// freej example script by jaromil
// this simply draws i kind of star
// it also shows the usage of keyboard controller
// press 'q' to quit while running


x = 100;
y = 100;
s = 30 / 0.383;
s2 = s;

PI = 3.141592654;
c = PI * 2;
o = -PI / 2;

scr = new Screen();
if (!scr.initialized) {
    // screen hasn't been initialized yet, let's do it now
    scr.init(400,300);
    add_screen(scr);
} 

W = get_width();
H = get_height();

function drawStar(lay, s_mul, s2_mul) {
    s = s_mul / 0.383;
    s2 = s / s2_mul;

    var cx;
    for(cx=0; cx<10; cx++) {
	k = cx/10;
	kn = k+0.1;
	
	x1 =   x+s * Math.cos(o + k*c);
	y1 =   y+s * Math.sin(o + k*c);
	x2 =   x+s2 * Math.cos(o + kn*c);
	y2 =   y+s2 * Math.sin(o + kn*c);
 	x1 = Math.floor(x1);
 	y1 = Math.floor(y1);
 	x2 = Math.floor(x2);
 	y2 = Math.floor(y2);

//	debug("drawing star line:" + x1 + "," + y1 + " " + x2 + "," + y2);
// 	lay.line( x.toPrecision()+s.toPrecision() * Math.cos(o + k*c),
// 		  y+s * Math.sin(o + k*c),
// 		  x+s2 * Math.cos(o + kn*c),
// 		  y+s2 * Math.sin(o + kn*c)  );
	lay.aaline(x1, y1, x2, y2);
    }
}

running = true;

var kbd;
star_kbd = new KeyboardController();
star_kbd.released_esc = function() { quit(); };
star_kbd.released_r = function() {
    echo("reset called");
    reset();
};
register_controller( star_kbd );

var star;
star = new GeometryLayer(W,H);
star.color(255,255,255,255);
//star.set_blit("alpha");
//star.set_name("star.js");
//star.set_blit_value(0.1);
//star.start();
star.activate(true);
scr.add_layer(star);

drawStar(star,30,1);

srand();

cc = 1;

var star_bang;
star_bang = new TriggerController();
register_controller(star_bang);
star_bang.frame = function() {

    cc += 0.05;

    star.color(rand()%255, rand()%255, rand()%255, 0xff);
    drawStar(star, 30, Math.sin(cc));

    if(cc>4.0) {
	cc = 1;
	srand();
    }
}