Rijad Zuzo
79 lines
2.6 KiB
GDScript
79 lines
2.6 KiB
GDScript
extends Node
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const SHADER_INTERACTOR_LIMIT := 8
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const CLEARING_LIMIT := 4
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@export var grass_material: ShaderMaterial
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@export_range(1, SHADER_INTERACTOR_LIMIT, 1) var max_interactors := 8
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@export_range(0.02, 0.5, 0.01) var update_interval := 0.08
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@export var path_clearings: Array[NodePath] = []
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var _elapsed := 0.0
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func _ready() -> void:
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# JajceWorld first isolates its mutable materials in the parent's _ready().
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call_deferred("_configure_path_clearings")
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_refresh_interactors()
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func _configure_path_clearings() -> void:
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if grass_material == null:
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return
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var segments := PackedVector4Array()
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segments.resize(CLEARING_LIMIT)
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var widths := Vector4.ZERO
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var count := 0
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for path in path_clearings.slice(0, CLEARING_LIMIT):
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var strip := get_node_or_null(path) as MeshInstance3D
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if strip == null or not strip.mesh is BoxMesh:
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continue
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var box := strip.mesh as BoxMesh
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var half_length := strip.global_basis.z * box.size.z * 0.5
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var start := strip.global_position - half_length
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var end := strip.global_position + half_length
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segments[count] = Vector4(start.x, start.z, end.x, end.z)
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widths[count] = strip.global_basis.x.length() * box.size.x * 0.5 + 0.12
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count += 1
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grass_material.set_shader_parameter("clearing_count", count)
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grass_material.set_shader_parameter("clearing_segments", segments)
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grass_material.set_shader_parameter("clearing_half_widths", widths)
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func _process(delta: float) -> void:
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_elapsed += delta
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if _elapsed < update_interval:
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return
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_elapsed = 0.0
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_refresh_interactors()
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func _refresh_interactors() -> void:
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if grass_material == null:
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return
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var camera := get_viewport().get_camera_3d()
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var origin := camera.global_position if camera != null else Vector3.ZERO
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var nearest: Array[Node3D] = []
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for value in get_tree().get_nodes_in_group("grass_interactors"):
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var candidate := value as Node3D
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if candidate == null:
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continue
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var insert_at := nearest.size()
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var candidate_distance := origin.distance_squared_to(candidate.global_position)
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for index in nearest.size():
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if candidate_distance < origin.distance_squared_to(nearest[index].global_position):
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insert_at = index
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break
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nearest.insert(insert_at, candidate)
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if nearest.size() > max_interactors:
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nearest.pop_back()
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var positions := PackedVector3Array()
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positions.resize(SHADER_INTERACTOR_LIMIT)
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for index in SHADER_INTERACTOR_LIMIT:
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positions[index] = Vector3(0.0, -1000.0, 0.0)
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for index in nearest.size():
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positions[index] = nearest[index].global_position
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grass_material.set_shader_parameter("interactor_count", nearest.size())
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grass_material.set_shader_parameter("interactor_positions", positions)
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