render_test.gd

## Visual test: builds Starter_01 from its .sk recipe, renders it to user://render_test.png.
## Run with:  godot -s res://tests/render_test.gd --path .
extends SceneTree

const OUT_PATH := "user://render_test.png"


func _init() -> void:
	call_deferred("_run")


func _run() -> void:
	var recipe := SKRecipe.load_from_file("res://synty_assets/characters/Starter_01.sk")
	var library := SKPartLibrary.new()
	library.scan()
	var colors := SKColorEngine.new()
	colors.setup()

	var database := SKDatabase.new()
	if database.open() and not recipe.color_rows.is_empty():
		var properties := {}
		for prop in database.get_color_properties():
			properties[int(prop.id)] = prop
		var rows: Array = []
		for row in recipe.color_rows:
			var prop: Dictionary = properties.get(row.property_id, {})
			if not prop.is_empty():
				rows.append({ "property": { "u": int(prop.u), "v": int(prop.v) }, "colors": row.colors })
		colors.apply_rows(rows)
		database.close()

	var builder := SKCharacterBuilder.new(library, colors)
	var character := builder.build(recipe)
	if character == null:
		printerr("RENDER TEST: build failed")
		quit(1)
		return

	root.add_child(character)

	var light := DirectionalLight3D.new()
	light.rotation_degrees = Vector3(-45, 30, 0)
	light.light_energy = 1.2
	root.add_child(light)

	var fill := DirectionalLight3D.new()
	fill.rotation_degrees = Vector3(-20, -120, 0)
	fill.light_energy = 0.5
	root.add_child(fill)

	var environment := WorldEnvironment.new()
	var env := Environment.new()
	env.background_mode = Environment.BG_COLOR
	env.background_color = Color(0.2, 0.22, 0.25)
	env.ambient_light_source = Environment.AMBIENT_SOURCE_COLOR
	env.ambient_light_color = Color(0.7, 0.7, 0.75)
	env.ambient_light_energy = 0.6
	environment.environment = env
	root.add_child(environment)

	var camera := Camera3D.new()
	camera.position = Vector3(0, 1.0, 2.6)
	camera.look_at_from_position(camera.position, Vector3(0, 0.9, 0))
	root.add_child(camera)
	camera.make_current()

	# Let import-frame settle and render a few frames before capturing.
	for i in 10:
		await process_frame

	var image := root.get_viewport().get_texture().get_image()
	image.save_png(OUT_PATH)
	print("RENDER TEST: saved %s (%dx%d)" % [ProjectSettings.globalize_path(OUT_PATH), image.get_width(), image.get_height()])
	quit(0)