Processing Forum

Class instance error.

[1 Reply]
- 20-May-2013 04:44 PM
- Forum: Library and Tool Development
Hello to all.
When you start a library the Eclipse Library template provide a class. let's call it Class1.

If I crate two more classes (classA and classB) and I want to instantiate ClassB into class1 works ok. But If I need to instantiate ClassB into ClassA I got an error: ClassB cannot be resolved to a type.

code example:
1. public class ClassA{
2. PApplet parent;
3. public ClassA(PApplet myParent)
4. {
5. parent = myParent;
6. }
7. public void Foo()
8. {
9. ClassB cb = new ClassB(); //error -> cannot be resolved to a type.
10. }
11. }
2. public class ClassB
3. {
4. public ClassB() //empty constructor
5. {
7. }
9. public int[] RandomNumbers(int cant)
10. {
11. return random numbers
12. }
13. }
thanks in advance
regards

C.

Insert Image in Javadoc?

[6 Replies]
- 08-Sep-2012 04:49 AM
- Forum: Library and Tool Development
hello to all!

Does anyone knows how to insert images in the javadoc?

thanks in advance

regards

c,

how to convert a specific class to generic object in Java.

[6 Replies]
- 27-Aug-2012 03:08 PM
- Forum: General Discussion
Dear all.
working in my library:

In Java I want to manage and play with objects created in processing. for example unsort an array of objects. since I don't know which type of object can be created in processing.

So how can I convert an specific class (later and object) in processing to the generic object in Java?

thanks in advance

kind regards

Carlos.

System.arraycopy() any clue?

[4 Replies]
- 18-Aug-2012 08:24 AM
- Forum: Programming Questions
hello to all
I'm passing an array(char[][]) into a method. I'm using the arraycopy() to make a copy of the array and avoid modify the array outside of the class. but I can't get it.

please any help will be amazing.

thanks in advance

C.
2. public char[][] GenrMutation(char[][] pop, float ChroPercent)
3. {
4. SelectChromosomes(pop);
5. int chroCant = (int)(pop[0].length * ChroPercent);
6. if(chroCant == 0){ chroCant = 1;}
8. char[][] mutatedPop = new char[pop.length][];
9. System.arraycopy(pop, 0, mutatedPop, 0, pop.length);
11. char rndChar; //random Character to replace
12. int pointer; //random pointer, for the index
14. for(int i = 0; i < cant; ++i) //the loop for the pop
15. {
16. for(int j = 0; j < chroCant; ++j) //the loop for the chro
17. {
18. rndChar = RandomChar();
19. pointer = new Random().nextInt(mutatedPop[i].length);
20. mutatedPop[arrIndex[i]][pointer] = rndChar;
21. }
22. }
24. return mutatedPop;
25. }
and in the main, this is how I'm calling the function.

also I tryed using the clone() function. but it did not work.
1. import processing.core.*;
  
  public class Main {
  
  static PApplet mirrorApplet;
  
  public static void main(String[] args)
  
  {
  
  char[][] myCharPop;
  
  @SuppressWarnings("unused")
  
  char[][] mutatedPop;
  
  MGenrPopulation charPop = new MGenrPopulation();
  
  myCharPop = charPop.CharPopulation(5, 10);
  
  MMutation mutation = new MMutation(mirrorApplet, (float)0.4);
  
  mutatedPop = mutation.GenrMutation(myCharPop, (float)0.3);
  
  }
  
  }

best practice to develop my library?

[12 Replies]
- 13-Aug-2012 01:42 PM
- Forum: Library and Tool Development
hello to all,
I'm working in a processing library in eclipse, and I would like to know the best practice to debug that library into eclipse. I have been trying to create a main class in eclipse and call the other class from there. but is not so practice. because you have to delete the class in order to compile the library.

any tip?

thanks in advance

regards

C,

accessing to a public method in library from processing

[1 Reply]
- 13-Aug-2012 01:34 PM
- Forum: Library and Tool Development
hello to all.

I'm working in a class library for processing, but when I try to access to a public method in the library from processing

I got the error: NullPointerException .

what I'm doing wrong.?

any help will be greate.!

thanks in advance.

this is what I have in Eclipse:
Copy code
2. package Laga;
3. import processing.core.*;
5. public class Crosscountry
6. {
7. PApplet myparent;
8. public char[][] SonPop;
9. public Crosscountry(PApplet parent){
10. myparent = parent;
11. }
13. public void SingleSongCountry(){
14. SonPop = new char[10][10];
16. for(int j = 0; j < 10; ++j){
17. for(int i = 10; ++i){
18. SonPop[j][i] = "s";
19. }
20. }
21. }
22. }
And this is the code in processing:
Copy code
2. import Laga.*; //import the library...
3. Crosscountry crossPop;
4. char[][] inhPop;
6. void setup()
7. {
8. size(500, 800);
9. smooth();
10. crossPop = new Crosscountry(this);
11. crossPop.SingleSongCountry(); //the error happend here.
12. inhPop = crossPop.SonPop;
13. }
Regards
C.

Embed processing sketch in Microsoft PowerPoint?

[3 Replies]
- 10-Aug-2012 03:26 AM
- Forum: General Discussion
Does anyone know if is possible
embed a processing sketch in microsoft power point?

any idea?

thanks in advance

regards

c,

Procssing applet in OpenOffice Impress

[0 Replies]
- 20-Nov-2011 05:29 PM
- Forum: General Discussion
Hello Everyone,

Does anyone knows if is possible insert processing applet into a OO impress presentation.

thanks in advance

c,

curve analysis

[3 Replies]
- 29-Sep-2010 08:40 AM
- Forum: Programming Questions
Hello Everyone,
I'm carlos and I'm really new in processing.

I have to deal with curves and interaction, the thing that I have to do is like this.

1 pick a point on the canvas

2 find the point on the curve closest to the previous point.

3 draw a line between two points.

there is a function, method class or something that I can implement to find a point on a curve?

thanks in advance

C,

Activity Trend