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Teil_020_4d.py
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Teil_020_4d.py
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import numpy as np
from math import cos, sin
import pygame as pg
WINDOW = [800,600]
TRANSFORM = [400, 300]
SKALIERUNG = 120
würfel = np.array([[-1,-1,-1,-1], [1,-1,-1,-1], [1,1,-1,-1], [-1,1,-1,-1],
[-1,-1,1,-1], [1,-1,1,-1], [1,1,1,-1], [-1,1,1,-1],
[-1,-1,-1,1], [1,-1,-1,1], [1,1,-1,1], [-1,1,-1,1],
[-1,-1,1,1], [1,-1,1,1], [1,1,1,1], [-1,1,1,1]])
def kanten_ermitteln(objekt):
kanten=[]
for i in range(len(objekt)-1):
for j in range(i+1,len(objekt)):
abst = round(np.linalg.norm(objekt[i]-objekt[j]),2)
if abst != 2.0: continue
kanten.append((i,j))
return kanten
def drehen4D(objekt, winkelwerte):
wx, wy, wz, ww = np.radians(winkelwerte)
if wx:
rotMatrix = np.array([[1,0,0,0],
[0, cos(wx), -sin(wx),0],
[0, sin(wx), cos(wx),0],
[0, 0, 0, 1]])
objekt = objekt @ rotMatrix
if wy:
rotMatrix = np.array([[cos(wy), 0, sin(wy),0],
[0, 1, 0,0],
[-sin(wy), 0, cos(wy),0],
[0, 0, 0, 1]])
objekt = objekt @ rotMatrix
if wz:
rotMatrix = np.array([[cos(wz), -sin(wz), 0, 0],
[sin(wz), cos(wz), 0, 0],
[0, 0, 1, 0],
[0, 0, 0, 1]])
objekt = objekt @ rotMatrix
if ww:
rotMatrix = np.array([[1,0,0,0],
[0, cos(ww), 0, -sin(ww)],
[0,0,1,0],
[0, sin(ww), 0, cos(ww)]])
objekt = objekt @ rotMatrix
return objekt
pg.init()
screen = pg.display.set_mode(WINDOW)
weitermachen = True
clock = pg.time.Clock()
wx = wy = wz = ww = 0
kanten = kanten_ermitteln(würfel)
while weitermachen:
clock.tick(80)
screen.fill((0,0,0))
for ereignis in pg.event.get():
if ereignis.type == pg.QUIT:
weitermachen = False
if ereignis.type == pg.KEYDOWN:
if ereignis.key == pg.K_x:
wx += 0.1
if ereignis.key == pg.K_y:
wy += 0.1
if ereignis.key == pg.K_z:
wz += 0.1
if ereignis.key == pg.K_w:
ww += 0.1
#hier zeichnen wir den Würfel
würfel = drehen4D(würfel,[wx, wy, wz, ww])
projektion2D = []
for punkt in würfel:
w1 = 4 / (4- punkt[3])
persp_projektion = np.array([[w1,0,0,0],
[0,w1,0,0],
[0,0,w1,0],
[0,0,0,0]])
pos = punkt @ persp_projektion
z1 = 4 / (4- punkt[2])
persp_projektion = np.array([[z1,0,0,0],
[0,z1,0,0],
[0,0,0,0],
[0,0,0,0]])
pos = pos @ persp_projektion
pos = pos[:2]
projektion2D.append(pos * SKALIERUNG + TRANSFORM)
for i1,i2 in kanten:
punkt1 = projektion2D[i1]
punkt2 = projektion2D[i2]
pg.draw.line(screen,(255,255,255), punkt1, punkt2, 1)
for pos in projektion2D:
pg.draw.circle(screen, (255,0,0), pos,5)
pg.display.flip()
pg.quit()