11.49.3 Can you answer these questions?

11.49.3.1 Making a arrow in Tikz increasing thickness

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748553

I can figure out how to make an arrow like this in Tikz? 
Is there a package that can help me? 
[tikz-pgf] [tikz-arrows] [arrows]
 

asked by Jakob Christian Kruse https://tex.stackexchange.com/landing/r/digest?cta=user&id=311992 Score of 2

answered by kabenyuk https://tex.stackexchange.com/landing/r/digest?cta=user&id=204924 Score of 0

11.49.3.2 3D Sphere in MetaPost

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748275

I have drawn a top-down view of a sphere in MetaPost. 
Is there a way that is native to MetaPost in which I can rotate the sphere, or look at it from a different angle? 
This is my current picture: 
and ... 
[3d] [metapost]
 

asked by Jasper https://tex.stackexchange.com/landing/r/digest?cta=user&id=319072 Score of 2

11.49.3.3 How to pass a label list to lua in lualatex?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748245

I want to pass a label list, similar to what is passed to \ref to lua in lualatex. 
Here is what I have: 
\documentclass{article} 
\usepackage{luacode} 
\newcommand{\liref}[3]{% 
\directlua{ 
... 
[luatex]
 

asked by HerpDerpington https://tex.stackexchange.com/landing/r/digest?cta=user&id=82853 Score of 1