Figuring out best values for scrolling text, based on length

lolman8776 · May 27, 2016, 2:16pm

Epihaius:

lolman8776:
I was incorrect about my maths. Do you know someone who might know what maths to do? Also, here’s what I did:
leng = len(self.launcher.getOnlineNews())
X = base.win.getXSize() * 2 - leng / 2
If I did this incorrect, can someone fix it?
P.S Thank you for that code wezu. Conveniently, the class of the GUI the news thing is meant to be in IS inherited from DirectObject.
You seem to calculate “leng” as the number of characters in the text; instead, you should either use the code wezu gave you earlier if you’re using a TextNode, or you could call get_tight_bounds on an OnscreenText if that’s what you’re using to display the text.
Also note that base.win.getXSize gives you the window width in pixels, but if you parented your TextNode or OnscreenText to aspect2d, then you need to calculate the window width differently.
The following might help:
self.lastNews = OnscreenText(text="The latest news", scale=.07)
win_props = base.win.get_properties()
win_x_size = win_props.get_x_size()
win_y_size = win_props.get_y_size()
win_width = 2. * max(win_x_size, win_y_size) / win_y_size
text_min, text_max = self.lastNews.get_tight_bounds()
text_width = text_max.x - text_min.x
dist = win_width + text_width
X = dist * .5
speed = .75
T = dist / speed
self.newsSequence = self.lastNews.posInterval(T, (-X, 0., 0.), startPos=(X, 0., 0.))

Thank you very much. This code worked PERFECT. I don’t know how to thank you, really. Thank you sooooooooo very much!!!