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@@ -4,10 +4,10 @@
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A 2D axis-aligned bounding box using floating-point coordinates.
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A 2D axis-aligned bounding box using floating-point coordinates.
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</brief_description>
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</brief_description>
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<description>
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<description>
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- [Rect2] consists of a position, a size, and several utility functions. It is typically used for fast overlap tests.
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- It uses floating-point coordinates. If you need integer coordinates, use [Rect2i] instead.
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- The 3D counterpart to [Rect2] is [AABB].
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- Negative values for [member size] are not supported and will not work for most methods. Use [method abs] to get a Rect2 with a positive size.
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+ The [Rect2] built-in [Variant] type represents an axis-aligned rectangle in a 2D space. It is defined by its [member position] and [member size], which are [Vector2]. It is frequently used for fast overlap tests (see [method intersects]). Although [Rect2] itself is axis-aligned, it can be combined with [Transform2D] to represent a rotated or skewed rectangle.
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+ For integer coordinates, use [Rect2i]. The 3D equivalent to [Rect2] is [AABB].
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+ [b]Note:[/b] Negative values for [member size] are not supported. With negative size, most [Rect2] methods do not work correctly. Use [method abs] to get an equivalent [Rect2] with a non-negative size.
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+ [b]Note:[/b] In a boolean context, a [Rect2] evaluates to [code]false[/code] if both [member position] and [member size] are zero (equal to [constant Vector2.ZERO]). Otherwise, it always evaluates to [code]true[/code].
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</description>
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</description>
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<tutorials>
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<tutorials>
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<link title="Math documentation index">$DOCS_URL/tutorials/math/index.html</link>
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<link title="Math documentation index">$DOCS_URL/tutorials/math/index.html</link>
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@@ -18,7 +18,7 @@
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<constructor name="Rect2">
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<constructor name="Rect2">
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<return type="Rect2" />
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<return type="Rect2" />
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<description>
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<description>
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- Constructs a default-initialized [Rect2] with default (zero) values of [member position] and [member size].
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+ Constructs a [Rect2] with its [member position] and [member size] set to [constant Vector2.ZERO].
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</description>
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</description>
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</constructor>
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</constructor>
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<constructor name="Rect2">
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<constructor name="Rect2">
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@@ -40,7 +40,7 @@
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<param index="0" name="position" type="Vector2" />
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<param index="0" name="position" type="Vector2" />
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<param index="1" name="size" type="Vector2" />
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<param index="1" name="size" type="Vector2" />
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<description>
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<description>
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- Constructs a [Rect2] by position and size.
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+ Constructs a [Rect2] by [param position] and [param size].
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</description>
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</description>
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</constructor>
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</constructor>
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<constructor name="Rect2">
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<constructor name="Rect2">
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@@ -50,7 +50,7 @@
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<param index="2" name="width" type="float" />
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<param index="2" name="width" type="float" />
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<param index="3" name="height" type="float" />
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<param index="3" name="height" type="float" />
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<description>
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<description>
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- Constructs a [Rect2] by x, y, width, and height.
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+ Constructs a [Rect2] by setting its [member position] to ([param x], [param y]), and its [member size] to ([param width], [param height]).
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</description>
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</description>
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</constructor>
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</constructor>
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</constructors>
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</constructors>
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@@ -58,34 +58,44 @@
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<method name="abs" qualifiers="const">
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<method name="abs" qualifiers="const">
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<return type="Rect2" />
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<return type="Rect2" />
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<description>
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<description>
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- Returns a [Rect2] with equivalent position and area, modified so that the top-left corner is the origin and [code]width[/code] and [code]height[/code] are positive.
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+ Returns a [Rect2] equivalent to this rectangle, with its width and height modified to be non-negative values, and with its [member position] being the top-left corner of the rectangle.
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+ [codeblocks]
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+ [gdscript]
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+ var rect = Rect2(25, 25, -100, -50)
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+ var absolute = rect.abs() # absolute is Rect2(-75, -25, 100, 50)
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+ [/gdscript]
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+ [csharp]
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+ var rect = new Rect2(25, 25, -100, -50);
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+ var absolute = rect.Abs(); // absolute is Rect2(-75, -25, 100, 50)
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+ [/csharp]
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+ [/codeblocks]
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+ [b]Note:[/b] It's recommended to use this method when [member size] is negative, as most other methods in Godot assume that the [member position] is the top-left corner, and the [member end] is the bottom-right corner.
