SoQuadMesh(3)

📦 version 2.5.0, in fedora 43, fedora 44

✨ NAME ✨

SoQuadMesh(3) — bestie, the SoQuadMesh class is literally here to render and optimize a quadrilateral mesh. That's the whole assignment, no cap. 💅

🦋 SYNOPSIS 🦋

#include <Inventor/nodes/SoQuadMesh.h>

Inherits SoNonIndexedShape.

💖 Public Member Functions 💖

  • virtual SoType getTypeId (void) const
  • SoQuadMesh (void)
  • virtual void GLRender (SoGLRenderAction *action)
  • virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
  • virtual SbBool generateDefaultNormals (SoState *state, SoNormalBundle *nb)

✨ Public Member Functions inherited from SoVertexShape ✨

  • virtual void notify (SoNotList *nl)
  • virtual void write (SoWriteAction *action)

🌸 Public Member Functions inherited from SoShape 🌸

  • virtual SbBool affectsState (void) const
  • virtual void getBoundingBox (SoGetBoundingBoxAction *action)
  • virtual void rayPick (SoRayPickAction *action)
  • virtual void callback (SoCallbackAction *action)
  • const SoBoundingBoxCache * getBoundingBoxCache (void) const

🦋 Public Member Functions inherited from SoNode 🦋

  • void setOverride (const SbBool state)
  • SbBool isOverride (void) const
  • void setNodeType (const NodeType type)
  • NodeType getNodeType (void) const
  • virtual SoNode * copy (SbBool copyconnections=0) const
  • virtual void doAction (SoAction *action)
  • virtual void GLRenderBelowPath (SoGLRenderAction *action)
  • virtual void GLRenderInPath (SoGLRenderAction *action)
  • virtual void GLRenderOffPath (SoGLRenderAction *action)
  • virtual void getMatrix (SoGetMatrixAction *action)
  • virtual void handleEvent (SoHandleEventAction *action)
  • virtual void pick (SoPickAction *action)
  • virtual void search (SoSearchAction *action)
  • virtual void audioRender (SoAudioRenderAction *action)
  • virtual void grabEventsSetup (void)
  • virtual void grabEventsCleanup (void)
  • virtual void startNotify (void)
  • uint32_t getNodeId (void) const
  • virtual SoChildList * getChildren (void) const
  • virtual void writeInstance (SoOutput *out)
  • virtual SoNode * addToCopyDict (void) const
  • virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)
  • virtual SoFieldContainer * copyThroughConnection (void) const

💜 Public Member Functions inherited from SoFieldContainer 💜

  • void setToDefaults (void)
  • SbBool hasDefaultValues (void) const
  • SbBool fieldsAreEqual (const SoFieldContainer *container) const
  • void copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=0)
  • SbBool set (const char *const fielddata)
  • void get (SbString &fielddata)
  • virtual int getFields (SoFieldList &l) const
  • virtual int getAllFields (SoFieldList &l) const
  • virtual SoField * getField (const SbName &name) const
  • virtual SoField * getEventIn (const SbName &name) const
  • virtual SoField * getEventOut (const SbName &name) const
  • SbBool getFieldName (const SoField *const field, SbName &name) const
  • SbBool enableNotify (const SbBool flag)
  • SbBool isNotifyEnabled (void) const
  • SbBool set (const char *fielddata, SoInput *in)
  • void get (SbString &fielddata, SoOutput *out)
  • virtual SbBool validateNewFieldValue (SoField *field, void *newval)
  • virtual void addWriteReference (SoOutput *out, SbBool isfromfield=0)
  • SbBool getIsBuiltIn (void) const
  • void setUserData (void *userdata) const
  • void * getUserData (void) const

👑 Public Member Functions inherited from SoBase 👑

  • void ref (void) const
  • void unref (void) const
  • void unrefNoDelete (void) const
  • int32_t getRefCount (void) const
  • void touch (void)
  • SbBool isOfType (SoType type) const
  • virtual SbName getName (void) const
  • virtual void setName (const SbName &newname)
  • void addAuditor (void *const auditor, const SoNotRec::Type type)
  • void removeAuditor (void *const auditor, const SoNotRec::Type type)
  • const SoAuditorList & getAuditors (void) const
  • SbBool shouldWrite (void)
  • void assertAlive (void) const

