Add one HP per second regeneration and Half-Life starfield sky

assets/textures/sky/source_manifest.json

@@ -0,0 +1,8 @@
+{
+  "spacert.tga": "1b5726f5c2f5e27ddfd8b583b6f31b77a7b85c8ae31f11a765e43dd41c1ba141",
+  "spacelf.tga": "18b1408a35244736380a2e98d39fbb02ff76bdb33262bd87f2de6b4c1895d4f3",
+  "spaceup.tga": "c3a548c1bf08859179a2922366c793c29ed322ace6ce5ae75f094fcc39457505",
+  "spacedn.tga": "1f746a42da3bc66c3fc5ab468ecf29a22587cd6413afad9bedf92518067c9b87",
+  "spaceft.tga": "73606c44eaa85615068b2a42c41f2cddef4ff49a27c872052ceff20543374ec2",
+  "spacebk.tga": "09dcf639be7050b87ee172b359c4cd499af66f5978bbb23cf61a3976e2fb4a24"
+}

assets/textures/sky/space_panorama.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bf7v2lohgsvfa"
+path="res://.godot/imported/space_panorama.png-9d641b39004f6127eea8a85f76e8ffe9.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/textures/sky/space_panorama.png"
+dest_files=["res://.godot/imported/space_panorama.png-9d641b39004f6127eea8a85f76e8ffe9.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

docs/HEALTH-SKY.md

@@ -0,0 +1,34 @@
+# Health regeneration and starry sky
+
+- Living players recover exactly one HP per elapsed gameplay second, including combat.
+  Maximum is 100 HP; no healing or resurrection after death. Physics time accumulator
+  handles frame-rate variation; time at full HP does not bank healing.
+- `scripts/main.gd` uses a `PanoramaSkyMaterial` as the environment background.
+  Ambient light remains the existing constant color; sky reflections are disabled.
+- Compared local Half-Life skies `night`, `space`, and several `neb*` sets. `space`
+  was selected for a plain star field (`night` is cloudy; nebulae are colorful).
+- `assets/textures/sky/space_panorama.png`: 2048x1024 equirectangular conversion of
+  the six Valve `space*.tga` faces, not a newly generated texture. The original faces
+  are low resolution, so stars retain their original soft appearance. Source hashes
+  are in `source_manifest.json`; original Steam files are never modified.
+
+Reproduce (Pillow and FFmpeg with v360 required):
+
+```sh
+python3 tools/prepare_sky.py /path/to/Half-Life/valve/gfx/env
+```
+
+Verify with installed Godot 4.7.1:
+
+```sh
+"$G" --headless --path . --script res://tools/test_health_sky.gd
+"$G" --display-driver x11 --rendering-method gl_compatibility --path . \
+  --script res://tools/test_health_sky.gd -- --screenshot
+```
+
+Screenshot: `/tmp/zombie-star-window.png`. Test checks discrete timing, maximum,
+no healing after death, panorama dimensions, and unchanged ambient light. Existing
+music, grenade, wave, death, damage, and touch tests also pass. The existing resource
+leak/in-use warnings at test shutdown remain; they are not fixed by this change.
+
+Sky format reference: https://docs.godotengine.org/en/stable/classes/class_panoramaskymaterial.html

docs/WEB-DEPLOY.md

@@ -1,5 +1,17 @@
 # Web build and compressed deployment
 
+## Health + starry sky release: 31564f79b9f5e299
+
+See `docs/HEALTH-SKY.md`: +1 HP/second while alive, capped at 100; Half-Life
+`space` panorama visible outside windows. PCK 3,938,672 bytes; gzip payload total
+12,395,646 bytes. Previous releases retained; root backup `index-before-health-sky.html`.
+
+Build encountered an import-thread crash (`propagate_notification` off caller thread,
+signal 11). Workaround applied only to generated staging `project.godot`:
+`[editor] import/use_multiple_threads=false`; serial re-import and export succeeded.
+Upstream similar issue: https://github.com/godotengine/godot/issues/96242
+
+
 URL: https://enne2.net/pub/zombie-fps/
 Server: debian@enne2.net (bastion).
 Web root: /home/debian/public_html/zombie-fps/.

scripts/main.gd

@@ -31,8 +31,13 @@ func _ready() -> void:
 	add_child(player)
 	var envnode := WorldEnvironment.new()
 	var env := Environment.new()
-	env.background_mode = Environment.BG_COLOR
-	env.background_color = Color(0.08, 0.12, 0.19)
+	env.background_mode = Environment.BG_SKY
+	var sky_material := PanoramaSkyMaterial.new()
+	sky_material.panorama = load("res://assets/textures/sky/space_panorama.png")
+	env.sky = Sky.new()
+	env.sky.sky_material = sky_material
+	# Solo sfondo: illuminazione e riflessi non dipendono dal cielo scuro.
+	env.reflected_light_source = Environment.REFLECTION_SOURCE_DISABLED
 	env.ambient_light_source = Environment.AMBIENT_SOURCE_COLOR
 	env.ambient_light_color = Color(0.65, 0.73, 0.85)
 	env.ambient_light_energy = 0.65

