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77 lines
1.5 KiB
JavaScript
77 lines
1.5 KiB
JavaScript
// freej example script by jaromil
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// this simply draws i kind of star
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// it also shows the usage of keyboard controller
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// press 'q' to quit while running
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x = 100;
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y = 100;
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s = 30 / 0.383;
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s2 = s;
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PI = 3.141592654;
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c = PI * 2;
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o = -PI / 2;
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function drawStar(lay, s_mul, s2_mul) {
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s = s_mul / 0.383;
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s2 = s / s2_mul;
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var cx;
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for(cx=0; cx<10; cx++) {
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k = cx/10;
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kn = k+0.1;
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x1 = x+s * Math.cos(o + k*c);
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y1 = y+s * Math.sin(o + k*c);
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x2 = x+s2 * Math.cos(o + kn*c);
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y2 = y+s2 * Math.sin(o + kn*c);
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x1 = Math.floor(x1);
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y1 = Math.floor(y1);
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x2 = Math.floor(x2);
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y2 = Math.floor(y2);
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// debug("drawing star line:" + x1 + "," + y1 + " " + x2 + "," + y2);
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// lay.line( x.toPrecision()+s.toPrecision() * Math.cos(o + k*c),
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// y+s * Math.sin(o + k*c),
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// x+s2 * Math.cos(o + kn*c),
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// y+s2 * Math.sin(o + kn*c) );
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lay.aaline(x1, y1, x2, y2);
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}
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}
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running = true;
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kbd = new KeyboardController();
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kbd.pressed_esc = function() { running = false; }
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register_controller( kbd );
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star = new GeometryLayer();
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star.color(255,255,255,255);
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star.set_blit("alpha");
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//star.set_name("star.js");
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star.set_blit_value(0.1);
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//star.start();
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star.activate(true);
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add_layer(star);
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drawStar(star,30,1);
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srand();
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cc = 1;
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bang = new TriggerController();
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register_controller(bang);
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bang.frame = function() {
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cc += 0.05;
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star.color(rand()%255, rand()%255, rand()%255, 0xff);
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drawStar(star, 30, Math.sin(cc));
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if(cc>4.0) {
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cc = 1;
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srand();
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}
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}
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