Im trying to port some processing code to shader code to generate a "magic eye" image out of a pattern and a depthmap. The working source code of the processing sketch can be found here: http://kobe.bplaced.net/processing/projekte/magischesAuge/Hai/.

This is the processing source code of the ported shader example:

1. PShader basic;
2. PImage hai, pattern;
3. PGraphics haiGraph, patternGraph;
4. boolean enabled = true;
5. void setup() {
6.   size(1260, 600, P2D);
7.   hai = loadImage("hai_grey.png"); 
8.   pattern = loadImage("hai_pattern.png");
9.   haiGraph = createGraphics(hai.width, hai.height, P2D);
10.   patternGraph = createGraphics(pattern.width, pattern.height, P2D);
11.   basic = loadShader("fragment.glsl");
12.   basic.set("patternSampler", patternGraph);
13.   basic.set("haiSampler", haiGraph);
14. }
15. void draw() {
16.   background(40);
17.   haiGraph.beginDraw();
18.   haiGraph.image(hai, 0, 0);
19.   haiGraph.endDraw();
20.   patternGraph.beginDraw();
21.   ;
22.   patternGraph.image(pattern, 0, 0);
23.   patternGraph.endDraw();
24.   //int fr=frameCount;
25.   //basic.set("frame", fr);
26.   fill(100);
27.   if (enabled == true) {
28.     shader(basic);
29.     println("shader");
30.   }
31.   image(haiGraph, 0, 0);
32.   println(frameRate);
33. }
34. void mousePressed() {
35.   enabled = !enabled;
36.   if (!enabled == true) {
37.     resetShader();
38.   }
39. }

Why is this sketch not running on Emulator?

1. void setup() {
     size(480, 800, P3D);
   }
   void draw() {
     background(0);
    
     translate(width/2, height/2, -200);
     box(100);
   }
   

Why is this Code not working in JavaScript Mode?

1. PImage foto;//deklariert die Variable foto;
   float [] [] grau;
   
   void setup() {
     size(400, 400);
     grau = new float [400] [400]; //hier wird ein zweidimensionales Array deklariert
     foto = loadImage("blume.jpg");//weist der Variablen foto die datei blume.jpg zu
     foto.loadPixels(); //sollte man aufrufen, bevor man die einzelen Pixel bearbeitet
     //foto.pixels=sort(foto.pixels);//wird diese Funktion aktiviert, werden die Farben sortiert ausgegeben
     for (int gridX = 0; gridX < foto.width; gridX++) {
       for (int gridY = 0; gridY < foto.height; gridY++) {
         // überträgt die Farbinfo eines Pixels auf die Variable farbe
         //color farbe = foto.pixels[gridY*foto.width+gridX];
         color farbe = foto.get(gridX,gridY);
         // wandelt die Farbinfo in einen Grauwert um
         float grauwert =red(farbe)*0.222+green(farbe)*0.707+blue(farbe)*0.071;
        // println(grauwert);
         grau [gridX] [gridY] = grauwert;//speichert den Grauwert in unser Array grau
       }
     }
   }
   
   void draw() {
     background(0);
     //image(foto,0,0);// gibt einen netten Überlagerungseffekt
     //jetzt wird nur für jedes 10 Pixel der Helligkeitswert ausgelesen.
     for (int gridX = 0; gridX < foto.width; gridX+=10) {
       for (int gridY = 0; gridY < foto.height; gridY+=10) {
         fill(grau [gridX] [gridY]);//gibt den Grauwert aus unserem Array aus
         ellipse (gridX,gridY,9,9);
       }
     }
   }
   

Any Ideas?

Why is this old code not working any more in Processing 2.08a?

I always get an error:

cannot convert from PGL to GL

1. PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;         // processings opengl graphics object
     GL gl = pgl.beginGL();                // JOGL's GL object
     gl.glEnable( GL.GL_BLEND );
     gl.glEnable(GL.GL_LINE_SMOOTH);  
   
   
     // This fixes the overlap issue
     gl.glDisable(GL.GL_DEPTH_TEST);
   
     // Define the blend mode
     gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE);
   
     stars.drawStars(gl);
     flock.run(gl);
   
     gl.glDisable(GL.GL_BLEND);
     pgl.endGL();

I am working on a sketch, based on the flocking algorithm from daniel shiffman. I extended the code to work in 3D. Thats all working fine, so far. I wanted to make a sketch with a swarm of fish, and fish don't swim with their stomachs up. My fish do. So i really can not figure out, how to rotate the model to avoid the "dead fish" behavior.

Thanks Thomas!

1.  PVector modelOrientation = new PVector(0, 0, 1);
       PVector heading=new PVector(vel.x, vel.y, vel.z);
       heading.normalize();
      
       float angle = acos(modelOrientation.dot(heading));
       PVector axis = modelOrientation.cross(heading);
       pushMatrix();
   
       translate(loc.x, loc.y, loc.z);
       rotate(angle, axis.x, axis.y, axis.z);
       flockFish.draw();
       popMatrix();
   

does anybody know why this code runs perfectly in standard mode, but does not in JavaScript mode?

1. PShape austria;
2. void setup() {
3.   size(1000, 600);
4.   austria = loadShape("Map_of_Austria.svg");
5. }
6. void draw() {
7.   background(255);
8.   println(austria.getChildCount());
9.   for (int i=0; i<austria.getChildCount(); i++) {
10.     austria.getChild(i).disableStyle();
11.     fill(i*20);
12.     shape(austria.getChild(i), 0, 0);
13.   }
14. }

thnaks, thomas

hallo processing users.

i have the following problem: i want to create a sketch, where i can zoom in (with scale) and while i zoomed in, i would like to save the whole picture (with its high scaled resolution) to a file.

is this easy to do? how would you do it?


thank for your answer!

can anyone help me out with some  code that makes it possible to resume a processing sketch on android, which has been put to onPause()?

my problem: if i hit the home button (get to the desktop of the device) and then hold down the home-button, i get a list running apps (onPause, i, guess). when i select the processing-app then, my phone just shows a black screen!

any ideas?

thanks!!!

i made up a very simple facebook app-site-skeleton with a login-button. this works well an i am able to display the name and uid in the browser window.

1. function login(){
2.                 FB.api('/me', function(response) {
3.                     document.getElementById('login').style.display = "block";
4.                     document.getElementById('login').innerHTML = response.name+ response.id + " succsessfully logged in!";
5.                 });

now i try to get that uid into a processing sketch, which should run on the same site as an applett.

how can i do that?

thanks.