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Update CharFXTransform: explain "relative index"/"absolute index" (previously identical)

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Confusingly, these two properties had identical descriptions even though they measure different things.

"relative_index" measures character count from the custom effect's bbcode opening tag.
"absolute_index" measures character count from the start of the bbcode text that includes the custom effect.

See the code author's own explanation here: https://github.com/godotengine/godot/pull/23658

NOTE: Doco for CharFXTransform.xml has changed significantly in 4.0, where terminology has changed to "glyph".  Therefore, proposing this change for 3.x branch only.
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belzecue 2021-12-22 14:17:47 +08:00 committed by GitHub
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doc/classes/CharFXTransform.xml
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@ -14,7 +14,7 @@
</methods>
<members>
<member name="absolute_index" type="int" setter="set_absolute_index" getter="get_absolute_index" default="0">
The index of the current character (starting from 0). Setting this property won't affect drawing.
The index of the current character (starting from 0) for the [RichTextLabel]'s BBCode text. Setting this property won't affect drawing.
</member>
<member name="character" type="int" setter="set_character" getter="get_character" default="0">
The Unicode codepoint the character will use. This only affects non-whitespace characters. [method @GDScript.ord] can be useful here. For example, the following will replace all characters with asterisks:
@ -42,7 +42,7 @@
The position offset the character will be drawn with (in pixels).
</member>
<member name="relative_index" type="int" setter="set_relative_index" getter="get_relative_index" default="0">
The index of the current character (starting from 0). Setting this property won't affect drawing.
The index of the current character (starting from 0) for this [RichTextEffect] custom block. Setting this property won't affect drawing.
</member>
<member name="visible" type="bool" setter="set_visibility" getter="is_visible" default="true">
If [code]true[/code], the character will be drawn. If [code]false[/code], the character will be hidden. Characters around hidden characters will reflow to take the space of hidden characters. If this is not desired, set their [member color] to [code]Color(1, 1, 1, 0)[/code] instead.