Add tetris app, first commit

apps/tetris/README.md

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+# Tetris
+
+Bangle version of the classic game of Tetris.
+
+## Controls
+
+Tapping the screen rotates the pieces once, swiping left, right or down moves the
+piece in that direction, if possible.

apps/tetris/app-icon.js

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+require("heatshrink").decompress(atob("mEwxH+If4A/AH4A/AH4A/ABe5AA0jABwvYAIovBgABEFAQHFL7IuEL4QuFA45fcF4YuNL7i/FFwoHHL7QvFFxpfaF4wAOF/4nHF5+0AAy3SXYoHGW4QBDF4MAAIgvRFwwHHdAbqDFIQuDL6ouJL4ovDFwpfUAAoHFL4a/FFwhfTFxZfDF4ouFL6QANFopfDF/4vNjwAGF8ABFF4MAAIgvBX4IBDX4YBDL6TyFFIIuEL4QuEL4QuEL6ovDFwpfFF4YuFL6i/FFwhfEX4ouEL6YvFFwpfDF4ouFL6QvGAAwtFL4Yv/AAonHAB4vHG563CAIbuDA5i/CAIb2DA4hfJEwoHPFApZEGwpfLFyJfFFxJfMAAoHNFAa5GX54uTL4YuLL5QAVFowAIF+4A/AH4A/AH4A/AHY"))

apps/tetris/metadata.json

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+{ "id": "tetris",
+  "name": "Tetris",
+  "shortName":"Tetris",
+  "version":"0.01",
+  "description": "Tetris",
+  "icon": "tetris.png",
+  "readme": "README.md",
+  "tags": "games",
+  "supports" : ["BANGLEJS2"],  
+  "storage": [
+    {"name":"tetris.app.js","url":"app.js"},
+    {"name":"tetris.img","url":"app-icon.js","evaluate":true},
+  ]
+}