⭐ Static Public Member Functions ⭐

  • static SoType getClassTypeId (void)
  • static void initClass (void)

🌈 Static Public Member Functions inherited from SoNonIndexedShape 🌈

  • static SoType getClassTypeId (void)
  • static void initClass (void)

💫 Static Public Member Functions inherited from SoVertexShape 💫

  • static SoType getClassTypeId (void)
  • static void initClass (void)

✨ Static Public Member Functions inherited from SoShape ✨

  • static SoType getClassTypeId (void)
  • static void initClass (void)
  • static void getScreenSize (SoState *const state, const SbBox3f &boundingbox, SbVec2s &rectsize)
  • static float getDecimatedComplexity (SoState *state, float complexity)

🦄 Static Public Member Functions inherited from SoNode 🦄

  • static uint32_t getCompatibilityTypes (const SoType &nodetype)
  • static SoType getClassTypeId (void)
  • static SoNode * getByName (const SbName &name)
  • static int getByName (const SbName &name, SoNodeList &l)
  • static void initClass (void)
  • static void initClasses (void)
  • static uint32_t getNextNodeId (void)
  • static int getActionMethodIndex (const SoType type)
  • static void getBoundingBoxS (SoAction *action, SoNode *node)
  • static void GLRenderS (SoAction *action, SoNode *node)
  • static void callbackS (SoAction *action, SoNode *node)
  • static void getMatrixS (SoAction *action, SoNode *node)
  • static void handleEventS (SoAction *action, SoNode *node)
  • static void pickS (SoAction *action, SoNode *node)
  • static void rayPickS (SoAction *action, SoNode *node)
  • static void searchS (SoAction *action, SoNode *node)
  • static void writeS (SoAction *action, SoNode *node)
  • static void audioRenderS (SoAction *action, SoNode *node)
  • static void getPrimitiveCountS (SoAction *action, SoNode *node)

🍓 Static Public Member Functions inherited from SoFieldContainer 🍓

  • static void initClass (void)
  • static SoType getClassTypeId (void)
  • static void initCopyDict (void)
  • static void addCopy (const SoFieldContainer *orig, const SoFieldContainer *copy)
  • static SoFieldContainer * checkCopy (const SoFieldContainer *orig)
  • static SoFieldContainer * findCopy (const SoFieldContainer *orig, const SbBool copyconnections)
  • static void copyDone (void)

💀 Static Public Member Functions inherited from SoBase 💀

  • static void initClass (void)
  • static SoType getClassTypeId (void)
  • static void addName (SoBase *const base, const char *const name)
  • static void removeName (SoBase *const base, const char *const name)
  • static void incrementCurrentWriteCounter (void)
  • static void decrementCurrentWriteCounter (void)
  • static SoBase * getNamedBase (const SbName &name, SoType type)
  • static int getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)
  • static SbBool read (SoInput *in, SoBase *&base, SoType expectedtype)
  • static void setInstancePrefix (const SbString &c)
  • static void setTraceRefs (SbBool trace)
  • static SbBool getTraceRefs (void)
  • static SbBool connectRoute (SoInput *in, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)
  • static SbBool readRoute (SoInput *in)

🎀 Public Attributes 🎀

  • SoSFInt32 verticesPerColumn
  • SoSFInt32 verticesPerRow

🌺 Public Attributes inherited from SoNonIndexedShape 🌺

  • SoSFInt32 startIndex

🌼 Public Attributes inherited from SoVertexShape 🌼

  • SoSFNode vertexProperty

🔥 Protected Member Functions 🔥

  • virtual const SoFieldData * getFieldData (void) const
  • virtual ~SoQuadMesh ()
  • virtual void generatePrimitives (SoAction *action)
  • virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
  • virtual SbBool generateDefaultNormals (SoState *, SoNormalCache *)

💅 Protected Member Functions inherited from SoNonIndexedShape 💅

  • SoNonIndexedShape (void)
  • virtual ~SoNonIndexedShape ()
  • void computeCoordBBox (SoAction *action, int numVertices, SbBox3f &box, SbVec3f &center)
  • void fixNumVerticesPointers (SoState *state, const int32_t *&start, const int32_t *&end, int32_t *dummyarray) const

