45 lines
1.7 KiB
GDScript
45 lines
1.7 KiB
GDScript
class_name SiteTerrainData
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extends Resource
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const SonarMaterial = preload("res://game/domain/sonar/sonar_material.gd")
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## Regular single-surface heightfield. Column grows with world +X (east),
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## row grows with world +Z (south). Elevations are world Y in metres.
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@export var columns: int = 0
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@export var rows: int = 0
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@export var cell_size_m: float = 1.0
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@export var origin_x_m: float = 0.0
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@export var origin_z_m: float = 0.0
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@export var elevations_m := PackedFloat32Array()
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@export var materials := PackedByteArray()
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@export var rock_reflectivity: float = 0.72
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@export var sand_reflectivity: float = 0.45
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func index_of(column: int, row: int) -> int:
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return row * columns + column
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func validation_error() -> String:
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if columns < 2 or rows < 2:
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return "terrain needs at least 2 columns and 2 rows"
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if not is_finite(cell_size_m) or cell_size_m <= 0.0:
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return "terrain cell size must be positive"
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if not is_finite(origin_x_m) or not is_finite(origin_z_m):
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return "terrain origin must be finite"
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var cell_count := columns * rows
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if elevations_m.size() != cell_count:
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return "terrain elevation count does not match the grid"
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if materials.size() != cell_count:
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return "terrain material count does not match the grid"
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for elevation: float in elevations_m:
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if not is_finite(elevation):
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return "terrain elevations must be finite"
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for material: int in materials:
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if not SonarMaterial.is_terrain(material):
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return "terrain materials must be rock or sand"
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for reflectivity: float in [rock_reflectivity, sand_reflectivity]:
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if not is_finite(reflectivity) or reflectivity <= 0.0 or reflectivity > 1.0:
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return "terrain reflectivity must be within ]0, 1]"
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return ""
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