> For the complete documentation index, see [llms.txt](https://yayapipi.gitbook.io/hypnotic-streamlines-animation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yayapipi.gitbook.io/hypnotic-streamlines-animation/limitation-and-bug/scr-streamline-animation-code.md).

# SCR Streamline Animation Code

This page will list the bug list encounter of execute SCR.

## 1. Finding Adjacent List

Note that most of the cases can run correctly in this step, but there has some possibly discover cases will cause the error of finding adjacent list:

**i. Shorthest Streamlines in the frames** 

The short streamlines in the frames may cause the adjacent list order not correct. 

Since the algorithms will miss-matched the shortest Euclidean distance point.

![](https://2623269614-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MfkqTPfO1tvFPgDTJLX%2F-Mhm9ipNfY6uEXeRkcC1%2F-MhmBvwQ1td_N_gJHfLL%2Fimage.png?alt=media\&token=11254f6d-881f-4074-92f6-bcbe353d1994)

**Current Solution:**  Remove the shortest streamlines manually before finding adjacent list.

**Possible Future Solution:**  Add more sampling point on the current streamlines when finding adjacent.

**ii. Streamlines slope angle is nearly 45**

Streamline of the angle nearly 45 will hard to determine this streamlines is vertical or horizontal, and cause the adjacent order wrong.

![](https://2623269614-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MfkqTPfO1tvFPgDTJLX%2F-Mhm9ipNfY6uEXeRkcC1%2F-MhmDJ6HEnJOv5IJhGIx%2Fimage.png?alt=media\&token=3a24c9e4-8f53-4789-b7a4-0116ce5f6833)

**Current Solution:**  Reverse the adjacent order of current streamline when the loop streamlines occurs.

**Possible Future Solution:**  No idea yet.

**Note:** User are able to manually modification the adjacent list by edit the Config file if wrong adjacent list calculate occurs.

## **2**. Streamline Corresponding Problem

**i. Crossing and Reverse Issues**

For the crossing problem, this is cause by the patch of 2 keyframe position is time-varying.

For the reverse problem, this is cause by the streamlines generation points order. Sometime the streamlines point order is upside down.

![Example of Crossing and Reverse Issues GIF](https://2623269614-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MfkqTPfO1tvFPgDTJLX%2F-Mhm9ipNfY6uEXeRkcC1%2F-MhmHR1uXo4BciyKNyMl%2Freverse.gif?alt=media\&token=7fa23730-86ac-472b-9abe-f989d86fe22f)

**Current Solution:** Modified the Config File or Adjust the Streamlines position inside Vpaint

**Possible Future Solution:** 

  1\. Add the constraint of cannot crossing adjacent list

  2\. Determine if the head and tail of the sample points is in reverse position.

## 3. Insertion Streamlines

**i. Boundary Streamlines**

if the current unmatched streamlines is include the boundary streamlines, which means it is unable to interpolation and insert a new streamlines into 2 adjacent streamlines. The program will crash in this condition.

**Possible Future Solution:** 

  1\. Extrapolation the boundary streamlines

  2\. Don't remove the boundary streamlines

## 4. Streamlines Respacing

**(some un-implement yet code)**

* The iteration parameters in the ui panel is not yet set-up.