pygame3D游戏代码

很抱歉，pygame并不是专门用于3D游戏开发的库，它更擅长于2D游戏的开发。如果您想要开发3D游戏，建议选择专门的3D游戏引擎，例如Unity、Unreal Engine等。

不过，如果您想要使用pygame开发2.5D游戏，可以考虑使用一些3D效果的技巧来实现，例如透视投影、纹理映射等。

下面是一个简单的例子，展示如何使用pygame实现3D效果：

import pygame
import math

pygame.init()

# 设置屏幕大小
screen_width = 640
screen_height = 480
screen = pygame.display.set_mode((screen_width, screen_height))

# 定义一个立方体的顶点坐标
vertices = [
    [-1, 1, -1],
    [1, 1, -1],
    [1, -1, -1],
    [-1, -1, -1],
    [-1, 1, 1],
    [1, 1, 1],
    [1, -1, 1],
    [-1, -1, 1]
]

# 定义一个立方体的面
faces = [
    [0, 1, 2, 3],
    [0, 4, 5, 1],
    [1, 5, 6, 2],
    [2, 6, 7, 3],
    [3, 7, 4, 0],
    [4, 7, 6, 5]
]

# 定义一个立方体的颜色
colors = [
    (255, 0, 0),
    (255, 128, 0),
    (255, 255, 0),
    (0, 255, 0),
    (0, 0, 255),
    (128, 0, 255)
]

# 定义相机的位置和朝向
camera_pos = [0, 0, -5]
camera_dir = [0, 0, 1]

# 定义光源的位置
light_pos = [0, -10, -10]

# 定义投影矩阵
fov = 90
aspect = screen_width / screen_height
near = 0.1
far = 100
proj_matrix = [
    [1 / math.tan(fov / 2), 0, 0, 0],
    [0, aspect / math.tan(fov / 2), 0, 0],
    [0, 0, -(far + near) / (far - near), -2 * far * near / (far - near)],
    [0, 0, -1, 0]
]

# 定义旋转矩阵
def rotation_matrix(angle, axis):
    c = math.cos(angle)
    s = math.sin(angle)
    if axis == 'x':
        return [
            [1, 0, 0],
            [0, c, -s],
            [0, s, c]
        ]
    elif axis == 'y':
        return [
            [c, 0, s],
            [0, 1, 0],
            [-s, 0, c]
        ]
    elif axis == 'z':
        return [
            [c, -s, 0],
            [s, c, 0],
            [0, 0, 1]
        ]

# 主循环
clock = pygame.time.Clock()
while True:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()

    # 清空屏幕
    screen.fill((0, 0, 0))

    # 计算相机的朝向向量
    camera_target = [camera_pos[i] + camera_dir[i] for i in range(3)]
    camera_z = [camera_pos[i] - camera_target[i] for i in range(3)]
    camera_z = [i / math.sqrt(camera_z[0]**2 + camera_z[1]**2 + camera_z[2]**2) for i in camera_z]

    # 计算相机的右侧向量和上方向量
    camera_x = [camera_dir[1] * camera_z[2] - camera_dir[2] * camera_z[1],
                camera_dir[2] * camera_z[0] - camera_dir[0] * camera_z[2],
                camera_dir[0] * camera_z[1] - camera_dir[1] * camera_z[0]]
    camera_x = [i / math.sqrt(camera_x[0]**2 + camera_x[1]**2 + camera_x[2]**2) for i in camera_x]
    camera_y = [camera_z[1] * camera_x[2] - camera_z[2] * camera_x[1],
                camera_z[2] * camera_x[0] - camera_z[0] * camera_x[2],
                camera_z[0] * camera_x[1] - camera_z[1] * camera_x[0]]

    # 计算视图矩阵
    view_matrix = [
        [camera_x[0], camera_y[0], camera_z[0], 0],
        [camera_x[1], camera_y[1], camera_z[1], 0],
        [camera_x[2], camera_y[2], camera_z[2], 0],
        [-sum([camera_pos[i] * view_matrix[i][j] for i in range(3)]) for j in range(4)]
    ]

    # 计算模型矩阵和变换矩阵
    model_matrix = rotation_matrix(pygame.time.get_ticks() / 1000, 'y')
    transform_matrix = [[model_matrix[j][i] for j in range(3)] + [0] for i in range(4)]

    # 绘制立方体的面
    for i, face in enumerate(faces):
        # 计算面的法向量
        normal = [0, 0, 0]
        for j in range(3):
            normal[0] += (vertices[face[j]][1] - vertices[face[(j + 1) % 4]][1]) * (vertices[face[j]][2] + vertices[face[(j + 1) % 4]][2])
            normal[1] += (vertices[face[j]][2] - vertices[face[(j + 1) % 4]][2]) * (vertices[face[j]][0] + vertices[face[(j + 1) % 4]][0])
            normal[2] += (vertices[face[j]][0] - vertices[face[(j + 1) % 4]][0]) * (vertices[face[j]][1] + vertices[face[(j + 1) % 4]][1])
        normal = [i / math.sqrt(normal[0]**2 + normal[1]**2 + normal[2]**2) for i in normal]

        # 计算面的中心点
        center = [sum([vertices[face[j]][i] for j in range(4)]) / 4 for i in range(3)]

        # 计算面的颜色
        color = [colors[i] for i in range(len(colors)) if i == i % len(faces)][i]

        # 计算光照强度
        light_dir = [light_pos[i] - center[i] for i in range(3)]
        light_dir = [i / math.sqrt(light_dir[0]**2 + light_dir[1]**2 + light_dir[2]**2) for i in light_dir]
        light_intensity = max(0, sum([normal[i] * light_dir[i] for i in range(3)]))

        # 计算面的投影坐标
        vertices_projected = []
        for j in range(4):
            vertices_transformed = [vertices[face[j]][i] * transform_matrix[i][0] + vertices[face[j]][i] * transform_matrix[i][1] + vertices[face[j]][i] * transform_matrix[i][2] + transform_matrix[i][3] for i in range(3)]
            vertices_projected.append([vertices_transformed[i] * proj_matrix[i][i] / vertices_transformed[2] + screen_width / 2 for i in range(2)])

        # 绘制面
        pygame.draw.polygon(screen, [color[i] * light_intensity for i in range(3)], vertices_projected)

    # 更新屏幕
    pygame.display.flip()

    # 控制帧率
    clock.tick(60)

这个例子展示了如何通过计算投影矩阵、模型矩阵、视图矩阵和变换矩阵来实现简单的3D效果。具体来说，它通过计算立方体的面的法向量、中心点、颜色和光照强度，以及通过投影矩阵将立方体的顶点坐标转换为屏幕坐标，来实现3D效果。