Global Command: registerHookFunction
From The Official Visionaire Studio: Adventure Game Engine Wiki
(Redirected from RegisterHookFunction)
Register a hook function for a specific operation.
Syntax
registerHookFunction(operation, hookFunction)
Parameters
| Parameter | Type | Supported values | Description | |
|---|---|---|---|---|
| operation | string | "getActionText" | Hook into the action text display. Lets you change/set the action text. | The operation for which the hook function should be called. |
| "getCharacterAnimationIndex" | Hook into the change of the character animation. Lets you change/set the character animation index. | |||
| "setTextPosition" | Hook into the text display. Lets you change/set the text position. | |||
| "textRender" | Hook into the text display. Lets you write your own rendering routine. | |||
| "textText" | Hook into the text display. Lets you change/set the current text. | |||
| hookFunction | string | The name of the function which is called when the hook is executed. See the table below for the arguments the function takes. | ||
Hook function
Depending on the operation, the hook function takes and returns different arguments/values.
| operation | Arguments | Description | Return value |
|---|---|---|---|
| "getActionText" | mousePos (t_point) | The current mouse position (an associative array containing the elements x (int) and y (int)). | The new action text (str). |
| actionText (str) | The default action text generated by the engine. | ||
| "getCharacterAnimationIndex" | character (TVisObj) | The current character object. | Index (0-based) of the character animation to use for the new direction (int).
If -1 is returned, the index is handled by the engine, ignoring the hook. |
| animState (int) | The current animation state. Supported values:
| ||
| newDirection (int) | The direction of the upcoming character animation. | ||
| "setTextPosition" | text (TVisObj) | The affected text object. | True if the operation was handled in the hook function, false if the operation should be handled by the engine, ignoring the hook (bool). |
| "textRender" | text (TVisObj) | The affected text object. | True if the rendering was handled in the hook function, false if the engine should render the text, ignoring the hook (bool). |
| "textText" | text (TVisObj) | The affected text object. | The text to display (str). |
Return values
none
Examples
Example 1: Generate an individual action text.
function myActionText(mousePos, actionText)
local obj = game.CurrentObject
if obj.tableId == eObjects then
return 'This is a ' .. obj:getTextStr(VObjectName)
else
return ""
end
end
registerHookFunction("getActionText", "myActionText")
Example 2: Place character texts in the top left corner of the screen (assuming text alignment is set to "Left" in the game properties).
function myTextPosition(text)
local owner = text.Owner
if owner.tableId == eCharacters then
text.Position = {x = game.ScrollPosition.x + 30, y = game.ScrollPosition.y + 30}
return true
else
return false
end
end
registerHookFunction("setTextPosition", "myTextPosition")
