class AttachmentContour2DConstraint : public Constraint

a class corresponding to a force constraint where a spring force is added on a vertex attached to a fixed point

Inheritance:

Public Classes

class

MissingVertex : public Exception Exception thrown when no vertex is given to create an attachment constraint

Public Methods

virtual void	apply () the apply fonction that adds an external force to the vertex
double	getStiffness () const returns the stiffness of the spring force
Vec2	getFixedPosition () const returns the position where the vertex is fixed
ActiveVertexContour2D*	getVertex () const returns the vertex where the constraint is applied
void	setStiffness (const double s) sets the stiffness of the spring force
void	setFixedPosition (const Vec2 &p) sets the maximum distance between two vertices

Public

	constructor AttachmentContour2DConstraint (const Vec2 &p, const double s, ActiveVertexContour2D *v) throw(MissingVertex) create an attachment constraint
	destructor virtual ~AttachmentContour2DConstraint (void) empty destructor

Private Fields

Vec2	position the position where the vertex is attached
double	stiffness the stiffness of the spring
ActiveVertexContour2D*	vertex the ActiveVertex2D that is attached to a fixed point

class MissingVertex: public Exception

Exception thrown when no vertex is given to create an attachment constraint

Vec2 position

the position where the vertex is attached

double stiffness

the stiffness of the spring

ActiveVertexContour2D* vertex

the ActiveVertex2D that is attached to a fixed point

virtual void apply()

the apply fonction that adds an external force to the vertex

double getStiffness() const

returns the stiffness of the spring force

Vec2 getFixedPosition() const

returns the position where the vertex is fixed

ActiveVertexContour2D* getVertex() const

returns the vertex where the constraint is applied

void setStiffness(const double s)

sets the stiffness of the spring force

void setFixedPosition(const Vec2 &p)

sets the maximum distance between two vertices

constructor

AttachmentContour2DConstraint(const Vec2 &p, const double s, ActiveVertexContour2D *v) throw(MissingVertex)

create an attachment constraint

Throws:

MissingVertex thrown when v is NULL

Parameters:

p - the 2D position to attract the vertex
s - the stiffness parameter (between 0.0 and 1.0) used to compute the attracting force
v - the vertex on which the constraint applies

destructor

virtual ~AttachmentContour2DConstraint(void)

empty destructor

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(c)opyright by Malte Zöckler, Roland Wunderling
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