scripts/isCollisionLeft.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.

The script isCollisionLeft, 11 lines of GML.

/*An object can only use this script after calling "setCollisionBounds."0: Number of pixels left of the collision rectangle to check for a collisionwith a solid object.*/calculateCollisionBounds()if collision_line(round(lb-argument0),round(tb),round(lb-argument0),round(bb-1),oSolid,1,1)>0{  return 1}return 0