#include <Inventor/nodes/SoQuadMesh.h>
Inheritance diagram for SoQuadMesh:
Public Member Functions | |
SoQuadMesh (void) | |
virtual void | GLRender (SoGLRenderAction *action) |
virtual void | getPrimitiveCount (SoGetPrimitiveCountAction *action) |
virtual SbBool | generateDefaultNormals (SoState *state, SoNormalBundle *nb) |
Static Public Member Functions | |
void | initClass (void) |
Public Attributes | |
SoSFInt32 | verticesPerColumn |
SoSFInt32 | verticesPerRow |
Protected Member Functions | |
virtual | ~SoQuadMesh () |
virtual void | generatePrimitives (SoAction *action) |
virtual void | computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er) |
virtual SbBool | generateDefaultNormals (SoState *, SoNormalCache *) |
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:<br>
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.
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Constructor. |
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Destructor. |
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Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. Reimplemented from SoNonIndexedShape. |
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Action method for the SoGLRenderAction. This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method. Reimplemented from SoShape. |
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Action method for the SoGetPrimitiveCountAction. Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action. Nodes influencing how geometry nodes calculates their primitive count also overrides this method to change the relevant state variables. Reimplemented from SoShape. |
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Subclasses should override this method to generate default normals using the SoNormalBundle class. Reimplemented from SoVertexShape. |
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The method implements action behavior for shape nodes for SoCallbackAction. It is invoked from SoShape::callback(). (Subclasses should not override SoNode::callback().) The subclass implementations uses 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. |
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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. The method implements action behavior for shape nodes for SoGetBoundingBoxAction. It is invoked from SoShape::getBoundingBox(). (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. Implements SoShape. |
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Subclasses should override this method to generate default normals using the SoNormalCache class. This is more effective than using SoNormalGenerator. Return This method is not part of the original SGI Open Inventor API. Reimplemented from SoVertexShape. |
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Specifies to number of vertices in each column. |
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Specifies the number of vertices in each row. |