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Processing
E arte digitale
Daniele Barattieri di San Pietro
21/10/2016 Daniele Barattieri
2
Bio - Daniele
● Studente di Ing Informatica
● Sedicente Digital Artist
● Programmatore
● InfoSec wannabe
● Presidente µHack
● Lavoro
21/10/2016 Daniele Barattieri
3
Download
● Sito ufficiale: https://processing.org/
● Scompattate e avviate...
21/10/2016 Daniele Barattieri
4
Dove eravamo rimasti?
21/10/2016 Daniele Barattieri
5
Pronti? :D
21/10/2016 Daniele Barattieri
6
Andiamo!
21/10/2016 Daniele Barattieri
7
Oggetti e Classi
● Cos’è? Perché? Com’è?!
– Variabili e funzioni concettualmente legate
– La programmazione ad oggetti torna
particolarmente comoda con Processing
– Stessa struttura, sintassi logica di gestione
classi di Java
● Classe: atto
● Oggetti: potenza
Good Guy
Processing!
21/10/2016 Daniele Barattieri
8
...concettualmente
21/10/2016 Daniele Barattieri
9
Nuova tab+
● Apriamo una
nuova pagina dal
menu
● Diamo un nome
21/10/2016 Daniele Barattieri
10
Vediamo un po'...
21/10/2016 Daniele Barattieri
11
E come si usano?
● La prima riga crea
una variabile di
tipo Faccina
● Dopo la
riempiamo di un
oggetto Faccina
● E in fine la
chiamiamo il
metodo
“disegnami”
21/10/2016 Daniele Barattieri
12
Risultati?
21/10/2016 Daniele Barattieri
13
Si ma dove sta la parte
interessante?
● La Programmazione
orientata agli
oggetti (O.O.P.) è
estremamente
comoda nel gestire
vari operatori sul
disegno
● Esistono classi
molto utili già
pronte!
21/10/2016 Daniele Barattieri
14
Take one, make two!
● E per fare
un’altra faccina?
● Immaginiamo
però di voler
inserire 100
faccine…
21/10/2016 Daniele Barattieri
15
UH-ARRAY!
● Servono da “sacchetti” per tanti
oggetti, messi in “linea”
21/10/2016 Daniele Barattieri
16
...e ancora, come li uso?? =.=
21/10/2016 Daniele Barattieri
17
Gli array sono delicati! Listiamoli!
● L’utilizzo degli
array è molto
performante ma
difficile e delicato
● Esistono altri
sistemi per
ottenere simili
effetti…
21/10/2016 Daniele Barattieri
18
ArrayList – alcuni metodi
● Get(i)
● Add(i)
● IndexOf(Object)
● Remove(i)
● Clear()
● Size()
● Set(i, object)
21/10/2016 Daniele Barattieri
19
PROGETTO
...volevamo ottenere un effetto simile
a questo giusto?
21/10/2016 Daniele Barattieri
20
PRESTATEMI ORECCHIO!
21/10/2016 Daniele Barattieri
21
Immagine… puoi!
● Classe “PImage”
messa a
disposizione da
Processing per
gestire le
immagini, dalla
dimensione sino
ai singoli pixel!
● Si carica con
“loadImage(path)”
● Si disegna con
“image(oggetto_img)”
21/10/2016 Daniele Barattieri
22
Image
● I file devono
stare nella
cartella “data”
● Se si vogliono
leggere i pixel,
usare prima
“loadPixel()”
● Attenzione ai
formati!
21/10/2016 Daniele Barattieri
23
...e alle dimensioni!
● Se modifichiamo
dei pixel,
ricordiamoci di
“updatePixel()”!
21/10/2016 Daniele Barattieri
24
D-D-D
● Basta aggiungere “P3D” come terzo
argomento della funzione size()
● Attenzione che non basta aggiungere una
terza coordinata alle fuzioni!
● Fare largo usdo di “translate()”!!!
21/10/2016 Daniele Barattieri
25
Librerie
https://processing.org/reference/librar
ies/
21/10/2016 Daniele Barattieri
26
Domande?
21/10/2016 Daniele Barattieri
27
Grazie
● Contatti
– Mail: danielebarattieri@gmail.com
– µHack: info@muhack.org

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