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// -----------------------------------------------------------------------------
// File: elevator.ss
// Description: elevator script
// Author: Alexandre Martins <http://opensurge2d.org>
// License: MIT
// -----------------------------------------------------------------------------
using SurgeEngine.Actor;
using SurgeEngine.Brick;
using SurgeEngine.Player;
using SurgeEngine.Level;
using SurgeEngine.Transform;
using SurgeEngine.Vector2;
using SurgeEngine.Collisions.CollisionBox;
//
// Elevator API
//
// Properties:
// - anim: number. Will render the specified animation number of the "Elevator" sprite.
// - speed: number. The speed of the elevator, in px/s.
// - transform: Transform object, read-only.
// - collider: Collider object, read-only.
//
// Functions:
// - addListener(obj). Adds a listener object (obj) to this elevator. This will call:
// obj.onElevatorActivate(this) whenever this elevator is activated, and
// obj.onElevatorComplete(this) whenever this elevator completes its path.
//
object "Elevator" is "entity", "gimmick"
{
public readonly collider = CollisionBox(128, 8);
public readonly transform = Transform();
public speed = 60; // in px/s
lineCollider = CollisionBox(128, 1);
actor = Actor("Elevator");
brick = Brick("Elevator");
cables = [];
listeners = [];
sign = 0;
state "main"
{
actor.zindex = 0.65;
state = "idle";
}
state "idle"
{
// wait for the player(s)
for(i = 0; i < Player.count; i++) {
player = Player[i];
if(collider.collidesWith(player.collider)) {
setup(); // update cables
state = "active";
notifyListeners();
return;
}
}
}
state "active"
{
// check if there's more room to go
if(!findOverlappingCable()) {
state = "done";
fixPositions();
notifyListeners();
return;
}
// move the elevator
oldY = Math.floor(transform.localPosition.y);
transform.translateBy(0, sign * speed * Time.delta);
dy = Math.floor(transform.localPosition.y) - oldY;
// move the player(s)
for(i = 0; i < Player.count; i++) {
player = Player[i];
if(collider.collidesWith(player.collider))
player.moveBy(0, dy);
}
}
state "done"
{
}
fun constructor()
{
this.anim = 0;
collider.setAnchor(0, 1);
//collider.visible = true;
lineCollider.setAnchor(0, 0);
}
fun setup()
{
// setup the elevator
cables = Level.findEntities("Elevator Cable");
sign = shouldMoveUp() ? -1.0 : 1.0;
}
fun findOverlappingCable()
{
for(i = 0; i < cables.length; i++) {
if(lineCollider.collidesWith(cables[i].collider))
return cables[i];
}
return null;
}
fun shouldMoveUp()
{
return true; // FIXME
}
fun fixPositions()
{
oldy = Math.round(transform.position.y - sign * speed * Time.delta);
transform.position = Vector2(transform.position.x, oldy + (oldy % 2));
for(i = 0; i < Player.count; i++) {
player = Player[i];
if(collider.collidesWith(player.collider)) {
oldy = Math.round(player.transform.position.y - sign * speed * Time.delta);
player.transform.position = Vector2(player.transform.position.x, oldy + (oldy % 2));
}
}
}
fun notifyListeners()
{
for(j = 0; j < listeners.length; j++) {
if(state == "active")
listeners[j].onElevatorActivate(this);
else if(state == "done")
listeners[j].onElevatorComplete(this);
}
}
fun onReset()
{
state = "idle";
}
fun onLeaveEditor()
{
setup();
state = "idle";
}
//
// public API
//
fun get_anim()
{
return actor.anim;
}
fun set_anim(id)
{
actor.anim = id;
}
fun addListener(obj)
{
if(listeners.indexOf(obj) < 0)
listeners.push(obj);
}
}
object "Elevator Cable" is "entity", "gimmick"
{
public readonly collider = CollisionBox(8, 128);
state "main"
{
collider.setAnchor(0, 0);
}
}
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