c++ - SDL 2.0.3 与 Ogre 1.9.0 和 IOS
<p><p>我正在尝试将 SDL 2.0.3 集成到 Ogre 1.9.0 以进行窗口和事件处理，它在 Linux 下运行良好，但在 IOS 7.1 下我遇到了问题。</p>
<p>我无法从 SDL 获取任何输入或窗口事件。我正在使用 <code>wmInfo.info.uikit.window</code> 来获取句柄，然后将其传递给 Ogre。我唯一不确定的是我是否正确获取了 GL 上下文。当我使用 Ogre <code>SDL_APP_DIDENTERFOREGROUND</code> 启动 SDL 时，我只能得到一个事件。 IOS有什么特别需要我做的吗？</p>
<p>我非常感谢任何帮助，因为我遇到了上述问题。</p>
<p>我也在 OSX 和 IOS 7.1 模拟器下工作。以下是我对原始 Ogre iOS 模板的更改。</p>
<p><em>SDL 和 Ogre 初始化:</em></p>
<pre><code>//SDL
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
printf("Could not initialize SDL\n");
return 1;
}
SDL_GL_SetAttribute(SDL_GL_CONTEXT_EGL, 1);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
SDL_DisplayMode displayMode;
SDL_GetDesktopDisplayMode(0, &displayMode);
/* create window and renderer */
SDL_Window* window = SDL_CreateWindow(NULL, 0, 0, displayMode.w, displayMode.h, SDL_WINDOW_OPENGL | SDL_WINDOW_FULLSCREEN | SDL_WINDOW_RESIZABLE);
SDL_GLContext glContext = SDL_GL_CreateContext(window);
SDL_SysWMinfo wmInfo;
SDL_VERSION(&wmInfo.version);
SDL_GetWindowWMInfo(window,&wmInfo);
m_pLog = Ogre::LogManager::getSingleton().createLog("OgreLogfile.log", true, true, false);
m_pLog->setDebugOutputEnabled(true);
String pluginsPath;
m_pRoot = new Ogre::Root(pluginsPath, Ogre::macBundlePath() + "/ogre.cfg");
m_StaticPluginLoader.load();
m_pRenderWnd = m_pRoot->initialise(false, wndTitle);
size_t winHandle = reinterpret_cast<size_t>(wmInfo.info.uikit.window);
size_t glHandle = reinterpret_cast<size_t>(glContext);
Ogre::NameValuePairList params;
params["externalWindowHandle"] = Ogre::StringConverter::toString((unsigned long)winHandle);
params["externalGLContext"] = Ogre::StringConverter::toString((unsigned long)glHandle);
params["externalGLControl"] = String("True");
m_pRenderWnd = m_pRoot->createRenderWindow("", displayMode.w/2, displayMode.h/2, false,&params);
</code></pre>
<p><em>我的主循环:</em></p>
<pre><code>DemoApp demo;
demo.startDemo();
bool done = false;
SDL_Event event;
double mStartTime;
double mLastFrameTime;
while (!done)
{
mStartTime = OgreFramework::getSingletonPtr()->m_pTimer->getMillisecondsCPU();
OgreFramework::getSingletonPtr()->updateOgre(mLastFrameTime);
OgreFramework::getSingletonPtr()->m_pRoot->renderOneFrame();
mLastFrameTime = OgreFramework::getSingletonPtr()->m_pTimer->getMillisecondsCPU() - mStartTime;
while (SDL_PollEvent(&event))
{
switch (event.type)
{
case SDL_FINGERMOTION:
SDL_Log("Finger Motion");
break;
case SDL_FINGERDOWN:
SDL_Log("Finger Down");
break;
case SDL_FINGERUP:
SDL_Log("Finger Up");
break;
case SDL_QUIT:
done = true;
break;
case SDL_APP_DIDENTERFOREGROUND:
SDL_Log("SDL_APP_DIDENTERFOREGROUND");
break;
case SDL_APP_DIDENTERBACKGROUND:
SDL_Log("SDL_APP_DIDENTERBACKGROUND");
break;
case SDL_APP_LOWMEMORY:
SDL_Log("SDL_APP_LOWMEMORY");
break;
case SDL_APP_TERMINATING:
SDL_Log("SDL_APP_TERMINATING");
break;
case SDL_APP_WILLENTERBACKGROUND:
SDL_Log("SDL_APP_WILLENTERBACKGROUND");
break;
