pygame如何让屏幕抖动？

Question

I am making a game, and when I fire a bullet I want to make the screen shake. I can't find anything on Google so I thought I'd ask here. Just maybe some examples, thanks. I don't have any code yet, so I wont display it here.

I'm thinking something like this:

if space bar clicked:
     screenshake()

Answer 1

First let's think about a cool shaking function through time, like a damped sine wave .

It has the mathematical form:

f(t) = A*e^(-k*t)*sin(w*t + p)

where A is the amplitude, -k the decaying factor, w the angular frequency and p the phase angle.In Pygame, your whole screen is a surface. Assuming that you called your main surface screen , and that you sampled a few (x, y) points from f(t) (you can use different A, w, and p values for x and y), you can shake your screen as follow when you update the frame:

tmp_screen = screen.copy
screen.fill((0,0,0))  # erase current screen
screen.blit(tmp_screen,(x_shift,y_shift)) # reprint previous screen but shifted