objects/oArrowTrapLeft/alarm_1.gml

From spelunky.gmk, Spelunky Classic 1.1's source, © 2008, 2009 Derek Yu and Mossmouth, LLC, shown whole under the Spelunky User License v1.1b. Extracted by spelunky.ai's tools, an unofficial fan project, one file per script or event; the // ==== lines are the extractor's, naming each action of the event. Some scripts are others' work that Derek Yu credits in the source's readme.txt: Martin Piecyk's platform engine, ChevyRay's view scaling scripts and tsg1zzn's Super Sound System.

oArrowTrapLeft's alarm 1 event, 13 lines of GML.

if (not isRoom("rLevelEditor")){    xAct = x-1;    while (not collision_point(xAct, y+8, oSolid, 0, 0))    {        if (x - xAct > 96) break;        xAct -= 1;    }    if (xAct > x-16) { xAct = x-16; }    obj = instance_create(xAct, y, oArrowTrapTest);    obj.image_xscale = ceil(((x-1)-xAct)/16);    obj.trapID = id;}