movingBall02T2.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
目標：使用向量讓小球移動，並且撞牆反彈
核心概念
1. 引入向量套件 pygame.math.Vector2 
2. 製作移動 ballP += BallV 
3. 偵測撞牆反彈 ballV.x *= -1 if ballP.x > ...  
'''
import pygame
from pygame.math import Vector2

screen = pygame.display.set_mode((640,480))
done = False
ballP = Vector2(10,10)
ballV = Vector2(5,3)
barW = 60
barH = 30
barY = 400
while not done:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True    
    screen.fill((0,255,0))
    pygame.draw.circle(screen, (50,50,250),[int(ballP.x),int(ballP.y)],10)
    mouseX, mouseY = pygame.mouse.get_pos()
    pygame.draw.rect(screen,(0,128,128),[mouseX,barY,barW,barH])
    pygame.display.update()