Posts for vogosvagen

Posted: 11/9/2015 1:52 PM
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vogosvagen
Joined: 11/1/2015
Posts: 2
Thank you both, I won't say I understand how it works 100% but what you said definitely helped. I'm trying to understand the algorithm now. Taking it nice and slow.
Posted: 11/1/2015 7:01 PM
(Edited: 11/3/2015 10:48 AM)
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vogosvagen
Joined: 11/1/2015
Posts: 2
Hey Dwood15, I found a comment of yours on reddit, and found my self stumbling here. I'm currently going through the source code, and I'm having a bit of trouble understanding what the getTile(dx,dy) function does. From what I've gathered, it determines where mario is (page o, or page 1. As in a level contains 2 pages?), and determines which Tile is active(?). I'm talking about this part (super mario bros. part of the code): 
Language: lua
local subx = math.floor((x%256)/16)
		local suby = math.floor((y - 32)/16)
		local addr = 0x500 + page*13*16+suby*16+subx
		
		if suby >= 13 or suby < 0 then
			return 0
		end
		
		if memory.readbyte(addr) ~= 0 then
			return 1
		else
			return 0
		end
is there anyone who documented/commented over the source code?