objects/oLeaves/step.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.

oLeaves's step event, 35 lines of GML.

if (not spriteSet){    if ((collision_point(x-16, y, oTree, 0, 0) or collision_point(x-16, y, oLeaves, 0, 0))and    (collision_point(x+16, y, oTree, 0, 0) or collision_point(x+16, y, oLeaves, 0, 0)))    {        sprite_index = sLeavesTop;    }}if (x > view_xview[0]-16 and x < view_xview[0] + view_wview[0]+16 and        y > view_yview[0]-16 and y < view_yview[0] + view_hview[0]+16){    if (sprite_index == sLeavesTop)    {        if ((not collision_point(x-16, y, oTree, 0, 0) and not collision_point(x-16, y, oLeaves, 0, 0)) or            (not collision_point(x+16, y, oTree, 0, 0) and not collision_point(x+16, y, oLeaves, 0, 0)))        {            instance_destroy();        }    }    else if (sprite_index == sLeaves or sprite_index == sLeavesDead)    {        if (not collision_point(x+16, y, oTree, 0, 0) and not collision_point(x+16, y, oLeaves, 0, 0))        {            instance_destroy();        }    }    else if (sprite_index == sLeavesRight or sprite_index == sLeavesDeadR)    {        if (not collision_point(x-16, y, oTree, 0, 0) and not collision_point(x-16, y, oLeaves, 0, 0))        {            instance_destroy();        }    }}