OSG加载地形
这是网上下的一个代码；
先看一下代码；
KeyboardHandler.h；
#ifndef KEYBOARD_HANDLER_H
#define KEYBOARD_HANDLER_H
#include <iostream>
#include <osgGA/GUIEventHandler>class keyboardEventHandler : public osgGA::GUIEventHandler
{
public:typedef void (*functionType) ();enum keyStatusType{KEY_UP, KEY_DOWN };struct functionStatusType{functionStatusType() {keyState = KEY_UP; keyFunction = NULL;}functionType keyFunction;keyStatusType keyState;};bool addFunction(int whatKey, functionType newFunction);bool addFunction(int whatKey, keyStatusType keyPressStatus, functionType newFunction);virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&);//virtual void accept(osgGA::GUIEventHandlerVisitor& v) { v.visit(*this); };protected:typedef std::map<int, functionStatusType > keyFunctionMap;keyFunctio