about SelectBuffer?

This is the code how to get Object ID. But i don't known how to get (x,y,z) coord(3D) of Object by mouse select? EveryOne help me!. Thank All. int RetrieveObjectID(int x, int y) { int objectsFound = 0; unsigned int selectBuffer[32] = {0}; glSelectBuffer(32, selectBuffer); // Setup our selection buffer to accept object ID's glGetIntegerv(GL_VIEWPORT, viewportCoords); glMatrixMode(GL_PROJECTION); glPushMatrix(); glRenderMode(GL_SELECT); glLoadIdentity(); gluPickMatrix(x, viewportCoords[3] - y, 2, 2, viewportCoords); gluPerspective(45.0f,(float)g_rRect.right/(float)g_rRect.bottom,0.1f,150.0f); glMatrixMode(GL_MODELVIEW); RenderScene(); objectsFound = glRenderMode(GL_RENDER); // glMatrixMode(GL_PROJECTION); // Put glPopMatrix(); glMatrixMode(GL_MODELVIEW); if (objectsFound > 0) { int selectedObject = selectBuffer[3]; for(int i = 1; i < objectsFound; i++) { if(selectBuffer[(i * 4) + 1] < lowestDepth) { lowestDepth = selectBuffer[(i * 4) + 1]; selectedObject = selectBuffer[(i * 4) + 3]; } } return selectedObject; } return 0; } [Edited by - doilathekg on February 26, 2008 4:45:24 AM]