extends SceneTree
## Render-Probe Boden-Wiederholung (Steppe, 256 m flach, Sandpfad): Top-Down
## 60 m + flache Perspektive. Start (BRAUCHT Rendering):
## godot --path . --rendering-driver opengl3 -s res://tests/probe_steppe_tiling.gd -- <prefix>

func _initialize() -> void:
	_run()


func _run() -> void:
	await process_frame
	await process_frame
	var prefix := OS.get_cmdline_user_args()[0] if OS.get_cmdline_user_args().size() > 0 else "/tmp/steppe"
	var size := 256.0
	var res := 129
	var mres := SvmapIO.material_resolution_for(res, size, size)
	var heights := PackedFloat32Array()
	heights.resize(res * res)
	var mats := PackedByteArray()
	mats.resize(mres * mres)
	var mb := PackedByteArray()
	mb.resize(mres * mres)
	var mw := PackedByteArray()
	mw.resize(mres * mres)
	for i in 60:
		var t := float(i) / 59.0
		TerrainField.apply_material_brush_mix(mats, mb, mw, mres, size, size,
				-25.0 + 50.0 * t, -10.0 + 8.0 * sin(t * 3.0), 3.0, 1, 0.0)
	var view := Node3D.new()
	view.set_script(load("res://core/viewport/terrain_mesh.gd"))
	root.add_child(view)
	view.call("set_mix", mb, mw)
	view.call("update_heights", heights, res, size, size, mats)
	view.call("set_contours", false)
	var cam := Camera3D.new()
	root.add_child(cam)
	cam.projection = Camera3D.PROJECTION_ORTHOGONAL
	cam.size = 60.0
	cam.position = Vector3(0.0, 50.0, 10.01)
	cam.look_at(Vector3(0, 0, 10.0), Vector3(0, 0, -1))
	cam.current = true
	for i in 4:
		await process_frame
	await RenderingServer.frame_post_draw
	root.get_texture().get_image().save_png(prefix + "_top.png")
	cam.projection = Camera3D.PROJECTION_PERSPECTIVE
	cam.fov = 70.0
	cam.position = Vector3(0.0, 6.0, 60.0)
	cam.look_at(Vector3(0, 0, 20.0), Vector3.UP)
	for i in 3:
		await process_frame
	await RenderingServer.frame_post_draw
	root.get_texture().get_image().save_png(prefix + "_persp.png")
	quit(0)