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--- preview [2020/04/22 11:48] – vjraymon
+++ preview [2021/10/15 10:43] (current) – removed maxime
@@ Line 1: / Line 1: @@
-====== Custom component: how to compute ground or water elevation ======
-Since 1.5, Foundation allows to mod Custom component and links it to a fbx (see Exemple02)
-The following LUA code computes and returns the global Y elevation of water from a global position:
- function MY_CUSTOM_COMPONENT:computeWaterElevation(_globalPosition)
-    local raycastResult = {}
-    -- Raycast from the _globalPosition + 1000
-    -- to _globalPosition - 1000
-    -- only on objects with a WATER flag
-    local FromPosition = { _globalPosition[1], _globalPosition[2]+1000, _globalPosition[3] }
-    local ToPosition = { _globalPosition[1], _globalPosition[2]-1000, _globalPosition[3] }
-    if not self:getLevel():rayCast(FromPosition,
-                                   ToPosition,
-                                   raycastResult,
-^ OBJECT_FLAG.WATER:toNumber()) then
-         MyMod:logWarning("MY_CUSTOM_COMPONENT: Water not found on the vertical of "
-                          .. tostring(_globalPosition))
-         return _globalPosition[2]
-    else
-         return raycastResult["Position"][2]
-    end
- end
-You can do the same with the ground by replacing OBJECT_FLAG.WATER by OBJECT_FLAG.GROUND
-If the water (or the ground) is not found (for instance when the _globalPosition out of the map) then a warning is edited in the logs, and the code return the Y of the _globalPosition.