Syphon and Camera

Stanlepunk

Hello all,

I try to send to the syphon an image with a particular background with transparency and in my case I use camera too. But I have a problem with the background when I use the syphon library. I prepare a code to understand the problem, but the problem stay and i don't find the solution. To illustrate the problem i make a boolean with syphon and other one without syphon. I test with Processing 2.0.3 and 2.1, on mac 10.7.5.

//SYPHON
import codeanticode.syphon.*;
PGraphics miroir ;
SyphonServer server ;
boolean syphon ;

void setup() {
  size(800,800,P3D) ;
  // Create syhpon server to send frames out.
  backgroundP3Dsetup() ;
  miroir = createGraphics(800, 800, P3D);
  server = new SyphonServer(this, "Processing Syphon");
}

int c   ;
int deep ;
void draw() {
  c += 1 ;
  if (c>255) c = 0 ;
  color colorBG = color(c, 10) ;
  deep += 10 ;
  if(deep>500) deep = -500 ;

  //to activate the syphon or not
  syphon = true ;

  if(syphon) {
    println("Syphon on") ;

    //syphon
    miroir.beginDraw() ;
    //background
    backgroundSyphonP3D(colorBG)  ;
    //camera
    pushMatrix() ;
    miroir.camera() ;
    miroir.beginCamera() ;
    //transformation
    miroir.translate(width/2, height/2,deep) ;
    miroir.rotateX(radians(mouseY)) ;
    miroir.rotateY(radians(mouseX)) ;
    //drawing
    miroir.strokeWeight(1) ;
    miroir.stroke(255) ;
    miroir.fill(0) ;
    miroir.box(200) ;
    //camera stop
    popMatrix() ;
    miroir.endCamera() ;
    //syphon stop
    miroir.endDraw() ;
    //display the result
    image(miroir,0,0) ;
    //send to syphon
    server.sendImage(miroir);

 } else {
    println("Syphon off") ;
    //background
    backgroundP3D(colorBG)  ;
    //camera
    pushMatrix() ;
    camera() ;
    beginCamera() ;
    //tranformation
    translate(width/2, height/2,deep) ;
    rotateX(radians(mouseY)) ;
    rotateY(radians(mouseX)) ;
    //drawing
    strokeWeight(1) ;
    stroke(255) ;
    fill(0) ;
    box(200) ;
    //stop camera
    popMatrix() ;
    endCamera() ;

  }
}

//P3D
//BACKGROUND
////////////
PVector sizeBG ;
void backgroundP3Dsetup() {
  float ratio = 100 ; 
  sizeBG = new PVector(width *ratio, height *ratio, height *7) ;
}
//syphon background
void backgroundSyphonP3D(color c) {
  miroir.fill(c) ;
  miroir.noStroke() ;
  pushMatrix() ;
  miroir.translate(-sizeBG.x *.5,-sizeBG.y *.5 , -sizeBG.z) ;
  miroir.rect(0,0, sizeBG.x,sizeBG.y) ;
  popMatrix() ;
}
//classic
void backgroundP3D(color c) {
  fill(c) ;
  noStroke() ;
  pushMatrix() ;
  translate(-sizeBG.x *.5,-sizeBG.y *.5 , -sizeBG.z) ;
  rect(0,0, sizeBG.x,sizeBG.y) ;
  popMatrix() ;
}

codeanticode

The problem with the syphon code is that you are not calling push/popMatrix on the PGraphics object:

//SYPHON
import codeanticode.syphon.*;
PGraphics miroir ;
SyphonServer server ;
boolean syphon ;

void setup() {
  size(800,800,P3D) ;
  // Create syhpon server to send frames out.
  backgroundP3Dsetup() ;
  miroir = createGraphics(800, 800, P3D);
  server = new SyphonServer(this, "Processing Syphon");
}

int c   ;
int deep ;
void draw() {
  c += 1 ;
  if (c>255) c = 0 ;
  color colorBG = color(c, 10) ;
  deep += 10 ;
  if(deep>500) deep = -500 ;

  if(syphon) {
    //syphon
    miroir.beginDraw() ;
    //background
    backgroundSyphonP3D(colorBG)  ;
    //camera
    miroir.pushMatrix() ;
    miroir.camera() ;
    miroir.beginCamera() ;
    //transformation
    miroir.translate(width/2, height/2,deep) ;
    miroir.rotateX(radians(mouseY)) ;
    miroir.rotateY(radians(mouseX)) ;
    //drawing
    miroir.strokeWeight(1) ;
    miroir.stroke(255) ;
    miroir.fill(0) ;
    miroir.box(200) ;
    //camera stop
    miroir.popMatrix() ;
    miroir.endCamera() ;
    //syphon stop
    miroir.endDraw() ;
    //display the result
    image(miroir,0,0) ;
    //send to syphon
    server.sendImage(miroir);

 } else {
    //background
    backgroundP3D(colorBG)  ;
    //camera
    pushMatrix() ;
    camera() ;
    beginCamera() ;
    //tranformation
    translate(width/2, height/2,deep) ;
    rotateX(radians(mouseY)) ;
    rotateY(radians(mouseX)) ;
    //drawing
    strokeWeight(1) ;
    stroke(255) ;
    fill(0) ;
    box(200) ;
    //stop camera
    popMatrix() ;
    endCamera() ;

  }
}

void keyPressed() {
  //to activate the syphon or not
  syphon = !syphon;
  if (syphon) println("Syphon on");
  else println("Syphon off");

}

//P3D
//BACKGROUND
////////////
PVector sizeBG ;
void backgroundP3Dsetup() {
  float ratio = 100 ; 
  sizeBG = new PVector(width *ratio, height *ratio, height *7) ;
}

//syphon background
void backgroundSyphonP3D(color c) {
  miroir.fill(c) ;
  miroir.noStroke() ;
  miroir.pushMatrix() ;
  miroir.translate(-sizeBG.x *.5,-sizeBG.y *.5 , -sizeBG.z) ;
  miroir.rect(0,0, sizeBG.x,sizeBG.y) ;
  miroir.popMatrix() ;
}
//classic
void backgroundP3D(color c) {
  fill(c) ;
  noStroke() ;
  pushMatrix() ;
  translate(-sizeBG.x *.5,-sizeBG.y *.5 , -sizeBG.z) ;
  rect(0,0, sizeBG.x,sizeBG.y) ;
  popMatrix() ;
}

Stanlepunk

Thanks for the answer, sorry I'm very late to answer, but I don't receive notification from the forum. The problem is resolve now.