9 years
edited 8 years
This simple snippet allows you to check for the walkability of the terrain between two points.
Code (jass) Select
library IsLineWalkable /*
*/uses /*
*/TerrainPathability /*
- http://www.wc3c.net/showthread.php?t=103862 */
//! novjass
________________
| |
| Written by AGD |
|________________|
|=====|
| API |
|=====|
function IsLineWalkable takes real x1, real y1, real x2, real y2 returns boolean/*
- Checks if the line between points P1(x1, y1) and P2(x2, y2) does not contain any
any unwalkable coordinates including some doodads, cliffs, mapboundary, and other similar stuffs
*/function GetLastWalkableX takes nothing returns real/*
- Returns the value of the x-coordinate of the last walkable terrain when using IsLineWalkable
*/function GetLastWalkableY takes nothing returns real/*
- Returns the value of the y-coordinate of the last walkable terrain when using IsLineWalkable
*///! endnovjass
globals
///////////////////////////////////////////
// The path walkability check distance //
// interval. Lower value increases //
// precision but may cost performance. //
// Suggested value limit (10.00 - 25.00) //
///////////////////////////////////////////
private constant real checkInterval = 20.00
endglobals
//==============================================================================
globals
private real X
private real Y
endglobals
function IsLineWalkable takes real x1, real y1, real x2, real y2 returns boolean
local real dx = x2 - x1
local real dy = y2 - y1
local real angle
local real x
local real y
if dx*dx + dy*dy < checkInterval*checkInterval then
if not IsTerrainWalkable(x2, y2) then
set X = TerrainPathability_X
set Y = TerrainPathability_Y
return false
endif
else
set angle = Atan2(dy, dx)
set x = checkInterval*Cos(angle)
set y = checkInterval*Sin(angle)
loop
set x1 = x1 + x
set y1 = y1 + y
exitwhen x1 > x2 or y1 > y2
if not IsTerrainWalkable(x1, y1) then
set X = TerrainPathability_X
set Y = TerrainPathability_Y
return false
endif
endloop
endif
set X = TerrainPathability_X
set Y = TerrainPathability_Y
return true
endfunction
function GetLastWalkableX takes nothing returns real
return X
endfunction
function GetLastWalkableY takes nothing returns real
return Y
endfunction
endlibrary