[英]Why is Processing.py skipping the second-to-last item of my array?
I've been making a sort of abstract-art style thing in Processing. 我一直在加工中制作一种抽象艺术风格的东西。 Left click is place a point, click again and it'll make a random line, right click to make a new point.
左键单击放置一个点,再次单击它将生成一个随机行,右键单击以创建一个新点。
The problem comes in when I use the up and down arrows to pick a pen color. 当我使用向上和向下箭头选择笔颜色时,会出现问题。 The second to last item (either black or pink) is skipped when I use these keys.
当我使用这些键时,跳过倒数第二个项目(黑色或粉红色)。 Code is attached.
代码附后。
def setup():
size(750, 750)
background(255)
global clicks
global selector
global fillcolors
fillcolors = [0x80FFFFFF, 0x80000000, 0x80FF0000, 0x8000FF00, 0x800000FF, 0x80FFFF00, 0x80FF00FF, 0x8000FFFF]
selector = 1
clicks = 0
ellipseMode(CENTER)
fill(255, 255, 255, 128)
def draw():
ellipse(50, 50, 50, 50)
def mousePressed():
global x
global y
global clicks
if (mouseButton == LEFT) and (clicks == 0):
x = mouseX
y = mouseY
clicks = 1
if (mouseButton == LEFT) and (0 < clicks < 11):
line(x, y, x+random(-300, 300), y+random(-300, 300))
clicks += 1
if (mouseButton == LEFT) and (clicks == 11):
wide = random(300)
clicks = 1
line(x, y, x+random(-300, 300), y+random(-300, 300))
ellipse(x, y, wide, wide)
if mouseButton == RIGHT:
clicks = 0
def keyPressed(): # this is the color selector area.
global selector
global fillcolors
global clicks
clicks = 0
if key != CODED:
background(255)
elif key == CODED:
if keyCode == UP:
if selector < 8: # something in here is causing the second-to-last item of the array to be skipped.
fill(fillcolors[selector])
selector += 1
if selector == 7:
fill(fillcolors[selector])
selector = 0
if keyCode == DOWN:
if selector > 0:
fill(fillcolors[selector])
selector -= 1
if selector == 0:
fill(fillcolors[selector])
selector = 7
Your first if
in each case affects your second. 你的第一个
if
在每一种情况下会影响你的第二个。 For UP
, if selector
is 6, it becomes 7, and then matches selector == 7
; 对于
UP
,如果selector
为6,则变为7,然后匹配selector == 7
; for DOWN
, if selector is 1, it becomes 0, and then matches selector == 0
. 对于
DOWN
,如果selector为1,则它变为0,然后匹配selector == 0
。
Use elif
to make them exclusive: 使用
elif
使它们成为独家:
if selector < 8:
fill(fillcolors[selector])
selector += 1
elif selector == 7:
fill(fillcolors[selector])
selector = 0
if selector > 0:
fill(fillcolors[selector])
selector -= 1
elif selector == 0:
fill(fillcolors[selector])
selector = 7
and your first condition should probably be if selector < 7
rather than 8
. 你的第一个条件可能是
if selector < 7
而不是8
。
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