On Sun, Jan 22, 2012 at 23:52, Michaël ELBAZ <[email protected]> wrote:
> Hello,
>
> How can we modify this script to be able to move the yellow dot with the
> keys of a keyboard?
>
> # -*- coding: cp1252 -*-
>
> full_screen = True
> window_size = (1024, 768)
>
> import sys, random, pygame, os, platform
> from pygame.locals import *
> from math import *
>
> delta=2
> delta_step=1
>
> circles = ((0, delta),)
>
> circle_scale = 0.3
> circle_radius = 8
> n_grid = 3
> grid_spacing = 0.2
> grid_length = 0.05
> grid_width = 2
> rotation_speed = pi/2
> grid_color = (100, 100, 255)
> fix_radius = 8
> bg_color = (0, 0, 0)
> circle_color = (255, 255, 0)
> disapp_frames = 1
>
> window_center = (window_size[0]/2.0, window_size[1]/2.0)
> window_scale = min(window_size)/2.0
> def coord(real):
> """takes real coordinates, returns pixel coordinates"""
> return (int(round(real[0]*window_scale + window_center[0])),\
> int(round(-real[1]*window_scale + window_center[1])))
> g_cos, g_sin = 1, 0
> def set_rotation(angle):
> """sets up rotation"""
> global g_cos, g_sin
> g_cos, g_sin = cos(angle), sin(angle)
> def rotate(point):
> """rotates a 3D point about the Z-axis by given angle set by
> set_rotation()"""
> return (g_cos*point[0] + g_sin*point[1], -g_sin*point[0] +
> g_cos*point[1])
>
> # graphics initializations
> frames, show = 0, True
> try:
> pygame.init()
> if full_screen:
> surf = pygame.display.set_mode(window_size, HWSURFACE | FULLSCREEN
> | DOUBLEBUF)
> else:
> surf = pygame.display.set_mode(window_size)
>
> t0 = pygame.time.get_ticks()
> while True:
>
>
> for event in pygame.event.get():
> if event.type == KEYDOWN:
> if event.key == K_ESCAPE:
> raise Exception()
> elif event.type == MOUSEBUTTONDOWN: frames, show = 0, False
> elif event.type == MOUSEBUTTONUP: frames, show = 0, True
>
>
>
> for circ in circles:
> c = (circle_scale*circ[0], circle_scale*circ[1])
> if show:
> col = (150, 150, 0)
> pygame.draw.circle(surf, col, coord(c), circle_radius, 0)
> else:
> step = 150/disapp_frames
> lev = max(0, 150 - frames*step)
> col = (lev, lev, 0)
> if lev > 0:
> pygame.draw.circle(surf, col, coord(c), circle_radius,
> 0)
>
> for event in pygame.event.get():
>
> if event.key == K_LEFT:
> delta -= delta_step
> if event.key == K_RIGHT:
> delta += delta_step
>
> if show:
> col = (150, 150, 0)
> pygame.draw.circle(surf, col, coord(c),
> circle_radius, 0)
> else:
> step = 150/disapp_frames
> lev = max(0, 150 - frames*step)
> col = (lev, lev, 0)
> if lev > 0:
> pygame.draw.circle(surf, col, coord(c),
> circle_radius, 0)
>
>
> pygame.draw.circle(surf, grid_color, coord((0, 0)), fix_radius)
> pygame.display.flip()
> frames += 1
>
> finally: pygame.quit()
>
> Thank you very much !
>
> --
> M.E.
>
Hi Michaël,
I quickly edited your code, here is a working version below (which still
needs some clean up).
In short:
1) Only loop once in pygame.event.get()
2) Always check event.type == KEYDOWN before accessing event.key
3) Call surf.fill() in each iteration
###########################################
# -*- coding: cp1252 -*-
full_screen = False
window_size = (1024, 768)
import sys, random, pygame, os, platform
from pygame.locals import *
from math import *
delta=3
delta_step=0.1
circles = ((0, delta),)
circle_scale = 0.3
circle_radius = 8
n_grid = 3
grid_spacing = 0.2
grid_length = 0.05
grid_width = 2
rotation_speed = pi/2
grid_color = (100, 100, 255)
fix_radius = 8
bg_color = (0, 0, 0)
circle_color = (255, 255, 0)
disapp_frames = 1
window_center = (window_size[0]/2.0, window_size[1]/2.0)
window_scale = min(window_size)/2.0
def coord(real):
"""takes real coordinates, returns pixel coordinates"""
return (int(round(real[0]*window_scale + window_center[0])),\
int(round(-real[1]*window_scale + window_center[1])))
g_cos, g_sin = 1, 0
def set_rotation(angle):
"""sets up rotation"""
global g_cos, g_sin
g_cos, g_sin = cos(angle), sin(angle)
def rotate(point):
"""rotates a 3D point about the Z-axis by given angle set by
set_rotation()"""
return (g_cos*point[0] + g_sin*point[1], -g_sin*point[0] +
g_cos*point[1])
# graphics initializations
frames, show = 0, True
try:
pygame.init()
if full_screen:
surf = pygame.display.set_mode(window_size, HWSURFACE | FULLSCREEN
| DOUBLEBUF)
else:
surf = pygame.display.set_mode(window_size)
t0 = pygame.time.get_ticks()
while True:
surf.fill((0, 0, 0))
circles = ((delta, 0),)
for circ in circles:
c = coord((circle_scale*circ[0], circle_scale*circ[1]))
if show:
col = (150, 150, 0)
pygame.draw.circle(surf, col, c, circle_radius, 0)
else:
step = 150/disapp_frames
lev = max(0, 150 - frames*step)
col = (lev, lev, 0)
if lev > 0:
pygame.draw.circle(surf, col, c, circle_radius, 0)
for event in pygame.event.get():
if event.type == KEYDOWN and event.key == K_ESCAPE:
raise Exception()
elif event.type == MOUSEBUTTONDOWN: frames, show = 0, False
elif event.type == MOUSEBUTTONUP: frames, show = 0, True
if event.type == KEYDOWN and event.key == K_LEFT:
delta -= delta_step
if event.type == KEYDOWN and event.key == K_RIGHT:
delta += delta_step
if show:
col = (150, 150, 0)
pygame.draw.circle(surf, col, c, circle_radius, 0)
else:
step = 150/disapp_frames
lev = max(0, 150 - frames*step)
col = (lev, lev, 0)
if lev > 0:
pygame.draw.circle(surf, col, c, circle_radius,
0)
# blue circle
pygame.draw.circle(surf, grid_color, coord((0, 0)), fix_radius)
pygame.display.flip()
frames += 1
finally: pygame.quit()
###########################################
Best,
F
----
Franck Dernoncourt
[email protected]
http://franck-dernoncourt.com
