REQUEST: monster spawn fuction with rate for a custom item

[ffman22]

hello, I am trying to create a fuction, to use in my custom branch to spawn, diferent mvps, with a specific chance for each one, I want to create a version that is more easy to implement, or use with a biger number of MVPs

this is the current script that I made.

 

function	script	active_branch	{
set .tw,0;
set .@ms,0;
setarray .mob_id[0],1582,1112,1492,1147;
setarray .mob_c[0],80,60,20,10;
		for(set .@i,0; .@i< (getarraysize(.mob_c)); set .@i,.@i+1) {
		.tw += .mob_c[.@i];
		}
set .rnum, rand(.tw);
debugmes "total weight is: "+.tw;
debugmes .rnum;
freeloop(1);
		for(set .@i,0; .@i< (getarraysize(.mob_c)); set .@i,.@i+1) {
			if(.rnum <= .mob_c[.@i]){
			if(.@ms==0){
			debugmes .mob_id[.@i];
			monster "this", -1,-1, "--ja--",.mob_id[.@i], 1, "";
			.@ms = 1;
			}
			//			
			}
			else
			{
			//debugmes .rnum + "substracted by: "+.mob_c[.@i];
			.rnum -= .mob_c[.@i];	
			}
		}
freeloop(0);
}