socall,SoCallbackAction 疯狂代码！

socall,SoCallbackAction

/*----------------------------------------------------------- * Using a callback for generated primitives. * A simple scene with a sphere is created. * A callback is used to write out the triangles that * form the sphere in the scene. *----------------------------------------------------------*/ #include <Inventor/SoDB.h> #include <Inventor/SoPrimitiveVertex.h> #include <Inventor/actions/SoCallbackAction.h> #include <Inventor/actions/SoWriteAction.h> #include <Inventor/nodes/SoDirectionalLight.h> #include <Inventor/nodes/SoMaterial.h> #include <Inventor/nodes/SoPerspectiveCamera.h> #include <Inventor/nodes/SoSeparator.h> #include <Inventor/nodes/SoSphere.h> #ifdef WIN32 # include "print.h" #endif // Function prototypes void printSpheres(SoNode *); int printHeaderCallback(void *, SoCallbackAction *, const SoNode *); void printTriangleCallback(void *, SoCallbackAction *, const SoPrimitiveVertex *, const SoPrimitiveVertex *, const SoPrimitiveVertex *); void printVertex(const SoPrimitiveVertex *); ////////////////////////////////////////////////////////////// // CODE FOR The Inventor Mentor STARTS HERE void printSpheres(SoNode *root) { SoCallbackAction myAction; //#ifdef WIN32 // myAction.addPreCallback(SoSphere::getClassTypeId(), // printHeaderCallback, NULL); //#else myAction.addPreCallback(SoSphere::getClassTypeId(), (SoCallbackAction::SoCallbackActionCB *)printHeaderCallback, NULL); //#endif myAction.addTriangleCallback(SoSphere::getClassTypeId(), printTriangleCallback, NULL); myAction.apply(root); } int printHeaderCallback(void *, SoCallbackAction *, const SoNode *node) { printf("\n Sphere "); // Print the node name (if it exists) and address if (! !node->getName()) printf("named \"%s\" ", node->getName().getString()); printf("at address %#x\n", node); return SoCallbackAction::CONTINUE; } void printTriangleCallback(void *, SoCallbackAction *, const SoPrimitiveVertex *vertex1, const SoPrimitiveVertex *vertex2, const SoPrimitiveVertex *vertex3) { printf("Triangle:\n"); printVertex(vertex1); printVertex(vertex2); printVertex(vertex3); } void printVertex(const SoPrimitiveVertex *vertex) { const SbVec3f &point = vertex->getPoint(); printf("\tCoords = (%g, %g, %g)\n", point[0], point[1], point[2]); const SbVec3f &normal = vertex->getNormal(); printf("\tNormal = (%g, %g, %g)\n", normal[0], normal[1], normal[2]); } // CODE FOR The Inventor Mentor ENDS HERE /////////////////////////////////////////////////////////////// int main(int, char **) { // Initialize Inventor SoDB::init(); // Make a scene containing a red sphere SoSeparator *root = new SoSeparator; SoPerspectiveCamera *myCamera = new SoPerspectiveCamera; SoMaterial *myMaterial = new SoMaterial; root->ref(); root->addChild(myCamera); root->addChild(new SoDirectionalLight); myMaterial->diffuseColor.setValue(1.0, 0.0, 0.0); // Red root->addChild(myMaterial); root->addChild(new SoSphere); root->ref(); // Write out the triangles that form the sphere in the scene printSpheres(root); root->unref(); exit(1); // The usual exit(0) has been replaced with exit(1) to enable the console // window showing the output to stay on the screen until the user deletes it return 1; }

Tags: action socall

socall,SoCallbackAction

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