Depth sorting not working for lines in PDF or SVG export

Created by: PBernalPolo

Description

Rendering lines or spheres on the screen works fine. When we render spheres to PDF or SVG, they are depth sorted properly. However, lines are not depth sorted; they are drawn in the order of declaration.

Expected Behavior

Lines should also be drawn according to their depth ordering (at least with hint(ENABLE_DEPTH_SORT) enabled).

Current Behavior

Lines are currently drawn according to their declaration order (even with hint(ENABLE_DEPTH_SORT) enabled).

Steps to Reproduce

Comment/uncomment each line that appears in draw().

import processing.pdf.*;
import processing.svg.*;


void setup()
{
  size( 500 , 500 , P3D );
  hint( ENABLE_DEPTH_SORT );
}


void draw()
{
  // Choose one:
  //drawToScreen();
  drawToPDF();
  //drawToSVG();
}


void drawToPDF()
{
  // Here we generate the PDF document.
  beginRaw( PDF , "output.pdf" );
  drawMyStuff();
  endRaw();
  exit();
}


void drawToSVG()
{
  // Here we generate the SVG image.
  beginRaw( SVG , "output.svg" );
  drawMyStuff();
  endRaw();
  exit();
}


void drawToScreen()
{
  // Here we just draw to the screen.
  drawMyStuff();
}


void drawMyStuff()
{
  background(255);
  lights();
  strokeWeight( 50 );
  
  // First we draw the line that should be shown on top (black).
  stroke( 0 , 0 , 0 );
  line( 250 , 50 , 100 , 250 , 450 , 100 );
  
  // Then the line that should be shown behind (red).
  stroke( 255 , 0 , 0 );
  line( 50 , 250 , -100 , 450 , 250 , -100 );
  
  stroke( 0 , 0 , 0 );
  strokeWeight( 1 );
  
  // First, draw a green sphere that should appear on top.
  pushMatrix();
  fill( 0 , 255 , 0 );
  translate( width*4/10 , height*4/10 , 50 );
  sphere( 70 );
  popMatrix();
  
  // Then draw a blue sphere that should appear behind.
  pushMatrix();
  fill( 0 , 0 , 255 );
  translate( width*3/10 , height*3/10 , -50 );
  sphere( 70 );
  popMatrix();
}

Your Environment

• Processing version: 4.3
• Operating System and OS version: ubuntu 22.04

Commencez par exécuter le sketch Processing 4.3 fourni sur Ubuntu 22.04 et comparez les sorties écran, PDF et SVG avec ENABLE_DEPTH_SORT activé. Suivez la manière dont les lignes sont soumises et triées par profondeur dans les chemins d’exportation PDF et SVG, puis vérifiez que les lignes qui se chevauchent respectent leur ordre de profondeur tandis que le comportement existant de la sphère reste inchangé.