apps/tetris/tetris.app.js

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+const block = Graphics.createImage(`
+########
+# # # ##
+## # ###
+# # ####
+## #####
+# ######
+########
+########
+`);
+const tcols = [ {r:0, g:0, b:1}, {r:0, g:1, b:0}, {r:0, g:1, b:1}, {r:1, g:0, b:0}, {r:1, g:0, b:1}, {r:1, g:1, b:0}, {r:1, g:0.5, b:0.5} ];
+const tiles = [
+  [[0, 0, 0, 0],
+   [0, 0, 0, 0],
+   [1, 1, 1, 1],
+   [0, 0, 0, 0]],
+  [[0, 0, 0],
+   [0, 1, 0],
+   [1, 1, 1]],
+  [[0, 0, 0],
+   [1, 0, 0],
+   [1, 1, 1]],
+  [[0, 0, 0],
+   [0, 0, 1],
+   [1, 1, 1]],
+  [[0, 0, 0],
+   [1, 1, 0],
+   [0, 1, 1]],
+  [[0, 0, 0],
+   [0, 1, 1],
+   [1, 1, 0]],
+  [[1, 1],
+   [1, 1]]
+];
+
+const ox = 176/2 - 5*8;
+const oy = 8;
+
+var pf = Array(23).fill().map(()=>Array(12).fill(0)); // field is really 10x20, but adding a border for collision checks
+pf[20].fill(1);
+pf[21].fill(1);
+pf[22].fill(1);
+pf.forEach((x,i) => { pf[i][0] = 1; pf[i][11] = 1; });
+
+function rotateTile(t, r) {
+  var nt = JSON.parse(JSON.stringify(t));
+  if (t.length==2) return nt;
+  var s = t.length;
+  for (m=0; m<r; ++m) {
+    tl = JSON.parse(JSON.stringify(nt));
+    for (i=0; i<s; ++i)
+      for (j=0; j<s; ++j)
+        nt[i][j] = tl[s-1-j][i];
+  }
+  return nt;
+}
+
+function drawBoundingBox() {
+  g.setBgColor(0, 0, 0).clear().setColor(1, 1, 1);
+  g.theme.bg = 0;
+  for (i=0; i<4; ++i) g.drawRect(ox-i-1, oy-i-1, ox+10*8+i, oy+20*8+i);
+}
+
+function drawTile (tile, n, x, y, qClear) {
+  if (qClear) g.setColor(0);
+  else g.setColor(tcols[n].r, tcols[n].g, tcols[n].b);
+  for (i=0; i<tile.length; ++i)
+    for (j=0; j<tile.length; ++j)
+      if (tile[j][i]>0)
+        if (qClear) g.fillRect(x+8*i, y+8*j, x+8*(i+1)-1, y+8*(j+1)-1);
+        else g.drawImage(block, x+8*i, y+8*j);
+}
+
+function showNext(n, r) {
+  var nt = rotateTile(tiles[n], r);
+  g.setColor(0).fillRect(176-33, 40, 176-33+33, 82);
+  drawTile(nt, ntn, 176-33, 40);
+}
+
+var time = Date.now();
+var px=4, py=0;
+var ctn = Math.floor(Math.random()*7); // current tile number
+var ntn = Math.floor(Math.random()*7); // next tile number
+var ntr = Math.floor(Math.random()*4); // next tile rotation
+var ct = rotateTile(tiles[ctn], Math.floor(Math.random()*4)); // current tile (rotated)
+var dropInterval = 450;
+var nlines = 0;
+
+function redrawPF(ly) {
+  for (y=0; y<=ly; ++y)
+    for (x=1; x<11; ++x) {
+      c = pf[y][x];
+      if (c>0) g.setColor(tcols[c-1].r, tcols[c-1].g, tcols[c-1].b).drawImage(block, ox+(x-1)*8, oy+y*8);
+      else g.setColor(0, 0, 0).fillRect(ox+(x-1)*8, oy+y*8, ox+x*8-1, oy+(y+1)*8-1);
+    }
+}
+
+function insertAndCheck() {
+  for (y=0; y<ct.length; ++y) 
+    for (x=0; x<ct[y].length; ++x)
+      if (ct[y][x]>0) pf[py+y][px+x+1] = ctn+1;
+  // check for full lines
+  for (y=19; y>0; y--) {
+    var qFull = true;
+    for (x=1; x<11; ++x) qFull &= pf[y][x]>0;
+    if (qFull) {
+      nlines++;
+      dropInterval -= 5;
+      Bangle.buzz(30);
+      for (ny=y; ny>0; ny--) pf[ny] = JSON.parse(JSON.stringify(pf[ny-1]));
+      redrawPF(y);
+      g.setColor(0).fillRect(5, 30, 41, 80).setColor(1, 1, 1).drawString(nlines.toString(), 22, 50);
+    }
+  }
+  // spawn new tile
+  px = 4; py = 0;
+  ctn = ntn;
+  ntn = Math.floor(Math.random()*7);
+  ct = rotateTile(tiles[ctn], ntr);
+  ntr = Math.floor(Math.random()*4);
+  showNext(ntn, ntr);
+}
+
+function moveOk(t, dx, dy) {
+  var ok = true;
+  for (y=0; y<t.length; ++y) 
+    for (x=0; x<t[y].length; ++x)
+      if (t[y][x]*pf[py+dy+y][px+dx+x+1] > 0) ok = false;
+  return ok;
+}
+
+function gameStep() {
+  if (Date.now()-time > dropInterval) { // drop one step
+    time = Date.now();
+    if (moveOk(ct, 0, 1)) {
+      drawTile(ct, ctn, ox+px*8, oy+py*8, true);
+      py++;
+    }
+    else { // reached the bottom
+      insertAndCheck(ct, ctn, px, py);
+    }
+    drawTile(ct, ctn, ox+px*8, oy+py*8, false);
+  }
+}
+
+Bangle.setUI();
+Bangle.on("touch", (e) => {
+  t = rotateTile(ct, 3);
+  if (moveOk(t, 0, 0)) {
+    drawTile(ct, ctn, ox+px*8, oy+py*8, true);
+    ct = t;
+    drawTile(ct, ctn, ox+px*8, oy+py*8, false);
+  }
+});
+
+Bangle.on("swipe", (x,y) => {
+  if (y<0) y = 0;
+  if (moveOk(ct, x, y)) {
+    drawTile(ct, ctn, ox+px*8, oy+py*8, true);
+    px += x;
+    py += y;
+    drawTile(ct, ctn, ox+px*8, oy+py*8, false);
+  }
+});
+
+drawBoundingBox();
+g.setColor(1, 1, 1).setFontAlign(0, 1, 0).setFont("6x15", 1).drawString("Lines", 22, 30).drawString("Next", 176-22, 30);
+showNext(ntn, ntr);
+g.setColor(0).fillRect(5, 30, 41, 80).setColor(1, 1, 1).drawString(nlines.toString(), 22, 50);
+var gi = setInterval(gameStep, 20);