errors in 'Prototyping Augmented Reality' book

poserpro

errors in 'Prototyping Augmented Reality' book

in Contributed Library Questions • 1 year ago

I downloaded the sample files from http://as.wiley.com/WileyCDA/WileyTitle/productCd-1118036638,miniSiteCd-SYBEX,descCd-DOWNLOAD.html ( chapter 6 is all we need to download )

for this book titled 'Prototyping Augmented Reality' by T. Mullen, but when I run it, it shows some errors and I can't seem to solve this.

Could any Processing guru gives a hint how to fix it.

Thanks in advance.

-poserpro

/** NyARToolkit for proce55ing/0.3.0
(c)2008-2010 nyatla
airmail(at)ebony.plala.or.jp

MultiMarker + MultiMarkerMarker by
Charl P. Botha < http://cpbotha.net/>
*/

import codeanticode.gsvideo.*;
import jp.nyatla.nyar4psg.*;
import processing.opengl.*;
import saito.objloader.*;

GSCapture cam;
MultiMarker nya;
OBJModel annie ;
PFont font;
PVector move;
PVector xypos;

OBJModel[] anim;
int animFrames = 20;
int animFrame;
boolean animOn= true;
float turn = 0.0;
float prevangle = 0.0;

void setup() {
size(800,600,OPENGL);
colorMode(RGB, 100);
font=createFont("FFScala", 32);
cam=new GSCapture(this,width,height);
String[] patts = {"samarker16.pat", "walkmarker16.pat", "turnmarker16.pat"};
double[] widths = {80,80,80};
nya=new MultiMarker(this,width,height,"camera_para.dat",NyAR4PsgConfig.CONFIG_PSG);
print(nya.VERSION);

nya.gsThreshold=120;//(0<n<255) default=110 ....................error
nya.cfThreshold=0.4;//(0.0<n<1.0) default=0.4 ....................error

int i;
String filename = "";
anim = new OBJModel[animFrames];

for(i = 1; i <= animFrames; i++){
if(i < 10){
filename = "shootinannie-superlowpoly-tri_00000" + i + ".obj";
}else{
filename = "shootinannie-superlowpoly-tri_0000" + i + ".obj";
}
anim[i-1] = new OBJModel(this, filename, "relative", TRIANGLES);
anim[i-1].enableDebug();
anim[i-1].scale(15);
anim[i-1].translateToCenter();
anim[i-1].enableTexture();
}
xypos = new PVector(0, 0);
move = new PVector(0, -1);
}

void drawMarkerPos(int[][] pos2d)
{
textFont(font,10.0);
stroke(100,0,0);
fill(100,0,0);

for(int i=0;i<4;i++){
ellipse(pos2d[i][0], pos2d[i][1],5,5);
}

fill(0,0,0);
for(int i=0;i<4;i++){
text("("+pos2d[i][0]+","+pos2d[i][1]+")",pos2d[i][0],pos2d[i][1]);
}
}

void draw() {
if (cam.available() !=true) {
return;
}

background(255);
cam.read();
hint(DISABLE_DEPTH_TEST);
image(cam,0,0);

if (nya.detect(cam)) //....................error
{
for (int i=0; i < nya.markers.length; i++)
{
if (nya.markers[i].detected)
{
drawMarkerPos(nya.markers[i].pos2d);
}
}
if(nya.markers[1].detected){
animOn = true;
}else{
animOn = false;
}

hint(ENABLE_DEPTH_TEST);

PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;

if (nya.markers[0].detected){
nya.markers[0].beginTransform();
noStroke();
rotateX(radians(-90));

if(nya.markers[2].detected){
turn = nya.markers[2].angle.z;
rotate2D(move, turn-prevangle);
prevangle = turn;
}

translate(xypos.x, xypos.y, 50);
rotateY(turn);

if(animOn){
anim[animFrame].draw();
xypos.add(move);
animFrame++;
if(animFrame == animFrames){
animFrame = 0;
}
}else{
anim[17].draw();
}
nya.markers[0].endTransform();
}
}
}

void rotate2D(PVector v, float theta) {
float xTemp = v.x;
v.x = v.x*cos(theta) - v.y*sin(theta);
v.y = xTemp*sin(theta) + v.y*cos(theta);
}

Replies(14)

proc_tux

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Look:

import codeanticode.gsvideo.*;
import jp.nyatla.nyar4psg.*;
import processing.opengl.*;
import saito.objloader.*;

Have you downloaded this libraries for processing?

If not: Of course theres an error!

poserpro

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Yes, I do have, and can run other scripts without problem.
This scribt show a message ' cannot covert from void to boolean' for the line

if (nya.detect(cam)) .

just how to remedy this ?

Thanks.

-----------------------------------------------------------------------
And, this is the other sample in the book, I run it fine.
-----------------------------------------------------------------------