🌸 Protected Member Functions inherited from SoVertexShape 🌸

  • SoVertexShape (void)
  • virtual ~SoVertexShape ()
  • virtual SbBool shouldGLRender (SoGLRenderAction *action)
  • void setNormalCache (SoState *const state, const int num, const SbVec3f *normals)
  • SoNormalCache * getNormalCache (void) const
  • SoNormalCache * generateAndReadLockNormalCache (SoState *const state)
  • void getVertexData (SoState *state, const SoCoordinateElement *&coords, const SbVec3f *&normals, const SbBool neednormals)
  • void readLockNormalCache (void)
  • void readUnlockNormalCache (void)

🦋 Protected Member Functions inherited from SoShape 🦋

  • SoShape (void)
  • virtual ~SoShape ()
  • float getComplexityValue (SoAction *action)
  • void beginSolidShape (SoGLRenderAction *action)
  • void endSolidShape (SoGLRenderAction *action)
  • void GLRenderBoundingBox (SoGLRenderAction *action)
  • SbBool shouldPrimitiveCount (SoGetPrimitiveCountAction *action)
  • SbBool shouldRayPick (SoRayPickAction *const action)
  • void computeObjectSpaceRay (SoRayPickAction *const action)
  • void computeObjectSpaceRay (SoRayPickAction *const action, const SbMatrix &matrix)
  • virtual SoDetail * createTriangleDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp)
  • virtual SoDetail * createLineSegmentDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, SoPickedPoint *pp)
  • virtual SoDetail * createPointDetail (SoRayPickAction *action, const SoPrimitiveVertex *v, SoPickedPoint *pp)
  • void invokeTriangleCallbacks (SoAction *const action, const SoPrimitiveVertex *const v1, const SoPrimitiveVertex *const v2, const SoPrimitiveVertex *const v3)
  • void invokeLineSegmentCallbacks (SoAction *const action, const SoPrimitiveVertex *const v1, const SoPrimitiveVertex *const v2)
  • void invokePointCallbacks (SoAction *const action, const SoPrimitiveVertex *const v)
  • void beginShape (SoAction *const action, const TriangleShape shapetype, SoDetail *const detail=NULL)
  • void shapeVertex (const SoPrimitiveVertex *const v)
  • void endShape (void)
  • void generateVertex (SoPrimitiveVertex *const pv, const SbVec3f &point, const SbBool useTexFunc, const SoTextureCoordinateElement *const tce, const float s, const float t, const SbVec3f &normal)
  • void generateVertex (SoPrimitiveVertex *const pv, const SbVec3f &point, const SbBool useTexFunc, const SoTextureCoordinateElement *const tce, const float s, const float t, const float r, const SbVec3f &normal)
  • SbBool startVertexArray (SoGLRenderAction *action, const SoCoordinateElement *coords, const SbVec3f *pervertexnormals, const SbBool texpervertex, const SbBool colorpervertex)
  • void finishVertexArray (SoGLRenderAction *action, const SbBool vbo, const SbBool normpervertex, const SbBool texpervertex, const SbBool colorpervertex)

🛡️ Protected Member Functions inherited from SoNode

  • SoNode (void) — the protected constructor, only for the node family 💅
  • virtual ~SoNode () — virtual destructor, cleans up your node vibes.
  • virtual SbBool readInstance (SoInput *in, unsigned short flags) — reads an instance from input. Protected, so it's giving inner-circle energy.

🛡️ Protected Member Functions inherited from SoFieldContainer

  • SoFieldContainer (void) — constructor, protected.
  • ~SoFieldContainer () — destructor, protected.

🛡️ Protected Member Functions inherited from SoBase

  • SoBase (void) — constructor, protected.
  • virtual ~SoBase () — virtual destructor.
  • virtual void destroy (void) — destroys the object.
  • SbBool hasMultipleWriteRefs (void) const — checks for multiple write refs.
  • SbBool writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const — writes a header.
  • void writeFooter (SoOutput *out) const — writes a footer.
  • virtual const char * getFileFormatName (void) const — gets the file format name.

✨ Static Protected Member Functions

  • static const SoFieldData ** getFieldDataPtr (void) — returns the field data pointer.

Static Protected Member Functions inherited from SoNonIndexedShape

  • static const SoFieldData ** getFieldDataPtr (void) — same vibe, inherited.

Static Protected Member Functions inherited from SoVertexShape

  • static const SoFieldData ** getFieldDataPtr (void) — yep, another one.

