add example scripts

samples/bin/library/scenes/sample_07.json

@@ -1,6 +1,9 @@
 {
     "components" : {
-        "scene" : {}
+        "scene" : {},
+        "behaviour" : {
+            "script" : "../scripts/sample_07/sample_07.lua"
+        }
     },
     "children" : [{
         "prototype" : "../prefabs/camera_prefab.json"
@@ -10,20 +13,26 @@
             "actor" : {
                 "translation" : [0,0,0],
                 "scale" : 20
+            },
+            "behaviour" : {
+                "script" : "../scripts/sample_07/gnome.lua"
             }
         }
-    }, {
+    },{
         "prototype" : "../prefabs/label_sdf_prefab.json",
         "components" : {
             "label" : {
-                "text" : "Hello World!",
-                "valign" : "center",
+                "text" : "FPS: ",
+                "halign" : "left",
                 "outline_width" : 0.5,
                 "outline_color" : [0,0,0,255]
             },
             "actor" : {
-                "translation" : [0.5,-180.5,0],
-                "scale" : 2
+                "translation" : [-315,-235,0],
+                "scale" : 1
+            },
+            "behaviour" : {
+                "script" : "../scripts/sample_07/fps_label.lua"
             }
         }
     }]

samples/bin/library/scripts/sample_07/fps_label.lua

@@ -0,0 +1,40 @@
+-- -----------------------------------------------------------------------------
+--
+-- private
+--
+-- -----------------------------------------------------------------------------
+
+---@class fps_label_meta
+---@field last_fps number
+
+---@param meta fps_label_meta
+---@param go gobject
+local function update_label_text(meta, go)
+    local curr_fps = the_engine.frame_rate
+    if meta.last_fps ~= curr_fps then
+        meta.last_fps = curr_fps
+        go.label.text = "FPS: " .. curr_fps
+    end
+end
+
+-- -----------------------------------------------------------------------------
+--
+-- meta
+--
+-- -----------------------------------------------------------------------------
+
+local M = {}
+
+---@param meta fps_label_meta
+---@param go gobject
+function M.on_start(meta, go)
+    meta.last_fps = -1
+end
+
+---@param meta fps_label_meta
+---@param go gobject
+function M.on_update(meta, go)
+    update_label_text(meta, go)
+end
+
+return M

samples/bin/library/scripts/sample_07/gnome.lua

@@ -0,0 +1,49 @@
+-- -----------------------------------------------------------------------------
+--
+-- private
+--
+-- -----------------------------------------------------------------------------
+
+---@class gnome_meta
+---@field life_time number
+
+---@param meta gnome_meta
+---@param go gobject
+local function update_life_time(meta, go)
+    meta.life_time = meta.life_time - the_engine.delta_time
+    if meta.life_time <= 0 then
+        go:destroy()
+    end
+end
+
+---@param meta gnome_meta
+---@param go gobject
+local function update_gnome_rotation(meta, go)
+    go.actor.node.rotation = q4f.make_from_euler_angles(
+        radf.new(),
+        radf.new(the_engine.time),
+        radf.new())
+end
+
+-- -----------------------------------------------------------------------------
+--
+-- meta
+--
+-- -----------------------------------------------------------------------------
+
+local M = {}
+
+---@param meta gnome_meta
+---@param go gobject
+function M.on_start(meta, go)
+    meta.life_time = 5
+end
+
+---@param meta gnome_meta
+---@param go gobject
+function M.on_update(meta, go)
+    update_life_time(meta, go)
+    update_gnome_rotation(meta, go)
+end
+
+return M

samples/bin/library/scripts/sample_07/sample_07.lua

@@ -0,0 +1,22 @@
+local M = {}
+
+---@param go gobject
+function M:on_start(go)
+    the_debug:trace("sample_07: on_start")
+end
+
+---@param go gobject
+function M:on_update(go)
+end
+
+---@param go gobject
+---@param type string
+---@param event any
+function M:on_event(go, type, event)
+end
+
+---@param go gobject
+function M:on_shutdown(go)
+end
+
+return M