class Mittsu::Box2
Attributes
max[RW]
min[RW]
Public Class Methods
new(min = nil, max = nil)
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# File lib/mittsu/math/box2.rb, line 5 def initialize(min = nil, max = nil) @min = min || Mittsu::Vector2.new(Float::INFINITY, Float::INFINITY) @max = max || Mittsu::Vector2.new(-Float::INFINITY, -Float::INFINITY) end
Public Instance Methods
==(box)
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# File lib/mittsu/math/box2.rb, line 124 def ==(box) box.min == @min && box.max == @max end
center(target = Mittsu::Vector2.new)
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# File lib/mittsu/math/box2.rb, line 48 def center(target = Mittsu::Vector2.new) target.add_vectors(@min, @max).multiply_scalar(0.5) end
clamp_point(point, target = nil)
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# File lib/mittsu/math/box2.rb, line 96 def clamp_point(point, target = nil) result = target || Mittsu::Vector2.new result.copy(point).clamp(@min, @max) end
clone()
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# File lib/mittsu/math/box2.rb, line 128 def clone Mittsu::Box2.new.copy(self) end
contains_box?(box)
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# File lib/mittsu/math/box2.rb, line 78 def contains_box?(box) ((@min.x <= box.min.x) && (box.max.x <= @max.x) && (@min.y <= box.min.y) && (box.max.y <= @max.y)) end
contains_point?(point)
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# File lib/mittsu/math/box2.rb, line 74 def contains_point?(point) !(point.x < @min.x || point.x > @max.x || point.y < @min.y || point.y > @max.y) end
copy(box)
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# File lib/mittsu/math/box2.rb, line 31 def copy(box) @min.copy(box.min) @max.copy(box.max) self end
distance_to_point(point)
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# File lib/mittsu/math/box2.rb, line 101 def distance_to_point(point) clampedPoint = point.clone.clamp(@min, @max) clampedPoint.sub(point).length end
empty?()
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# File lib/mittsu/math/box2.rb, line 43 def empty? # this is a more robust check for empty than (volume <= 0) because volume can get positive with two negative axes (@max.x < @min.x) || (@max.y < @min.y) end
expand_by_point(point)
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# File lib/mittsu/math/box2.rb, line 56 def expand_by_point(point) @min.min(point) @max.max(point) self end
expand_by_scalar(scalar)
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# File lib/mittsu/math/box2.rb, line 68 def expand_by_scalar(scalar) @min.add_scalar(-scalar) @max.add_scalar(scalar) self end
expand_by_vector(vector)
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# File lib/mittsu/math/box2.rb, line 62 def expand_by_vector(vector) @min.sub(vector) @max.add(vector) self end
intersect(box)
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# File lib/mittsu/math/box2.rb, line 106 def intersect(box) @min.max(box.min) @max.min(box.max) self end
intersection_box?(box)
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# File lib/mittsu/math/box2.rb, line 91 def intersection_box?(box) # using 6 splitting planes to rule out intersections. !(box.max.x < @min.x || box.min.x > @max.x || box.max.y < @min.y || box.min.y > @max.y) end
make_empty()
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# File lib/mittsu/math/box2.rb, line 37 def make_empty @min.x = @min.y = Float::INFINITY @max.x = @max.y = - Float::INFINITY self end
parameter(point, target = Mittsu::Vector2.new)
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# File lib/mittsu/math/box2.rb, line 82 def parameter(point, target = Mittsu::Vector2.new) # This can potentially have a divide by zero if the box # has a size dimension of 0. target.set( (point.x - @min.x) / (@max.x - @min.x), (point.y - @min.y) / (@max.y - @min.y) ) end
set(min, max)
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# File lib/mittsu/math/box2.rb, line 10 def set(min, max) @min.copy(min) @max.copy(max) self end
set_from_center_and_size(center, size)
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# File lib/mittsu/math/box2.rb, line 24 def set_from_center_and_size(center, size) halfSize = size.clone.multiply_scalar(0.5) @min.copy(center).sub(halfSize) @max.copy(center).add(halfSize) self end
set_from_points(points)
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# File lib/mittsu/math/box2.rb, line 16 def set_from_points(points) self.make_empty points.each do |point| self.expand_by_point(point) end self end
size(target = Mittsu::Vector2.new)
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# File lib/mittsu/math/box2.rb, line 52 def size(target = Mittsu::Vector2.new) target.sub_vectors(@max, @min) end
translate(offset)
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# File lib/mittsu/math/box2.rb, line 118 def translate(offset) @min.add(offset) @max.add(offset) self end
union(box)
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# File lib/mittsu/math/box2.rb, line 112 def union(box) @min.min(box.min) @max.max(box.max) self end