Trigonometry Circle

#Made by Folufi
import pygame, math

pygame.init()
pygame.font.init()
#Color
red = (255, 0, 0)
yellow = (255, 255,0)
green = (0, 255, 0)
blue = (0, 0, 255)
black = (0, 0, 0)
white = (255, 255, 255)

#Window configs
resolution = (800, 600)
screen = pygame.display.set_mode(resolution)
title = pygame.display.set_caption("Trigonometry circle")
clock, fps = pygame.time.Clock(), 60

#Rotation matrice
def rotate(x, y, deg):
    s = math.sin(deg/180*math.pi)
    c = math.cos(deg/180*math.pi)

    if deg == 90 or deg == -90:
        s = 1
    elif deg == 270 or deg == -270:
        s = -1

    if deg == 180 or deg == -180:
        c = -1
    elif deg == 0 or deg == 360:
        c = 1

    return x*c-y*s, x*s+y*c

def create_text(text, pos, size, color):
    font = pygame.font.SysFont("Calibri", size)
    text_surf = font.render(text, 1, color)
    text_rect = text_surf.get_rect()
    text_rect.center = pos

    screen.blit(text_surf, text_rect)

#App
def app():
    closed = False

    #Coordinations
    pos = (200, 0) #Radius coordination
    angle = 0

    points = []
    while not closed:
        screen.fill(black)
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                closed = True

        #Trigonometry
        pos2 = rotate(pos[0], pos[1], angle)
        angle += .4 #You can change rotation speed here!
        s, c, t = math.sin(angle/180*math.pi), math.cos(angle/180*math.pi), math.tan(angle/180*math.pi)

        #Axis
        pygame.draw.line(screen, white, (400-250, 300), (400+250, 300)) #X axis
        pygame.draw.line(screen, white, (400, 300-250), (400, 300+250))#Y axis

        #Line and circle
        pos3 = rotate(pos[0]/4, pos[1], angle)
        points.append(pos3)

        for x, y in points:
            pygame.draw.line(screen, white, (x+400, y+300), (x+400, y+300), 1)


        pygame.draw.line(screen, green, (400, 300),(pos2[0]+400, pos2[1]+300))#Rotating line
        pygame.draw.circle(screen, white, (400, 300), 200, 1)

        pygame.draw.line(screen, red, (pos2[0]+400, pos2[1]+300), (pos2[0]+400, (pos2[1]+300)-(pos2[1]+300 - 300)))#Sine line
        pygame.draw.line(screen, blue, (pos2[0]+400, (pos2[1]+300)-(pos2[1]+300 - 300)), (400, (pos2[1]+300)-(pos2[1]+300 - 300)))#Cosine line

        #Texts
        create_text("Sine: "+str(s*-1), (630, 485), 15, red) #Sine
        create_text("Cosine: "+str(c), (630, 500), 15, blue) #Cosine
        create_text("Tangent: "+str(t*-1), (630, 515), 15, yellow) #Tangent

        create_text("Angle: "+str(round(angle*-1, 2))+"(degrees) / "+str(round((angle*-1/180*math.pi), 4))+"(radians)", (630, 530), 15, white)


        #Angle adjustment
        if angle > 360:
            angle -= 360
            points = []
        elif angle < -360:
            angle += 360
            points = []

        pygame.display.flip()
        clock.tick(fps)
app()
pygame.quit()