Bitmap Distortion

[Dargor]

Hello.

First of all, if you recall in RM2K/2, there's an option in Move Picture which distort the picture. My question is, is there a script dto do this?
ONe other thing. If there's no script for this, i'd like if someone could teach me a lil' bit the Bitmap class. My goal is to make distortion effects like in ff6 (House on fire, Dischord Skill, ect)

Thanks

EDIT:
Here's my slant bar code

for i in -10..10
   if i <=0
      self.contents.fill_rect(50 - i, 50 + 10 - i, 150 + 1, 1, Color.new(50, 50, 50, 255))
   else
      self.contents.fill_rect(50 + i, 50 + 10 - i, 150 + 1, 1, Color.new(50, 50, 50, 255))
   end
end

The lines above draws something that look like an arrow. I'm trying to animate every horizontal lines of pixel to do a "wave" effect in bitmaps but i don't know how do slant a bitmap

-Dargor

 

[verballydecapitating]

I have tried some filtering effects but they are done on a per pixel basis and are far too sluggish to use, even the invert colour filter was laggy. I'm not sure if there are any other ways of doing it.

 

[Dargor]

well, it's interresting.
May i take a look at it?

 

[verballydecapitating]

Might not be the 'distortion' you were looking for, I just wrote this stuff up now, if you want something else just say, and yeah this may be a bit hard to read, I tried to keep it short for performance. It is still veery slow.

Spoiler

class Bitmap

	def brighten(amount)
		for w in 0..(width - 1)
			for h in 0..(height - 1)
				colour = get_pixel(w, h)
				set_pixel(w, h, Color.new([colour.red + amount, 255].min, [colour.green + amount, 255].min, [colour.blue + amount, 255].min, colour.alpha)) if colour.alpha > 0
			end
		end
		return self
	end
	
	def pixelate(size = 2)
		for w in 0..((width - 1) / size)
			w *= size
			for h in 0..((height - 1) / size)
				h *= size
				r, g, b, a = 0, 0, 0, 0
				size.times do |i|
					colour = get_pixel(w, h)
					r += colour.red; g += colour.green; b += colour.blue; a += colour.alpha
					colour = get_pixel(w + i, h)
					r += colour.red; g += colour.green; b += colour.blue; a += colour.alpha
					colour = get_pixel(w, h + i)
					r += colour.red; g += colour.green; b += colour.blue; a += colour.alpha
				end
				fill_rect(w, h, size, size, Color.new( r / size**2, g / size**2, b / size**2, a / size**2))
			end
		end
	end
	
	def darken(amount)
		for w in 0...width
			for h in 0...height
				colour = get_pixel(w, h)
				set_pixel(w, h, Color.new([colour.red - amount, 0].max, [colour.green - amount, 0].max, [colour.blue - amount, 0].max, colour.alpha)) if colour.alpha > 0
			end
		end
		return self
	end
	
	def invert
		for w in 0..(width - 1)
			for h in 0..(height - 1)
				colour = get_pixel(w, h)
				set_pixel(w, h, Color.new(255 - colour.red, 255 - colour.green, 255 - colour.blue, colour.alpha)) if colour.alpha > 0
			end
		end
		return self
	end
	
	def to_greyscale
		for w in 0...width
			for h in 0...height
				colour = get_pixel(w, h)
				a = colour.alpha
				if a > 0
					num = (colour.red + colour.green + colour.blue) / 3
					set_pixel(w, h, Color.new(num, num, num, a))
				end
			end
		end
		return self
	end
	
	def scatter(passes = 1)
		for pass in 1..passes
			for w in 0...width
				for h in 0...height
					set_pixel(w, h, get_pixel(w + rand(3) - 1, h + rand(3) - 1))
				end
			end
		end
		return self
	end
	
end

http://img84.imageshack.us/img84/3225/effectsav9.png[/img]

 

[Dargor]

This is nice! Even if it may be slow, it's interresting. It's not what i'm lookinf for though. If you can, take a look at FF6 title screen, you'll see a fire sprite (begind the title) moving from left to right like the picture option you had in rm2k3.

But still, your script is nice!

-Dargor

 

[verballydecapitating]

An animated sprite would work a lot better than distorting the bitmap.

 

[~Atlaswing~]

Distortion of bitmap class is very difficult for the system so distorting in horizontal lines need enough scripting knowledge.. Did you try checking the PLANE class rewritten by Selwyn?

 

[Dargor]

No i didn't. But why should i use a Plane?