使用透视摄像机解决不同长宽比的问题。下面是使用Python和Pygame模块创建透视相机的示例代码：

import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *

# 设置窗口尺寸和长宽比
width, height = 800, 600
aspect_ratio = width / height

# 初始化Pygame窗口和OpenGL绘图环境
pygame.init()
pygame.display.set_mode((width, height), DOUBLEBUF | OPENGL)
glMatrixMode(GL_PROJECTION)
gluPerspective(45, aspect_ratio, 0.1, 50.0)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()

# 设置相机位置和朝向
camera_pos = (0, 0, 5)
camera_target = (0, 0, 0)
camera_up_vector = (0, 1, 0)
gluLookAt(*camera_pos, *camera_target, *camera_up_vector)

# 绘制立方体
def draw_cube():
    glBegin(GL_QUADS)
    glColor3f(1, 0, 0)
    glVertex3f(-1, 1, -1)
    glVertex3f(1, 1, -1)
    glVertex3f(1, -1, -1)
    glVertex3f(-1, -1, -1)

    glColor3f(0, 1, 0)
    glVertex3f(-1, 1, 1)
    glVertex3f(1, 1, 1)
    glVertex3f(1, -1, 1)
    glVertex3f(-1, -1, 1)

    glColor3f(0, 0, 1)
    glVertex3f(-1, 1, -1)
    glVertex3f(-1, 1, 1)
    glVertex3f(-1, -1, 1)
    glVertex3f(-1, -1, -1)

    glColor3f(1, 1, 0)
    glVertex3f(1, 1