Meshiest · September 19, 2019 03:51
diff --git a/perlin.html b/perlin.html
 <!DOCTYPE html>
 <script src="https://cdn.jsdelivr.net/npm/brs-js/dist/dist.js"></script>
 <script src="https://cdn.jsdelivr.net/gh/josephg/noisejs/perlin.js"></script>

 <a id="anchor" download="generated.brs">Download</a>

 <script>

 // ported code from http://en.wikipedia.org/wiki/Hilbert_curve
 function xy2d (n, p) {
    p = {x: p.x, y: p.y};
    var r = {x: 0, y: 0},
        s,
        d=0;
    for (s=(n/2)|0; s>0; s=(s/2)|0) {
        r.x = (p.x & s) > 0 ? 1 : 0;
        r.y = (p.y & s) > 0 ? 1 : 0;
        d += s * s * ((3 * r.x) ^ r.y);
        rot(s, p, r);
    }
    return d;
 }

 //convert d to (x,y)
 function d2xy(n, d) {
    var r = {x: 0, y: 0},
        p = {x: 0, y: 0},
        s,
        t=d;
    for (s=1; s<n; s*=2) {
        r.x = 1 & (t/2);
        r.y = 1 & (t ^ rx);
        rot(s, p, r);
        p.x += s * r.x;
        p.y += s * r.y;
        t /= 4;
    }
    return p;
 }

 //rotate/flip a quadrant appropriately
 function rot(n, p, r) {
    if (r.y === 0) {
        if (r.x === 1) {
            p.x = n-1 - p.x;
            p.y = n-1 - p.y;
        }

        //Swap x and y
        var t  = p.x;
        p.x = p.y;
        p.y = t;
    }
 }
 function v2rgb(v) {
    return ((v & 0xf800) << 8) | ((v & 0x7e0) << 5) | ((v & 0x1f) << 3); 
 }
 function putData(arr, size, coord, v) {
    var rgb = v2rgb(v);

    arr[[coord.x, coord.y]] = [
      (rgb & 0xff0000) >> 16,
      (rgb & 0xff00) >> 8,
      rgb & 0xff,
      0xff,
    ];
 }

 const size = 256;
 const area = size * size;
 const colors = {};

 for (var i = 0; i < size; i++) {
    for (var j = 0; j < size; j++) {
        var p = {x: j, y: i};
        putData(colors, size, p, xy2d(size, p));
    }
 }
 console.log(colors);

 const cake = {
  id: 'e7b7ea60-4746-a99a-e46c-e4837dae66ec',
  name: 'cake',
 };

 noise.seed(Math.random());

 const save = {
  author: {
    id: 'e7b7ea60-4746-a99a-e46c-e4837dae66ec',
    name: 'cake',
  },
  description: 'generated save',
  brick_assets: [
    'PB_DefaultBrick',
  ],
  materials: [
    'BMC_Plastic',
  ],
  brick_owners: [cake],
  bricks: Array.from({length: area}).map((_, i) => ({
    size: [5, 5, 2],
    color: colors[[i % size, Math.floor(i / size)]],
    position: [
      (i % size) * 10,
      Math.floor(i / size) * 10,
      Math.floor(Math.abs(noise.simplex2((i % size) / size, Math.floor(i / size) / size)) * 256)
    ],
  })),
 };

 console.log(xy2d(size, {x: 5, y: 0}))
 // console.log(BRS.read(BRS.write(save)));

 console.time('Generate');
 const blob = new Blob([new Uint8Array(BRS.write(save))]);
 console.timeEnd('Generate');
 anchor.href = URL.createObjectURL(blob);

 </script>
	<!DOCTYPE html>
	<script src="https://cdn.jsdelivr.net/npm/brs-js/dist/dist.js"></script>
	<script src="https://cdn.jsdelivr.net/gh/josephg/noisejs/perlin.js"></script>

	<a id="anchor" download="generated.brs">Download</a>

	<script>

	// ported code from http://en.wikipedia.org/wiki/Hilbert_curve
	function xy2d (n, p) {
	p = {x: p.x, y: p.y};
	var r = {x: 0, y: 0},
	s,
	d=0;
	for (s=(n/2)\|0; s>0; s=(s/2)\|0) {
	r.x = (p.x & s) > 0 ? 1 : 0;
	r.y = (p.y & s) > 0 ? 1 : 0;
	d += s * s * ((3 * r.x) ^ r.y);
	rot(s, p, r);
	}
	return d;
	}

	//convert d to (x,y)
	function d2xy(n, d) {
	var r = {x: 0, y: 0},
	p = {x: 0, y: 0},
	s,
	t=d;
	for (s=1; s<n; s*=2) {
	r.x = 1 & (t/2);
	r.y = 1 & (t ^ rx);
	rot(s, p, r);
	p.x += s * r.x;
	p.y += s * r.y;
	t /= 4;
	}
	return p;
	}

	//rotate/flip a quadrant appropriately
	function rot(n, p, r) {
	if (r.y === 0) {
	if (r.x === 1) {
	p.x = n-1 - p.x;
	p.y = n-1 - p.y;
	}

	//Swap x and y
	var t = p.x;
	p.x = p.y;
	p.y = t;
	}
	}
	function v2rgb(v) {
	return ((v & 0xf800) << 8) \| ((v & 0x7e0) << 5) \| ((v & 0x1f) << 3);
	}
	function putData(arr, size, coord, v) {
	var rgb = v2rgb(v);

	arr[[coord.x, coord.y]] = [
	(rgb & 0xff0000) >> 16,
	(rgb & 0xff00) >> 8,
	rgb & 0xff,
	0xff,
	];
	}

	const size = 256;
	const area = size * size;
	const colors = {};

	for (var i = 0; i < size; i++) {
	for (var j = 0; j < size; j++) {
	var p = {x: j, y: i};
	putData(colors, size, p, xy2d(size, p));
	}
	}
	console.log(colors);

	const cake = {
	id: 'e7b7ea60-4746-a99a-e46c-e4837dae66ec',
	name: 'cake',
	};

	noise.seed(Math.random());

	const save = {
	author: {
	id: 'e7b7ea60-4746-a99a-e46c-e4837dae66ec',
	name: 'cake',
	},
	description: 'generated save',
	brick_assets: [
	'PB_DefaultBrick',
	],
	materials: [
	'BMC_Plastic',
	],
	brick_owners: [cake],
	bricks: Array.from({length: area}).map((_, i) => ({
	size: [5, 5, 2],
	color: colors[[i % size, Math.floor(i / size)]],
	position: [
	(i % size) * 10,
	Math.floor(i / size) * 10,
	Math.floor(Math.abs(noise.simplex2((i % size) / size, Math.floor(i / size) / size)) * 256)
	],
	})),
	};

	console.log(xy2d(size, {x: 5, y: 0}))
	// console.log(BRS.read(BRS.write(save)));

	console.time('Generate');
	const blob = new Blob([new Uint8Array(BRS.write(save))]);
	console.timeEnd('Generate');
	anchor.href = URL.createObjectURL(blob);

	</script>