layer_get_script_begin

描述

You supply the layer ID (which you get when you create the layer using layer_create()) or the layer name (as a string - this will have a performance impact) and this function will return the script index of the script assigned to run at the beginning of rendering for that layer, or it will return -1 if no script is assigned.

语法：

layer_get_script_begin(layer_id);

参数：

参数	描述
layer_id	The unique ID value of the layer to target (or the layer name as a string)

返回：

Script Index (Real) or -1 if no script is assigned

例如：

if layer_get_script_begin(layer) == -1
   {
   layer_script_begin(layer, scr_SetShaderValues);
   }

The above code will check to see if the layer that the instance running the code has a script assigned to it and if it doesn't one is assigned.

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