语法：

vertex_format_add_position();

返回：

N/A（无返回值）

描述

Tell GameMaker Studio 2 to accept 2D positional data (x and y) as part of the new vertex format being created.

例如：

vertex_format_begin();
vertex_format_add_colour();
vertex_format_add_position();
my_format = vertex_format_end();

The above code will create a new vertex format with just colour and position values and then store the format id in the variable "my_format".