75 lines
2.2 KiB
Lua
75 lines
2.2 KiB
Lua
|
local comparisons = {}
|
||
|
|
|
||
|
|
function comparisons.zsort(itemA, itemB)
|
||
|
|
local _, aY, aZ, _, aH, aD = itemA.mainHitbox:getCube()
|
||
|
|
local aDepth, aID, aType
|
||
|
|
aDepth = itemA.depth
|
||
|
|
aID = itemA.creationID
|
||
|
|
aType = itemA.type
|
||
|
|
aZ = math.ceil(aZ)
|
||
|
|
aY = math.ceil(aY)
|
||
|
|
|
||
|
|
local _, bY, bZ, _, bH, bD = itemB.mainHitbox:getCube()
|
||
|
|
local bDepth, bID, bType
|
||
|
|
bDepth = itemB.depth
|
||
|
|
bID = itemB.creationID
|
||
|
|
bType = itemB.type
|
||
|
|
bZ = math.ceil(bZ)
|
||
|
|
bY = math.ceil(bY)
|
||
|
|
|
||
|
|
|
||
|
|
--print("comparing " .. aID .. " to " .. bID)
|
||
|
|
|
||
|
|
--print("a", aY, aZ, aH, aD, aDepth, aID, itemA.type)
|
||
|
|
--print("b", bY, bZ, bH, bD, bDepth, bID, itemB.type)
|
||
|
|
|
||
|
|
local comparison = 0
|
||
|
|
|
||
|
|
if aZ >= bZ + bD then
|
||
|
|
-- item A is completely above item B
|
||
|
|
--graph:add(itemB, itemA)
|
||
|
|
comparison = 1
|
||
|
|
elseif bZ >= aZ + aD then
|
||
|
|
-- item B is completely above item A
|
||
|
|
--graph:add(itemA, itemB)
|
||
|
|
comparison = -1
|
||
|
|
elseif aY + aH <= bY then
|
||
|
|
-- item A is completely behind item B
|
||
|
|
--graph:add(itemA, itemB)
|
||
|
|
comparison = -1
|
||
|
|
elseif bY + bH <= aY then
|
||
|
|
-- item B is completely behind item A
|
||
|
|
--graph:add(itemB, itemA)
|
||
|
|
comparison = 1
|
||
|
|
elseif aY + aH > bY + bH then --(aY - aZ) + aH > (bY - bZ) + bH then
|
||
|
|
-- item A's forward-most point is in front of item B's forward-most point
|
||
|
|
--graph:add(itemB, itemA)
|
||
|
|
comparison = 1
|
||
|
|
elseif aY + aH < bY + bH then --aY < (bY - bZ) + bH then
|
||
|
|
-- item B's forward-most point is in front of item A's forward-most point
|
||
|
|
--graph:add(itemA, itemB)
|
||
|
|
comparison = -1
|
||
|
|
else
|
||
|
|
-- item A's forward-most point is the same than item B's forward-most point
|
||
|
|
if aDepth > bDepth then
|
||
|
|
--graph:add(itemB, itemA)
|
||
|
|
comparison = 1
|
||
|
|
elseif aDepth < bDepth then
|
||
|
|
--graph:add(itemA, itemB)
|
||
|
|
comparison = -1
|
||
|
|
else
|
||
|
|
if aID > bID then
|
||
|
|
--graph:add(itemA, itemB)
|
||
|
|
comparison = 1
|
||
|
|
elseif aID < bID then
|
||
|
|
--graph:add(itemB, itemA)
|
||
|
|
comparison = -1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
return comparison == -1
|
||
|
|
end
|
||
|
|
|
||
|
|
return comparisons
|