Radial animation

eduairet

Hi everyone, I’m looking for a way to create a radial animation, I’m trying it with the following code:

thickness = 10
isOval = True
limit = height()

isBlack = True
jumpinValue = 0

while jumpinValue < limit*1.3:

    fill(None)
    strokeWidth(thickness)
    
    if isBlack is True:
        stroke(0)
    else:
        stroke(1)
        
    if isOval is True:
        oval((width()/2)-(jumpinValue/2), (height()/2)-(jumpinValue/2), jumpinValue, jumpinValue)
    else:
        rect((width()/2)-(jumpinValue/2), (height()/2)-(jumpinValue/2), jumpinValue, jumpinValue)
        
    newPage(1000, 1000)
    
    isBlack = not isBlack
    jumpinValue += thickness

What I want to make is to keep the circles while new circles appear and then make the radial animation.

Thanks for your help.

gferreira

hello @eduairet,

What I want to make is to keep the circles while new circles appear and then make the radial animation.

you could draw the shape using a function which takes the number of steps as a parameter; at every new page, you increase the number.

have a look at this example. good luck!

eduairet

@gferreira it worked, thanks a lot, I want to know if there’s a way to control the speed of the animation?.

def drawShape(step):
   
    jumpinValue = 0
    thickness = 3
    
    fill(None)
    strokeWidth(thickness)
    stroke(0)
    fill(None)
    
    translate(0, 0)

    for i in range(step):
        oval((width()/2) - (jumpinValue*3), (height()/2)-(jumpinValue*3), 10+(jumpinValue*4), 10+(jumpinValue*4))
        translate(thickness, thickness)
        jumpinValue += thickness

# create pages/frames
for i in range(150):
    newPage(1000, 1000)
    fill(1)
    rect(0, 0, 1000, 1000)
    drawShape(i+1)
    

# save animation
saveImage('~/Desktop/radial.mp4')

gferreira

hello @eduairet,

I want to know if there’s a way to control the speed of the animation?

yes, you can set the duration of each frame in seconds – see frameDuration

eduairet

@gferreira wow, this is huge!!! thank you again