Static Protected Member Functions inherited from SoShape

  • static const SoFieldData ** getFieldDataPtr (void) — shape's turn.

Static Protected Member Functions inherited from SoNode

  • static const SoFieldData ** getFieldDataPtr (void) — node's version.
  • static void setNextActionMethodIndex (int index) — sets the next action method index.
  • static int getNextActionMethodIndex (void) — gets it.
  • static void incNextActionMethodIndex (void) — increments it.
  • static void setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask) — sets compatibility types.

Static Protected Member Functions inherited from SoBase

  • static uint32_t getCurrentWriteCounter (void) — gets the current write counter.
  • static void staticDataLock (void) — locks static data.
  • static void staticDataUnlock (void) — unlocks static data.

🫶 Additional Inherited Members

Public Types inherited from SoShape

enum TriangleShape { TRIANGLE_STRIP, TRIANGLE_FAN, TRIANGLES, POLYGON,
    QUADS, QUAD_STRIP, POINTS, LINES, LINE_STRIP }

Public Types inherited from SoNode

enum NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002,
    INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010,
    INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080,
    COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 =
    0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000
    }

Protected Types inherited from SoBase

enum BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }

Protected Attributes inherited from SoNode

  • uint32_t uniqueId

Protected Attributes inherited from SoFieldContainer

  • SbBool isBuiltIn

Static Protected Attributes inherited from SoNode

  • static uint32_t nextUniqueId = 0
  • static int nextActionMethodIndex = 0

💖 Detailed Description 💖

The SoQuadMesh class is used to render and optimize a quadrilateral mesh. ✨

This node uses the coordinates in order, either from the state or from the SoQuadMesh::vertexProperty node, to construct a quadrilateral mesh.

The quads are generated in row major order, using the two fields SoQuadMesh::verticesPerColumn and SoQuadMesh::verticesPerRow to specify the mesh. E.g. if SoQuadMesh::verticesPerColumn is 3 and SoQuadMesh::verticesPerRow is 2, two quads will be generated with the first one using (in order) coordinates 0, 1, 3 and 2, the second one using coordinates 2, 3, 5 and 4 (you get three rows of vertices; the first row uses vertices 0 and 1, the second row 2 and 3, and the third row 4 and 5).

Here's a quick and simple usage example code snippet:

// Vertices for the Quad mesh.
static float vertices[25][3] = {
  // Row 1
  {-11, 0, 1}, {0, 11, 1}, {11, 0, 1}, {0, -11, 1}, {-11, 0, 1},
  // Row 2
  {-9, 0, 1}, {0, 9, 1}, {9, 0, 1}, {0, -9, 1}, {-9, 0, 1},
  // Row 3
  {-9, 0, -1}, {0, 9, -1}, {9, 0, -1}, {0, -9, -1}, {-9, 0, -1},
  // Row 4
  {-11, 0, -1}, {0, 11, -1}, {11, 0, -1}, {0, -11, -1}, {-11, 0, -1},
  // Row 5
  {-11, 0, 1}, {0, 11, 1}, {11, 0, 1}, {0, -11, 1}, {-11, 0, 1}
};

// This function generate an object by using the SoQuadMesh node
// Return:
//  SoSeparator *
static SoSeparator *
quadMesh(void)
{
  SoSeparator * qm = new SoSeparator;

  // Define coordinates
  SoCoordinate3 * coords = new SoCoordinate3;
  coords->point.setValues(0, 30, vertices);
  qm->addChild(coords);

  // QuadMesh
  SoQuadMesh * mesh = new SoQuadMesh;
  mesh->verticesPerRow = 5;
  mesh->verticesPerColumn = 5;
  qm->addChild(mesh);

  return qm;
}

The quadmesh geometry resulting from this code looks like this:

(picture a glowing quad mesh shape here — you know the vibe ✨)

Here is another example, this time making a 2x2 grid, with a texture:

#Inventor V2.1 ascii

Separator {
  Complexity { textureQuality 0.01 }
  Texture2 {
    image 2 2 4 0xff0000ff 0x00ff00ff 0xffff00ff 0xff00ffff
  }
  Coordinate3 {
    point [
      0 2 0,
      1 2 0,
      2 2 0,
      0 1 0,
      1 1 0,
      2 1 0,
      0 0 0,
      1 0 0,
      2 0 0
    ]
  }
  QuadMesh {
    verticesPerRow 3
    verticesPerColumn 3
  }
}

For SoQuadMesh, normals and materials can be bound PER_PART (per row), PER_FACE, PER_VERTEX and OVERALL. The default material binding is OVERALL. The default normal binding is PER_VERTEX.

