objects/oYellowBall/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.

oYellowBall's step event, 29 lines of GML.

x += xVel;y += yVel;if (collision_rectangle(x-8, y-8, x+8, y+8, oSolid, 0, 0) and    not collision_rectangle(x-8, y-8, x+8, y+8, oOlmec, 0, 0)){    x -= xVel;    y -= yVel;    if (rand(1,2) == 1) n = rand(1,4);    else n = rand(1,5);    switch (n)    {        case 1: { instance_create(x-8, y-8, oBat); break; }        case 2: { instance_create(x-8, y-8, oSpider); break; }        case 3: { instance_create(x-8, y-8, oSnake); break; }        case 4: { instance_create(x-8, y-8, oFrog); break; }        case 5: { instance_create(x-8, y-8, oFireFrog); break; }    }    instance_destroy();}if (yVel < 6) yVel += 0.15;/*if (collision_point(x, y, oDark, 0, 0) or    collision_point(x, y, oDarkFall, 0, 0) or    collision_point(x, y, oIce, 0, 0)){    instance_destroy();}*/