openscenegraph-cross-platform-examples
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OpenSceneGraph cross-platform examples: specific things you can do with OSG across platforms
Table of contents
- Overview
- Libraries
-
Building
- Desktop
- Android
- iOS
- Web
-
Examples
- 01. Embed resource into executable
- 02. Use PNG images with PNG plugins
- 03. Implement HTTP client to perform GET/POST requests
- 04. Debug application remotely
- 05. Node selection
- 06. Command sequence
- Help
Overview
OpenSceneGraph is an open source high performance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling.
This document is a logical continuation of OpenSceneGraph cross-platform guide. Here you'll find a collection of examples to perform specific tasks.
Examples run on the following platforms:
- Linux
- macOS
- Android
- iOS
- Web
Note: Windows builds have not yet been tested.
Libraries
Each example uses OpenSceneGraph. OpenSceneGraph is built as part of each example: examples don't use OpenSceneGraph libraries built separately, instead each example includes OpenSceneGraph sources directly. This was necessary to simplify building OpenSceneGraph across platforms. Here's custom CMakeLists.txt we use to build OpenSceneGraph across platforms (excluding iOS).
Certain examples use other libraries like Mongoose and libpng-android to achieve specific functionality. Those libraries are part of corresponding examples, too.
Building
Each example contains four implementations to cover all supported platforms:
- desktop (Linux, macOS, Windows)
- android
- ios
- web
Let's see how to build the first example for each platform.
Notes:
- you must have OpenSceneGraph sources alongside this repository
- you must have mongoose, libpng-android sources alongside this repository, too, for certain examples
Desktop
To build the first example, run the following commands:
cd 01.EmbedResource/desktop
mkdir build
cd build
cmake ..
make
To launch the first example, run the following command:
./ex01-embed-resource
Android
Notes:
- Android project is built for
armeabi-v7a
architecture by default- update
abiFilters
value inandroid/app/build.gradle
if you want other platforms
- update
- make sure to run
Tools -> Android -> Sync Project with Gradle Files
in Android Studio after opening a project, this is necessary for Android Studio to create internal project files
To build and run the first example for Android, open
01.EmbedResource/android
in Android Studio and run the project.
iOS
To build and run the first example for iOS, open
01.EmbedResource/ios/ex01.xcodeproj
in Xcode and run the project.
Web
To build the first example for web, run the following commands:
cd 01.EmbedResource/web
mkdir build
cd build
cmake -DCMAKE_TOOLCHAIN_FILE=/path/to/emsdk/emscripten/<version>/cmake/Modules/Platform/Emscripten.cmake ..
make
Notes:
- you must have Emscripten installed (see Emscripten documentation for details)
- make sure to specify path to Emscripten's CMake toolchain file
To launch the first example, open ex01-embed-resource.html
file in Firefox.
To launch the example in any web browser, you need to serve example files with a web server.
Serving example with Python web server
If you have have Python installed, here's what you need to do:
-
serve example with a web server:
cd 01.EmbedResource/web/build python -m SimpleHTTPServer
-
open http://localhost:8000 in any web browser
-
select
ex01-embed-resource.html
file
Examples
01. Embed resource into executable
Learn how to embed a binary resource into application with xxd
Unix utility
and use the resource across platforms.
02. Use PNG images with PNG plugins
Learn how to use PNG images across platforms with PNG plugins.
03. Implement HTTP client to perform GET/POST requests
Learn how to implement HTTP client across platforms to perform GET/POST requests.
04. Debug application remotely
Learn how to work with debug-broker to perform remote debugging.
05. Node selection
Learn how to select a node.
06. Command sequence
Learn how to compose a sequence of asynchronous commands to combine animations with other operations.
Help
Feel free to ask questions in the issues. Your questions help us improve examples.