/** NyARToolkit for proce55ing/0.3.0
(c)2008-2010 nyatla
airmail(at)ebony.plala.or.jp
prototyping Augmented Reality book
*/
import processing.video.*;
import jp.nyatla.nyar4psg.*;
import processing.opengl.*;
import javax.media.opengl.*;
import saito.objloader.*;
Capture cam;
SingleARTKMarker nya;
OBJModel model ;
PFont font;
float rot = 0.0;
void setup() {
size(640,480,OPENGL);
colorMode(RGB, 100);
font=createFont("FFScala", 32);
cam=new Capture(this,width,height);
nya=new SingleARTKMarker(this,width,height,"camera_para.dat",SingleARTKMarker.CS_LEFT);
println(nya.VERSION);
String[] marker={"patt.hiro","patt.kanji"};
nya.setARCodes(marker,80);
nya.setConfidenceThreshold(0.6,0.5);
model = new OBJModel(this, "sa2.obj", "absolute", TRIANGLES);
model.enableDebug();
model.scale(20);
model.translateToCenter();
model.enableTexture();
}
void drawMarkerPos(int[][] points)
{
textFont(font,10.0);
stroke(100,0,0);
fill(100,0,0);
for(int i=0;i<4;i++){
ellipse(nya.pos2d[i][0], nya.pos2d[i][1],5,5);
}
fill(0,0,0);
for(int i=0;i<4;i++){
text("("+nya.pos2d[i][0]+","+nya.pos2d[i][1]+")",nya.pos2d[i][0],nya.pos2d[i][1]);
}
}
String angle2text(float a)
{
int i=(int)degrees(a);
i=(i>0?i:i+360);
return (i<100?" ":i<10?" ":"")+Integer.toString(i);
}
String trans2text(float i)
{
return (i<100?" ":i<10?" ":"")+Integer.toString((int)i);
}
void draw() {
background(255);
if (cam.available() !=true) {
return;
}
cam.read();
hint(DISABLE_DEPTH_TEST);
image(cam,0,0);
hint(ENABLE_DEPTH_TEST);
switch(nya.detect(cam)){
case SingleARTKMarker.ST_NOMARKER:
break;
case SingleARTKMarker.ST_NEWMARKER:
println("Marker appeared. #"+nya.markerid);
break;
case SingleARTKMarker.ST_UPDATEMARKER:
hint(DISABLE_DEPTH_TEST);
drawMarkerPos(nya.pos2d);
hint(ENABLE_DEPTH_TEST);
PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;
nya.beginTransform(pgl);
translate(0,0,10);
if(nya.markerid==0){fill(255,0,0);}else if(nya.markerid==1){fill(0,0,255);}
noFill();
for(int n = 0; n <= 25; n++){
stroke(0,255,0, 50);
ellipse(0,0,100+3*n,100+3*n);
}
fill(255, 0, 255, 50);
ellipse(0, 0, 255, 255);
noFill();
rotateX(radians(90));
stroke(255,255,0);
ellipse(0,0,255,255);
rotateY(radians(90));
ellipse(0,0,255,255);
rotateX(radians(-180));
translate(0,-50,0);
//rotateY(radians(-90));
//stroke(255,200,0);
//fill(100,0,0);
//box(40);
noStroke();
model.draw();
nya.endTransform();
break;
case SingleARTKMarker.ST_REMOVEMARKER:
println("Marker disappeared.");
break;
}
rot = rot + 0.2;
}

proc_tux

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Try:

...

String mystring = "";

mystrring = nya.detect(cam);

println(mystring);

...

OR:

nya.detect(cam) without the if(...) because it seems like the function

doesnt return a value

poserpro

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Thanks. if not too trouble, could you paste a suggested script based on the about original code with your version, I still got errors one after the other.

it is about choosing between 3 marker images to display their corresponding 3D objects on the marker used for Augmented Reality.

Thanks once again.

proc_tux

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Sorry, cant try that, because i havent got a webcam.
Try the sketches with a further version of procressing (1.5.1).

poserpro

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

OK. But I do use this version.
The first 2 errors have been addressed cause they are not part of the methods according to the reference document of MultiMarker; with or without web-cam, now only this issue has to be figured out :

if (nya.detect(cam)) //....................error

'cam' has been set up as void, and this if statement turns it into a boolean, and Processing sends me a error cannot covert from void to boolean, yet it is necessary to judge the situation with "if ' statement so as to change the resultant object it shows before the cam.

proc_tux

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Sorry, but my English isnt the best, its hard

for me to understand

1) Like I wrote in your other thread, try the newest version of Processing,

2) model = new OBJModel(this, "sa2.obj", "absolute", TRIANGLES);

Have you this obj file in your data dictionary? (dictionary -> right?)

3) Maybe cam isnt intialized right? But then it should be null...

4) Is your cam turned on?

5) Does other Processing examples with webcams work?

Maybe Processing cant find it.

proc_tux

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

if((boolean) nya.detect(cam))

{

...

}

?????????????????????

poserpro

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Still doesn't work. Guess I have to give up the thought now. ;(

PhiLho

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

proc_tux, if nua.detect(cam) is declared with void type, it won't return anything, so casting won't work either.
poserpro, you probably use a library updated, more recent than the one used in the book. You have to look at the documentation of the library, perhaps its JavaDoc, and see how this method is used.

poserpro

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

if (nya.detect(cam))

this script works in other similar process code without problem, but in ts one, it just creates problem.
Philho http://philho.deviantart.com/, nice to see you again, since Poser .;P

PhiLho

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

Above, you report that a code using switch(nya.detect(cam)) works. This suggests that nya.detect() doesn't return a boolean (necessary in if(nya.detect()) form) but an int (or perhaps an enum).
This doesn't correspond to the error you report (void instead of boolean) but it remains logical.
You might want to try a similar switch instead or something like if (nya.detect(cam) == SingleARTKMarker.ST_NEWMARKER)
Note: I know nothing about this library!
Perhaps they went from a simple true/false result to something more nuanced, and forgot to update this example.

poserpro

Re: errors in 'Prototyping Augmented Reality' book

1 year ago

OK. thanks for the advice.

andarkmat..

Re: errors in 'Prototyping Augmented Reality' book

11 months ago

I am having a problem with same exercise,

The only way that I can run the sketch is by deleting the beginTransform() and endTransform() commands if I don't the next message pop up: java.lang.RuntimeException: beginTransform() only supported by P3D and OPENGL renderers

once deleted the program runs but the 3D object is not linked to the Markers :(

Please help

Thanks

Top Reply