45度斜坡怎么撞？

Question

过去 3 天我一直在努力理解这一点，但是我阅读的每篇文章和观看的每一个 youtube 视频都未能理解这个概念。在发问之前，我已经尽力听取和阅读我在网上看到的内容。

我只想要一个矩形上一个斜坡。我不喜欢这个功能。我观看的每个 tutorial/article/video 都解释了它们的 function/class 是如何工作的。有些人使用类列表和调用其中其他函数的函数。它变得非常抽象，现在对我来说已经太多了。

看来我需要有人为我真正地照顾好它。没有功能，也没有类。我只想将一个矩形向上移动一个 45 度斜率。

一个 YouTube 视频解释说我需要 y = mx + b。但没有说明如何使用这个功能。因此，如果有人有基本 45 度斜率的公式，并且可以在我自己的代码中告诉我如何在没有函数或类的情况下使用它，我将不胜感激。

在我理解它之后我可以制作我自己的功能和类来实现它。我对此的尝试是在我的斜坡图像后面制作一个矩形。这是错误的吗？我应该使用单行吗？

我的代码尝试：

import pygame
import sys

pygame.init()
clock = pygame.time.Clock()
screensize = (800, 600)
screen = pygame.display.set_mode(screensize)
colour = [(0, 0, 0), (255, 0, 0), (255, 255, 255), (114, 216, 242), (200, 200, 200), (255, 199, 241), (50, 50, 50)]
          # black 0    #red   1     #white    2      #light_blue 3    #gray   4        #light_pink  5   #dark_gray 6
moving_up = False
moving_down = False
moving_left = False
moving_right = False
gravity = 5


def collide(rect, rectangle_list):
    hit_list = []
    for rectangle in rectangle_list:
        if rect.colliderect(rectangle):
            hit_list.append(rectangle)
    return hit_list


def move(rect, movement, tiles):
    collision_types = {'top': False, 'bottom': False, 'right': False, 'left': False}

    rect.x += movement[0]
    hit_list = collide(rect, tiles)
    for tile in hit_list:
        if movement[0] > 0:
            rect.right = tile.left
            collision_types['right'] = True
        elif movement[0] < 0:
            rect.left = tile.right
            collision_types['left'] = True

    rect.y += movement[1]
    hit_list = collide(rect, tiles)
    for tile in hit_list:
        if movement[1] > 0:
            rect.bottom = tile.top
            collision_types['bottom'] = True
        elif movement[1] < 0:
            rect.top = tile.bottom
            collision_types['top'] = True
    return rect, collision_types

player_rect = pygame.Rect(100, 51, 50, 50)
while True:
    screen.fill(colour[6])
    pygame.draw.polygon(screen, (255, 0, 255), [(300, 500), (300, 550), (250, 550)])

# ~~~~~~ List of rectangles
    rectlist = []
    small_rect = pygame.Rect(200, 200, 50, 50)
    bottomrect_1 = pygame.Rect(0, screensize[1] - 50, screensize[0], 50)
    bottomrect_2 = pygame.Rect(300, screensize[1] - 100, screensize[0], 50)
    D_rect = pygame.Rect(250, screensize[1] - 100, 50, 50)
    rectlist.append(small_rect)
    rectlist.append(bottomrect_1)
    rectlist.append(bottomrect_2)

# ~~~~~~ Player Movement
    player_movement = [0, 0]
    if moving_up:
        player_movement[1] -= 2
    if moving_down:
        player_movement[1] += 2
    if moving_left:
        player_movement[0] -= 2
    if moving_right:
        player_movement[0] += 2

    player_movement[1] += gravity

# ~~~~~~ Player Collision
    my_rect, collision = move(player_rect, player_movement, rectlist)







    # my attempt at this diagonal humbug. D_rect is the diagonal rect. (the slope)
    if my_rect.colliderect(D_rect):
        yy = D_rect.height + (my_rect.x - D_rect.x) * 1
        my_rect.y -= yy/3.6







# ~~~~~~ Event Loop
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                pygame.quit()
                sys.exit()
            if event.key == pygame.K_w:
                moving_up = True
            if event.key == pygame.K_s:
                moving_down = True
            if event.key == pygame.K_a:
                moving_left = True
            if event.key == pygame.K_d:
                moving_right = True
            if event.key == pygame.K_SPACE:
                gravity = -gravity

        if event.type == pygame.KEYUP:
            if event.key == pygame.K_w:
                moving_up = False
            if event.key == pygame.K_s:
                moving_down = False
            if event.key == pygame.K_a:
                moving_left = False
            if event.key == pygame.K_d:
                moving_right = False

    # ~~~~~~ Draw.
    pygame.draw.rect(screen, (0, 255, 125), D_rect, 1)
    pygame.draw.rect(screen, colour[3], small_rect)
    pygame.draw.rect(screen, colour[4], my_rect)
    pygame.draw.rect(screen, colour[5], bottomrect_1)
    pygame.draw.rect(screen, colour[5], bottomrect_2)
    pygame.display.update()
    clock.tick(60)

Answer 1

计算移动矩形(my_rect.right)右边缘对角矩形的高度：

dia_height = D_rect.height * (my_rect.right-D_rect.left) / D_rect.width

计算移动矩形右边缘对角线矩形的顶部：

D_rect_top = D_rect.bottom - round(dia_height)

移动矩形右边缘对角线矩形的顶部是移动矩形的底部：

my_rect.bottom = D_rect_top

如果对角线方向相反，求对角线在左边(my_rect.left)而不是右边(my_rect.right)的高度。

公式y = mx + b隐藏在这段代码中：

x 是 my_rect.right - D_rect.left
m 是 -D_rect.height / D_rect.width
b 是 D_rect.bottom
y 是 my_rect.bottom

while True:
    # [...]

    if my_rect.colliderect(D_rect):
        dia_height = D_rect.height * (my_rect.right-D_rect.left) / D_rect.width
        D_rect_top = D_rect.bottom - round(dia_height)
        my_rect.bottom = D_rect_top

    # [....]

45度斜坡怎么撞？

How can i collide with a 45 degree slope?

python

pygame

collision

rect