A note about SoQuadMesh shading: the quads in the mesh are just passed on to OpenGL's GL_QUAD primitive rendering. Under certain circumstances, this can lead to artifacts in how your meshes are shaded. This is an inherent problem with drawing quads in meshes. 😭

There is a work-around solution for the above mentioned problem that can be applied with Coin: by setting the global environment variable COIN_QUADMESH_PRECISE_LIGHTING to "1", the quads will be broken up in triangles before rendered, and shading will likely look much better. Be aware that this technique causes rendering of the SoQuadMesh to slow down by an approximate factor of 6.

The "precise lighting" technique is currently limited to work only when SoQuadMesh rendering is parameterized with 3D coordinates, a materialbinding that is not per vertex, and if texture mapping is done is must be without using any of the SoTextureCoordinateFunction subclass nodes.

FILE FORMAT/DEFAULTS:

QuadMesh {
    vertexProperty NULL
    startIndex 0
    verticesPerColumn 1
    verticesPerRow 1
}

👀 See also 👀

SoTriangleStripSet SoIndexedTriangleStripSet

🛠️ Constructor & Destructor Documentation 🛠️

SoQuadMesh::SoQuadMesh (void )

Constructor.

References SoQuadMesh(), verticesPerColumn, and verticesPerRow.

Referenced by getFieldData(), and SoQuadMesh().

SoQuadMesh::~SoQuadMesh () [protected], [virtual]

Destructor.

💖 SoType SoQuadMesh::getTypeId (void ) const [virtual]

okay bestie, this one is literally the ✨identity check✨ of the whole class system. It hands you back the type identification of any object that descends from SoBase, and it's what makes run-time type checking and "downward" casting a thing at all.

Usage example, no cap:

void foo(SoNode * node)
{
  if (node->getTypeId() == SoFile::getClassTypeId()) {
    SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type
  }
  else if (node->getTypeId().isOfType(SoGroup::getClassTypeId())) {
    SoGroup * group = (SoGroup *)node;  // safe downward cast, knows the type
  }
}

so if you're an application programmer who wants to extend the library with new nodes, engines, nodekits, draggers or whatever else — this method needs to be overridden in all subclasses. Like, all of them. And that's typically done as part of setting up the full type system for your extension classes, which usually happens by using the pre-defined macros available through, for instance, Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on. iykyk 🧚

want more deets on writing Coin extensions? see the class documentation of the toplevel superclasses for the various class groups. 💅

Reimplemented from SoNonIndexedShape.

🌸 const SoFieldData * SoQuadMesh::getFieldData (void ) const [protected], [virtual]

gives you back a pointer to the class-wide field data storage object for this instance. And if there are no fields present? it returns NULL. that's it, that's the vibe. 🫶

Reimplemented from SoNonIndexedShape.

References SoQuadMesh().

🔥 void SoQuadMesh::GLRender (SoGLRenderAction * action) [virtual]

this is the action method for SoGLRenderAction, bestie. it gets called during rendering traversals. Any node that influences the rendering state in any way, or who wants to throw geometry primitives at OpenGL, overrides this method. main character energy only. 👑

Reimplemented from SoShape.

References:

  • SoVertexShape::generateAndReadLockNormalCache()
  • SoAction::getState()
  • SoVertexShape::getVertexData()
  • SoState::pop()
  • SoDebugError::postWarning()
  • SoState::push()
  • SoVertexShape::readUnlockNormalCache()
  • SoVertexShape::shouldGLRender()
  • SoNonIndexedShape::startIndex
  • SoVertexShape::vertexProperty
  • verticesPerColumn
  • verticesPerRow

💜 void SoQuadMesh::getPrimitiveCount (SoGetPrimitiveCountAction * action) [virtual]

action method for SoGetPrimitiveCountAction. it calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action. math girlie behavior, we love to see it. ✨

Nodes that influence how geometry nodes calculate their primitive count also override this method to change the relevant state variables.

Reimplemented from SoShape.

