合并多个精灵节点？

例如，假设我有 2 个精灵节点（但也可以超过 2 个），如下所示：

每个人都有自己独立的图像
我想要的是将它们组合起来并用单个图像创建一个新的精灵节点（在工具模式下）

like this:

也许可以通过使用Image？ （毫无疑问涉及计算）
或者也许使用一些东西VisualServer?

我找到了一个解决方案，

tool
extends Sprite

export (Vector2) var img_size setget set_img_size
export (String) var img_path = "res://MergeImg.png"
export (bool) var generate_img = false setget set_generate_img

var ep_filesystem=EditorPlugin.new().get_editor_interface().get_resource_filesystem()

func set_img_size(new_val):
    img_size=new_val
    update()

func _draw():
    draw_rect(Rect2(0,0,img_size.x,img_size.y), Color(0,200,0), false, 1.0)

func set_generate_img(new_val):
    if(not new_val):
        return
    
    var screenshot_viewport=Viewport.new()
    screenshot_viewport.size=img_size
    screenshot_viewport.hdr=false
    screenshot_viewport.transparent_bg=true
    screenshot_viewport.render_target_v_flip=true
    
    for child in get_children():
        remove_child(child)
        screenshot_viewport.add_child(child)
    
    add_child(screenshot_viewport)
    
    screenshot_viewport.set_update_mode(Viewport.UPDATE_ONCE)
    yield(VisualServer,"frame_post_draw")
    
    var mergeImg=screenshot_viewport.get_texture().get_data()
    mergeImg.save_png(img_path)
    
    for child in screenshot_viewport.get_children():
        screenshot_viewport.remove_child(child)
        add_child(child)
        child.set_owner(get_tree().get_edited_scene_root())
    screenshot_viewport.queue_free()
    
    ep_filesystem.scan()
    yield(ep_filesystem,"filesystem_changed")
    
    texture=load(img_path)
    centered=false
    region_enabled=true
    region_rect=Rect2(0,0,img_size.x,img_size.y)
    
    print("Merged Images!")

func _init():
    self_modulate=Color("#74646464")

once you press generate_img it creates an image like this:

我添加的原因self_modulate=Color("#74646464")这样合并后的图像和子精灵之间就不会混淆（就像重影图像一样）

虽然我仍然觉得可能有更好的解决方案，如果有的话请发布一个

Edit:

对于居中偏移

func _draw():
    var origin_x=0
    var origin_y=0
    if(centered):
        origin_x=-img_size.x/2
        origin_y=-img_size.y/2
    print("Redrawing")
    draw_rect(Rect2(origin_x,origin_y,img_size.x,img_size.y), Color(0,200,0), false, 1.0)

func set_generate_img(new_val=true):
    if(not new_val):
        return
    
    var screenshot_viewport=Viewport.new()
    screenshot_viewport.size=img_size
    screenshot_viewport.hdr=false
    screenshot_viewport.transparent_bg=true
    screenshot_viewport.render_target_v_flip=true
    if(centered):
        screenshot_viewport.global_canvas_transform.origin=Vector2(img_size.x/2,img_size.y/2)
    
    for child in get_children():
        remove_child(child)
        screenshot_viewport.add_child(child)
    
    add_child(screenshot_viewport)
    
    screenshot_viewport.set_update_mode(Viewport.UPDATE_ONCE)
    yield(VisualServer,"frame_post_draw")
    
    var mergeImg=screenshot_viewport.get_texture().get_data()
    mergeImg.save_png(img_path)
    
    for child in screenshot_viewport.get_children():
        screenshot_viewport.remove_child(child)
        add_child(child)
        child.set_owner(get_tree().get_edited_scene_root())
    screenshot_viewport.queue_free()
    
    ep_filesystem.scan()
    yield(ep_filesystem,"filesystem_changed")
    
    texture=load(img_path)
    region_enabled=true
    region_rect=Rect2(0,0,img_size.x,img_size.y)

Edit 2:

修复较暗的透明图像，感谢一百万塞拉奥特的回答（点赞吧！）

tool
extends Sprite

export (Vector2) var img_size setget set_img_size
export (String) var img_path = "res://MergeImg.png"
export (bool) var generate_img = false setget set_generate_img

var ep_filesystem=EditorPlugin.new().get_editor_interface().get_resource_filesystem()

func set_img_size(new_val):
    img_size=new_val
    update()

func _draw():
    var origin_x=0
    var origin_y=0
    if(centered):
        origin_x=-img_size.x/2
        origin_y=-img_size.y/2
    print("Redrawing")
    draw_rect(Rect2(origin_x,origin_y,img_size.x,img_size.y), Color(0,200,0), false, 1.0)

func set_generate_img(new_val=true):
    if(not new_val):
        return
    
    var screenshot_viewport=Viewport.new()
    screenshot_viewport.size=img_size
    screenshot_viewport.hdr=false
    screenshot_viewport.transparent_bg=true
    screenshot_viewport.render_target_v_flip=true
    if(centered):
        screenshot_viewport.global_canvas_transform.origin=Vector2(img_size.x/2,img_size.y/2)
    
    for child in get_children():
        remove_child(child)
        screenshot_viewport.add_child(child)
    
    add_child(screenshot_viewport)
    
    screenshot_viewport.set_update_mode(Viewport.UPDATE_ONCE)
    yield(VisualServer,"frame_post_draw")
    
    var mergeImg=screenshot_viewport.get_texture().get_data()
    ### unmultiplication ###
    mergeImg.lock()
    for y in mergeImg.get_size().y:
        for x in mergeImg.get_size().x:
            var color:Color = mergeImg.get_pixel(x, y)
            if color.a != 0:
                mergeImg.set_pixel(x, y, Color(color.r / color.a, color.g / color.a, color.b / color.a, color.a))
    mergeImg.unlock()
    ###
    mergeImg.save_png(img_path)
    
    for child in screenshot_viewport.get_children():
        screenshot_viewport.remove_child(child)
        add_child(child)
        child.set_owner(get_tree().get_edited_scene_root())
    screenshot_viewport.queue_free()
    
    ep_filesystem.scan()
    yield(ep_filesystem,"filesystem_changed")
    
    texture=load(img_path)

func _init():
    self_modulate=Color("#74646464")