A circle gets bigger in Python!

jimmyvuw

A circle gets bigger in Python!

in Processing with Other Languages • 1 year ago

I'm not sure this section is for python or not. Right now, I'm doing the project use python language but based on processing (processing like a module I think). I don't know how to animate a circle getting bigger through time in Python, it seems the def draw() doesn't work as processing's void draw(). It always stop at the end of the loop and show all the circles it did draw (not like draw a circle and place a white background on it then draw again). Someone helps please. If you don't get what I mean, please ask me again (i guess I will try another way to explain, sorry my English)

Replies(9)

monkstone

Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

Are you using pyprocessing or are you processing.py? This is the right place for processing.py, for pyprocessing better here https://groups.google.com/forum/?fromgroups#!forum/pyprocessing-users. In processing.py the draw loop works very much like vanilla processing. If you want to clean the slate put a background at the beginning of the draw loop.

jimmyvuw

Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

Yes, I am using the processing.py. (Thanks god, I know it!) Here the short code I tried but didn't work

def setup():
size(200,200)
smooth()
stroke(0)
fill(0,0,0,10)
def draw():
background(255)
x = 0
while (x<200):
x = x + 10
ellipse(100,100,x,x)
else:
x = 0

monkstone

Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

def setup():
size(200,200)
smooth()
stroke(0)
fill(0,0,0,10)
# frameRate(2)
def draw():
x = frameCount % 200
background(255)
ellipse(100,100,x,x)

Does above code do what you want?

jimmyvuw

Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

wow... awesome! finally, after 3 hours... no joke you saved me ! thanks a lot

monkstone

Re: Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

I hope you understand the code.

jimmyvuw

Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

yes, I do.

Just one more question, sir:

I got this code which randomize the circle on only black areas on an image. However, I don't know to restrict it more in some areas. For example, I got a worldmap image here in black and white. the oceans are white and the continents are black. I would like to put some random circles on the black area only but restricted by some areas like europe or south east asia... etc how can I create more restricted area for the random circles?

Sorry for my bad bad English, hope you understand. Here is my code

def setup():
size(2000,1200_
smooth()
a = loadImage("worldmap1.png")
image(a,0,0)
filter(THRESHOLD,0.5)
ellipseMode(CENTER)
def draw():
fill(random(255),random(255),random(255))
noStroke()
x = random(0,2000)
y = random (0,1200)
if (get(x,y) == color(0)):
ellipse(x,y,5,5)

monkstone

Re: Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

I guess you are looking for a point in polygon solution http://en.wikipedia.org/wiki/Point_in_polygon , but you could make it simpler, if rectangle or even sphere would do as an approximation (you've got the landmass outline shape covered by the color mask, although that need not be only black colored countries?).

jimmyvuw

Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

Actually, I just can create a world map with one colour... that would be hard for me... oh well, sir could you please show me how create a class in pyprocessing? In processing, I can do this.. but it won't work in pyprocessing

class Circle{
float x,y,r;
color c;
Circle(){
x = random(width);
y = random(height);
r = random(10,20;
c = color(random(255,random(255),random(255));
}
void draw(){
pushStyle();
ellipseMode(CENTER);
fill(c);
stroke(0);
ellipse(x,y,r,r);
popStyle();
}
}
Circle[] circles;
...........

at the Circle[] circles i don't know how to put in pyprocessing though.... it's so confused since this two are slightly different

monkstone

Re: Re: A CIRCLE GETS BIGGER IN PYTHON!

1 year ago

The point about processing.py (and pyprocessing) is that you are using python, therefore you need to know python syntax (understand what Guido the benevolent dictator expects!!). This example should give you a start. Initializing Circle with width and height avoids need for global variable declare but I guess that might be more efficient. Also rather than use get in earlier examples you should take a look at loadPixels() etc and call the pixel array directly...

def setup():
size(100, 100)
circle = Circle(width, height)
circle.draw()
class Circle:
"""Circle class with default to initialize as a random size and color"""
def __init__(self, x, y, r = random(10, 20), c = color(random(255),random(255),random(255))):
self.x = random(x)
self.y = random(y)
self.r = r
self.c = c
def draw(self):
"""OO draw"""
fill(self.c)
ellipse(self.x, self.y, self.r, self.r)

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