integrates the Squirrel scripting language into Godot with gdextension c++.
edit your nut-files with the editor of your choice
and type the name of the .nut-file in the godotsquirrel-node in inspector.

godotsquirrel is a new node for godot that inherits from Node.
_ready, _process, _physics_process and _input functions work in squirrel.

programmed with godot 4.5, squirrel 3.2. thx to Alberto Demichelis for squirrel.

second example node3d.nut:

print(string)

node = get_node(nodename) // stores the id

create_node(parentnode.id, nodename) // instatiate and add_child - for example: local lbl = create_node("Label")

instantiate(node/object) // (refCounted objects are hardcoded, add missing refCounted...)
// local mat = instantiate("StandardMaterial3D")

set_property(node.id, property, value)
// for example: set_property(lbl.id, "text", "this is YaGoSl")
// other example with vector2: set_property(id, "scale", { x = 1.5, y = 1.5 })
// or set_property with color (id, "modulate", { r=1, g=0.2, b=0.2 })

set_property_object(object.ptr, property, value
// example: set_property_object(mat, "albedo_color", {r=0.0, g=0.0, b=1.0, a=1.0})

get_property(node.id, property)
// example: local pos = get_property(sprite.id, "position")

get_property_object(object.raw, property)
// example:
// local c = get_property_object(boxmat.raw, "albedo_color")
// if (typeof c == "table") {
// print("r = " + c.rawget("r"))
// print("g = " + c.rawget("g"))
// print("b = " + c.rawget("b"))
// print("a = " + c.rawget("a"))
// } else {
// print("Kein Table, sondern: " + typeof c)
// }

call_method // examples:
// local sprite = call_method(my_node, "get_node", "Sprite2D")
// local parent = call_method(my_node, "get_parent")
// local grandparent = call_method(call_method(my_node, "get_parent"), "get_parent")
// call_method(my_node, "set_visible", false)
// call_method(target_node, "queue_free")
// local tree = call_method(my_node, "get_tree")
// call_method(my_node, "emit_signal", "player_scored", 10)
// if (call_method(my_node, "is_in_group", "enemies")) { print("enemy!") }

load_resource
// example: local tex = load_resource("res://icon.svg")
// and then: set_property(sprite.id, "texture", tex)

randint(range), randfloat(range), srand(seed)
// example: srand(42)
// local rand = randint(100).randomnumber // integernumbers from 0 to 99

// NO _draw-function! instead of gdscript the draw-methods work in _ready and so on, too.
draw_clear()
draw_rect(rect, color, boolfill)
// example:
// local rect = { x = 200.0, y = 250.0, width = 400.0, height = 300.0 }
// local col = { r = 1.0, g = 0.0, b = 0.4, a = 0.7 }
// draw_rect(rect, col, true)
// draw_circle(center, col, radius, [filled], [width])
// filled circle: draw_circle({x=400, y=300}, {r=1, g=0, b=0, a=1}, 50);

// for signals new command connect for example: connect(button_node, "pressed", "on_button_pressed")

// Squirrel Code

parent <- null // global variables
sprite <- null
timepassed <- 0

function _ready() {
    print("hello world from squirrel ready")
    parent <- get_node("GodotSquirrel")
    print("parentid: " + parent.id)
    sprite <- create_node(parent.id, "Sprite2D")
    print("id: " + sprite.id)
    if (sprite == null) {
        print("node not found")
        return
    }
    local tex = load_resource("res://icon.svg")
    set_property(sprite.id, "texture", tex)
    local pos = get_property(sprite.id, "position")
    local new_x = 80
    local new_y = 150
    set_property(sprite.id, "position", { x = new_x, y = new_y })

    local lbl = create_node(parent.id, "Label")
    set_property(lbl.id, "text", "this is YaGoSl - press key or mouse to test input")
    set_property(lbl.id, "position", { x = 20, y = 20 })
    set_property(lbl.id, "scale", { x = 2.5, y = 2.5 })
}

function _process(delta) {
    timepassed <- timepassed + delta
    
    if (!sprite) return
    local pos = get_property(sprite.id, "position")
    local new_x = pos.x + timepassed
    local new_y = pos.y
    if (timepassed > 6) {
        timepassed <- 0
        new_x = 0
    }
    set_property(sprite.id, "position", { x = new_x, y = new_y })
}

function _input(event) {
    //print("event! type: " + event.type);
    
    if (event.type == "key" && event.pressed) {
        print("key: " + event.unicode.tochar());
    }
    
    if (event.type == "mouse" && event.pressed) {
        print("mouseclick: " + event.button + " at " + event.x);
    }
}

copy squirrel version 3.2 to directory src/squirrel-3.2
copy godot-cpp version 4.5 to directory godot-cpp
start scons

• new commands create_node and set_property (see list commands)
• now set_property works also with vector2 (set_property(id, "position", { x = 10, y = 20 }))
• set_property also with vector3, bool, color, dictionary, array
• new command get_proterty equal to set_property
• new command call_method
• _input function for key and mouse-events
• new command load_resource
• new commands set_property_object and instantiate (refCounted objects are hardcoded, add missing refCounted...)
• new commands randint, randfloat, srand and new example node3d.nut in directory examples
• new command draw_circle
• new command get_property_object, function _physics_process
• draw_rect, draw_clear - theres no _draw-function cause the draw-commands work everywhere...
• now the standardlibraries of squirrel should work, for example: local result = math.sqrt(4)
• new command draw_circle, new examples timer.nut, button.nut
• better errormessage with linenumber and error, better cleanup in destructor
• signals work with new command connect, new example buttonsignal.nut