A place to play with the Magnum rendering engine.
Install the Corrade dependency (part of the Magnum project):
mkdir -p ~/workspace && cd ~/workspace
git clone https://github.com/mosra/corrade.git
cd corrade
mkdir build && cd build
cmake -DCMAKE_INSTALL_PREFIX=/usr ..
make -j
sudo make -j install
Clone the Magnum repository:
mkdir -p ~/workspace && cd ~/workspace
git clone https://github.com/mosra/magnum.git
cd magnum
git checkout v2020.06
Compile Magnum:
mkdir build && cd build
cmake -DCMAKE_INSTALL_PREFIX=/usr -DWITH_SDL2APPLICATION=ON ..
make -j
sudo make -j install
For testing, download the magnum-bootstrap project:
mkdir -p ~/workspace && cd ~/workspace
git clone https://github.com/mosra/magnum-bootstrap.git
cd magnum-bootstrap
git checkout base
Compile magnum-bootstrap:
mkdir build && cd build
cmake ..
make -j
And run our first application:
./src/MyApplication
I know, a black screen is not fun...Other branches of magnum-bootstrap contain
examples with other toolkits such as GLFW or Qt.
References:
Magnum is very modular and comes with optional features that can be enabled on demand.
Next, we're going to execute an example that loads an .obj file. We'll need to
enable the basic obj importer included in Magnum:
cd ~/workspace/magnum/build
cmake -DCMAKE_INSTALL_PREFIX=/usr -DWITH_SDL2APPLICATION=ON -DWITH_ANYIMAGEIMPORTER=ON -DWITH_ANYSCENEIMPORTER=ON -DWITH_OBJIMPORTER=ON ..
make -j
sudo make -j install
Now, let's clone magnum-examples, compile, run the viewer example:
mkdir -p ~/workspace && cd ~/workspace
git clone https://github.com/mosra/magnum-examples.git
cd magnum-examples/src/viewer/
mkdir build && cd build
cmake ..
make -j
./magnum-viewer ~/workspace/magnum-examples/src/viewer/scene.obj
You should be able to visualize a cube that can be rotated with the mouse:
References:
Extra Magnum features can be installed via plugins. In this example, we'll load
a glb scene via the TinyGltfImporter contained in magnum-plugins.
Let's clone magnum-plugins:
mkdir -p ~/workspace && cd ~/workspace
git clone https://github.com/mosra/magnum-plugins.git
cd magnum-plugins
git checkout v2020.06
By default, no plugins are compiled, let's enabled the TinyGltfImporter:
mkdir build && cd build
cmake -DCMAKE_INSTALL_PREFIX=/usr -DWITH_STBIMAGEIMPORTER=ON -DWITH_TINYGLTFIMPORTER=ON ..
make -j
sudo make -j install
Let's go back to our viewer example and load a scene with a custom texture:
cd ~/workspace/magnum-examples/src/viewer/build
./magnum-viewer ~/workspace/magnum-examples/src/viewer/scene.glb
You should be able to visualize our well-known monkey that can be rotated with the mouse:
Here's another example with other assets used in Gazebo. Download Magnum.glb
from here: https://www.dropbox.com/sh/xxlv8zfl09p7nbn/AAAvsuPoMcDobAf4dKKTNWdYa?dl=0&preview=Magnum.glb
Then launch the viewer:
./magnum-viewer ~/Downloads/Magnum.glb
The Magnum Player is a very nice example for loading scenes in the browser:
https://doc.magnum.graphics/magnum/magnum-player.html
Click on the Live web version button, and then, drag and drop into the scene
the same glb file used before:
References: