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tui window demo: bouncing ball

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minjaesong
2021-01-29 14:50:35 +09:00
parent d963cf8294
commit 795fa7f85f
1 changed files with 32 additions and 2 deletions
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34
assets/disk0/tvdos/tuidev/demo.js
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@@ -56,12 +56,42 @@ class Demo extends SimpleScreen {
constructor(title) {
super(title);
let mainCanvas = new Canvas("main");
con.curs_set(0);
mainCanvas.redraw = () => {
}
this.ballX = 1 + ((Math.random() * this.termWidth)|0);
this.ballY = 1 + ((Math.random() * (this.termHeight-1))|0)
this.ballMomentumX = (Math.random() < 0.5) ? -1 : 1;
this.ballMomentumY = (Math.random() < 0.5) ? -1 : 1;
this.collision = 0;
mainCanvas.update = () => {
con.move(2 + (Math.random()*(this.termHeight - 1)), 1 + (Math.random()*this.termWidth));
con.addch(0xB3 + (Math.random()*39));
// erase a track
con.mvaddch(this.ballY, this.ballX, 0);
// collide
if (this.ballX <= 1) this.ballMomentumX = 1;
if (this.ballX >= this.termWidth) this.ballMomentumX = -1;
if (this.ballY <= 2) this.ballMomentumY = 1;
if (this.ballY >= this.termHeight) this.ballMomentumY = -1;
// collision counter
if (this.ballX <= 1 || this.ballX >= this.termWidth || this.ballY <= 2 || this.ballY >= this.termHeight) {
this.collision += 1;
this.title = "Ctrl-C to exit - "+this.collision;
this.drawTitlebar();
}
// move
this.ballX += this.ballMomentumX;
this.ballY += this.ballMomentumY;
// draw
con.mvaddch(this.ballY, this.ballX, 2);
sys.spin();sys.spin();sys.spin();sys.spin();
}
this.mainCanvas = mainCanvas