# SMI2023-ReprStamp
This is a version of https://github.com/pmagillo/PathChecker created for applying to the Replicability Stamp of SMI2023

This repository contains the code and instructions to create the images in Figures 11, 12, 14, 15 of the paper

  "Crossing-free paths in the square grid"
  Lidija Comic, Paola Magillo

accepted for Solid Modeling International (SMI), Genova, Italy, July 2023 and to appear in Computers and Graphics

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CREATION OF FIGURES 11, 12, 14

Figures 11, 12, 14 contain images created with our demo program (https://github.com/pmagillo/PathChecker).
That demo is interactive, but for the replicability test we have developed here a version that can be invoked from a script, without user interaction.

The source code is in Java. 
It needs the Java SE Development Kit which can be downloaded from
http://www.oracle.com/
and the direct link for downloading is
https://urlsand.esvalabs.com/?u=https%3A%2F%2Fwww.oracle.com%2Fjava%2Ftechnologies%2Fdownloads%2F%23jdk20-windows&e=ed7a584b&h=a2cec789&f=y&p=y 
We have tested it on a Windows system, but it should work equally on a Linux system, or any system where the Java SE Development Kit is installed.

Instructions:
- before starting, you may need to set the classpath for Java:
  if you are using the Windows Powershell, type: $env:CLASSPATH += ";."
  if you are using the Command Prompt, type: set classpath=%classpath%;.
- compile the java program: the needed commands are contained in the script  script_compile.bat
- generate the images: the needed commands are contained in the script  script_fig.bat

Note: since this program is a modification of the interactive demo, for a moment you will see the graphic window of the demo, that immediately disappears after saving the image.

The generated images are:
figure11_a.png  figure11_b.png  figure11_c.png
figure12_a.png  figure12_b.png  figure12_c.png	figure12_d.png
figure14_a.png  figure14_b.png  figure14_c.png
which correspond to the various parts of Figures 11,12,14.

The script generates just the raw images, in the paper we have manually superimposed letters and symbols used to explain the images in the caption.

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CREATION OF FIGURE 15

This figure contains two plots, that have been generated in two steps:

1) A Python program generates the data and creates a MatLab program.
2) Then MatLab, executing such program, will create an image with the plots.

--Instructions for Step 1
We executed the Python program on a native Linux system, where Python is installed as python3. From the terminal, type:

  python3  creaFig_a.py

this will create the file  creaFig_b.m  which is a MatLab program (a text file with extension .m containing MatLab commands).

--Instructions for Step 2
This step needs MatLab. We have run it on a Windows system, but it can be executed on any system where MatLab is installed.

Intructions:
open MatLab, load  creaFig_b.m  and run it. It will produce an image, and you need to manually save it.
 
Note: Step 1 generates random data. Therefore the generated plots cannot be perfectly equal to the ones in Figure 15 of the paper, but they will be 
very similar.