校正鱼眼效果 2.5D

问题描述

我正在制作像德军总部 3D 那样的 2.5d 光线投射引擎。我需要帮助纠正鱼眼效果。我了解正在发生的事情并且已经做了我自己的数学来尝试摆脱它，但它并没有完全摆脱影响：“n *= math.cos(fish_eye/(180/3.1415))” n 是欧几里得距离和fish_eye从45到0到45（90度FOV）“/（180/3.1415）”是从度数转换为弧度。当您离得远一些时，鱼眼看起来并不坏，但是当您靠近时，您几乎看不出它应该是 3D 的。

这是我写的代码（请不要告诉我它有多糟糕，我绝对没有做任何事情来使它更快或更漂亮）：

import pygame
from pygame.locals import *
import time
import collections
import numpy as np
import math

pygame.init()
display_width = 500
display_height = 500
px = 3
py = 1
pd = 0
window = pygame.display.set_mode((display_width,display_height),pygame.RESIZABLE)
pygame.display.set_caption("Window")
black = (0,0)
white = (255,255,255)
green = (0,0)
red = (255,0)
font = pygame.font.SysFont("monospace",40)



map1 = np.matrix([[1,1,1],[1,1]])


def game_setup():
    global black,white,green,red
    window.fill(white)
    mapdisp(map1)
    pygame.display.update()
    gameLoop()


def mapdisp(mapVar):
    for y in range(0,50):
        for x in range(0,50):
            if mapVar[y,x]:
                pygame.draw.rect(window,red,pygame.Rect(x,y,1))


def raycast(movement,correct):
    global pd,px,py,map1
    stepy = math.sin(pd/(180/3.14159))
    stepx = math.cos(pd/(180/3.14159))
    print("Look angle: ",pd)
    print("Step on the X: ",stepx)
    print("Step on the Y: ",stepy)
    window.fill(white)
    mapdisp(map1)
    if movement != "none":
        if movement == "back":
            pstepx = -1*(stepx/4)
            pstepy = -1*(stepy/4)
        else:
            pstepx = stepx/4
            pstepy = stepy/4
        if map1[int(py),int(px + pstepx)]:
            pstepx = 0
        if map1[int(py + pstepy),int(px)]:
            pstepy = 0
        px += pstepx
        py += pstepy
    for ray in range(-45,45):
        fish_eye = abs(ray)
        stepy = math.sin((pd + ray) / (180 / 3.14159))
        stepx = math.cos((pd + ray) / (180 / 3.14159))
        hit = False
        n = 0
        rx = px
        ry = py
        while not hit or n >= 100:
            rx += stepx
            ry += stepy
            if map1[int(ry),int(rx)]:
                hit = True
                if map1[int(ry),int(rx-stepx)]:
                    color = (100,100,100)
                else:
                    color = (50,50,50)
                if correct:
                    n = n*math.cos(fish_eye/(180/3.1415))
                pygame.draw.rect(window,color,pygame.Rect((ray + 45)*5,200 + 2*n,5,200 - 4*n))
            else:
                n += 1
                pygame.draw.rect(window,pygame.Rect(rx,ry,1))
    pygame.display.update()

def gameLoop():
    global pd
    play = True
    rotate = 0
    movement = "none"
    start_time = time.time()
    frames = 0
    correct = True
    while play:
        forward = False
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
            rotate = 0
            movement = "none"
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    print("left")
                    rotate = -1
                if event.key == pygame.K_RIGHT:
                    print("right")
                    rotate = 1
                if event.key == pygame.K_ESCAPE:
                    pygame.quit()
                    quit()
                if event.key == pygame.K_UP:
                    movement = "forward"
                elif event.key == pygame.K_DOWN:
                    movement = "back"
                if event.key == pygame.K_LSHIFT:
                    correct = True
                elif event.key == pygame.K_RSHIFT:
                    correct = False

        if rotate != 0 or movement != "none":
            pd += rotate
            if pd >= 360:
                pd -= 360
            elif pd < 0:
                pd += 360
            raycast(movement,correct)
        frames += 1
        if time.time()-start_time >= .1:
            text1 = font.render(str(frames*10),True,red)
            window.blit(text1,(300,1))
            pygame.display.update()
            frames = 0
            start_time = time.time()


game_setup()

time.sleep(10)

我看过很多溢出的帖子，但要么我看不懂，要么不起作用。

这是一张照片：

如果你愿意，你可以将上面的代码复制并粘贴到 pycharm 或其他代码运行器中。只需记住安装所有导入 (:

解决方法

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