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</description>
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</description>
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</method>
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</method>
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<method name="encloses" qualifiers="const">
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<method name="encloses" qualifiers="const">
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<return type="bool" />
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<return type="bool" />
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<param index="0" name="b" type="Rect2" />
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<param index="0" name="b" type="Rect2" />
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<description>
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<description>
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- Returns [code]true[/code] if this [Rect2] completely encloses another one.
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+ Returns [code]true[/code] if this rectangle [i]completely[/i] encloses the [param b] rectangle.
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</description>
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</description>
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</method>
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</method>
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<method name="expand" qualifiers="const">
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<method name="expand" qualifiers="const">
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<return type="Rect2" />
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<return type="Rect2" />
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<param index="0" name="to" type="Vector2" />
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<param index="0" name="to" type="Vector2" />
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<description>
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<description>
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- Returns a copy of this [Rect2] expanded to include a given point.
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- [b]Example:[/b]
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+ Returns a copy of this rectangle expanded to include the given [param to] point, if necessary.
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[codeblocks]
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[codeblocks]
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[gdscript]
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[gdscript]
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- # position (-3, 2), size (1, 1)
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- var rect = Rect2(Vector2(-3, 2), Vector2(1, 1))
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- # position (-3, -1), size (3, 4), so we fit both rect and Vector2(0, -1)
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- var rect2 = rect.expand(Vector2(0, -1))
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+ var rect = Rect2(0, 0, 5, 2)
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+
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+ rect = rect.expand(Vector2(10, 0)) # rect is Rect2(0, 0, 10, 2)
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+ rect = rect.expand(Vector2(-5, 5)) # rect is Rect2(-5, 0, 10, 5)
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[/gdscript]
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[/gdscript]
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[csharp]
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[csharp]
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- // position (-3, 2), size (1, 1)
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- var rect = new Rect2(new Vector2(-3, 2), new Vector2(1, 1));
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- // position (-3, -1), size (3, 4), so we fit both rect and Vector2(0, -1)
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- var rect2 = rect.Expand(new Vector2(0, -1));
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+ var rect = new Rect2(0, 0, 5, 2);
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+
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+ rect = rect.Expand(new Vector2(10, 0)); // rect is Rect2(0, 0, 10, 2)
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+ rect = rect.Expand(new Vector2(-5, 5)); // rect is Rect2(-5, 0, 10, 5)
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[/csharp]
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[/csharp]
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[/codeblocks]
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[/codeblocks]
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</description>
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</description>
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@@ -93,20 +103,30 @@
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<method name="get_area" qualifiers="const">
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<method name="get_area" qualifiers="const">
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<return type="float" />
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<return type="float" />
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<description>
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<description>
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- Returns the area of the [Rect2]. See also [method has_area].
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+ Returns the rectangle's area. This is equivalent to [code]size.x * size.y[/code]. See also [method has_area].
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</description>
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</description>
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</method>
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</method>
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<method name="get_center" qualifiers="const">
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<method name="get_center" qualifiers="const">
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<return type="Vector2" />
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<return type="Vector2" />
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<description>
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<description>
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- Returns the center of the [Rect2], which is equal to [member position] + ([member size] / 2).
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+ Returns the center point of the rectangle. This is the same as [code]position + (size / 2.0)[/code].
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</description>
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</description>
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</method>
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</method>
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<method name="grow" qualifiers="const">
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<method name="grow" qualifiers="const">
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<return type="Rect2" />
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<return type="Rect2" />
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<param index="0" name="amount" type="float" />
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<param index="0" name="amount" type="float" />
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<description>
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<description>
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- Returns a copy of the [Rect2] grown by the specified [param amount] on all sides.
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+ Returns a copy of this rectangle extended on all sides by the given [param amount]. A negative [param amount] shrinks the rectangle instead. See also [method grow_individual] and [method grow_side].
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+ [codeblocks]
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+ [gdscript]
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+ var a = Rect2(4, 4, 8, 8).grow(4) # a is Rect2(0, 0, 16, 16)
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+ var b = Rect2(0, 0, 8, 4).grow(2) # b is Rect2(-2, -2, 12, 8)
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+ [/gdscript]
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+ [csharp]
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+ var a = new Rect2(4, 4, 8, 8).Grow(4); // a is Rect2(0, 0, 16, 16)
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+ var b = new Rect2(0, 0, 8, 4).Grow(2); // b is Rect2(-2, -2, 12, 8)
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+ [/csharp]
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+ [/codeblocks]
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</description>
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</description>
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</method>
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</method>
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<method name="grow_individual" qualifiers="const">
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<method name="grow_individual" qualifiers="const">
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@@ -116,7 +136,7 @@
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<param index="2" name="right" type="float" />
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<param index="2" name="right" type="float" />
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<param index="3" name="bottom" type="float" />
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<param index="3" name="bottom" type="float" />
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<description>
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<description>
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- Returns a copy of the [Rect2] grown by the specified amount on each side individually.
