update README

README

@@ -1,32 +1,31 @@
 
 Work in progress orbital shipping game
 
+
 Dependencies:
 	libTangerine: https://gitlab.com/cinnaboot/tangerine
-	Catch2 (for tests):
-		https://github.com/catchorg/Catch2/blob/devel/docs/Readme.md
+	imgui: https://github.com/ocornut/imgui
 
-TODO:
-	add GUI to demo application for modifying orbit parameters
-	add equations for parabolic and hyperbolic trajectories
-	make algorithm for Hohmann transfer orbits
-	you know, make the actual game
+	SDL2: https://www.libsdl.org/index.php
+	glew: https://www.opengl.org/sdk/libs/GLEW/
+	glm: https://github.com/g-truc/glm
+	Catch2 (only for tests): https://github.com/catchorg/Catch2
 
 Building:
 	install dependencies for your environment:
-		Arch) $ sudo pacman -S assimp glew glm sdl2 catch2 gcc make
+		Arch) $ sudo pacman -S glew glm sdl2 catch2 gcc make
+
 		Fedora) $ sudo dnf install glew-devel glm-devel SDL2-devel \
 			catch-devel gcc-c++ make cmake
-			NOTE: fedora (33) see note below about assimp
+
 	checkout, and initialise submodule dependencies:
 		$ git submodule update --init --recursive
+
 	build:
 		$ make
 
-	binaries will be in ./bin
-
-	NOTE: if you get errors regarding assimp when building, you can build a
-		recent version of assimp by passing USE_INTERNAL_ASSIMP=y to make
+		optionally)
+		$ make tests
 
-		$ USE_INTERNAL_ASSIMP=y make
+	binaries will be in ./bin