69 lines
3.1 KiB
XML
69 lines
3.1 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="bool" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
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<brief_description>
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Boolean built-in type.
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</brief_description>
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<description>
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Boolean is a built-in type. There are two boolean values: [code]true[/code] and [code]false[/code]. You can think of it as a switch with on or off (1 or 0) setting. Booleans are used in programming for logic in condition statements, like [code]if[/code] statements.
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Booleans can be directly used in [code]if[/code] statements. The code below demonstrates this on the [code]if can_shoot:[/code] line. You don't need to use [code]== true[/code], you only need [code]if can_shoot:[/code]. Similarly, use [code]if not can_shoot:[/code] rather than [code]== false[/code].
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[codeblock]
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var can_shoot = true
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func shoot():
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if can_shoot:
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pass # Perform shooting actions here.
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[/codeblock]
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The following code will only create a bullet if both conditions are met: action "shoot" is pressed and if [code]can_shoot[/code] is [code]true[/code].
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[b]Note:[/b] [code]Input.is_action_pressed("shoot")[/code] is also a boolean that is [code]true[/code] when "shoot" is pressed and [code]false[/code] when "shoot" isn't pressed.
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[codeblock]
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var can_shoot = true
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func shoot():
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if can_shoot and Input.is_action_pressed("shoot"):
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create_bullet()
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[/codeblock]
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The following code will set [code]can_shoot[/code] to [code]false[/code] and start a timer. This will prevent player from shooting until the timer runs out. Next [code]can_shoot[/code] will be set to [code]true[/code] again allowing player to shoot once again.
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[codeblock]
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var can_shoot = true
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onready var cool_down = $CoolDownTimer
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func shoot():
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if can_shoot and Input.is_action_pressed("shoot"):
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create_bullet()
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can_shoot = false
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cool_down.start()
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func _on_CoolDownTimer_timeout():
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can_shoot = true
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[/codeblock]
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</description>
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<tutorials>
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</tutorials>
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<methods>
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<method name="bool">
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<return type="bool" />
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<argument index="0" name="from" type="int" />
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<description>
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Cast an [int] value to a boolean value, this method will return [code]false[/code] if [code]0[/code] is passed in, and [code]true[/code] for all other ints.
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</description>
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</method>
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<method name="bool">
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<return type="bool" />
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<argument index="0" name="from" type="float" />
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<description>
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Cast a [float] value to a boolean value, this method will return [code]false[/code] if [code]0.0[/code] is passed in, and [code]true[/code] for all other floats.
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</description>
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</method>
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<method name="bool">
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<return type="bool" />
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<argument index="0" name="from" type="String" />
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<description>
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Cast a [String] value to a boolean value, this method will return [code]false[/code] if [code]""[/code] is passed in, and [code]true[/code] for all non-empty strings.
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Examples: [code]bool("False")[/code] returns [code]true[/code], [code]bool("")[/code] returns [code]false[/code].
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</description>
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</method>
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</methods>
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<constants>
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</constants>
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</class>
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