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+ Returns a copy of this rectangle with its [param left], [param top], [param right], and [param bottom] sides extended by the given amounts. Negative values shrink the sides, instead. See also [method grow] and [method grow_side].
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</description>
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</description>
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</method>
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</method>
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<method name="grow_side" qualifiers="const">
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<method name="grow_side" qualifiers="const">
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@@ -124,29 +144,43 @@
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<param index="0" name="side" type="int" />
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<param index="0" name="side" type="int" />
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<param index="1" name="amount" type="float" />
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<param index="1" name="amount" type="float" />
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<description>
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<description>
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- Returns a copy of the [Rect2] grown by the specified [param amount] on the specified [enum Side].
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+ Returns a copy of this rectangle with its [param side] extended by the given [param amount] (see [enum Side] constants). A negative [param amount] shrinks the rectangle, instead. See also [method grow] and [method grow_individual].
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</description>
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</description>
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</method>
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</method>
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<method name="has_area" qualifiers="const">
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<method name="has_area" qualifiers="const">
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<return type="bool" />
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<return type="bool" />
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<description>
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<description>
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- Returns [code]true[/code] if the [Rect2] has area, and [code]false[/code] if the [Rect2] is linear, empty, or has a negative [member size]. See also [method get_area].
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+ Returns [code]true[/code] if this rectangle has positive width and height. See also [method get_area].
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</description>
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</description>
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</method>
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</method>
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<method name="has_point" qualifiers="const">
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<method name="has_point" qualifiers="const">
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<return type="bool" />
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<return type="bool" />
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<param index="0" name="point" type="Vector2" />
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<param index="0" name="point" type="Vector2" />
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<description>
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<description>
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- Returns [code]true[/code] if the [Rect2] contains a point. By convention, the right and bottom edges of the [Rect2] are considered exclusive, so points on these edges are [b]not[/b] included.
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- [b]Note:[/b] This method is not reliable for [Rect2] with a [i]negative size[/i]. Use [method abs] to get a positive sized equivalent rectangle to check for contained points.
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+ Returns [code]true[/code] if the rectangle contains the given [param point]. By convention, points on the right and bottom edges are [b]not[/b] included.
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+ [b]Note:[/b] This method is not reliable for [Rect2] with a [i]negative[/i] [member size]. Use [method abs] first to get a valid rectangle.
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</description>
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</description>
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</method>
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</method>
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<method name="intersection" qualifiers="const">
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<method name="intersection" qualifiers="const">
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<return type="Rect2" />
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<return type="Rect2" />
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<param index="0" name="b" type="Rect2" />
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<param index="0" name="b" type="Rect2" />
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<description>
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<description>
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- Returns the intersection of this [Rect2] and [param b].
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- If the rectangles do not intersect, an empty [Rect2] is returned.
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+ Returns the intersection between this rectangle and [param b]. If the rectangles do not intersect, returns an empty [Rect2].
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+ [codeblocks]
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+ [gdscript]
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+ var rect1 = Rect2(0, 0, 5, 10)
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+ var rect2 = Rect2(2, 0, 8, 4)
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+
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+ var a = rect1.intersection(rect2) # a is Rect2(2, 0, 3, 4)
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+ [/gdscript]
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+ [csharp]
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+ var rect1 = new Rect2(0, 0, 5, 10);
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+ var rect2 = new Rect2(2, 0, 8, 4);
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+
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+ var a = rect1.Intersection(rect2); // a is Rect2(2, 0, 3, 4)
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+ [/csharp]
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+ [/codeblocks]
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+ [b]Note:[/b] If you only need to know whether two rectangles are overlapping, use [method intersects], instead.
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</description>
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</description>
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</method>
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</method>
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<method name="intersects" qualifiers="const">
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<method name="intersects" qualifiers="const">
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@@ -154,41 +188,40 @@
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<param index="0" name="b" type="Rect2" />
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<param index="0" name="b" type="Rect2" />
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<param index="1" name="include_borders" type="bool" default="false" />
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<param index="1" name="include_borders" type="bool" default="false" />
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<description>
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<description>
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- Returns [code]true[/code] if the [Rect2] overlaps with [param b] (i.e. they have at least one point in common).
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- If [param include_borders] is [code]true[/code], they will also be considered overlapping if their borders touch, even without intersection.
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+ Returns [code]true[/code] if this rectangle overlaps with the [param b] rectangle. The edges of both rectangles are excluded, unless [param include_borders] is [code]true[/code].
