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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
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CS2D
Scripts Return true if line from pos to pos is clear
Return true if line from pos to pos is clear
14 replies
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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
Infinite Rain has writtenhow to rotate image to position?
env_image? I think It was a bug because when I'm rotating and looking at the properties again It goes back to the normal position. BTW I can't help you with lua sorry
Infinite Rain means lua...(Its in "Scripts" section!)
You can use
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if tile(x,y,"walkable") then
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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
Infinite Rain has writtenHello guys!
How to make a function that will return true if the line from the position1 to position2 is obstacle free?
How to make a function that will return true if the line from the position1 to position2 is obstacle free?
create a recursive alogrithm
tile1 clear? ... tile2 clear?....
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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
I need somthing like:
freeline(x1, y1, x2, y2)
Thanks
LUA ERROR: sys/lua/server.lua:13: ')' expected near 'y'
(line 4)
destination_y
btw line 2 you wrote "desitnation"
DannyDeth has writtenthe 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
code:
bdw it's uses rectangular area. sorry if im wrong!
edited 2×, last 20.10.11 08:47:51 am
MikuAuahDark: That code of yours checks a rectangular area for at least 1 walkable tile. So it's not what Infinite Rain requested. 
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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)
You don't know everything, putting:
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local xincrement = (blablabla) local yincrement = (blablabla)
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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