First code added

 - Plugins for communctaions and protobuf message
 - SDF Parser for C#
 - Modules for simulation
 - Realize sensor model, joint control, visual, collisions in 3D simulation environment by SDF specification

.gitignore

@@ -0,0 +1,92 @@
+# Created by https://www.gitignore.io/api/unity
+# Edit at https://www.gitignore.io/?templates=unity
+
+### Unity ###
+# This .gitignore file should be placed at the root of your Unity project directory
+#
+# Get latest from https://github.com/github/gitignore/blob/master/Unity.gitignore
+*/[Ll]ibrary/
+*/[Tt]emp/
+*/[Oo]bj/
+*/[Bb]uild/
+*/[Bb]uilds/
+*/[Ll]ogs/
+*/[Mm]emoryCaptures/
+
+# Never ignore Asset meta data
+!*/[Aa]ssets/**/*.meta
+
+# Uncomment this line if you wish to ignore the asset store tools plugin
+# /[Aa]ssets/AssetStoreTools*
+
+# TextMesh Pro files
+*/[Aa]ssets/TextMesh*Pro/
+*/[Aa]ssets/TextMesh*Pro.meta
+
+# Autogenerated Jetbrains Rider plugin
+*/[Aa]ssets/Plugins/Editor/JetBrains*
+
+# Visual Studio cache directory
+.vs/
+
+# Visual Studio Code user settings
+.vscode/
+
+# Gradle cache directory
+.gradle/
+
+# Autogenerated VS/MD/Consulo solution and project files
+*/ExportedObj/
+.consulo/
+*.csproj
+*.unityproj
+*.sln
+*.suo
+*.tmp
+*.user
+*.userprefs
+*.pidb
+*.booproj
+*.svd
+*.pdb
+*.mdb
+*.opendb
+*.VC.db
+
+# Unity3D generated meta files
+*.pidb.meta
+*.pdb.meta
+*.mdb.meta
+
+# Unity3D generated file on crash reports
+sysinfo.txt
+
+# Builds
+*.apk
+*.unitypackage
+*.symbols.zip
+
+# Crashlytics generated file
+crashlytics-build.properties
+
+# Swap
+[._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+Sessionx.vim
+
+# Temporary
+.netrwhist
+*~
+# Auto-generated tag files
+tags
+# Persistent undo
+[._]*.un~
+
+# End of https://www.gitignore.io/api/unity