説明

The Ptr Lua function returns the handle to a child object.

引数

• handle:
  The function takes a handle of the type "light_userdata" as an argument.
  It can be omitted when using the colon notation on an object.

  The Colon Notation is a way to omit the handle as the first argument when using the Object functions.

  This is the general syntax with the colon notation: object:function()

  This is the general syntax with standard handle notation: object.function(object)

  Learn more in the Lua Functions - Object API topic.
  

• Integer:
  This is the index number for the desired child object. This index is 1-based.
  

戻り値

• handle または nil:
  The function returns a handle to the child object. If the child object does not exist, then it returns nil.

例

This example prints the data connected to the first child of the selected sequence. It uses the Dump() function.

return function()
    -- SelectedSequence() creates a handle to the selected sequence.
    local selectedSequence = SelectedSequence()
    -- Check that a handle was returned - if not then exit function.
    if selectedSequence == nil then
        ErrPrintf("There is no selected sequence.")
        return
    end
    -- Get a handle to the first child object.
    local firstChild = selectedSequence:Ptr(1)
    -- Print some feedback.
    if firstChild ~= nil then
        Printf("=============== START OF DUMP ===============")
        firstChild:Dump()
        Printf("================ END OF DUMP ================")
    else
        ErrPrintf("The object do not have a child object.")
    end
end