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// -----------------------------------------------------------------------------
// File: explosion_combo.ss
// Description: explosion combo script
// Author: Alexandre Martins <http://opensurge2d.org>
// License: MIT
// -----------------------------------------------------------------------------
using SurgeEngine.Transform;
using SurgeEngine.Vector2;
using SurgeEngine.Level;
//
// An Explosion Combo is a set of explosions that
// occur within a certain area, during some time
//
// Functions:
//
// - setSize(width, height): Sets the size of the area of the explosion combo.
// The area is centered on the position of this object.
// Returns this.
//
// - setDuration(seconds): Sets the duration of the explosion combo.
// Returns this.
//
object "Explosion Combo" is "private", "entity"
{
transform = Transform();
width = 64; // width of the explosion area, in pixels
height = 64; // height of the explosion area, in pixels
explosionCount = 16; // explode no more than explosionCount times
explosionTime = 0.125; // seconds
duration = 1.0; // seconds
timer = 0.0;
state "main"
{
// explosion timers
if(!timeout(duration)) {
timer += Time.delta;
if(timer >= explosionTime) {
explode();
timer -= explosionTime;
}
}
else
destroy();
}
fun explode()
{
// compute the explosion offset
lenx = Math.floor(width / 8);
leny = Math.floor(height / 4);
gridx = Math.floor(Math.random() * (1 + lenx)) - lenx / 2;
gridy = Math.floor(Math.random() * (1 + leny)) - leny / 2;
// create explosion
Level.spawnEntity("Explosion",
transform.position.translatedBy(
8 * gridx,
4 * gridy
)
);
}
// Define the size of the area
fun setSize(w, h)
{
width = Math.max(w, 0);
height = Math.max(h, 0);
return this;
}
// Define the duration of the explosion combo
fun setDuration(seconds)
{
duration = Math.max(seconds, 0);
return this;
}
}
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