Add osgemscripten example

2017-06-22 09:44:06 +07:00
parent 0b5f45289d
commit f992ec1440
7 changed files with 1307 additions and 0 deletions
--- a/examples/osgemscripten/osgemscripten.cpp
+++ b/examples/osgemscripten/osgemscripten.cpp
@@ -0,0 +1,84 @@
+/* OpenSceneGraph example, emscripten.
+*
+*  Permission is hereby granted, free of charge, to any person obtaining a copy
+*  of this software and associated documentation files (the "Software"), to deal
+*  in the Software without restriction, including without limitation the rights
+*  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+*  copies of the Software, and to permit persons to whom the Software is
+*  furnished to do so, subject to the following conditions:
+*
+*  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+*  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+*  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+*  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+*  THE SOFTWARE.
+*/
+
+#include <emscripten.h>
+#include <SDL2/SDL.h>
+
+#include "osgemscripten.h"
+
+// We use app global variable in loop() function.
+Application *app = 0;
+
+// Stand alone function that is called by Emscripten to run the app.
+void loop()
+{
+    SDL_Event e;
+    while (SDL_PollEvent(&e))
+    {
+        if (app)
+        {
+            app->handleEvent(e);
+        }
+    }
+    if (app)
+    {
+        app->frame();
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    // Make sure SDL is working.
+    if (SDL_Init(SDL_INIT_VIDEO) < 0)
+    {
+        printf("OSGWeb. Could not init SDL: '%s'\n", SDL_GetError());
+        return 1;
+    }
+    // Clean SDL up at exit.
+    atexit(SDL_Quit);
+    // Configure rendering context.
+    SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
+    SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
+    SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
+    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+    // Create rendering window.
+    int width = 800;
+    int height = 600;
+    SDL_Window* window =
+        SDL_CreateWindow(
+            "OSGWeb",
+            SDL_WINDOWPOS_CENTERED,
+            SDL_WINDOWPOS_CENTERED,
+            width,
+            height,
+            SDL_WINDOW_OPENGL);
+    if (!window)
+    {
+        printf("OSGWeb. Could not create window: '%s'\n", SDL_GetError());
+        return 1;
+    }
+    SDL_GL_CreateContext(window);
+    // Create application.
+    app = new Application;
+    app->setupWindow(width, height);
+    app->loadScene("box.osgt");
+    // Render asynchronously.
+    emscripten_set_main_loop(loop, -1, 0);
+    return 0;
+}