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old Return true if line from pos to pos is clear

Deleted User

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Hello guys!
Im making a project and I need help,
How to make a function that will return true if the line from the position1 to position2 is obstacle free?

and

how to rotate image to position?

Thanks

old Re: Return true if line from pos to pos is clear

Bowlinghead
User Off Offline

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I think user Infinite Rain means lua...
(Its in "Scripts" section!)

You can use

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if tile(x,y,"walkable") then
or
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if tile(x,y,"obstacle")~=true then

And this can help (Never worked with):
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imagepos(id,x,y,rot)		Changes position and rotation (0°-360°) of an image
edited 2×, last 18.10.11 04:16:50 pm

old Re: Return true if line from pos to pos is clear

DannyDeth
User Off Offline

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the coordinates are in tiles:
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function checkClearPath(start_x,start_y,destination_x,destination_y)
	rot = math.atan2(destination_y - start_y,desitnation_x - start_x ) -- finds rotation
	local tmpx = start_x; local tmpy = start_y -- these are used to store currect pos
	while(tmpx < destination_x and tmpy < destination_y) do --fixed it :)
		tmpx = tmpx + math.cos(rot)
		tmpy = tmpy + math.sin(rot)
		if not tile(tmpx,tmpy,"walkable") then
			return false
		end
	end
	return true
end
edited 1×, last 18.10.11 05:05:00 pm

old Re: Return true if line from pos to pos is clear

HeroBurak
BANNED Off Offline

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user DannyDeth has written
the coordinates are in tiles:
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function checkClearPath(start_x,start_y,destination_x,destination_y)
	rot = math.atan2(destination_y - start_y,desitnation_x - start_x ) -- finds rotation
	local tmpx = start_x; local tmpy = start_y -- these are used to store currect pos
	while(tmpx < destination_x and tmpy < destination_y) do --fixed it :)
		tmpx = tmpx + math.cos(rot)
		tmpy = tmpy + math.sin(rot)
		if not tile(tmpx,tmpy,"walkable") then
			return false
		end
	end
	return true
end



Slight improvement:

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function checkClearPath(start_x,start_y,destination_x,destination_y)
	rot = math.atan2(destination_y - start_y,destination_x - start_x ) -- finds rotation
	local tmpx = start_x; local tmpy = start_y -- these are used to store currect pos
	local xincrement = math.cos(rot); local yincrement = math.sin(rot)
	while(tmpx < destination_x and tmpy < destination_y) do --fixed it :)
		tmpx = tmpx + xincrement
		tmpy = tmpy + yincrement
		if not tile(tmpx,tmpy,"walkable") then
			return false
		end
	end
	return true
end

old Re: Return true if line from pos to pos is clear

MikuAuahDark
User Off Offline

Quote
it uses tile:
code:
Spoiler >

bdw it's uses rectangular area. sorry if im wrong!
edited 2×, last 20.10.11 08:47:51 am

old Re: Return true if line from pos to pos is clear

Apache uwu
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btw there's no point in putting a semicolon, this isn't php or java

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local tmpx = start_x local tmpy = start_y

or

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local tmpx = start_x
	local tmpy = start_y

or

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local tmpx,tmpy = start_x,start_y

@how to rotate image to position?

Could use tween_rotate. If you want to find the angle use

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angle=Math.atan(y1-y2,x1-x2)

old Re: Return true if line from pos to pos is clear

DannyDeth
User Off Offline

Quote
@Textual Context:
You don't know everything, putting:
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local xincrement = (blablabla) local yincrement = (blablabla)
Will yield you nothing but an error. The semi-colon is there to separate the two statements.

Edit: Eh. Turns out I was wrong. NVMD! You do know everything.

Edit2: It's still bad form, though. The semi-colon makes it more readable.
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