case SDL_APP_WILLENTERFOREGROUND:
SDL_Log("SDL_APP_WILLENTERFOREGROUND");
break;
case SDL_WINDOWEVENT:
{
switch (event.window.event)
{
case SDL_WINDOWEVENT_RESIZED:
{
SDL_Log("Window %d resized to %dx%d", event.window.windowID, event.window.data1, event.window.data2);
break;
}
}
}
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>我意识到这个问题现在已经有几年了，但我遇到了同样的问题，我希望我的解决方案对其他人有用。</p>
<p>问题是您将 SDL 的 UIView (SDL_uikitview) 替换为 Ogre 的 UIView (OgreEAGL2View)，因此您将不再接收任何触摸输入或通过 SDL_uikitviewcontroller 或 SDL_uikitview 实现的任何功能。此替换发生在 GLES2 RenderSystem 内部(特别是在 OgreEAGL2Window.mm 中)</p>
<p>我自己解决这个问题的方法是创建自己的 UIViewController 和 UIView，然后将该 View <em>置于</em> SDL 的 View 之后。然后，您可以从 SDL 的 View 接收触摸输入，同时渲染到 Ogre 的 View 中。这将需要创建一个 Objective-C 编译单元，代码如下所示:</p>
<pre><code>#include "OgreEAGL2View.h"
#import <UIKit/UIWindow.h>
#import <UIKit/UIDevice.h>
// other includes
// call this from your C++ framework
// pass it your startup params
void setupMyiOSViews(Ogre::NameValuePairList &params)
{
// grab the UIWindow (you must have called SDL_createwindow before calling this)
SDL_SysWMinfo wmInfo;
SDL_Window *sdlWindow;
SDL_VERSION(&wmInfo.version);
SDL_GetWindowWMInfo(sdlWindow, &wmInfo);
UIWindow *w = wmInfo.info.uikit.window;
// get a rectangle with the screen dimensions
CGRect rect = [ applicationFrame];
// instantiate a view controller of Ogre's subclass of UIViewController
EAGL2ViewController *myViewController = [ init];
// instantiate a view of Ogre's subclass of UIView
EAGL2View *myView = [ initWithFrame:rect];
// make sure it's not transparent
myView.opaque = YES;
// attach the view to the viewcontroller
myViewController.view = myView;
// add the view to the current window
;
// put the view *behind* the SDL view
;
// add the window, viewcontroller, and view to the proper parameters
// UIWindow maps to param: externalWindowHandle
// UIViewController maps to param: externalViewControllerHandle
// UIView maps to param: externalViewHandle
Ogre::String str_w = Ogre::StringConverter::toString((unsigned long)w);
Ogre::String str_vc = Ogre::StringConverter::toString((unsigned long)myViewController);
Ogre::String str_v = Ogre::StringConverter::toString((unsigned long)myView);
params["externalWindowHandle"] = str_w;
params["externalViewControllerHandle"] = str_vc;
params["externalViewHandle"] = str_v;
Ogre::LogManager::getSingleton().logMessage("externalWindowHandle: " + str_w);
Ogre::LogManager::getSingleton().logMessage("externalViewControllerHandle: " + str_vc);
Ogre::LogManager::getSingleton().logMessage("externalViewHandle: " + str_v);
// now pass params into Ogre::Root::createRenderWindow
}
</code></pre>
<p>请注意，甚至不需要使用 SDL 创建和上下文。 Ogre 现在将渲染到它自己的 View 和 ViewController 中</p></p>
<p style="font-size: 20px;">关于c++ - SDL 2.0.3 与 Ogre 1.9.0 和 IOS，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/25796462/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/25796462/
</a>
</p>
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