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Merge pull request #20 from TheRedDaemon/mirror_center_offset
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Allow to set mirroring center
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@gynt
gynt authored Sep 22, 2021
2 parents 9f87116 + 8e77022 commit 46b56f2
Showing 1 changed file with 125 additions and 33 deletions.
158 changes: 125 additions & 33 deletions shc-mapeditortools.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -131,13 +131,23 @@ end
--[[
A simple rounding to full numbers function.
Note: 0.5 -> 1, but -0.5 -> 0
source: https://scriptinghelpers.org/questions/4850/how-do-i-round-numbers-in-lua-answered
@TheRedDaemon
]]--
local function round(x)
return x + 0.5 - (x + 0.5) % 1
--[[
Round towards positive infinity: 0.5 -> 1, but -0.5 -> 0
source: https://scriptinghelpers.org/questions/4850/how-do-i-round-numbers-in-lua-answered
]]--
--local modNum = 1

--[[
Round towards positive and negative infinity: 0.5 -> 1 and -0.5 -> -1
source: https://love2d.org/forums/viewtopic.php?p=208676#p208676
]]--
local modNum = x >= 0.0 and 1 or -1

local n = x + 0.5 * modNum
return n - n % modNum
end


Expand Down Expand Up @@ -1747,24 +1757,26 @@ local function applyMirror(config, coordlist, size)
end

-- @TheRedDaemon: Create mirroring function.
local invertPos = 400 - size
local translationX = config.mirrorCenterX - size / 2.0
local translationY = config.mirrorCenterY - size / 2.0

local mirrorFunc = nil
if mirrorMode == "point" then
mirrorFunc = function(x, y) return {invertPos - x, invertPos - y} end
mirrorFunc = function(x, y) return translationX + translationX - x, translationY + translationY - y end
elseif mirrorMode == "horizontal" then
mirrorFunc = function(x, y) return {invertPos - y, invertPos - x} end
mirrorFunc = function(x, y) return translationX + translationY - y, translationX + translationY - x end
elseif mirrorMode == "vertical" then
mirrorFunc = function(x, y) return {y, x} end
mirrorFunc = function(x, y) return translationX - translationY + y, translationY - translationX + x end
elseif mirrorMode == "diagonal_x" then
mirrorFunc = function(x, y) return {x, invertPos - y} end
mirrorFunc = function(x, y) return x, translationY + translationY - y end
elseif mirrorMode == "diagonal_y" then
mirrorFunc = function(x, y) return {invertPos - x, y} end
mirrorFunc = function(x, y) return translationX + translationX - x, y end
elseif mirrorMode == "quadrant_before" then
mirrorFunc = function(x, y) return {invertPos - y, x} end
mirrorFunc = function(x, y) return translationX + translationY - y, translationY - translationX + x end
elseif mirrorMode == "quadrant_after" then
mirrorFunc = function(x, y) return {y, invertPos - x} end
mirrorFunc = function(x, y) return translationX - translationY + y, translationX + translationY - x end
else -- @TheRedDaemon: Do nothing. Fails silently.
mirrorFunc = function(x, y) return {x, y} end
mirrorFunc = function(x, y) return x, y end
end

local coordOrder = config.coordOrder
Expand All @@ -1774,7 +1786,8 @@ local function applyMirror(config, coordlist, size)
local index = 1
for _, coord in ipairs(coordlist) do
newCoordTable[index] = coord
newCoordTable[index + 1] = mirrorFunc(coord[1], coord[2])
local xPos, yPos = mirrorFunc(coord[1], coord[2])
newCoordTable[index + 1] = {round(xPos), round(yPos)}
index = index + 2
end
coordlist = newCoordTable
Expand All @@ -1784,7 +1797,8 @@ local function applyMirror(config, coordlist, size)
local numberOfCoords = #coordlist
for index = 1, numberOfCoords do
local coord = coordlist[index]
coordlist[numberOfCoords + index] = mirrorFunc(coord[1], coord[2])
local xPos, yPos = mirrorFunc(coord[1], coord[2])
coordlist[numberOfCoords + index] = {round(xPos), round(yPos)}
end
end -- no coordOrder fails silently

Expand All @@ -1805,11 +1819,13 @@ end


local DefaultMirror = DefaultBase:new{
mirrorMode = "point" , -- mirroring type: "horizontal", "vertical", "diagonal_x", "diagonal_y", "point",
-- "quadrant_before", "quadrant_after"
coordOrder = "coord" , -- order of coordinates after mirroring: "shape", "coord"
mirrorMode = "point" , -- mirroring type: "horizontal", "vertical", "diagonal_x", "diagonal_y", "point",
-- "quadrant_before", "quadrant_after"
mirrorCenterX = 200.0 , -- x-coordinate of the mirror center
mirrorCenterY = 200.0 , -- y-coordinate of the mirror center
coordOrder = "coord" , -- order of coordinates after mirroring: "shape", "coord"

func = applyMirror ,
func = applyMirror ,

__name = "Mirror Feature Configuration", -- debug info
}
Expand Down Expand Up @@ -1853,9 +1869,6 @@ mirrorFieldUtil[DefaultMirror.__name].help = [[
Actions are mirrored around one axis.
WARNING:
- The in-game brush is currently only symmetrical when using the smallest and second smallest
brush. The missing upper left tile on bigger brushes is not mirrored. Neither is the slightly
uneven part of the "hill" or "mountain" terrain tools.
- Terrain tools like the plateau tool might not mirror the terrain tiles properly.
The transformation itself is properly mirrored, but the computed terrain (stone, dirt) might
yield issues. This is a result of how the game handles the tiles after the transformation.
Expand All @@ -1866,6 +1879,8 @@ mirrorFieldUtil[DefaultMirror.__name].help = [[
active false, true
mirrorMode / mode "horizontal", "vertical", "diagonal_x", "diagonal_y", "point",
"quadrant_before", "quadrant_after", "none", "off"
mirrorCenterX / x numbers
mirrorCenterY / y numbers
coordOrder / order "shape", "coord"]]


