Lost in Space PGraphics Exploration

[glv]

Hello folks!

Some simple and fun code exploring PGraphics.

// Author: GLV
// Date: 2026-03-01

// Description: 
// Some fun with PGraphics

// Watch while listening to:
// https://open.spotify.com/track/1i2HCDqbRb6onboeRJmPhQ?si=1f77bee27f554d1f

float yaw, pitch, roll;
int counter;
color col;

PGraphics pg3d, pglis;

PImage lisBackground;

PImage lis(int numStars)
  {  
  pglis.beginDraw();
  pglis.background(0);  // black
  
  pglis.stroke(255);
    
  for(int i=0; i<numStars; i++)
    {
    pglis.strokeWeight(random(1, 4));
    pglis.stroke(random(128, 255));
    pglis.point(random(pglis.width), random(pglis.height));  
    }
    
  pglis.endDraw(); 
  return pglis.get();  
  }

void pg3dUpdate(float yaw, float pitch, float roll, color col, float s)
  {
  //pg3d.smooth(4); // smooth() can only be used before beginDraw()
  
  pg3d.beginDraw();
  //pg3d.background(0, 20);  // A bit of transparencey for testing
  //pg3d.background(0);    // Black
  pg3d.clear();  
    
 pg3d.push();
  pg3d.translate(pg3d.width/2, pg3d.height/2); // origin at center of PGraphic pg3d
  pg3d.lights();

  pg3d.fill(col);
  pg3d.noStroke();

  pg3d.rotateY(-HALF_PI);        // For model alignment. 
  pg3d.rotateY(radians(yaw));    // yaw
  pg3d.rotateZ(radians(pitch));  // pitch
  pg3d.rotateX(radians(roll));   // roll
  
  pg3d.box(s*90, s*10, s*40);    // Long along x-axis; later rotated to point "forward"
 pg3d.pop();
    
  pg3d.endDraw();
  }

void setup()
  {
  size(800, 800, P3D);
    
  surface.setLocation(10, 10); // Fixes occasional issue of not displaying!
  surface.setTitle("Lost in Space");
  
  pg3d = createGraphics(300, 300, P3D); // 3D box
  
  pglis  = createGraphics(width, height, P2D); // stars 
  lisBackground = lis(500); // Make background of stars
   
  // Debug
  println("pg3d width: ", pg3d.width);
  println("pg3d height:", pg3d.height);
  println("lis width: ",  pglis.width);
  println("lis height:",  pglis.height);
  println("width: ",      width);
  println("height:",      height);   
  } 

float a, d;

void draw()
  {
  background(lisBackground);
  //image(lisBackground, 0, 0);
   
  if(frameCount%10 == 0)
    {
    a = random(120, 255);
    d = random(2, 4);  
    }
 pushStyle(); 
  noStroke();
  fill(255, 255, 255, a);
  ellipse(width/2, height/2, d, d);
 popStyle();      
          
  if(frameCount < 3*60) 
    {
    textSize(96);
    textAlign(CENTER, CENTER);
    text("Lost in Space", width/2, height/2);
    
  // Fixed:
    col = color(255, 255, 0);
    pg3dUpdate(90, 30, 30, col, 2); // Updates pg3D
    imageMode(CENTER);  
    image(pg3d, width/2, 200);  // Centers it middle top    
    
    return; // Start after 3 seconds
    }  
    
  ypr(); // yaw, pitch roll controls
  counter++; 
      
//// Fixed:
//  col = color(255, 255, 0);
//  pg3dUpdate(yaw, pitch, roll, col, 2); // Updates pg3D
//  imageMode(CORNER);  
//  image(pg3d, 10, 10);  // Centers it upper left
  
 // Mouse moves:
  col = color(0, 255, 0);
  pg3dUpdate(yaw, pitch, roll, col, 2); // Updates pg3D
  imageMode(CENTER);
  image(pg3d, mouseX, mouseY);  // Move with mouse
  
 push();
  translate(width/2, height/2);
  float x = 250*cos(counter*(TAU/(4*360)));
  float y = 250*sin(counter*(TAU/(4*360)));
  col = color(255, 0, 0);
  pg3dUpdate(yaw, pitch, roll, col, 1); // Updates pg3D
  imageMode(CENTER);
  image(pg3d, x, y);
  
  col = color(0, 255, 255);
  pg3dUpdate(-yaw, pitch, roll, col, 1); // Updates pg3D
  imageMode(CENTER); 
  image(pg3d, -x, -y);
 pop();
  
  }

// // yaw, pitch roll controls

void ypr()
  {
  yaw =   counter%(4*360);            //Max is 4*360 4 revolutions
  pitch = 30*sin(counter*(TAU/720));
  roll =  30*sin(counter*(TAU/120));
  }

:)