scripts/player.gd

@@ -3,7 +3,19 @@ var camera: Camera3D
 var damage_pivot: Node3D
 var damage_feedback: CanvasLayer
 const DamageFeedback = preload("res://scripts/damage_feedback.gd")
-var hp := 100.0
+const MAX_HP := 100.0
+var hp := MAX_HP
+var _regen_elapsed := 0.0
+
+## Discreto: +1 HP per secondo di gioco, mai oltre il massimo o dopo morte.
+func _regenerate_health(dt: float) -> void:
+	if hp <= 0 or death_started or hp >= MAX_HP:
+		_regen_elapsed = 0.0
+		return
+	_regen_elapsed += dt
+	while _regen_elapsed >= 1.0:
+		_regen_elapsed -= 1.0
+		hp = minf(MAX_HP, hp + 1.0)
 var ammo := 30
 var cooldown := 0.0
 var grenade_cooldown := 0.0
@@ -127,6 +139,7 @@ func _physics_process(dt: float) -> void:
 		if Input.is_action_just_pressed("reload"):
 			get_tree().reload_current_scene()     # R o pulsante Ricarica a partita finita
 		return
+	_regenerate_health(dt)
 	_handle_actions()
 	# Deadzone esplicita piccola (0.2): con la 0.5 delle azioni la corsa utile del
 	# joystick touch si dimezzerebbe, mentre per tastiera/joypad nulla cambia.

tools/prepare_sky.py

@@ -0,0 +1,30 @@
+"""Convert local Half-Life space sky faces to a Godot panorama (Pillow + ffmpeg)."""
+import argparse
+import hashlib
+import json
+import pathlib
+import subprocess
+import tempfile
+from PIL import Image
+
+parser = argparse.ArgumentParser()
+parser.add_argument('source', type=pathlib.Path, help='Half-Life valve/gfx/env directory')
+args = parser.parse_args()
+out = pathlib.Path(__file__).resolve().parents[1] / 'assets/textures/sky'
+out.mkdir(parents=True, exist_ok=True)
+faces = ['rt', 'lf', 'up', 'dn', 'ft', 'bk']
+images = [Image.open(args.source / f'space{s}.tga').convert('RGB') for s in faces]
+w, h = images[0].size
+assert w == h and all(im.size == (w, h) for im in images)
+strip = Image.new('RGB', (6*w, h))
+for i, im in enumerate(images):
+    strip.paste(im, (i*w, 0))
+with tempfile.TemporaryDirectory() as tmp:
+    src = pathlib.Path(tmp) / 'cube.png'
+    strip.save(src)
+    subprocess.run(['ffmpeg', '-y', '-loglevel', 'error', '-i', str(src),
+                    '-vf', 'v360=input=c6x1:output=e:in_forder=rludfb:w=2048:h=1024',
+                    '-frames:v', '1', str(out / 'space_panorama.png')], check=True)
+manifest = {f'space{s}.tga': hashlib.sha256((args.source / f'space{s}.tga').read_bytes()).hexdigest() for s in faces}
+(out / 'source_manifest.json').write_text(json.dumps(manifest, indent=2) + '\n')
+print(out / 'space_panorama.png')

tools/test_health_sky.gd

@@ -0,0 +1,54 @@
+extends SceneTree
+
+func _initialize() -> void:
+	call_deferred("run_test")
+
+func run_test() -> void:
+	var world = load("res://scenes/main.tscn").instantiate()
+	root.add_child(world)
+	world.set_process(false)
+	var player = world.player
+	player.set_physics_process(false)
+	player.hp = 90.0
+	player._regenerate_health(0.5)
+	assert(player.hp == 90.0)
+	player._regenerate_health(0.5)
+	assert(player.hp == 91.0)
+	player._regenerate_health(3.0)
+	assert(player.hp == 94.0)
+	print("PASS: +1 HP ogni secondo, recupero frame lunghi")
+	player.hp = 99.5
+	player._regenerate_health(5.0)
+	assert(player.hp == 100.0)
+	player._regenerate_health(0.0)
+	player.hp = 90.0
+	player._regenerate_health(0.5)
+	assert(player.hp == 90.0)
+	print("PASS: limite 100 HP, nessun accumulo a vita piena")
+	if "--screenshot" in OS.get_cmdline_user_args():
+		player.position = Vector3(0, 0, -6)
+		player.camera.rotation = Vector3.ZERO
+		await create_timer(0.5).timeout
+		await RenderingServer.frame_post_draw
+		root.get_texture().get_image().save_png("/tmp/zombie-star-window.png")
+	player.hp = 0
+	player._regenerate_health(10.0)
+	assert(player.hp == 0)
+	player.hp = 30
+	player.death_started = true
+	player._regenerate_health(10.0)
+	assert(player.hp == 30)
+	print("PASS: nessuna rigenerazione dopo morte")
+	var environment: Environment
+	for node in world.get_children():
+		if node is WorldEnvironment:
+			environment = node.environment
+	assert(environment.background_mode == Environment.BG_SKY)
+	assert(environment.sky.sky_material is PanoramaSkyMaterial)
+	var texture = environment.sky.sky_material.panorama
+	assert(texture.get_width() == 2048 and texture.get_height() == 1024)
+	assert(environment.ambient_light_source == Environment.AMBIENT_SOURCE_COLOR)
+	print("PASS: panorama stellato caricato, illuminazione stanza preservata")
+	world.queue_free()
+	await process_frame
+	quit()