jpmschweitzerandClaude Opus 4.6
88c7407cb6
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
86 lines
3.0 KiB
GDScript
86 lines
3.0 KiB
GDScript
extends Node2D
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## Fog overlay controller — manages ColorRect + shader uniforms for D-059 fog.
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## Reads textures from FogState autoload, positions rect to cover viewport.
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## Architecture: docs/architecture/fog-shader-spec.md
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signal fog_noise_ready
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const TILE_SIZE := float(Constants.TILE_SIZE)
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var _noise_ready: bool = false
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var _fog_rect: ColorRect
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var _shader_mat: ShaderMaterial
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func _ready() -> void:
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# Create the fog overlay ColorRect — transparent fallback so a shader failure
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# doesn't paint solid white over the entire world (z:900 covers everything).
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_fog_rect = ColorRect.new()
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_fog_rect.name = "FogRect"
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_fog_rect.color = Color.TRANSPARENT
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add_child(_fog_rect)
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# Load shader and create material
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var shader := load("res://shaders/fog.gdshader") as Shader
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if shader == null:
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push_error("FogShader: failed to load res://shaders/fog.gdshader — fog disabled")
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return
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_shader_mat = ShaderMaterial.new()
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_shader_mat.shader = shader
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_fog_rect.material = _shader_mat
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# Create seamless noise texture for fog animation
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var noise := FastNoiseLite.new()
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noise.seed = 42
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noise.noise_type = FastNoiseLite.TYPE_PERLIN
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noise.frequency = 0.03
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var noise_tex := NoiseTexture2D.new()
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noise_tex.noise = noise
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noise_tex.width = 256
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noise_tex.height = 256
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noise_tex.seamless = true
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noise_tex.changed.connect(
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func():
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_noise_ready = true
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fog_noise_ready.emit()
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)
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_shader_mat.set_shader_parameter("noise_tex", noise_tex)
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_shader_mat.set_shader_parameter("tile_size", TILE_SIZE)
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print("FogShader: Initialized (D-059 3-state)")
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func update_fog() -> void:
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if _shader_mat == null:
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return # Shader failed to load — fog disabled
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# 1. Update FogState textures from GameState
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FogState.update_from_state()
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# 2. Position ColorRect to cover the current viewport.
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# Use the camera's actual position (not player position) so the fog rect
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# tracks the smoothed camera and never desynchronizes during smooth pan.
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var vp_size := get_viewport().get_visible_rect().size
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var cam := get_viewport().get_camera_2d()
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var zoom := cam.zoom if cam else Vector2(2.0, 2.0)
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var camera_pos := cam.global_position if cam else GameState.player_position * TILE_SIZE
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var half_view := vp_size / (2.0 * zoom)
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_fog_rect.position = camera_pos - half_view
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_fog_rect.size = vp_size / zoom
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# 3. Update shader uniforms
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_shader_mat.set_shader_parameter("visibility_tex", FogState.visibility_texture)
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_shader_mat.set_shader_parameter("exploration_tex", FogState.exploration_texture)
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_shader_mat.set_shader_parameter("zone_tint_tex", FogState.zone_tint_texture)
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_shader_mat.set_shader_parameter("rect_pos", _fog_rect.position)
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_shader_mat.set_shader_parameter("rect_sz", _fog_rect.size)
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_shader_mat.set_shader_parameter("map_offset", Vector2(FogState.map_bounds.position))
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_shader_mat.set_shader_parameter("map_size", Vector2(FogState.map_bounds.size))
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var t: float = (
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FogState.override_time if FogState.override_time >= 0.0 else Time.get_ticks_msec() / 1000.0
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)
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_shader_mat.set_shader_parameter("time", t)
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_shader_mat.set_shader_parameter("debug_exploration", FogState.debug_exploration)
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