G3D::Spline< UprightFrame >::getControl().

virtual void G3D::PhysicsFrameSpline::ensureShortestPath	(	PhysicsFrame *	A,
		int	N
	)		const

virtual

Mutates the array of N control points that begins at A.

It is useful to override this method by one that wraps the values if they are angles or quaternions for which "shortest path" interpolation is significant.

Reimplemented from G3D::Spline< PhysicsFrame >.

PhysicsFrame G3D::Spline< PhysicsFrame >::evaluate ( float s ) const

inlineinherited

Return the position at time s.

The spline is defined outside of the time samples by extrapolation or cycling.

void G3D::Spline< PhysicsFrame >::getControl	(	int	i,
		float &	t,
		PhysicsFrame &	c
	)		const

inlineinherited

Returns the requested control point and time sample based on array index.

If the array index is out of bounds, wraps (for a cyclic spline) or linearly extrapolates (for a non-cyclic spline), assuming time intervals follow the first or last sample recorded.

Calls correct() on the control point if it was extrapolated.

Returns 0 if there are no control points.

See Also: Spline::control and Spline::time for the underlying control point array; Spline::computeIndex to find the index given a time.

void G3D::Spline< PhysicsFrame >::getControls	(	int	i,
		float *	T,
		PhysicsFrame *	A,
		int	N
	)		const

inlineprotectedinherited

Returns a series of N control points and times, fixing boundary issues.

The indices may be assumed to be treated cyclically.

float G3D::SplineBase::getFinalInterval ( ) const

inherited

See specification for Spline::finalInterval; this handles the non-positive case.

Returns 0 if not cyclic.

bool G3D::PhysicsFrameSpline::operator!= ( const PhysicsFrameSpline & a ) const

inline

PhysicsFrameSpline& G3D::PhysicsFrameSpline::operator= ( const Any & any )

Clear and then reset all values from the any.

bool G3D::PhysicsFrameSpline::operator== ( const PhysicsFrameSpline & a ) const

int G3D::Spline< PhysicsFrame >::size ( ) const

inlineinherited

Number of control points.

Any G3D::PhysicsFrameSpline::toAny ( ) const

Member Data Documentation

Array<PhysicsFrame > G3D::Spline< PhysicsFrame >::control

inherited

Control points.

Must have the same number of elements as Spline::time.

bool G3D::SplineBase::cyclic

inherited

If cyclic, then the control points will be assumed to wrap around.

If not cyclic, then the tangents at the ends of the spline point to the final control points.

Referenced by G3D::UprightSplineManipulator::cyclic(), G3D::Spline< UprightFrame >::getControl(), and G3D::UprightSplineManipulator::setCyclic().

float G3D::SplineBase::finalInterval

inherited

For a cyclic spline, this is the time elapsed between the last control point and the first.

If less than or equal to zero this is assumed to be:

(time[0] - time[1] + . time[time.size() - 1] - time[time.size() - 2]) / 2.

Array<float> G3D::SplineBase::time

inherited

Times at which control points occur.

Must have the same number of elements as Spline::control.

Referenced by G3D::Spline< UprightFrame >::append(), G3D::Spline< UprightFrame >::clear(), G3D::Spline< UprightFrame >::evaluate(), G3D::Spline< UprightFrame >::getControl(), and G3D::Spline< UprightFrame >::size().

PhysicsFrame G3D::Spline< PhysicsFrame >::zero

protectedinherited

The additive identity control point.

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation