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@andsve
Created Oct 8, 2014
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Ogre 1.10.x Test for Emscripten
emsc:
em++ ogre_test.cpp -I/usr/ogre/OgreMain/include/ -I/usr/ogre/build/include/ -I/usr/ogre/RenderSystems/GLES2/include/ -I/usr/ogre/PlugIns/OctreeSceneManager/include/ -I/usr/ogre/Components/RTShaderSystem/include/ -o ogre_test.bc -Werror
em++ ogre_test.bc /usr/ogre/build_static/lib/libRenderSystem_GLES2Static.a /usr/ogre/build_static/lib/libPlugin_OctreeSceneManagerStatic.a /usr/ogre/build_static/lib/libOgreRTShaderSystemStatic.a /usr/ogre/build_static/lib/libOgreMainStatic.a -o ogre.html --preload-file assets/plugins.cfg --preload-file assets/media/models/ogrehead.mesh --preload-file assets/media/materials/scripts/Ogre.material --preload-file assets/media/materials/scripts/cool.frag --preload-file assets/media/materials/scripts/cool.vs
native:
g++ -L/usr/lib/x86_64-linux-gnu/ -lfreeimage -lpthread -lX11 -lXt -lXmu -lXaw -lm -lGL -lGLU -lXrandr ogre_test.cpp -I/usr/ogre/OgreMain/include/ -I/usr/ogre/build/include/ -I/usr/ogre/RenderSystems/GL/include/ -I/usr/ogre/PlugIns/OctreeSceneManager/include/ -I/usr/ogre/Components/RTShaderSystem/include/ /usr/ogre/build_native/lib/libRenderSystem_GLStatic.a /usr/ogre/build_native/lib/libPlugin_OctreeSceneManagerStatic.a /usr/ogre/build_native/lib/libOgreRTShaderSystemStatic.a /usr/ogre/build_native/lib/libOgreMainStatic.a -o ogre.a -fpermissive
all: emsc
#include <Ogre.h>
#ifdef EMSCRIPTEN
#include <OgreGLES2Plugin.h>
#include <EGL/egl.h>
#else
#include <OgreGLPlugin.h>
#endif
#include <OgreOctreePlugin.h>
#include <OgreRTShaderSystem.h>
#include <stdio.h>
using namespace Ogre;
Root* root = 0;
RenderWindow *window = 0;
void render_loop_cb()
{
window->update(false);
window->swapBuffers();
root->renderOneFrame();
Ogre::WindowEventUtilities::messagePump();
}
int main()
{
// create a ogre root,
root = new Root( "assets/plugins.cfg", "assets/ogre.cfg", "ogre.log" );
// load and install plugins here manually, since we are using a static build of ogre
// we need to be using GLES2 under emscripten
#ifdef EMSCRIPTEN
Ogre::GLES2Plugin *mGLPlugin = new Ogre::GLES2Plugin();
#else
Ogre::GLPlugin *mGLPlugin = new Ogre::GLPlugin();
#endif
Ogre::OctreePlugin* mOCPlugin = new Ogre::OctreePlugin();
mGLPlugin->install();
mOCPlugin->install();
// pick the first available render system
RenderSystem *renderSystem;
const RenderSystemList renderers = root->getAvailableRenderers();
// early exit if we didn't get a render system
if(renderers.empty())
{
printf("ERROR: No renderers are available.\n");
return -1;
}
renderSystem = *(renderers.begin());
Root::getSingleton().setRenderSystem(renderSystem);
renderSystem->setConfigOption("Video Mode", "640 x 480");
// the dependency tracking for emscripten seems to be missing
// that we are using EGL unless we explicitly use egl-functions here
#ifdef EMSCRIPTEN
printf( "fake-usage of egl: %X\n", (unsigned int) eglGetProcAddress("glClear") );
#endif
// this method can only be called after a renderer has been selected with Root::setRenderSystem
root->initialise(true, "Hello World!");
// resource handling
ResourceGroupManager::getSingleton().addResourceLocation( "assets/media/models", "FileSystem");
ResourceGroupManager::getSingleton().addResourceLocation( "assets/media/materials/scripts", "FileSystem");
ResourceGroupManager::getSingleton().initialiseAllResourceGroups();
// scene management
SceneManager *smgr = root->createSceneManager( ST_GENERIC, "DefaultSceneManager");
smgr->setAmbientLight(Ogre::ColourValue(0.5f, 0.5f, 0.5f)); // set ambient light for the scene
// Create an mesh entity and add it to the scene
Ogre::Entity* ogreHead = smgr->createEntity("Head", "ogrehead.mesh");
Ogre::SceneNode* headNode = smgr->getRootSceneNode()->createChildSceneNode("HeadNode");
headNode->attachObject(ogreHead);
headNode->translate( 0,0,-200.0f );
// Create a Light attach it as a child to the mesh head
Ogre::Light* light = smgr->createLight("MainLight");
light->setType(Ogre::Light::LT_DIRECTIONAL);
light->setDiffuseColour(ColourValue(0.5, 0.5, 0.5));
light->setSpecularColour(ColourValue(0.5, 0.5, 0.5));
light->setDirection(Ogre::Vector3(-1, 0.0, -1.0));
headNode->attachObject( light );
// setup a camera and viewport
Camera *cam = smgr->createCamera("MainCamera");
window = root->getAutoCreatedWindow();
Viewport *vp = window->addViewport(cam);
vp->setBackgroundColour(ColourValue(0.3, 0.6, 0.9));
// enter the main render loop
#ifdef EMSCRIPTEN
emscripten_set_main_loop( render_loop_cb, 0, 1 );
#else
while(1)
{
render_loop_cb();
}
#endif
delete root;
return 0;
}
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