questions about “How to make a 3D platformer in Godot in 8 minutes” tutorial at Youtube: Page 2

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questions about “How to make a 3D platformer in Godot in 8 minutes” tutorial at Youtube

nitrofurano

when adding var label1=get_node("Label1") i get Parser Error: Use "onready var label1 = get_node(...)" instead.

when adding onready var label1=get_node("Label1") i get Invalid set index 'text' (on base: 'null instance') with value of type 'String'.

and in whatever case, should we really use var label1=get_node("Label1") instead of var label1=get_node("World/labels/Label1") ? (let's suppose we have lots of nodes with similar name)

cybereality

You have to use the relative path from where the script is to where the node is. That error means that "Label1" is not a child node of the node the script is on. I don't know what the hierarchy of your scene looks like, but if you read the link I gave, it should give you an idea of how to navigate the paths.

For example, if "Label" is one level up (a sibling of the script node), you can do:

var label = get_node("../Label");

Or if it is two levels down you would use:

var label = get_node("SubNode/Label")

If the label is under the root node of the scene, you can do:

var label = get_tree().get_root().get_node("Label")

nitrofurano

just a question: only relative? can't we use absolute path as well somehow?

cybereality

Yeah, you can use absolute paths if you start with "/root/". For example:

get_node("/root/Level/Label")

nitrofurano

working now: https://drive.google.com/file/d/1WFvxImhk47Be0y-jbyvP1XjENANcNz-r/view

nitrofurano

and another question: how can we, using gdscript, change albedo from models and environment clear color, and stuff like that ?

cybereality

You can change albedo by updating the material on the model.

For example, for a script on a mesh:

var mat = get_surface_material(0)

The "get_suface_material" function needs to be called on a MeshInstance. If the script is not on the mesh, you will need to use the "get_node" function to find the node path, e.g.:

var mat = get_node("MyLevel/MyMesh").get_surface_material(0)

Then use this to change the color:

mat.albedo_color = Color(randf(), randf(), randf())

This sets a random color. If you want a specific color, just create a new Color with the red/green/blue values you want (between 0.0 and 1.0). This would be pure green:

Color(0.0, 1.0, 0.0)

You can do this for an environment as well, just create a custom world environment and and an environment with a background mode of custom color.

var env = get_node("Env")
env.environment.background_color = Color(randf(), randf(), randf())

Hope that helps.

nitrofurano

well, i guess we can also use "mat.albedo_color = 0x00FF00" instead of "mat.albedo_color = Color(0.0, 1.0, 0.0)"? (i think i used it often on Python-Pygame and sdlBasic, in similar situations, in an sdl library context) - this also makes me curious about how can we use colours from different colourspaces, like hsv, hsl, cie-lab, yuv, yjk, etc., palettes (as array of colours) like focoltone, pantone, ral, toyo, x11, etc., duotone, tritone, calculations over colours, etc.

nitrofurano

about the code lines you mentioned above, they are still not working, getting errors like "Attempt to call function 'get_surface_material' in base 'null instance' on a null instance" - i have them as commented lines in https://drive.google.com/file/d/1siVWjOp9LyXk0sVn8b6qXa_xURJtWmBU/view?usp=sharing

cybereality

That means your path to the node is not correct. Or, if you are calling them at the top of the script, you have to use "onready" to make sure the scene is all loaded first.

This won't work unless the node the script is on is a mesh (in your case it's kinematic body)

var material1=get_surface_material(0)

This won't work because the scene is not fully loaded yet.

var material2=get_node("/root/World/plataformas/plataformas01/base").get_surface_material(0)

This might work, assuming the path is correct and that "base" is a mesh.

onready var material2=get_node("/root/World/plataformas/plataformas01/base").get_surface_material(0)

nitrofurano

interesting how we use hexcolours there - material2.albedo_color=0x664422FF seems to change the colour to #CC8844

or i guess we can use hexcolours this way: material2.albedo_color=0xFF|128*0xCC8844 (tested now, seems to work fine...)

nitrofurano

but envinronment1.environment.background_color=Color(randf(),randf(),randf()) shows the error Invalid get index 'environment' (on base: 'null instance').

do you know what might be wrong there?

cybereality

That error is telling you that the base object "envinronment1" is a "null instance". That means when you set that variable with "get_node" you either used the wrong path, or called it before the object it was ready, or maybe you never set the variable at all.

nitrofurano

so, how onready var envinronment1= would look like? (i have no idea which node is that... - what i used was from ProjectSettings:Rendering:Environment:DefaultClearColor - should we use something else instead, or is there some way to change the colour there ? - i imagine that whatever value used on Godot is easily accessible from gdscript? ) - https://drive.google.com/file/d/16UM3dkflT52RtESFKdIPkdpHOYMybn0H/view - seems that the documentation related to this is at https://docs.godotengine.org/en/3.1/classes/class_environment.html#class-environment , but i have no idea what to use

nitrofurano

is it related to WorldEnvironment node type in the node hierarchy? if it is, i guess i can't also figure out how to work with it... https://drive.google.com/file/d/1SYYm4-wXPk6jiZeGexf9DEqetL83mJGS/view?usp=sharing (btw. i'm using "prefabs" a bit more (objects linked as scenes, trying to translate unity to godot terminology) in this version )

cybereality

So your code was almost working, you just needed to save out the environment and set it on the camera.

So at the top of your player script, you can do this:

onready var envinronment1=get_node("/root/World").get_environment()

At the bottom, this would work:

envinronment1.background_color=Color(.3+randf()*.3,.3+randf()*.3,.3+randf()*.3)

Then in the editor, click on World. In the Environment on the Inspector, click the drop-down and choose New Environment. Set mode to Custom Color and select a color. We will change this later, but set it to something different so you can see it working in the editor. Then click the Environment drop-down again and choose Save. Type a name for the Environment. Then go to your Camera. In the Environment in the Inspector, click the drop-down and select Load, then select the Environment we saved earlier. That should work.

nitrofurano

it works! thanks! :) - https://drive.google.com/file/d/19IunYbuqJrMnv4PnbZMz5UWPXFZc7Nhc/view?usp=sharing

cybereality

Awesome! So glad I could help.

nitrofurano

btw, in the hud part (labels, colorrects, etc.), it seems to work fine in 1920x1080, but only appear a part of it (upper left) in 960x540, perhaps also in 1280x720, 1024x576, etc., and perhaps would look weird in 2560x1440 and etc. - is there some efficient and simple way to have it always fitting? and how would it work in displays with other ratios, like 1280x1024, 1280x800, 1280x960, etc.? (i have a special curiousity on this because it's also terrible to do on Unity, perhaps on all other game engines as well)

cybereality

Yeah, you can definitely do that in Godot and it is easier than other software. You can use containers and/or anchors, and then your UI will be responsive to any resolution/aspect ratio. https://docs.godotengine.org/en/3.1/tutorials/gui/gui_containers.html https://docs.godotengine.org/en/3.1/tutorials/gui/size_and_anchors.html

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