SoGate SoElapsedTimer

/*-------------------------------------------------------------- * Gate engine. * Mouse button presses enable and disable a gate engine. * The gate engine controls an elapsed time engine that * controls the motion of the duck. *------------------------------------------------------------*/ #include <Inventor/SoDB.h> #include <Inventor/Win/SoWin.h> #include <Inventor/Win/SoWinRenderArea.h> #include <Inventor/engines/SoCompose.h> #include <Inventor/engines/SoElapsedTime.h> #include <Inventor/engines/SoGate.h> #include <Inventor/events/SoMouseButtonEvent.h> #include <Inventor/nodes/SoCylinder.h> #include <Inventor/nodes/SoDirectionalLight.h> #include <Inventor/nodes/SoEventCallback.h> #include <Inventor/nodes/SoMaterial.h> #include <Inventor/nodes/SoPerspectiveCamera.h> #include <Inventor/nodes/SoRotationXYZ.h> #include <Inventor/nodes/SoSeparator.h> #include <Inventor/nodes/SoTransform.h> #include <Inventor/nodes/SoTranslation.h> #ifdef WIN32 # include "print.h" #endif void myMousePressCB(void *, SoEventCallback *); int main(int, char **argv) { // Print out usage message printf("Click the left mouse button to enable/disable the duck motion/n"); // Initialize Inventor and Win HWND myWindow = SoWin::init(argv[0]); if (myWindow == NULL) exit(1); SoSeparator *root = new SoSeparator; root->ref(); // Add a camera and light SoPerspectiveCamera *myCamera = new SoPerspectiveCamera; myCamera->position.setValue(0.0f, -4.0f, 8.0f); myCamera->heightAngle = (float)(M_PI/2.5f); myCamera->nearDistance = 1.0f; myCamera->farDistance = 15.0f; root->addChild(myCamera); root->addChild(new SoDirectionalLight); // Rotate scene slightly to get better view SoRotationXYZ *globalRotXYZ = new SoRotationXYZ; globalRotXYZ->axis = SoRotationXYZ::X; globalRotXYZ->angle = (float)(M_PI/9.0f); root->addChild(globalRotXYZ); // Pond group SoSeparator *pond = new SoSeparator; root->addChild(pond); SoMaterial *cylMaterial = new SoMaterial; cylMaterial->diffuseColor.setValue(0.0f, 0.3f, 0.8f); pond->addChild(cylMaterial); SoTranslation *cylTranslation = new SoTranslation; cylTranslation->translation.setValue(0.0f, -6.725f, 0.0f); pond->addChild(cylTranslation); SoCylinder *myCylinder = new SoCylinder; myCylinder->radius.setValue(4.0f); myCylinder->height.setValue(0.5f); pond->addChild(myCylinder); ///////////////////////////////////////////////////////////// // CODE FOR The Inventor Mentor STARTS HERE (part 1) // Duck group SoSeparator *duck = new SoSeparator; root->addChild(duck); // Read the duck object from a file and add to the group SoInput myInput; if (!myInput.openFile("../data/duck.iv")) exit (1); SoSeparator *duckObject = SoDB::readAll(&myInput); if (duckObject == NULL) exit (1); // Set up the duck transformations SoRotationXYZ *duckRotXYZ = new SoRotationXYZ; duck->addChild(duckRotXYZ); SoTransform *initialTransform = new SoTransform; initialTransform->translation.setValue(0.0f, 0.0f, 3.0f); initialTransform->scaleFactor.setValue(6.0f, 6.0f, 6.0f); duck->addChild(initialTransform); duck->addChild(duckObject); // Update the rotation value if the gate is enabled. SoGate *myGate = new SoGate(SoMFFloat::getClassTypeId()); SoElapsedTime *myCounter = new SoElapsedTime; myGate->input->connectFrom(&myCounter->timeOut); duckRotXYZ->axis = SoRotationXYZ::Y; // rotate about Y axis duckRotXYZ->angle.connectFrom(myGate->output); // Add an event callback to catch mouse button presses. // Each button press will enable or disable the duck motion. SoEventCallback *myEventCB = new SoEventCallback; myEventCB->addEventCallback( SoMouseButtonEvent::getClassTypeId(), myMousePressCB, myGate); root->addChild(myEventCB); // CODE FOR The Inventor Mentor ENDS HERE ///////////////////////////////////////////////////////////// SoWinRenderArea *myRenderArea = new SoWinRenderArea(myWindow); myRenderArea->setSceneGraph(root); myRenderArea->setTitle("Duck Pond"); myRenderArea->show(); SoWin::show(myWindow); SoWin::mainLoop(); return 0; } ///////////////////////////////////////////////////////////// // CODE FOR The Inventor Mentor STARTS HERE (part 2) // This routine is called for every mouse button event. void myMousePressCB(void *userData, SoEventCallback *eventCB) { SoGate *gate = (SoGate *) userData; const SoEvent *event = eventCB->getEvent(); // Check for mouse button being pressed if (SO_MOUSE_PRESS_EVENT(event, ANY)) { // Toggle the gate that controls the duck motion if (gate->enable.getValue()) gate->enable.setValue(FALSE); else gate->enable.setValue(TRUE); eventCB->setHandled(); } } // CODE FOR The Inventor Mentor ENDS HERE /////////////////////////////////////////////////////////////