References:

  • SoGetPrimitiveCountAction::addNumTriangles()
  • SoShape::shouldPrimitiveCount()
  • verticesPerRow

🦋 SbBool SoQuadMesh::generateDefaultNormals (SoState * state, SoNormalBundle * bundle) [virtual]

heads up bestie: this API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Subclasses should override this method to generate default normals using the SoNormalBundle class. TRUE should be returned if normals were generated, FALSE otherwise.

Default method returns FALSE.

This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API. 📌

Reimplemented from SoVertexShape.

🎀 void SoQuadMesh::generatePrimitives (SoAction * action) [protected], [virtual]

this method implements action behavior for shape nodes for SoCallbackAction. It is invoked from SoShape::callback(). (and listen: subclasses should not override SoNode::callback(), okay? don't do it. 🙈)

The subclass implementations use the convenience methods SoShape::beginShape(), SoShape::shapeVertex(), and SoShape::endShape(), with SoDetail instances, to pass the primitives making up the shape back to the caller.

Implements SoShape.

References:

  • SoShape::beginShape()
  • SoShape::endShape()
  • SoVertexShape::generateAndReadLockNormalCache()
  • SoAction::getState()
  • SoVertexShape::getVertexData()
  • SoFaceDetail::incFaceIndex()
  • SoFaceDetail::incPartIndex()
  • SoState::pop()
  • SoState::push()
  • SoVertexShape::readUnlockNormalCache()
  • SoPointDetail::setCoordinateIndex()
  • SoPrimitiveVertex::setDetail()
  • SoFaceDetail::setFaceIndex()
  • SoPointDetail::setMaterialIndex()
  • SoPrimitiveVertex::setMaterialIndex()
  • SoPrimitiveVertex::setNormal()
  • SoPointDetail::setNormalIndex()
  • SoPrimitiveVertex::setPoint()
  • SoPointDetail::setTextureCoordIndex()
  • SoPrimitiveVertex::setTextureCoords()
  • SoShape::shapeVertex()
  • SoNonIndexedShape::startIndex
  • SoVertexShape::vertexProperty
  • verticesPerColumn
  • verticesPerRow

🌈 void SoQuadMesh::computeBBox (SoAction * action, SbBox3f & box, SbVec3f & center) [protected], [virtual]

Implemented by SoShape subclasses to let the SoShape superclass know the exact size and weighted center point of the shape's bounding box. 📐

The bounding box and center point should be calculated and returned in the local coordinate system.

This method implements action behavior for shape nodes for SoGetBoundingBoxAction. It is invoked from SoShape::getBoundingBox(). (again bestie — subclasses should not override SoNode::getBoundingBox().)

The box parameter sent in is guaranteed to be an empty box, while center is undefined upon function entry. so don't go reading center before you write it, that's giving undefined behavior vibes. 💀

Implements SoShape.

References:

  • SoNonIndexedShape::computeCoordBBox()
  • verticesPerRow

💅 SbBool SoQuadMesh::generateDefaultNormals (SoState * state, SoNormalCache * cache) [protected], [virtual]

another internal one, bestie — this API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Subclasses should override this method to generate default normals using the SoNormalCache class. This is more effective than using SoNormalGenerator. Return TRUE if normals were generated, FALSE otherwise.

Default method just returns FALSE.

This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API. 📌

Reimplemented from SoVertexShape.

References:

  • SoNonIndexedShape::startIndex
  • verticesPerColumn
  • verticesPerRow

🌟 Member Data Documentation 🌟

SoSFInt32 SoQuadMesh::verticesPerColumn

Specifies to number of vertices in each column. (yes, "to number". we're quoting the ancestors verbatim, they ate and we respect it. 👑)

Referenced by generateDefaultNormals(), generatePrimitives(), GLRender(), and SoQuadMesh().

SoSFInt32 SoQuadMesh::verticesPerRow

Specifies the number of vertices in each row. 🍓

Referenced by computeBBox(), generateDefaultNormals(), generatePrimitives(), getPrimitiveCount(), GLRender(), and SoQuadMesh().

✨ Author ✨

Generated automatically by Doxygen for Coin from the source code. the robot wrote it, I just gave it a glow-up. 💖

and that's a wrap on the whole page, bestie!! this was Coin, Version 2.5.0, documented as SoQuadMesh(3) — go forth and mesh your quads, you absolute icon. 🦋💜🎀

📦 where this page comes from