180 lines
3.1 KiB
C++
180 lines
3.1 KiB
C++
#include "..\e2dmanager.h"
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#include "..\e2dbase.h"
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#include "..\e2dtransition.h"
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static bool s_bSaveCurrScene = true;
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static e2d::Scene * s_pCurrScene = nullptr;
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static e2d::Scene * s_pNextScene = nullptr;
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static e2d::Transition * s_pTransition = nullptr;
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static std::stack<e2d::Scene*> s_SceneStack;
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void e2d::SceneManager::enter(Scene * scene, Transition * transition /* = nullptr */, bool saveCurrentScene /* = true */)
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{
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ASSERT(scene, "Next scene NULL pointer exception!");
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scene->retain();
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// 保存下一场景的指针
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s_pNextScene = scene;
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// 设置切换场景动作
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if (transition)
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{
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if (s_pTransition)
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{
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s_pTransition->_stop();
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s_pTransition->release();
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}
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s_pTransition = transition;
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transition->retain();
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transition->_init(s_pCurrScene, s_pNextScene);
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transition->_update();
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}
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if (s_pCurrScene)
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{
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s_bSaveCurrScene = saveCurrentScene;
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}
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}
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void e2d::SceneManager::back(Transition * transition /* = nullptr */)
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{
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// 栈为空时，调用返回场景函数失败
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WARN_IF(s_SceneStack.size() == 0, "Scene stack is empty!");
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if (s_SceneStack.size() == 0) return;
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// 从栈顶取出场景指针，作为下一场景
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s_pNextScene = s_SceneStack.top();
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s_SceneStack.pop();
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// 返回上一场景时，不保存当前场景
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if (s_pCurrScene)
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{
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s_bSaveCurrScene = false;
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}
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// 设置切换场景动作
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if (transition)
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{
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s_pTransition = transition;
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transition->retain();
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transition->_init(s_pCurrScene, s_pNextScene);
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transition->_update();
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}
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}
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void e2d::SceneManager::clear()
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{
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// 清空场景栈
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while (s_SceneStack.size())
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{
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auto temp = s_SceneStack.top();
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SafeRelease(temp);
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s_SceneStack.pop();
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}
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}
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e2d::Scene * e2d::SceneManager::getCurrentScene()
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{
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return s_pCurrScene;
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}
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std::stack<e2d::Scene*> e2d::SceneManager::getSceneStack()
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{
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return s_SceneStack;
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}
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bool e2d::SceneManager::isTransitioning()
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{
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return s_pTransition != nullptr;
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}
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void e2d::SceneManager::__update()
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{
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if (s_pTransition == nullptr)
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{
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// 更新场景内容
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if (s_pCurrScene)
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{
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s_pCurrScene->_update();
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}
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}
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else
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{
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// 更新场景动作
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s_pTransition->_update();
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if (s_pTransition->isDone())
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{
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s_pTransition->release();
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s_pTransition = nullptr;
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}
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else
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{
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return;
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}
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}
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// 下一场景指针不为空时，切换场景
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if (s_pNextScene)
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{
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// 执行当前场景的 onExit 函数
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s_pCurrScene->onExit();
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// 若要保存当前场景，把它放入栈中
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if (s_bSaveCurrScene)
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{
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s_SceneStack.push(s_pCurrScene);
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}
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else
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{
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SafeRelease(s_pCurrScene);
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}
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// 执行下一场景的 onEnter 函数
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s_pNextScene->onEnter();
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s_pCurrScene = s_pNextScene; // 切换场景
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s_pNextScene = nullptr; // 下一场景置空
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}
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}
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void e2d::SceneManager::__render()
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{
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if (s_pTransition)
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{
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s_pTransition->_render();
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}
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else
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{
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// 绘制当前场景
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if (s_pCurrScene)
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{
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s_pCurrScene->_render();
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}
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}
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}
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bool e2d::SceneManager::__init()
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{
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// 若游戏初始化时场景不为空，进入该场景
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if (s_pNextScene)
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{
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s_pCurrScene = s_pNextScene;
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s_pCurrScene->onEnter();
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s_pNextScene = nullptr;
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}
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// 更新场景内容
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SceneManager::__update();
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return true;
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}
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void e2d::SceneManager::__uninit()
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{
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SafeRelease(s_pCurrScene);
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SafeRelease(s_pNextScene);
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SafeRelease(s_pTransition);
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SceneManager::clear();
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}
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