92 lines
3.3 KiB
GDScript
92 lines
3.3 KiB
GDScript
# MIT License
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#
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# Copyright (c) 2023 Mark McKay
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# https://github.com/blackears/cyclopsLevelBuilder
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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@tool
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extends Resource
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class_name SnapToGridUtil
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#const feet_per_meter:float = 3.28084
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@export var unit_size:float = 1
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@export var use_subdivisions:bool = false
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@export var grid_subdivisions:int = 10
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@export var power_of_two_scale:int = 0 #Scaling 2^n
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#local transform matrix for grid
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@export var grid_transform:Transform3D = Transform3D.IDENTITY:
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get:
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return grid_transform
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set(value):
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grid_transform = value
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grid_transform_inv = grid_transform.affine_inverse()
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var grid_transform_inv:Transform3D = Transform3D.IDENTITY
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func load_from_cache(cache:Dictionary):
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unit_size = cache.get("unit_size", 1)
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use_subdivisions = cache.get("use_subdivisions", false)
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grid_subdivisions = cache.get("grid_subdivisions", 10)
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power_of_two_scale = cache.get("power_of_two_scale", 0)
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#print("load grid_transform before")
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grid_transform = SerialUtil.load_cache_transform_3d(cache.get("grid_transform", ""), Transform3D.IDENTITY)
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#print("load grid_transform after ")
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if is_zero_approx(grid_transform.basis.determinant()):
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#print("replace")
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grid_transform = Transform3D.IDENTITY
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#grid_transform = cache.get("grid_transform", Transform3D.IDENTITY)
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func save_to_cache():
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#print("save SnapToGridUtil")
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return {
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"unit_size": unit_size,
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"use_subdivisions": use_subdivisions,
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"grid_subdivisions": grid_subdivisions,
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"power_of_two_scale": power_of_two_scale,
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"grid_transform": SerialUtil.save_cache_transform_3d(grid_transform),
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}
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#Point is in world space
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func snap_point(point:Vector3)->Vector3:
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var p_local:Vector3 = grid_transform_inv * point
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#print("unit_size %s pow 2 %s" % [unit_size, pow(2, power_of_two_scale)])
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var scale:Vector3 = Vector3.ONE * unit_size * pow(2, power_of_two_scale)
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if use_subdivisions:
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scale /= float(grid_subdivisions)
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p_local = floor(p_local / scale + Vector3(.5, .5, .5)) * scale
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var target_point:Vector3 = grid_transform * p_local
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#print("point %s target_point %s scale %s" % [point, target_point, scale])
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return target_point
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func _to_string():
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return "unit_size %s use_subdiv %s subdiv %s pot %s xform %s" \
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% [unit_size, use_subdivisions, grid_subdivisions, power_of_two_scale, grid_transform]
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