---
name: "SbCylinderSheetProjector"
section: "3"
platform: "linux"
package: "coin"
version: "1:4.0.10-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/SbCylinderSheetProjector"
---

# SbCylinderSheetProjector(3)

The SbCylinderSheetProjector class projects 2D points to 3D points on a sheet covering a cylindrical shape.

## NAME

SbCylinderSheetProjector - The **SbCylinderSheetProjector** class projects 2D points to 3D points on a sheet covering a cylindrical shape.

## SYNOPSIS

\#include \<Inventor/projectors/SbCylinderSheetProjector.h\>

Inherits **SbCylinderProjector**.

### Public Member Functions

**SbCylinderSheetProjector** (const SbBool orienttoeye=TRUE)\
 **SbCylinderSheetProjector** (const **SbCylinder** &cyl, const SbBool orienttoeye=TRUE)\
 virtual **SbProjector** \* **copy** (void) const\
 virtual **SbVec3f** **project** (const **SbVec2f** &point)\
 virtual **SbRotation** **getRotation** (const **SbVec3f** &point1, const **SbVec3f** &point2)\

Public Member Functions inherited from **SbCylinderProjector** **SbVec3f** **projectAndGetRotation** (const **SbVec2f** &point, **SbRotation** &rot)\
 void **setCylinder** (const **SbCylinder** &cyl)\
 const **SbCylinder** & **getCylinder** (void) const\
 void **setOrientToEye** (const SbBool orienttoeye)\
 SbBool **isOrientToEye** (void) const\
 void **setFront** (const SbBool infront)\
 SbBool **isFront** (void) const\
 SbBool **isPointInFront** (const **SbVec3f** &point) const\
 virtual void **setWorkingSpace** (const **SbMatrix** &space)\

Public Member Functions inherited from **SbProjector** virtual void **setViewVolume** (const **SbViewVolume** &vol)\
 const **SbViewVolume** & **getViewVolume** (void) const\
 const **SbMatrix** & **getWorkingSpace** (void) const\
 virtual SbBool **tryProject** (const **SbVec2f** &point, const float epsilon, **SbVec3f** &result)\

### Protected Member Functions

virtual void **setupPlane** (void)\

Protected Member Functions inherited from **SbCylinderProjector** **SbCylinderProjector** (const SbBool orienttoeye)\
 **SbCylinderProjector** (const **SbCylinder** &**cylinder**, const SbBool orienttoeye)\
 SbBool **intersectCylinderFront** (const **SbLine** &line, **SbVec3f** &result)\

Protected Member Functions inherited from **SbProjector** **SbProjector** (void)\
 virtual **~SbProjector** ()\
 **SbLine** **getWorkingLine** (const **SbVec2f** &point) const\
 float **findVanishingDistance** (void) const\
 SbBool **verifyProjection** (const **SbVec3f** &projpt) const\

### Protected Attributes

**SbVec3f** **workingProjPoint**\
 **SbVec3f** **planeDir**\
 **SbPlane** **tolPlane**\

Protected Attributes inherited from **SbCylinderProjector** SbBool **intersectFront**\
 **SbCylinder** **cylinder**\
 SbBool **orientToEye**\
 SbBool **needSetup**\
 **SbVec3f** **lastPoint**\

Protected Attributes inherited from **SbProjector** **SbViewVolume** **viewVol**\
 **SbMatrix** **worldToWorking**\
 **SbMatrix** **workingToWorld**\

## Detailed Description

The **SbCylinderSheetProjector** class projects 2D points to 3D points on a sheet covering a cylindrical shape.

## Constructor & Destructor Documentation

### SbCylinderSheetProjector::SbCylinderSheetProjector (const SbBool orienttoeye = TRUE)

Constructor. Uses default cylinder definition, see **SbCylinderProjector::SbCylinderProjector()**.

*orienttoeye* decides whether or not the cylinder and sheet should always be oriented towards the viewer.

### SbCylinderSheetProjector::SbCylinderSheetProjector (const SbCylinder & cyl, const SbBool orienttoeye = TRUE)

Constructor with explicit definition of projection cylinder.

## Member Function Documentation

### SbProjector \* SbCylinderSheetProjector::copy (void ) const \[virtual\]

Construct and return a copy of this projector. The caller is responsible for destructing the new instance.

**Note that if the Coin library has been built as a DLL under Microsoft Windows and you use this method from application code, you** *must* **make sure that both the Coin DLL and the application executable are using the same instance of a C Run-Time (CRT) library. Otherwise, you** *will* **get memory heap corruption upon deallocating the returned instances, eventually leading to mysterious crashes.**\

*Implements* **SbProjector***.*

### SbVec3f SbCylinderSheetProjector::project (const SbVec2f & point) \[virtual\]

*Project the 2D point from normalized viewport coordinates to a 3D point. The mapping will be done in accordance with the type of the projector.*

*Implements* **SbCylinderProjector***.*

### SbRotation SbCylinderSheetProjector::getRotation (const SbVec3f & point1, const SbVec3f & point2) \[virtual\]

*Returns rotation on the projection surface which reorients point1 to point2.*

*Implements* **SbCylinderProjector***.*

### void SbCylinderSheetProjector::setupPlane (void ) \[protected\], \[virtual\]

*Recalculates projection surface settings after changes to the parameters.*

## Member Data Documentation

### SbVec3f SbCylinderSheetProjector::workingProjPoint \[protected\]

*Last projected point, in the working space coordinate system.*

### SbVec3f SbCylinderSheetProjector::planeDir \[protected\]

*Normal vector of the plane defining the orientation of the sheet.*

### SbPlane SbCylinderSheetProjector::tolPlane \[protected\]

*The tolerance value specifying how much of the cylinder is "above" the sheet.*

## Author

*Generated automatically by Doxygen for Coin from the source code.*