SoTimerSensor with rotation animation

/*-------------------------------------------------------------- * Timer sensors. An object is rotated by a timer sensor. * (called "rotatingSensor"). The interval between calls * controls how often it rotates. * A second timer (called "schedulingSensor") goes off * every 5 seconds and changes the interval of * "rotatingSensor". The interval alternates between * once per second and 10 times per second. * This example could also be done using engines. *------------------------------------------------------------*/ #include <Inventor/SoDB.h> #include <Inventor/Win/SoWin.h> #include <Inventor/Win/viewers/SoWinExaminerViewer.h> #include <Inventor/nodes/SoCone.h> #include <Inventor/nodes/SoRotation.h> #include <Inventor/nodes/SoSeparator.h> #include <Inventor/nodes/SoTransform.h> #include <Inventor/sensors/SoTimerSensor.h> #ifdef WIN32 # include "print.h" #endif /////////////////////////////////////////////////////////// // CODE FOR The Inventor Mentor STARTS HERE // This function is called either 10 times/second or once every // second; the scheduling changes every 5 seconds (see below): static void rotatingSensorCallback(void *data, SoSensor *) { // Rotate an object... SoRotation *myRotation = (SoRotation *)data; SbRotation currentRotation = myRotation->rotation.getValue(); currentRotation = SbRotation(SbVec3f(0.0f, 0.0f, 1.0f), (float)(M_PI/90.0f)) * currentRotation; myRotation->rotation.setValue(currentRotation); } // This function is called once every 5 seconds, and // reschedules the other sensor. static void schedulingSensorCallback(void *data, SoSensor *) { SoTimerSensor *rotatingSensor = (SoTimerSensor *)data; rotatingSensor->unschedule(); if (rotatingSensor->getInterval() == 1.0f) rotatingSensor->setInterval(1.0f/10.0f); else rotatingSensor->setInterval(1.0f); rotatingSensor->schedule(); } // CODE FOR The Inventor Mentor ENDS HERE /////////////////////////////////////////////////////////// int main(int argc, char **argv) { if (argc != 2) { fprintf(stderr, "Usage: %s filename.iv/n", argv[0]); exit(1); } HWND myWindow = SoWin::init(argv[0]); if (myWindow == NULL) exit(1); SoSeparator *root = new SoSeparator; root->ref(); /////////////////////////////////////////////////////////// // CODE FOR The Inventor Mentor STARTS HERE SoRotation *myRotation = new SoRotation; root->addChild(myRotation); SoTimerSensor *rotatingSensor = new SoTimerSensor(rotatingSensorCallback, myRotation); rotatingSensor->setInterval(1.0f); // scheduled once per second rotatingSensor->schedule(); SoTimerSensor *schedulingSensor = new SoTimerSensor(schedulingSensorCallback, rotatingSensor); schedulingSensor->setInterval(5.0f); // once per 5 seconds schedulingSensor->schedule(); // CODE FOR The Inventor Mentor ENDS HERE /////////////////////////////////////////////////////////// SoInput inputFile; if (inputFile.openFile(argv[1]) == FALSE) { fprintf(stderr, "Could not open file %s/n", argv[1]); exit(1); } root->addChild(SoDB::readAll(&inputFile)); SoWinExaminerViewer *myViewer = new SoWinExaminerViewer(myWindow); myViewer->setSceneGraph(root); myViewer->setTitle("Two Timers"); myViewer->show(); SoWin::show(myWindow); // Display main window SoWin::mainLoop(); // Main Inventor event loop return 0; }