Expand Down Expand Up @@ -1930,6 +1945,86 @@ mirrorFieldUtil.mode = mirrorFieldUtil.mirrorMode



--[[ mirrorCenterX ]]--



-- table
mirrorFieldUtil.mirrorCenterX = {}



-- set
function mirrorFieldUtil.mirrorCenterX.set(config, field, value)
local res = isNumber(value)
if res then
config.mirrorCenterX = value
print("Set x-coordinate of mirror center to: ", value)
end
return res
end



-- help
mirrorFieldUtil.mirrorCenterX.help = [[
"mirrorCenterX", alias: "x"
The x-coordinate of the mirror center.
The map has a size of 400x400, with the center being at 200.
25.5, 200, 345, ... numbers
Default: ]] .. tostring(DefaultMirror.mirrorCenterX)



-- alias
mirrorFieldUtil.x = mirrorFieldUtil.mirrorCenterX




--[[ mirrorCenterY ]]--



-- table
mirrorFieldUtil.mirrorCenterY = {}



-- set
function mirrorFieldUtil.mirrorCenterY.set(config, field, value)
local res = isNumber(value)
if res then
config.mirrorCenterY = value
print("Set y-coordinate of mirror center to: ", value)
end
return res
end



-- help
mirrorFieldUtil.mirrorCenterY.help = [[
"mirrorCenterY", alias: "y"
The y-coordinate of the mirror center.
The map has a size of 400x400, with the center being at 200.
25.5, 200, 345, ... numbers
Default: ]] .. tostring(DefaultMirror.mirrorCenterY)



-- alias
mirrorFieldUtil.y = mirrorFieldUtil.mirrorCenterY




--[[ coordOrder ]]--


Expand Down Expand Up @@ -2079,8 +2174,8 @@ end

local DefaultRotationMirror = DefaultBase:new{
numberOfPoints = 2 , -- how many points will be the result (mirrors = numberOfPoints - 1)
rotationCenterX = 200 , -- x-coordinate of the rotation center
rotationCenterY = 200 , -- y-coordinate of the rotation center
rotationCenterX = 200.0 , -- x-coordinate of the rotation center
rotationCenterY = 200.0 , -- y-coordinate of the rotation center
coordOrder = "coord" , -- order of coordinates after mirroring: "shape", "coord"

func = applyRotationMirror ,
Expand Down Expand Up @@ -2128,9 +2223,6 @@ rotationFieldUtil[DefaultRotationMirror.__name].help = [[
The requested actions are evenly placed on a circle.
WARNING:
- The in-game brush is currently only symmetrical when using the smallest and second smallest
brush. The missing upper left tile on bigger brushes is not mirrored. Neither is the slightly
uneven part of the "hill" or "mountain" terrain tools.
- Terrain tools like the plateau tool might not mirror the terrain tiles properly.
The transformation itself is properly mirrored, but the computed terrain (stone, dirt) might
yield issues. This is a result of how the game handles the tiles after the transformation.
Expand All @@ -2140,8 +2232,8 @@ rotationFieldUtil[DefaultRotationMirror.__name].help = [[
Parameter Possible values
active false, true
numberOfPoints / points >= 1
rotationCenterX / x whole numbers
rotationCenterY / y whole numbers
rotationCenterX / x numbers
rotationCenterY / y numbers
coordOrder / order "shape", "coord"]]


Expand Down Expand Up @@ -2205,7 +2297,7 @@ rotationFieldUtil.rotationCenterX = {}

-- set
function rotationFieldUtil.rotationCenterX.set(config, field, value)
local res = isInteger(value)
local res = isNumber(value)
if res then
config.rotationCenterX = value
print("Set x-coordinate of rotation center to: ", value)
Expand All @@ -2222,7 +2314,7 @@ rotationFieldUtil.rotationCenterX.help = [[
The x-coordinate of the rotation center.
The map has a size of 400x400, with the center being at 200.
25, 200, 345, ... whole numbers
25.5, 200, 345, ... numbers
Default: ]] .. tostring(DefaultRotationMirror.rotationCenterX)

Expand All @@ -2245,7 +2337,7 @@ rotationFieldUtil.rotationCenterY = {}

-- set
function rotationFieldUtil.rotationCenterY.set(config, field, value)
local res = isInteger(value)
local res = isNumber(value)
if res then
config.rotationCenterY = value
print("Set y-coordinate of rotation center to: ", value)
Expand All @@ -2262,7 +2354,7 @@ rotationFieldUtil.rotationCenterY.help = [[
The y-coordinate of the rotation center.
The map has a size of 400x400, with the center being at 200.
25, 200, 345, ... whole numbers
25.5, 200, 345, ... numbers
Default: ]] .. tostring(DefaultRotationMirror.rotationCenterY)

Expand Down

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