Use absolute paths, update readme

README.md

@@ -286,7 +286,6 @@ cd SIBR_viewers_linux
 cmake -Bbuild .
 cmake --build build --target install
 ``` 
-If you receive a build error related to ```libglfw```, locate its library directory on your machine and set up a symbolic link there ```libglfw3.so``` &rarr; ```<your actual liblgfw lib>```. 
 
 ### Navigation in SIBR Viewers
 The SIBR interface provides several methods of navigating the scene. By default, you will be started with an FPS navigator, which you can control with ```W, A, S, D``` for camera translation and ```Q, E, I, K, J, L``` for rotation. Alternatively, you may want to use a Trackball-style navigator (select from the floating menu). You can also snap to a camera from the data set with the ```Snap to``` button or find the closest camera with ```Snap to closest```. The floating menues also allow you to change the navigation speed. You can use the ```Scaling Modifier``` to control the size of the displayed Gaussians, or show the initial point cloud.

arguments/__init__.py

@@ -55,6 +55,12 @@ class ModelParams(ParamGroup):
         self.eval = False
         super().__init__(parser, "Loading Parameters", sentinel)
 
+    def extract(self, args):
+        g = super().extract(args)
+        g.model_path = os.path.abspath(g.model_path)
+        g.source_path = os.path.abspath(g.source_path)
+        return g
+
 class PipelineParams(ParamGroup):
     def __init__(self, parser):
         self.convert_SHs_python = False