My Pygame Game Engine
keii.dev
1## Imports
2
3import pygame, math
4
5## Class
6
7class math_utils:
8
9 ## Function for rotating a image around its center in pygame
10
11 def rotate_center(self, image, angle, x, y):
12
13 # Rotate the image
14
15 rotated_image = pygame.transform.rotate(image, angle)
16
17 # Center the image to its designated x and y coordinate to couteract the wierd rotation in pygame
18
19 new_rect = rotated_image.get_rect(center = image.get_rect(center = (x, y)).center)
20
21 return rotated_image, new_rect
22
23 ## Pythagoras Theorem that returns the hypotenus
24
25 def distance_between_points(self, x1, y1, x2, y2):
26 return math.hypot(x2 - x1, y2 - y1)
27
28 ## Gets the direction from one Vector2 to another Vector2 in degrees
29
30 def direction_between_points(self, x1, y1, x2, y2):
31 radians = math.atan2(y2-y1, x2-x1)
32 return(math.degrees(radians))
33
34 ## Gets the difference between angles
35
36 def angle_difference(self, x, y):
37 return math.atan2(math.sin(x-y), math.cos(x-y))
38
39 ## Two functions that return the Vector2 from (0, 0) if you were to go at an angle at a speed for example
40 ## length=2 and angle=45 would go to (1.4, 1.4)
41 ## This is useful for example cars in topdown that usually move in a 360 direction
42
43 def lengthdir_x(self, length, angle):
44 radian_angle = angle * math.pi / 180
45 return length * math.cos(radian_angle)
46
47 def lengthdir_y(self, length, angle):
48 radian_angle = angle * math.pi / 180
49 return length * math.sin(radian_angle)
50
51 ## Returns if a Vector2 is in a rectangle
52
53 def in_rect(self, x, y, rectx, recty, width, height):
54 if x > rectx and x < rectx + width:
55 if y > recty and y < recty + height:
56 return True
57 return False