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https://github.com/HamdyElzanqali/ldtk-love

LDtk loader for LÖVE.
https://github.com/HamdyElzanqali/ldtk-love

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LDtk loader for LÖVE.

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# ldtk-love

A simple [LDtk](https://ldtk.io/) loader for [LÖVE](https://love2d.org/). 



It was tested with LDtk v0.9.3



## Installation and Usage

Place `ldtk.lua` anywhere in the project and make sure you have `json.lua` in the same folder.


`json.lua` is needed because LDtk relies on json.



You can put your tilesets and .ldtk files freely anywhere relative to `main.lua`.


I recommend turning on "Minify JSON" and "Save levels to separate files" in project settings to save space and increase loading speed.



```lua

-- Require the library

local ldtk = require 'path/to/ldtk.lua'



-- Load the .ldtk file

ldtk:load('path/to/file.ldtk')



-- Override the callbacks with your game logic.

function ldtk.onEntity(entity)

    -- A new entity is created.

end



function ldtk.onLayer(layer)

    -- A new layer is created.

    --[[ 

        The "layer" object has a draw function to draw the whole layer.

        Used like:

            layer:draw()

    ]]

end



function ldtk.onLevelLoaded(level)

    -- Current level is about to be changed.

end



function ldtk.onLevelCreated(level)

    -- Current level has changed.

end



-- Flip the loading order if needed.

ldtk:setFlipped(true) --false by default



-- Load a level

ldtk:goTo(2)        --loads the second level

ldtk:level('cat')   --loads the level named cat

ldtk:next()         --loads the next level (or the first if we are in the last)

ldtk:previous()     --loads the previous level (or the last if we are in the first)

ldtk:reload()       --reloads the current level

```



Check `main.lua` for a detailed example on how to use this library.



## API

### Callbacks



callbacks gives you the extracted data from LDtk project file in order.



| name | description | arguments |

| -- | -- | -- |

| onEntity | called when a new entity is created | entity object |

| onLayer | called when a new layer object is created | layer object |

| onLevelLoaded | called just before any other callback when a new level is about to be created | levelData object |

| onLevelCreated | called just after all other callbacks when a new level is created | levelData object |



### objects



| property | description | type |

| -- | -- | -- |

| entity |  |  |

| x | x position | integer |

| y | y position | integer |

| id | the entity name | string |

| width | the width of the entity in pixels | integer |

| height | the height of the entity in pixels | integer |

| visible | whether the entity is visible or not | boolean |

| px | the x pivot of the entity | integer |

| py | the y pivot of the entity | integer |

| order | the order of the entity layer. | integer |

| props | a table containing all custom properties defined in LDtk | table |



| property | description | type |

| -- | -- | -- |

| layer |  |  |

| x | x position | integer |

| y | y position | integer |

| width | width in tiles | integer |

| height | height in tiles | integer |

| gridSize | size in pixels of each tile | integer |

| tiles | array of [tile instances](https://ldtk.io/json/#ldtk-Tile) | table |

| intGrid | integer array of grid values. nil if layer is not an IntGrid. | table \| nil |

| id | the layer name | string |

| visible | whether the layer is visible or not | boolean |

| order | the order of the entity layer.| integer |

| color | The color of the layer. usually used for opacity.  default: {1, 1, 1, 1} (white) | table |

| draw | draws the current layer | function |



| property | description | type |

| -- | -- | -- |

| levelData |  |  |

| backgroundColor | the background color. {r, g, b} like {0.47, 0.14, 0.83} | table |

| id | the name of the level | string |

| worldX | the level x in the world | integer |

| worldY | the level y in the world | integer |

| width | the width of the level | integer |

| height | the height of the level | integer |

| neighbours | a table containing all nearby levels (ie. levels that touch the current one)

| props | a table containing all custom properties defined in LDtk | table |



### Functions



#### ldtk:load

loads the .ldtk project file.

```lua

ldtk:load('path/to/file.ldtk')

```

returns nothing



#### ldtk:goTo

loads a level by its index starting at 1 as the first level

```lua

ldtk:goTo(3) --loads the third level

```

returns nothing



#### ldtk:level

loads a level by its id (name)

```lua

ldtk:level('menu') --loads the level named menu

```

returns nothing



#### ldtk:next

loads the next level or the first if we are in the last

```lua

ldtk:next() --loads the next level

```

returns nothing



#### ldtk:previous

loads the next level or the last if we are in the first

```lua

ldtk:previous() --loads the previous level

```

returns nothing



#### ldtk:reload

reloads current level

```lua

ldtk:reload() --reloads current level

```

returns nothing



#### ldtk:getCurrent

gets current level index. can be accesed as ldtk.current

```lua

ldtk:getCurrent() --gets current level index

```

returns integer



#### ldtk:getCurrentName

gets current level name.

```lua

ldtk:getCurrentName() --gets current level name

```

returns string



#### ldtk.getIndex

gets a level index by its name

```lua

ldtk.getIndex('menu') --gets the index of the level named menu

```

returns integer



#### ldtk.getName

gets a level name by its index

```lua

ldtk.getName(3) --gets the name of the third level

```

returns string



#### ldtk.removeCache

removes the cached images and quads. you may use it before loading another .ldtk file

```lua

ldtk.removeCache() --remove the cached images and quads

```

returns nothing



#### ldtk.getColorHex

gets an RGB color (on a scale of 0 to 1) from a HEX color

```lua

ldtk.getColorHex('#316f1b') --gets the rgb color of #316f1b

```

returns table (r, g, b) like (0.2, 1, 0.49)



#### ldtk.getPath

makes the path relative to main.lua instead of the .ldtk file

```lua

ldtk.getPath('../tilesets/tiles.png') --gets the the relative path to main.lua

```

returns string



#### ldtk.setFlipped

whether to flip the order or not. false by default and can be accessed like ldtk.flipped

```lua

ldtk.setFlipped(true) -- flips the order and the top layer will be created last

```

returns nothing



#### ldtk.getFlipped

gets whether the order is flipped or not. same as ldtk.flipped

```lua

ldtk.getFlipped() -- is the order flipped ?

```

returns boolean



## License

[MIT](https://choosealicense.com/licenses/mit/)



Have Fun!