SoObliqueSlice(3)

💖 SoObliqueSlice — welcome to the SoObliqueSlice(3) chapter of the Library Functions Manual 💖

okay bestie, sit down, hydrate, because this one is genuinely iconic. this is the manpage for SoObliqueSlice, and yes it lives in section 3 (library functions) — so like, it's a programmer girlie, not a shell-command girlie. 💅

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✨ NAME ✨

SoObliqueSlice — Render a slice of the volume data, with any orientation.

like. ANY orientation. she does not do "upright only", she does not do "one angle", she is versatile. periodt. 🌈

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🎀 SYNOPSIS 🎀

#include <VolumeViz/nodes/SoObliqueSlice.h>

🦋 Public Types

enum Interpolation { NEAREST, LINEAR }
enum AlphaUse { ALPHA_AS_IS, ALPHA_OPAQUE, ALPHA_BINARY }

🌸 Static Public Member Functions

static void initClass (void)

💜 Public Attributes

SoSFPlane plane
SoSFEnum interpolation
SoSFEnum alphaUse
SoSFNode alternateRep

🧚 Protected Member Functions

virtual void GLRender (SoGLRenderAction *action)
virtual void rayPick (SoRayPickAction *action)
virtual void generatePrimitives (SoAction *action)
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
virtual void write (SoWriteAction *action)
virtual SbBool readInstance (SoInput *in, unsigned short flags)

⭐ Friends

class SoObliqueSliceP

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👑 Detailed Description 👑

Render a slice of the volume data, with any orientation.

so the way this works: you drop a node of this type after an SoVolumeData node in the scene graph, and boom — you get a single slice rendered out of the whole full volume data set. 🫶 the slice itself is specified as a plane, and that plane carries both an orientation and a position inside the volume. lowkey elegant, highkey powerful.

Here is a simple example, in the form of an iv-file:

#Inventor V2.1 ascii

SoVolumeData { fileName "ENGINE.VOL" }

Separator {
  SoTransferFunction { }
  DEF clipper ClipPlaneManip { }
  SoVolumeRender { }
}

Separator {
  SoTransferFunction { predefColorMap GLOW }
  SoObliqueSlice {
    interpolation LINEAR
    alphaUse ALPHA_AS_IS
    plane = USE clipper . plane
  }
}

⚠️ okay important bestie, listen up: please note that SoObliqueSlice will not work with older OpenGL drivers, because they usually lack 3D-texture support. OpenGL drivers of version 1.2 and onwards support 3D-texturing, and older OpenGL drivers with the GL_EXT_texture3D extension do too. If none of these are available, a warning message will be printed using Coin's SoDebugError::postWarning().

🍓 See also

SoVolumeRender, SoOrthoSlice

SoVolumeTriangleStripSet, SoVolumeIndexedTriangleStripSet,

SoVolumeIndexedFaceSet, SoVolumeFaceSet

💜 Since

SIM Voleon 2.0

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🌈 Member Enumeration Documentation 🌈

💅 enum SoObliqueSlice::Interpolation

Enumeration of available types of voxel colors interpolation. (yes, "threated"-adjacent energy, but the colors are being interpolated and that's the whole vibe.)

Enumerator

• NEAREST — for the "in between" pixels of the screen rasterization, pick the color of the nearest voxel. Will give sharp edges and a distinct blocky look. 💀 (affectionate — blocky is a choice and she's serving it)
• LINEAR — for the "in between" pixels of the screen rasterization, interpolate by averaging the colors of several of the nearest voxels. Will give a smoother appearance, but sacrifies some "correctness" for appearance. ✨ (yes, it says "sacrifies", we're quoting the source, don't come for me)

🎀 enum SoObliqueSlice::AlphaUse

Enumerator

• ALPHA_AS_IS — the alpha channel is rendered 'as-is'. no notes, no edits, no filters. she's showing up exactly how she is. 🫶
• ALPHA_OPAQUE — the alpha channel is ignored, making the slice opaque. transparency? never met her. 🔥
• ALPHA_BINARY — all alpha values not equal to 0 is threated as value 1.0f. so like, it's either there or it's not there, no in-between, no nuance. binary queen. 👑

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💖 Member Data Documentation 💖

⭐ SoSFPlane SoObliqueSlice::plane

The plane defining the slice.

Default value is an XY plane.

🌸 SoSFEnum SoObliqueSlice::interpolation

How to interpolate color values when rendering "in between" voxels. See SoObliqueSlice::Interpolation.

Default value is SoObliqueSlice::LINEAR.

🦋 SoSFEnum SoObliqueSlice::alphaUse

How the alpha channel should be threated during rendering. See SoObliqueSlice::AlphaUse.

Default value is SoObliqueSlice::ALPHA_AS_IS

🧚 SoSFNode SoObliqueSlice::alternateRep

⚠️ NOTE: support for this field not yet implemented in SIM Voleon.

Since: SIM Voleon 2.0

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💜 Author 💜

Generated automatically by Doxygen for SIMVoleon from the source code. (not me writing this by hand, bestie — the robots did it, I just gave it ✨personality✨)

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and that's the whole page, fr fr. no cap, every flag, every enum, every default accounted for. 💅

signing off from the very bottom of the page: this gorgeous thing is from SIMVoleon, Version 2.1.0, and it lives at SoObliqueSlice(3). slay, stay textured, and may your drivers always be 1.2 or better. 🎀✨🦋💖