SbCylinder...nProjector(3)

🎀 SbCylinderSectionProjector — the NAME section, bestie 💖

okay so. <SbCylinderSectionProjector> is a Library Functions Manual page (section 3, we love a library function), and it's all about the projector that takes your lil 2D points and yeets them onto a sliced cylinder. iconic behavior honestly.

✨ SYNOPSIS ✨

#include <Inventor/projectors/SbCylinderSectionProjector.h>

• Inherits SbCylinderProjector. family tree moment 🌳
• Inherited by SbCylinderPlaneProjector. it's giving legacy 👑

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🌸 Public Member Functions 🌸

• SbCylinderSectionProjector(const float edgetol=0.9f, const SbBool orienttoeye=TRUE) — default constructor energy
• SbCylinderSectionProjector(const SbCylinder &cyl, const float edgetol=0.9f, const SbBool orienttoeye=TRUE) — same but you hand it a cylinder
• virtual SbProjector * copy(void) const — clone it, no cap
• virtual SbVec3f project(const SbVec2f &point) — 2D point in, 3D point out
• virtual SbRotation getRotation(const SbVec3f &point1, const SbVec3f &point2) — the rotation that re-orients one point to the other
• void setTolerance(const float edgetol) — set the edge tolerance
• float getTolerance(void) const — read the edge tolerance
• SbBool isWithinTolerance(const SbVec3f &point) — vibe check: is this point on the usable part?

🌈 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)

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💜 Protected Member Functions 💜

• virtual void setupTolerance(void) — recalc the internals, lowkey important

🧚 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

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🍓 Protected Attributes 🍓

• float tolerance
• float tolDist
• SbVec3f planeDir
• SbLine planeLine
• float planeDist
• 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

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🔥 Detailed Description 🔥

The SbCylinderSectionProjector projects 2D points to a sliced cylinder. periodt.

So here's the tea: the projection cylinder for this class is sliced by a clipping plane parallel to its height axis. Projections get mapped to the remaining cylinder part. not all of it, just the surviving slice 🍰

See also

• SbSphereSectionProjector

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🧸 Constructor & Destructor Documentation 🧸

SbCylinderSectionProjector::SbCylinderSectionProjector(const float edgetol = 0.9f, const SbBool orienttoeye = TRUE)

Default constructor, bestie. See SbCylinderProjector::SbCylinderProjector().

The edgetol value should be within <0, 1], and it specifies how much of the cylinder is used as a projection surface. 1.0 means the full front half is used. yes, the whole front half. main character behavior 💅

SbCylinderSectionProjector::SbCylinderSectionProjector(const SbCylinder & cyl, const float edgetol = 0.9f, const SbBool orienttoeye = TRUE)

Constructor with explicit setting of the projection cylinder. you bring your own cylinder, we do the rest 🎀

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👑 Member Function Documentation 👑

SbProjector * SbCylinderSectionProjector::copy(void ) const [virtual]

Construct and return a copy of this projector. The caller is responsible for destructing the new instance. so like, you have to clean up after yourself, fr fr 🧹

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 is 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.

that's not a vibe, that's a jumpscare 💀

• Implements SbProjector.
• Reimplemented in SbCylinderPlaneProjector.

SbVec3f SbCylinderSectionProjector::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. normalized coords in, 3D coords out, slay ✨

• Implements SbCylinderProjector.
• Reimplemented in SbCylinderPlaneProjector.

SbRotation SbCylinderSectionProjector::getRotation(const SbVec3f & point1, const SbVec3f & point2) [virtual]

Returns rotation on the projection surface which re-orients point1 to point2. it literally spins one point into the other, obsessed 🌸

• Implements SbCylinderProjector.
• Reimplemented in SbCylinderPlaneProjector.

void SbCylinderSectionProjector::setTolerance(const float edgetol)

The edgetol value decides how much of the surface of the cylinder is used for projection. 1.0 means the full cylinder half is used. dial it up, dial it down, you're in control 💅

float SbCylinderSectionProjector::getTolerance(void ) const

Returns edge tolerance for the cylinder half. read-only queen 👑

SbBool SbCylinderSectionProjector::isWithinTolerance(const SbVec3f & point)

Check if point is within the part of the cylinder used for projections. yes/no, in/out, simple as that 🦋

void SbCylinderSectionProjector::setupTolerance(void ) [protected], [virtual]

Recalculate the internal projection surface settings. Needs to be done if any of the parameters influencing the projection surface have been changed from subclasses without using the access methods. iykyk — if you went around the access methods, you gotta come back and fix the internals yourself 🙈

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💎 Member Data Documentation 💎

• float SbCylinderSectionProjector::tolerance [protected] — Tolerance value, deciding how much of the half-cylinder to do projections against.
• float SbCylinderSectionProjector::tolDist [protected] — Tolerance value multiplied with the cylinder radius. math moment 🔢
• SbVec3f SbCylinderSectionProjector::planeDir [protected] — Direction of cutting plane.
• SbLine SbCylinderSectionProjector::planeLine [protected] — A line within the plane which is parallel to the cylinder axis.
• float SbCylinderSectionProjector::planeDist [protected] — Distance from plane to cylinder axis.
• SbPlane SbCylinderSectionProjector::tolPlane [protected] — Defines the plane cutting the cylinder into a projection part. the slice-maker 🍰

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✍️ Author ✍️

Generated automatically by Doxygen for Coin from the source code. not a human author, just a robot doing its lil thing 🤖💖

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k that's the whole page bestie, no details skipped, we ate and left no crumbs 💅✨ and for the cute sign-off: this was Coin, Version 3.1.3, bringing you the SbCylinder...nProjector(3) page — go project something cute, mwah 🎀🫶