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JerakinJerakin
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load json as resource example (#126)
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‎file/json_load/.gitattributes‎

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# Defold Protocol Buffer Text Files (https://github.com/github/linguist/issues/5091)
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*.animationset linguist-language=JSON5
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*.atlas linguist-language=JSON5
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*.camera linguist-language=JSON5
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*.collection linguist-language=JSON5
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*.collectionfactory linguist-language=JSON5
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*.collectionproxy linguist-language=JSON5
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*.collisionobject linguist-language=JSON5
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*.cubemap linguist-language=JSON5
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*.display_profiles linguist-language=JSON5
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*.factory linguist-language=JSON5
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*.font linguist-language=JSON5
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*.gamepads linguist-language=JSON5
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*.go linguist-language=JSON5
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*.gui linguist-language=JSON5
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*.input_binding linguist-language=JSON5
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*.label linguist-language=JSON5
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*.material linguist-language=JSON5
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*.mesh linguist-language=JSON5
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*.model linguist-language=JSON5
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*.particlefx linguist-language=JSON5
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*.render linguist-language=JSON5
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*.sound linguist-language=JSON5
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*.sprite linguist-language=JSON5
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*.spinemodel linguist-language=JSON5
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*.spinescene linguist-language=JSON5
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*.texture_profiles linguist-language=JSON5
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*.tilemap linguist-language=JSON5
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*.tilesource linguist-language=JSON5
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# Defold JSON Files
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*.buffer linguist-language=JSON
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# Defold GLSL Shaders
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*.fp linguist-language=GLSL
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*.vp linguist-language=GLSL
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# Defold Lua Files
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*.editor_script linguist-language=Lua
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*.render_script linguist-language=Lua
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*.script linguist-language=Lua
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*.gui_script linguist-language=Lua

‎file/json_load/.gitignore‎

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/.editor_settings
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/.internal
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/build
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.externalToolBuilders
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.DS_Store
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Thumbs.db
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.lock-wscript
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*.pyc
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.project
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.cproject
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builtins

‎file/json_load/example.md‎

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---
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tags: file
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title: Load JSON data
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brief: This example shows how to load json data using sys.load_resource().
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author: jerakin
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scripts: json_load.script
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---
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The example will load a json file. This can be useful for something like level data.
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Before we can load a resource we need to tell Defold that we have custom resources.
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We do this by changing the "custom resources" entry within our game.project file.
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![set-custom-resource](set_custom_resource.png)

‎file/json_load/example/json_load.collection‎

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name: "main"
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scale_along_z: 0
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embedded_instances {
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id: "go"
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data: "components {\n"
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" id: \"json_load\"\n"
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" component: \"/example/json_load.script\"\n"
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"}\n"
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"embedded_components {\n"
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" id: \"title\"\n"
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" type: \"label\"\n"
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" data: \"size {\\n"
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" x: 128.0\\n"
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" y: 32.0\\n"
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"}\\n"
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"text: \\\"No level loaded\\\"\\n"
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"font: \\\"/builtins/fonts/default.font\\\"\\n"
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"material: \\\"/builtins/fonts/label-df.material\\\"\\n"
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"\"\n"
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" position {\n"
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" x: 360.0\n"
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" y: 360.0\n"
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" }\n"
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"}\n"
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"embedded_components {\n"
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" id: \"Description\"\n"
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" type: \"label\"\n"
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" data: \"size {\\n"
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" x: 128.0\\n"
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" y: 32.0\\n"
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"}\\n"
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"text: \\\"Press \\\\\\\"1\\\\\\\" to load level_001 and \\\\\\\"2\\\\\\\" to to load level_002.\\\"\\n"
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"font: \\\"/builtins/fonts/default.font\\\"\\n"
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"material: \\\"/builtins/fonts/label-df.material\\\"\\n"
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"\"\n"
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" position {\n"
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" x: 360.0\n"
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" y: 50.0\n"
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" }\n"
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"}\n"
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""
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}

‎file/json_load/example/json_load.script‎

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local function load_level(level_name)
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local level_path = "/levels/" .. level_name .. ".json" -- <1>
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local data = sys.load_resource(level_path) -- <2>
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local json_data = json.decode(data) -- <3>
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label.set_text("#title", json_data.title) -- <4>
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end
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function init(self)
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msg.post(".", "acquire_input_focus")
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end
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function on_input(self, action_id, action)
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if action_id == hash("key_1") then
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if action.released then
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load_level("level_001")
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end
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elseif action_id == hash("key_2") then
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if action.released then
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load_level("level_002")
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end
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end
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end
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--[[
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1. Convinience sake we only want pass in the name of the level, but to load the resource we need to give it the full path.
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2. Load the resource, this will return a string.
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3. Use the json.decode to make our string into a lua table.
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4. Use the loaded level data in whatever way we want.
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--]]

‎file/json_load/game.project‎

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[bootstrap]
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main_collection = /example/json_load.collectionc
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[script]
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shared_state = 1
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[display]
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width = 720
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height = 720
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high_dpi = 1
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[android]
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input_method = HiddenInputField
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[html5]
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scale_mode = stretch
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[project]
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title = json_load
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custom_resources = levels
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‎file/json_load/input/game.input_binding‎

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key_trigger {
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input: KEY_1
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action: "key_1"
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}
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key_trigger {
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input: KEY_2
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action: "key_2"
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}

‎file/json_load/levels/level_001.json‎

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{
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"title": "Starting Area"
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}

‎file/json_load/levels/level_002.json‎

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{
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"title": "Mystic Glades"
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}

‎file/json_load/set_custom_resource.png‎

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