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</description>
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</description>
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</method>
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</method>
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<method name="is_equal_approx" qualifiers="const">
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<method name="is_equal_approx" qualifiers="const">
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<return type="bool" />
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<return type="bool" />
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<param index="0" name="rect" type="Rect2" />
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<param index="0" name="rect" type="Rect2" />
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<description>
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<description>
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- Returns [code]true[/code] if this [Rect2] and [param rect] are approximately equal, by calling [code]is_equal_approx[/code] on each component.
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+ Returns [code]true[/code] if this rectangle and [param rect] are approximately equal, by calling [method Vector2.is_equal_approx] on the [member position] and the [member size].
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</description>
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</description>
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</method>
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</method>
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<method name="is_finite" qualifiers="const">
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<method name="is_finite" qualifiers="const">
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<return type="bool" />
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<return type="bool" />
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<description>
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<description>
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- Returns [code]true[/code] if this [Rect2] is finite, by calling [method @GlobalScope.is_finite] on each component.
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+ Returns [code]true[/code] if this rectangle's values are finite, by calling [method Vector2.is_finite] on the [member position] and the [member size].
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</description>
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</description>
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</method>
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</method>
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<method name="merge" qualifiers="const">
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<method name="merge" qualifiers="const">
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<return type="Rect2" />
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<return type="Rect2" />
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<param index="0" name="b" type="Rect2" />
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<param index="0" name="b" type="Rect2" />
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<description>
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<description>
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- Returns a larger [Rect2] that contains this [Rect2] and [param b].
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+ Returns a [Rect2] that encloses both this rectangle and [param b] around the edges. See also [method encloses].
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</description>
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</description>
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</method>
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</method>
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</methods>
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</methods>
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<members>
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<members>
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<member name="end" type="Vector2" setter="" getter="" default="Vector2(0, 0)">
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<member name="end" type="Vector2" setter="" getter="" default="Vector2(0, 0)">
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- Ending corner. This is calculated as [code]position + size[/code]. Setting this value will change the size.
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+ The ending point. This is usually the bottom-right corner of the rectangle, and is equivalent to [code]position + size[/code]. Setting this point affects the [member size].
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</member>
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</member>
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<member name="position" type="Vector2" setter="" getter="" default="Vector2(0, 0)">
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<member name="position" type="Vector2" setter="" getter="" default="Vector2(0, 0)">
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- Beginning corner. Typically has values lower than [member end].
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+ The origin point. This is usually the top-left corner of the rectangle.
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</member>
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</member>
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<member name="size" type="Vector2" setter="" getter="" default="Vector2(0, 0)">
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<member name="size" type="Vector2" setter="" getter="" default="Vector2(0, 0)">
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- Size from [member position] to [member end]. Typically, all components are positive.
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- If the size is negative, you can use [method abs] to fix it.
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+ The rectangle's width and height, starting from [member position]. Setting this value also affects the [member end] point.
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+ [b]Note:[/b] It's recommended setting the width and height to non-negative values, as most methods in Godot assume that the [member position] is the top-left corner, and the [member end] is the bottom-right corner. To get an equivalent rectangle with non-negative size, use [method abs].
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</member>
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</member>
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</members>
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</members>
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<operators>
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<operators>
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@@ -196,7 +229,7 @@
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<return type="bool" />
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<return type="bool" />
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<param index="0" name="right" type="Rect2" />
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<param index="0" name="right" type="Rect2" />
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<description>
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<description>
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- Returns [code]true[/code] if the rectangles are not equal.
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+ Returns [code]true[/code] if the [member position] or [member size] of both rectangles are not equal.
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[b]Note:[/b] Due to floating-point precision errors, consider using [method is_equal_approx] instead, which is more reliable.
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[b]Note:[/b] Due to floating-point precision errors, consider using [method is_equal_approx] instead, which is more reliable.
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</description>
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</description>
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</operator>
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</operator>
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@@ -211,7 +244,7 @@
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<return type="bool" />
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<return type="bool" />
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<param index="0" name="right" type="Rect2" />
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<param index="0" name="right" type="Rect2" />
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<description>
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<description>
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- Returns [code]true[/code] if the rectangles are exactly equal.
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+ Returns [code]true[/code] if both [member position] and [member size] of the rectangles are exactly equal, respectively.
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[b]Note:[/b] Due to floating-point precision errors, consider using [method is_equal_approx] instead, which is more reliable.
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[b]Note:[/b] Due to floating-point precision errors, consider using [method is_equal_approx] instead, which is more reliable.
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</description>
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</description>
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</operator>
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</operator>
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