148 lines
4.3 KiB
GDScript
148 lines
4.3 KiB
GDScript
extends Sprite2D
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@onready var tile_group = get_tree().get_first_node_in_group("Tile_Group")
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var mask_viewport: SubViewport
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var mask_texture: ViewportTexture
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var is_queued_for_update := false
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var camera: Camera2D
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var last_camera_position := Vector2.ZERO
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var last_camera_offset := Vector2.ZERO # 新增：跟踪相机偏移量
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class MaskRenderer extends Node2D:
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var is_queued_for_update := false
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func _draw():
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var tile_group = get_tree().get_first_node_in_group("Tile_Group")
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if not tile_group or tile_group.tilemaplayers.is_empty():
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return
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var reference_layer = tile_group.tilemaplayers[0]
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for info in tile_group.mask_tile_info:
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var base_pos = reference_layer.map_to_local(info.position)
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for shape in info.shapes:
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match shape.type:
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"polygon":
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var transformed_points = PackedVector2Array()
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for point in shape.points:
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transformed_points.append(base_pos + point)
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draw_colored_polygon(transformed_points, Color.WHITE)
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"rect":
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var pos = base_pos - shape.size/2
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var rect = Rect2(pos, shape.size)
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draw_rect(rect, Color.WHITE, true)
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func queue_update():
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if not is_queued_for_update:
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is_queued_for_update = true
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RenderingServer.frame_post_draw.connect(_on_frame_post_draw, CONNECT_ONE_SHOT)
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func _on_frame_post_draw():
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is_queued_for_update = false
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queue_redraw()
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func _ready():
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# 设置 SubViewport
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_setup_viewport()
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# 设置着色器
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_setup_shader()
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# 订阅信号
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tile_group.mask_tiles_updated.connect(_on_mask_tiles_updated)
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# 寻找并跟踪相机
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_find_and_track_camera()
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await RenderingServer.frame_post_draw
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_update_viewport_for_camera()
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material.set_shader_parameter("mask_texture", mask_viewport.get_texture())
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func _setup_viewport():
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mask_viewport = SubViewport.new()
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mask_viewport.transparent_bg = true
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mask_viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
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add_child(mask_viewport)
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var mask_renderer = MaskRenderer.new()
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mask_viewport.add_child(mask_renderer)
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func _setup_shader():
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var shader_material = ShaderMaterial.new()
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shader_material.shader = preload("res://Char/Char_Components/Blood/blood_mask.gdshader")
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material = shader_material
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func _find_and_track_camera():
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# 寻找场景中的相机
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var level = get_tree().get_first_node_in_group("Level")
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if level:
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camera = level.get_node_or_null("Player/Camera2D")
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if camera:
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last_camera_position = camera.get_screen_center_position()
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func _process(_delta):
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if not camera:
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return
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var current_pos = camera.get_screen_center_position()
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var current_offset = camera.offset
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# 检查相机位置或偏移量是否发生变化
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if current_pos != last_camera_position or current_offset != last_camera_offset:
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last_camera_position = current_pos
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last_camera_offset = current_offset
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_update_viewport_for_camera()
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func _update_viewport_for_camera():
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if not camera:
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return
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# 获取相机的视口大小和缩放
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var viewport_rect = get_viewport_rect()
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var zoom = camera.zoom
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var screen_size = viewport_rect.size
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# 计算实际需要的视口大小（考虑缩放）
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var actual_size = screen_size / zoom
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# 更新 SubViewport 大小
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mask_viewport.size = actual_size
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# 获取相机的全局位置和偏移量
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var camera_global_pos = camera.get_screen_center_position()
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var camera_offset = camera.offset
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# 计算实际的相机中心位置（考虑偏移量）
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var effective_camera_center = camera_global_pos + camera_offset * zoom
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# 计算视口的左上角位置
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var top_left = effective_camera_center - (actual_size / 2)
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# 更新 MaskRenderer 的位置以对齐相机
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if mask_viewport.get_child(0) is MaskRenderer:
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var mask_renderer = mask_viewport.get_child(0)
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mask_renderer.position = -top_left
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# 触发一次更新
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_update_mask()
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func _update_mask():
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if mask_viewport and mask_viewport.get_child(0) is MaskRenderer:
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var mask_renderer = mask_viewport.get_child(0) as MaskRenderer
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mask_renderer.queue_update()
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func _on_mask_tiles_updated():
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if not is_queued_for_update:
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is_queued_for_update = true
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RenderingServer.frame_post_draw.connect(_update_mask_deferred, CONNECT_ONE_SHOT)
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func _update_mask_deferred():
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is_queued_for_update = false
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_update_mask()
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func cleanup():
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if tile_group and tile_group.mask_tiles_updated.is_connected(_on_mask_tiles_updated):
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tile_group.mask_tiles_updated.disconnect(_on_mask_tiles_updated)
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func _exit_tree():
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cleanup()
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