SbCylinder - Online Linux Manual Page

Section : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin

NAME

SbCylinder − The SbCylinder

class is a representation of a cylinder.

SYNOPSIS

#include <Inventor/SbLinear​.h>

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

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

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.

References setValue().

SbCylinder::SbCylinder (const SbLine

& a, const float r)

Construct and initialize an SbCylinder

instance with the given axis

a

and radius

r

.

References setValue().

Member Function Documentation

void SbCylinder::setValue (const SbLine

& a, const float r)

Set the axis and radius of the cylinder.

See also

getAxis(

)

,

getRadius(

)

.

References setAxis(), and setRadius().

Referenced by SbCylinder().

void SbCylinder::setAxis (const SbLine

& a)

Set the center axis of the cylinder.

See also

setRadius(

)

,

getAxis(

)

.

References SbLine::getDirection(), SbVec3f::length(), and SoDebugError::postWarning().

Referenced by setValue().

void SbCylinder::setRadius (const float r)

Set the radius of the cylinder.

See also

setAxis(

)

,

getRadius(

)

.

References SoDebugError::postWarning().

Referenced by setValue().

const SbLine

& SbCylinder::getAxis (void) const

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

See also

setAxis(

)

,

getRadius(

)

.

Referenced by SbCylinderPlaneProjector::getRotation(), SbCylinderSectionProjector::getRotation(), SbCylinderSheetProjector::getRotation(), SbCylinderProjector::isPointInFront(), print(), SbCylinderSheetProjector::setupPlane(), and SbCylinderSectionProjector::setupTolerance().

float SbCylinder::getRadius (void) const

Return radius of cylinder.

See also

setRadius(

)

,

getAxis(

)

.

Referenced by SbCylinderPlaneProjector::getRotation(), print(), and SbCylinderSectionProjector::setupTolerance().

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

.

Referenced by SbCylinderPlaneProjector::getRotation(), SbCylinderProjector::intersectCylinderFront(), and SbCylinderSectionProjector::project().

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.

If the ray does not intersect the cylinder, FALSE

is returned, otherwise we will return

TRUE

.

References SbVec3f::cross(), SbVec3f::dot(), SbLine::getClosestPoint(), SbLine::getDirection(), SbLine::getPosition(), SbVec3f::length(), SbVec3f::normalize(), and SoDebugError::postWarning().

void SbCylinder::print (FILE * fp) const

Dump the state of this object to the file

stream. Only works in debug version of library, method does nothing in an optimized compile.

References getAxis(), getRadius(), and SbLine::print().

Author

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