using PVector in Eclipse

proce55ing

in Integration and Hardware • 2 years ago

I am porting a project to Eclipse because I want to learn more an be more flexible with other available java libraries and debugging etc..

I understood that all processing graphics functions when used in other classes need to refer to the PApplet...what about other data types such as PVector? How do I access them from other classes in Eclipse?

I know my question might sound odd but I am learning...;-)

Replies(7)

PhiLho

Re: using PVector in Eclipse

2 years ago

As you wrote, PVector is a data type, it doesn't do any drawing, so, to my knowledge, it doesn't need a reference to a PApplet. If a library doesn't mention PApplet in the constructor (or a setter), it just doesn't need it.

proce55ing

Re: using PVector in Eclipse

2 years ago

I tried to add this line " import processing.core.PVector; " on my code but I get a long list of errors...sigh!

Can you advise maybe a friendly Java Forum where I could ask more help?

java.lang.Error: Unresolved compilation problems:

The constructor PVector(double, double, double) is undefined

Type mismatch: cannot convert from double to float

Cannot reduce the visibility of the inherited method from PApplet

The constructor MySystem(PVector, PApplet) refers to the missing type PVector

Cannot reduce the visibility of the inherited method from PApplet

The method simulate(float) in the type MySystem is not applicable for the arguments (double)

Cannot reduce the visibility of the inherited method from PApplet

The method addForce(float, float, float, int) is undefined for the type Main

PVector cannot be resolved to a type

Type mismatch: cannot convert from double to float

PhiLho

Re: using PVector in Eclipse

2 years ago

Wow, that's a lot...
For at least half of them: don't forget that Processing uses only floats, and that in Processing, 1.0 is a float, while it is a double in Java. So you have to call PVector(1.0f, 2.0f, 3.0f) for example.

proce55ing

Re: using PVector in Eclipse

2 years ago

well getting closer but still struggling with PVector..now I get only this error

Exception in thread "Animation Thread" java.lang.Error: Unresolved compilation problem:

The constructor MySystem(PVector, PApplet) refers to the missing type PVector

proce55ing

Re: using PVector in Eclipse

2 years ago

Plus...in Processing IDE If I declare a global variable then it accessible to all classes in my program. How can I do the same with eclipse?

PhiLho

Re: using PVector in Eclipse

2 years ago

Processing's global variables are actually fields of the PApplet you declare. They are accessible from all methods, and sub-classes of the class.

And PVector is in the same jar than PApplet, so if the compiler sees it and if you imported it correctly with the import statement, it shouldn't remain missing.

proce55ing

Re: using PVector in Eclipse

2 years ago

to be honest I am going into endless troubles...there is lot of kow how I am missing when it comes to pure java now...

I think I fixed with PVector...now troubles are with all other libraries I was using..like Opengl. I in the processing opengl library folder there are lots of jars - do I need to import them all in eclipse? Then which one I need to call and import in my source? In processing I just wrote import processing.opengl.* ...and the same with all other..

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