man SbCylinder (Fonctions bibliothèques) -

NAME

SbCylinder -

SYNOPSIS

#include <Inventor/SbLinear.h>

Detailed Description

The SbCylinder class is a representation of a cylinder.

This class is used within other classes in Coin. It contains data to represent a cylinder by an axis and a radius. The cylinder has no length/height value, which means it is treated as of infinite length.

See also: SbLine, SbSphere

Public Member Functions

SbCylinder (void)

SbCylinder (const SbLine &a, const float r)

void setValue (const SbLine &a, const float r)

void setAxis (const SbLine &a)

void setRadius (const float r)

const SbLine & getAxis (void) const

float getRadius (void) const

SbBool intersect (const SbLine &l, SbVec3f &intersection) const

SbBool intersect (const SbLine &l, SbVec3f &enter, SbVec3f &exit) const

void print (FILE *file) const

Constructor & Destructor Documentation

SbCylinder::SbCylinder (void)

The default constructor will make a cylinder of radius 1, center axis going through origo in the parallel direction of the positive y-axis.

SbCylinder::SbCylinder (const SbLine & a, const float r)

Construct and initialize an SbCylinder instance with the given axis a and radius r.

Member Function Documentation

void SbCylinder::setValue (const SbLine & a, const float r)

Set the axis and radius of the cylinder.

See also: getAxis(), getRadius().

void SbCylinder::setAxis (const SbLine & a)

Set the center axis of the cylinder.

See also: setRadius(), getAxis().

void SbCylinder::setRadius (const float r)

Set the radius of the cylinder.

See also: setAxis(), getRadius().

const SbLine & SbCylinder::getAxis (void) const

Return the line which is the center axis of the cylinder.

See also: setAxis(), getRadius().

float SbCylinder::getRadius (void) const

Return radius of cylinder.

See also: setRadius(), getAxis().

SbBool SbCylinder::intersect (const SbLine & l, SbVec3f & intersection) const

Finds the intersection point of the ray l on the cylinder where the ray enters, and return this point in intersection.

If the ray does not intersect the cylinder, FALSE is returned, otherwise we will return TRUE.

SbBool SbCylinder::intersect (const SbLine & l, SbVec3f & enter, SbVec3f & exit) const

Find the intersection points of the ray l on the cylinder and return these in enter and exit. If the ray just 'grazes' the cylinder, the enter and exit points have equal values.