Fx3 wrote:
- How do I simulate a noisy TV screen, no syntonized channel?
i knew losing my demo would come back to haunt me.
i once made a flawless demo of this for xt.
i have no idea how i got it working.
it was like tv static during an acid trip. -.-
i will get back to this later if someone doesn't come up with a better idea first.
use lots of palette cycling, and use interrupts to make the scanlines wiggle left and right.
also refer to my MISHAP scaler routine i am planning on showing the algorithm for soon. as it works great for making dynamic 'glint'. (is that even a word?)
also be sure to have two different completely wrong parallaxing layers.
one layer should have a fake offscreen region that is transparent which wanders randomly left to right while scrolling in loop vertically at variable rate. (google VHS/NTSC signal bounding region)
one way to adjust variable rate in similar fashion is to make a random number for how many frames to wait to adjust the vertical scroll rate, then when the timer triggers, weighted average the current scroll rate with a new one.
for horizontal wander scroll rate/position you can google 'wander ai' where the object faces a specific direction with a steering wheel mounted always slightly in front of the object on the ray of the vector it is facing.
then have a dot randomly increment in degrees around that wheel relative to which way is futhest from the object within its steering wheel.
then have the object rotate the direction it faces based off the vector from the object to the invisible dot on its invisible steering wheel relative to the current direction faced.
also be sure to have the object constantly walk foreward in the direction it is facing, this results in a really freakish pong ball when you have it bounce of a bounding region.
thus you can have that one wandering 'pong ball's x be the horizontal offset of the wrapped scanlines, and the y axis of it, be the rate at which it scrolls the wrap horizontally.
this is hard to understand and prolly makes little sense unless you already know about various behavioral ai to some extent.
i will upload youtube video with a tutorial on this stuff once i get my replacement os discs in the mail around the 30th of this month, (september 2008), as soon as i can get the damn laptop running smoothly and have personal time off to work on the video tutorial series.
anyways just google 'behavoral ai', 'pathfinding ai' etc. and google 'weighted average' etc until you find something that resembles what in god's name i am talking about with actual interactive illustrations.
i will post the tv-static / "EVP" how-to tutorial vids as soon as i have the equipment, time, and patience to make them.
(By EVP i mean snow that actually resembles something living, like the Electronic Voice Print in the movie 'White Noise'.)