Difference between revisions of "Talk:Field of Vision"

From RogueBasin
Jump to navigation Jump to search
(Simple and accurate LOS function)
(Cut new code (preparing to paste))
Line 3: Line 3:
:As I understand it, field of vision is an algorithm for determining everything is visible. Line of sight is about determining whether a particular square is visible. The former can be created with the latter, but it may be inefficient to do it that way. [[User:Duerig|Duerig]] 20:44, 23 Apr 2007 (CEST)
:As I understand it, field of vision is an algorithm for determining everything is visible. Line of sight is about determining whether a particular square is visible. The former can be created with the latter, but it may be inefficient to do it that way. [[User:Duerig|Duerig]] 20:44, 23 Apr 2007 (CEST)


== Simple and accurate LOS function ==
Gbox, I am moving your code. It needs its own article rather than being hidden in a talk page somewhere. [[User:Duerig|Duerig]] 07:36, 12 June 2008 (CEST)
 
<pre><nowiki>
'// Code is [http://www.Blitzbasic.com BlitzMax]
 
Function UpdateLOS(m:tMonster, UpdateMap:Int = True)
If m = Null Then RuntimeError("Null in LOScheck!")
Local XX:Int, YY:Int '// Clear LOS flag from previous //
For xx = 0 To MAPWIDTH - 1
For yy = 0 To MAPHEIGHT - 1
If Map[xx, yy].InLOS = True Then
Map[xx, yy].HasSeen = True '// HasSeen cells are marked dark
Map[xx, yy].InLOS = False
EndIf
Next
Next
 
For Local angle:Float = 1 To 360 Step 0.18 '// fractional amount gives better resolution [0.1 causes sight though doors, > 0.2 creates gaps. 0.18 seems the sweet spot
Local dist:Int = 0
Local x:Float = Float(m.X) + 0.5 '//M.x and M.y are player/monster current map location
Local y:Float = Float(m.y) + 0.5
Local xmove:Float = Cos(angle)
Local ymove:Float = Sin(angle)
Repeat
x = x + xmove
y = y + ymove
dist = dist + 1
If dist >= m.Vision Then Exit  '// M.vision is the range of sight
If X >= MAPWIDTH Then Exit
If y >= MAPHEIGHT Then Exit
If x < 0 Then Exit
If y < 0 Then Exit
Map[x, y].InLOS = True
If Map[x, y].BlockVision Then Exit '// Map[,].Blockvision is for walls/closed doors ect
Forever
Next
 
End Function
</nowiki></pre>

Revision as of 05:36, 12 June 2008

Anyone cares to clarify what is the difference between Field of Vision and Line of Sight??? --Slash 18:08, 8 Apr 2006 (CEST)

As I understand it, field of vision is an algorithm for determining everything is visible. Line of sight is about determining whether a particular square is visible. The former can be created with the latter, but it may be inefficient to do it that way. Duerig 20:44, 23 Apr 2007 (CEST)

Gbox, I am moving your code. It needs its own article rather than being hidden in a talk page somewhere. Duerig 07:36, 12 June 2008 (CEST)

Retrieved from "http://roguebasin.com/index.php?title=Talk:Field_of_Vision&oldid=13184"