My first Pygame program, it's a virtual tachometer using rpm data from python-obd. I pass the original image each time to rotate, but still getting distortion with angles other than 0, 90, 180...etc. Am I missing something? * The needle image rotates around center, half of it is transparent.
import pygame
from pygame.locals import *
import time
from buttonClass import *
import obd
obd.logger.setLevel(obd.logging.DEBUG)
connection = obd.Async("\\.\\COM3")
pygame.init()
screen = pygame.display.set_mode((800,480))
pygame.display.set_caption('Virtual Dash')
rpm = 0
def rpm_gauge():
gauge_image = pygame.image.load(r"C:\Users\olinr\CS121\gaugecrop.jpg")
rpm_gauge = pygame.transform.scale(gauge_image, (281,280))
return rpm_gauge
def gauge_needle():
needle_image = pygame.image.load(r"C:\Users\olinr\CS121\needtransp.png")
needle = pygame.transform.scale(needle_image, (270, 4))
#needle.set_colorkey((0,0,0))
return needle
# def rotate_needle(needle, angle):
# rotated_needle = pygame.transform.rotate(needle, angle)
# return rotated_needle
def get_rpm(r):
global rpm
if not r.is_null():
rpm = int(r.value.magnitude)
def update_fps():
fps = str(int(clock.get_fps()))
fps_text = font.render(fps + " fps", 1, pygame.Color("coral"))
return fps_text
pivot = (340, 336.5)
run = True
clock = pygame.time.Clock()
connection.watch(obd.commands.RPM, callback=get_rpm)
connection.start()
angle = 0
while run:
screen.fill(black)
gauge = rpm_gauge()
angle = 36 * (rpm * -.001) + 90
needle_rotated = pygame.transform.rotate(gauge_needle(), angle)
screen.blit(gauge, (260,200))
screen.blit(needle_rotated, (400 - int(needle_rotated.get_width() / 2), 336 -
int(needle_rotated.get_height() / 2)))
screen.blit(update_fps(), (0, 350))
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
#clock.tick(120)
#rpm += 70
pygame.display.update()
pygame.display.flip()
pygame.quit()
