stup.py

import pygame, sys, math

def rotate2d(pos,rad): x,y=pos; s,c = math.sin(rad),math.cos(rad); return x*c - y*s,y*c+x*c

class Cam:
        def __init__(self,pos=(0,0,0),rot=(0,0)):
                self.pos = list(pos)
                self.rot = list(rot)

        def events(self, event):
                if event.type == MOUSEMOTION:
                                x,y = event.rel; x/=200; y/=200
                                self.rot[0]+=y; self.rot[1]+=x
        def update(self,dt,key):
                s = dt*10
                if key[pygame.K_q]: self.pos[1]+=s
                if key[pygame.K_e]: self.pos[1]-=s
                if key[pygame.K_w]: self.pos[2]+=s
                if key[pygame.K_s]: self.pos[2]-=s
                if key[pygame.K_a]: self.pos[0]-=s
                if key[pygame.K_d]: self.pos[0]+=s

from pygame.locals import *

pygame.init()
w,h = 400,400; cx,cy = w//2,h//2
screen = pygame.display.set_mode((w,h))
clock = pygame.time.Clock()

verts = (-1,-1,-1),(1,-1,-1),(1,1,-1),(-1,1,-1),(-1,-1,1),(1,-1,1),(1,1,1),(-1,1,1)
edges = (0,1),(1,2),(2,3),(3,0),(4,5),(5,6),(6,7),(7,4),(0,4),(1,5),(2,6),(3,7)

cam = Cam((0,0,-5))

pygame.event.get(); pygame.mouse.get_rel()
pygame.mouse.set_visible(0); pygame.event.set_grab(1)

while True:
        dt = clock.tick()/1000
        for event in pygame.event.get():
                if event.type == QUIT:
                        pygame.quit()
                        sys.exit()
                cam.events(event)

        screen.fill((255, 255, 255))

        for edge in edges:
                points = []
                for x,y,z in (verts[edge[0]],verts[edge[1]]):
                        x-=cam.pos[0]
                        y-=cam.pos[1]
                        z-=cam.pos[2]

                        x,z = rotate2d((x,z),cam.rot[1])
                        y,z = rotate2d((y,z),cam.rot[0])

                        z+=5
                        f = 200/z
                        x,y = x*f,y*f

                        points += [(cx+int(x),cy+int(y))]
                pygame.draw.line(screen, (0,0,0),points[0],points[1],1)

        pygame.display.flip()

        key = pygame.key.get_pressed()
        cam.update(dt,key)