16/01/15 18:39
lorenzoscarrone
#importo i moduli import pygame import math pygame.init() #definizioni delle variabili di grafica per l'accelerazione hardware screen = pygame.display.set_mode((600,480), pygame.DOUBLEBUF | pygame.HWSURFACE) pygame.display.set_caption("Prova per disegnare albero frattale") surf = pygame.display.get_surface() alfa_value = (45/180)*math.pi distance = 20 white = (255,255,255) vertex = [(300,0),(300,distance)] def find_vertex( pa ,alfa ,l ): global vertex xb = pa[0]-math.sqrt( (l*l)/1+(math.tan(alfa)*math.tan(alfa)) ) yb = math.tan(alfa)*(xb-pa[0])+pa[1] return vertex.append((xb,y(yb))) def v_angle( ang ): global alfa_value return ang + alfa_value def v_distance ( l ): return (l/4) def draw_lines( a ,b ): pygame.draw.line(surf, white , a, b, 1) def y( c_y ): return c_y pygame.draw.line(surf, white, vertex[0], vertex[1], 1) count = 1 alfa = alfa_value lato = distance while True: find_vertex( vertex[count], alfa, lato ) draw_lines( vertex[count], vertex[count+1] ) alfa = v_angle( alfa ) lato = v_distance ( lato ) count += 1 print(count) pygame.time.delay(1000) pygame.display.flip()
error code:
python3 frattali.py 2 Traceback (most recent call last): File "frattali.py", line 45, in <module> draw_lines( vertex[count], vertex[count+1] ) File "frattali.py", line 31, in draw_lines pygame.draw.line(surf, white , a, b, 1) TypeError: Invalid end position argument
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