Hello,

please post your class Tube (or it's part of shapes3D)


EDITED
oh, I just understood your problem.

1. 
   
2. class Obstacle {
3.  float x,y,z,obHeight,obWidth,velY; 
4.  boolean removeMe=false;
5.  Tube tubo;
6.   PApplet myPApplet;
7.  
8.  Obstacle(PApplet _myPApplet, float _obHeight,float _obWidth) {
9.    obHeight=_obHeight;
10.    obWidth=_obWidth;
11.    myPApplet =    _myPApplet;

and when defining an object Obstacle say

1. ....  new Obstacle(this .............
   

when defining your tube within the class Obstacle say

1.    tubo=new Tube(myPApplet,20,5);

Thus you bring a pointer to your program into the class and use it there freely.

technical faq needed  

Greetings, Chrisir    


If you need an answer, please send me a personal message since this forum doesn't notify.

Tube class' constructor expects 3 parameters:

1. PApplet app
   
2. int nbrSlices
   
3. int nbrSegments

@ line #14, 2nd & 3rd arguments (20, 5) are obviously of int data-type. But 1st argument ( this) isn't!

Keyword this always refers to the class the statement code belongs to. In that case, this = Obstacle class.
To get a PApplet reference, you need a parameter this which comes from the main sketch!

Since class Tube is instantiated inside class Obstacle's constructor;
you have to receive a PApplet reference as an additional parameter too.
So you can instantiate Tube w/ that!

#7   Obstacle(PApplet pa, float _obHeight, float _obWidth) {

#14  tubo = new Tube(pa, 20, 5);

FAQ: Why I can't create an instance of a library from my own classes?

oh, thanks a lot!

btw
instead of
Why I can't create an instance of a library from my own classes?
Its
Why can't I create an instance of a library from my own classes?

Greetings, Chrisir