Godot Version
Godot Version 4.2
Question
I’m trying to capture images of MeshInstance3D via SubViewport and assigning them as textures to sprites as such:
@tool
extends Node2D
const PIXEL_PER_METER = 100.0
@export var btn := false : set=set_btn
func set_btn(new_val):
if(new_val):
assign_images()
func assign_images():
var sub_viewport=$SubViewport
var camera=$SubViewport/Camera3D
var mesh_instances=[ $SubViewport/A, $SubViewport/B, $SubViewport/C ]
var sprites=[ $A, $B, $C ]
sub_viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
camera.projection = Camera3D.PROJECTION_ORTHOGONAL
for i in len(mesh_instances):
var sprite=sprites[i]
var mesh=mesh_instances[i]
var mesh_aabb=mesh.get_aabb()
camera.size = max(abs(mesh_aabb.size.x), abs(mesh_aabb.size.y))
camera.global_position = Vector3(mesh.global_position.x, mesh.global_position.y, camera.global_position.z)
sprite.position = Vector2(mesh.position.x * PIXEL_PER_METER, mesh.position.y * -PIXEL_PER_METER)
#await get_tree().process_frame # this doesn't work either
sprite.texture=ImageTexture.create_from_image(sub_viewport.get_texture().get_image())
How ever this doesn’t work, it doesn’t capture the right image, nor does it place the sprite at right position relative to it’s mesh counterpart:
For the image capture part, I suspect SubViewport & Camera3D isn’t being updated quickly enough hence it captures the wrong image.
As for the position part, I believe 1 m in 3D translates to 100 pixels in 2D, maybe due to the unit differences the size & position of image is wrong.
So how do I implement this properly?
