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API.md
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@ -31,12 +31,11 @@ These are soft rules, the HUD bars mod will not enforce all of these.
But this mod has been programmed under the assumption that these rules are followed, for integrity. But this mod has been programmed under the assumption that these rules are followed, for integrity.
## Adding a HUD bar ## Adding a HUD bar
To add a HUD bar, you need … To make a new HUD bar known to this mod, you need …
* … an image of size 2×16 for the bar * … an image of size 2×16 for the bar
* … an icon of size 16×16 (optional) * … an icon of size 16×16 (optional)
* … to register it wiith hud. * … to register it with `hud.register_hudbar`
* … to activate it for each player for which you want the HUD
### Bar image ### Bar image
The image for the bar will be repeated horizontally to denote the “value” of the HUD bar. The image for the bar will be repeated horizontally to denote the “value” of the HUD bar.
@ -58,7 +57,7 @@ There is currently no reliable way to force a certain order at which the custom
#### Parameters #### Parameters
* `identifier`: A globally unique internal name for the HUD bar, will be used later to refer to it. Please only rely on alphanumeric characters for now. * `identifier`: A globally unique internal name for the HUD bar, will be used later to refer to it. Please only rely on alphanumeric characters for now.
* `text_color`: A 3-byte number defining the color of the text. The bytes denote, in this order red, green and blue and range from `0x00` (complete lack of this component) to `0xFF` (full intensity of this component). Example: `0xFFFFFF` for white. * `text_color`: A 3-octet number defining the color of the text. The octets denote, in this order red, green and blue and range from `0x00` (complete lack of this component) to `0xFF` (full intensity of this component). Example: `0xFFFFFF` for white.
* `label`: A string which is displayed on the HUD bar itself to describe the HUD bar. Try to keep this string short. * `label`: A string which is displayed on the HUD bar itself to describe the HUD bar. Try to keep this string short.
* `textures`: A table with the following fields: * `textures`: A table with the following fields:
* `bar`: The file name of the bar image (as string). * `bar`: The file name of the bar image (as string).
@ -68,20 +67,19 @@ There is currently no reliable way to force a certain order at which the custom
* `start_hide`: The HUD bar will be initially start hidden when added to a player. Use `hud.unhide_hudbar` to unhide it. * `start_hide`: The HUD bar will be initially start hidden when added to a player. Use `hud.unhide_hudbar` to unhide it.
* `format_string`: This is optional; You can specify an alternative format string display the final text on the HUD bar. The default format string is “`%s: %d/%d`” (in this order: Label, current value, maximum value). See also the Lua documentation of `string.format`. * `format_string`: This is optional; You can specify an alternative format string display the final text on the HUD bar. The default format string is “`%s: %d/%d`” (in this order: Label, current value, maximum value). See also the Lua documentation of `string.format`.
#### Return value #### Return value
Always `nil`. Always `nil`.
## Displaying a HUD bar ## Displaying a HUD bar
After a HUD bar has been registered, they are not yet displayed yet for any player. HUD bars must be After a HUD bar has been registered, they are not yet displayed yet for any player. HUD bars must be
explicitly enabled on a per-player basis. explicitly initialized on a per-player basis.
You probably want to do this in the `minetest.register_on_joinplayer`. You probably want to do this in the `minetest.register_on_joinplayer`.
### `hud.init_hudbar(player, identifier, start_value, start_max)` ### `hud.init_hudbar(player, identifier, start_value, start_max)`
This function initialzed and activates a previously registered HUD bar and assigns it to a This function initialzes and activates a previously registered HUD bar and assigns it to a
certain client. This has only to be done once per player and after that, you can change certain client/player. This has only to be done once per player and after that, you can change
the values using `hud.change_hudbar`. the values using `hud.change_hudbar`.
However, if `start_hide` was set to `true` for the HUD bar (in `hud.register_hudbar`), the HUD bar However, if `start_hide` was set to `true` for the HUD bar (in `hud.register_hudbar`), the HUD bar