This page is out of date

You've reached a page on the Ren'Py wiki. Due to massive spam, the wiki hasn't been updated in over 5 years, and much of the information here is very out of date. We've kept it because some of it is of historic interest, but all the information relevant to modern versions of Ren'Py has been moved elsewhere.

Some places to look are:

Please do not create new links to this page.


Shake Effect

You can already use the default vpunch and hpunch transitions to shake the screen. But what about a shake that goes in every directions randomly, Phoenix Wright style?

init:

    python:
    
        import math

        class Shaker(object):
        
            anchors = {
                'top' : 0.0,
                'center' : 0.5,
                'bottom' : 1.0,
                'left' : 0.0,
                'right' : 1.0,
                }
        
            def __init__(self, start, child, dist):
                if start is None:
                    start = child.get_placement()
                #
                self.start = [ self.anchors.get(i, i) for i in start ]  # central position
                self.dist = dist    # maximum distance, in pixels, from the starting point
                self.child = child
                
            def __call__(self, t, sizes):
                # Float to integer... turns floating point numbers to
                # integers.                
                def fti(x, r):
                    if x is None:
                        x = 0
                    if isinstance(x, float):
                        return int(x * r)
                    else:
                        return x

                xpos, ypos, xanchor, yanchor = [ fti(a, b) for a, b in zip(self.start, sizes) ]

                xpos = xpos - xanchor
                ypos = ypos - yanchor
                
                nx = xpos + (1.0-t) * self.dist * (renpy.random.random()*2-1)
                ny = ypos + (1.0-t) * self.dist * (renpy.random.random()*2-1)

                return (int(nx), int(ny), 0, 0)
        
        def _Shake(start, time, child=None, dist=100.0, **properties):

            move = Shaker(start, child, dist=dist)
        
            return renpy.display.layout.Motion(move,
                          time,
                          child,
                          add_sizes=True,
                          **properties)

        Shake = renpy.curry(_Shake)
    #

#

You can now use it inline or create a few transitions :

init:
    $ sshake = Shake((0, 0, 0, 0), 1.0, dist=15)

Syntax : Shake(position, duration, maximum distance) with 'position' being a tuple of 4 values : x-position, y-position, xanchor, yanchor.

Examples

show phoenix think with dissolve
ph "I think this game lacks a little something... Right! Some..."
ph "Objection!" with sshake    # shaking the whole screen with the previously defined 'sshake'
ph "Eheh... Uh? What the?! It's reverberating!"
show phoenix at Shake((0.5, 1.0, 0.5, 1.0), 1.0, dist=5)    
with None
# shaking the sprite by placing it at the center (where it already was)
ph "Ng!..."
show phoenix at center, Shake(None, 1.0, dist=5)
with None
# exactly the same thing but it shows how you can first give a predefined position and, 
# giving None as a position for Shake, let it take 'center' as the shaking position.
ph "AAgh! Stop it already!"
ph "...... Is it over?"
with Shake((0, 0, 0, 0), 3.0, dist=30)
# some serious shaking of the screen for 3 seconds
# try not to abuse high values of 'dist' since it can make things hard on the eyes