123 lines
4.6 KiB
GDScript
123 lines
4.6 KiB
GDScript
extends Node2D
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const PLANET_DEFINITIONS = preload("res://PlanetDefinitions.gd")
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# A landable world-object - unlike regular Asteroid.gd, planets are
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# stationary ("Big Stable Asteroid" - stable means it doesn't drift or
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# destroy ships on touch). Whether the fleet counts as "landed" is decided
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# by PlanetField comparing the fleet's CENTROID distance to landing_radius,
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# not per-ship Area2D collision - a single stable number, immune to the
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# constant minor jostling of individual ships holding formation, which
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# used to make the "enter atmosphere" prompt flicker on/off as ships
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# drifted in and out of the boundary independently of each other even
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# while the fleet as a whole was clearly sitting on the planet.
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@export var planet_name: String = ""
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@export var planet_id: String = ""
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@export var definition_id: String = PLANET_DEFINITIONS.DEFAULT_DEFINITION_ID
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@export var landing_radius: float = 140.0
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# Set by whoever spawns this planet (PlanetField, seeded from the chunk's
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# own coordinates) so the outline shape is stable across respawns of the
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# same chunk, instead of reading as a "different" planet every time.
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@export var shape_seed: int = 0
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var definition: Resource
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var visual: Node2D
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var resource_type: String:
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get: return String(definition.resource_id) if definition != null else "ore"
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var surface_profile_id: String:
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get: return String(definition.surface_profile_id) if definition != null else "rocky"
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var shape_points: PackedVector2Array:
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get:
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if visual != null and "shape_points" in visual:
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return visual.shape_points
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return PackedVector2Array()
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var gas_phase: float:
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get:
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if visual != null and "gas_phase" in visual:
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return float(visual.gas_phase)
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return 0.0
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# An extractor is built down on this planet's SURFACE, in a different scene
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# the player is no longer looking at, so from space nothing distinguished a
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# planet already being mined from an untouched one - you had to land to find
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# out. This is a derrick planted on the rim: the same amber the world map
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# uses for its extractor badge, so the two read as the same fact.
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const EXTRACTOR_MARKER_COLOR: Color = Color(1.0, 0.85, 0.3)
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const DERRICK_HEIGHT: float = 44.0
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const DERRICK_HALF_WIDTH: float = 16.0
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# Kept in step with GameState.extractor_added rather than polled per frame.
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# An extractor is built from SPACE (BuildController._planet_under_fleet(),
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# with the fleet parked on the planet), so this node is already in the tree
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# with its _ready() long since run when the answer changes - resolving it
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# only at _ready() left the planet looking untouched until it happened to
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# despawn and respawn.
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var shows_extractor: bool = false
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func _ready() -> void:
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add_to_group("planets")
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z_index = -1
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definition = PLANET_DEFINITIONS.get_definition(definition_id)
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visual = definition.visual_scene.instantiate()
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visual.configure(shape_seed)
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get_node("VisualHost").add_child(visual)
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if planet_id == "":
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planet_id = planet_name
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shows_extractor = GameState.has_extractor_at(planet_id)
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GameState.extractor_added.connect(_on_extractor_added)
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queue_redraw()
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func _on_extractor_added(built_on: String) -> void:
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# Only the planet it was actually built on, and only a redraw when the
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# answer really changed - every other planet in range gets this too.
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if built_on != planet_id or shows_extractor:
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return
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shows_extractor = true
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queue_redraw()
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func extractor_derrick_anchor() -> Vector2:
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if visual != null and visual.has_method("extractor_anchor"):
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return visual.extractor_anchor()
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return Vector2(0.0, -100.0)
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func extractor_derrick_tip() -> Vector2:
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# Exposed separately from the polygon because "does the derrick clear the
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# planet's outline" is a question about the TIP alone. The base corners
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# sit a half-width off to either side, so they are sqrt(|base|^2 + w^2)
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# from the centre and can clear the rim on their own even when the tower
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# points straight into the ground.
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var base: Vector2 = extractor_derrick_anchor()
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var out: Vector2 = base.normalized()
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if out == Vector2.ZERO:
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out = Vector2.UP
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return base + out * DERRICK_HEIGHT
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func extractor_derrick_points() -> PackedVector2Array:
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var base: Vector2 = extractor_derrick_anchor()
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var out: Vector2 = base.normalized()
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if out == Vector2.ZERO:
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out = Vector2.UP
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var side: Vector2 = Vector2(-out.y, out.x)
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var tip: Vector2 = extractor_derrick_tip()
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return PackedVector2Array([
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base - side * DERRICK_HALF_WIDTH,
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tip - side * (DERRICK_HALF_WIDTH * 0.35),
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tip + side * (DERRICK_HALF_WIDTH * 0.35),
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base + side * DERRICK_HALF_WIDTH,
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])
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func _draw() -> void:
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if shows_extractor:
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NeonDraw.draw_glowing_polygon(self, extractor_derrick_points(), EXTRACTOR_MARKER_COLOR, 1.0)
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