4.42.1 Top new questions this week

4.42.1.1 Implementing a planetary terrain generation algorithm

https://mathematica.stackexchange.com/questions/158843/implementing-a-planetary-terrain-generation-algorithm

 
From this (now deleted) question I found this site where the author discusses a simple technique for random terrain generation on a sphere. 
 
The method discussed is as follows: 
 
 
start with a  ...
 

- asked by b3m2a1 (18 votes), answered by b3m2a1 (19 votes)

4.42.1.2 Performance of Select

https://mathematica.stackexchange.com/questions/158583/performance-of-select

 
I have a data set of about 4*10^6 3d-coordinates. 
 
From this volume I am sequentially selecting coordinates along one axis and manipulating this subset. 
 
My question: can the Select function be  ...
 

- asked by mrz (15 votes), answered by kglr (23 votes)

4.42.1.3 Create a simple split tree

https://mathematica.stackexchange.com/questions/158858/create-a-simple-split-tree

 
I am trying to create a simple split tree. 
 
 
 
The growth should be only upwards, the vertical element length constant (1), the size of the horizontal bars should be halved in each iteration and the  ...
 

- asked by Niki (12 votes), answered by m_goldberg (10 votes)

4.42.1.4 Easy printing of executable code

https://mathematica.stackexchange.com/questions/158901/easy-printing-of-executable-code

 
I'm working on a package that has functions that call other existing and packaged functions.  I'd like a way to output what some of those key calls are, so users can see what's happening under the  ...
 

- asked by Chris K (9 votes), answered by Szabolcs (10 votes)

4.42.1.5 Two bouncing balls in 1 dimension, issues with two different methods?

https://mathematica.stackexchange.com/questions/158857/two-bouncing-balls-in-1-dimension-issues-with-two-different-methods

 
I'm trying to simulate 2 balls with the same mass and diameter bouncing one on top of another under gravity, see the illustration below (not ideal, but this is the best result I've got so far, the  ...
 

- asked by Yuriy S (8 votes), answered by b3m2a1 (7 votes)

4.42.1.6 Receive macOS notification when evaluation finishes

https://mathematica.stackexchange.com/questions/158898/receive-macos-notification-when-evaluation-finishes

 
Is Mathematica able to communicate with macOS's native Notification Center in order to notify me if an evaluation finishes in any of my open notebooks? 
 
I'm looking for a solution similar to this one  ...
 

- asked by Casimir (8 votes), answered by Szabolcs (12 votes)

4.42.1.7 Why does repeated export of JPG-Images consume all memory?

https://mathematica.stackexchange.com/questions/158690/why-does-repeated-export-of-jpg-images-consume-all-memory

 
I was looking in the history of asked questions for similar questions, but none of the alike questions answered my problem sufficiently. So I ask nevertheless. 
 
My system memory is leaked by simple  ...
 

- asked by sacratus 8votes