lifeviewer bug

[PHPBB12345]

Console error:

Code: Select all

Uncaught TypeError: Failed to construct 'ClipboardItem': Failed to convert value to 'Blob'

Please let me know which browser you are using on which device (including version numbers).

Chrome 94

[rowett]

Please let me know which browser you are using on which device (including version numbers).

Chrome 94

Thanks

Device? (e.g. PC running Windows 11 or iPhone 11)

[PHPBB12345]

Please let me know which browser you are using on which device (including version numbers).

Chrome 94

Thanks

Device? (e.g. PC running Windows 11 or iPhone 11)

Windows 7

[squareroot12621]

How to get the "Could not decode system clipboard" bug:

1. Make sure that the rule you're using is a) not defined on LifeWiki, and b) is defined as a ruletable/ruletree in your pattern.
2. Copy the pattern. The clipboard does copy the pattern, but not the ruletable/ruletree. This means that when you...
3. paste the pattern, LifeViewer can't figure out what the rule is supposed to be, so it errors out.

Test it here:

Code: Select all

x = 3, y = 3, rule = ExampleTable
2o$b2o$bo!
@RULE ExampleTable
@TABLE
n_states:2
neighborhood:Moore
symmetries:permute
0, 1,1,1,0,0,0,0,0, 1
1, 0,0,0,0,0,0,0,0, 0
1, 1,0,0,0,0,0,0,0, 0
1, 1,1,1,1,0,0,0,0, 0
1, 1,1,1,1,1,0,0,0, 0
1, 1,1,1,1,1,1,0,0, 0
1, 1,1,1,1,1,1,1,0, 0
1, 1,1,1,1,1,1,1,1, 0

Code: Select all

x = 3, y = 3, rule = ExampleTree
2o$b2o$bo!
@RULE ExampleTree
@TREE
num_states=2
num_neighbors=8
num_nodes=32
1 0 0
2 0 0
1 0 1
2 0 2
3 1 3
1 1 1
2 2 5
3 3 6
4 4 7
2 5 0
3 6 9
4 7 10
5 8 11
3 9 1
4 10 13
5 11 14
6 12 15
3 1 1
4 13 17
5 14 18
6 15 19
7 16 20
4 17 17
5 18 22
6 19 23
7 20 24
8 21 25
5 22 22
6 23 27
7 24 28
8 25 29
9 26 30

[rowett]

How to get the "Could not decode system clipboard" bug

Fixed, thanks!

[PHPBB12345]

bug found in Script constructor
test case:

Code: Select all

#C [[ "&<>&amp;&lt;&gt;&amp;lt;&amp;gt;" ]]
x=0,y=0,rule=B3/S23
o!

[wirehead]

Just a question for Chris Rowett, why does the Lifeviewer sources still use the old prototype definitions for classes -- e.g.

Code: Select all

function Foo() { ... }
Foo.prototype.bar = function() { ... };

versus the new ES6 class syntax:

Code: Select all

class Foo {
  constructor() { ... }
  bar() { ... }
}

As far as I know, there are automated tools that can back-port the new syntax to the old (maybe it's even built-in to google closure compiler, I haven't read the documentation too thoroughly).

[rowett]

Just a question for Chris Rowett, why does the Lifeviewer sources still use the old prototype definitions for classes

Because when I started the project ES6 wasn’t ratified. Since then I haven’t seen the value in changing.

[PHPBB12345]

Define two functions:

Code: Select all

/** @returns {string} */
function encodeHTML(/** @type {string} */ text) {
	return text.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;");
}
/** @returns {string} */
function decodeHTML(/** @type {string} */ text) {
	return text.replace(/<br *\/?>/gi,"\n").replace(/<.*?>/g,"").replace(/&lt;/gi,"<").replace(/&gt;/gi,">").replace(/&nbsp;/gi," ").replace(/&amp;/gi,"&");
}

Example of using encodeHTML:

Code: Select all

textItem.innerHTML = encodeHTML(textItem.value);

Example of using decodeHTML:

Code: Select all

function cleanPattern(element) {
	var	/** @type {string} */ result = decodeHTML(element.innerHTML);

	// remove space or tab at the beginning of lines
	result = result.replace(/\n[ \t]+/g, "\n").trim();

	// if the result is empty make it a valid pattern
	if (result === "") {
		result = "!";
	}

	// return cleaned string
	return result;
}

[iddi01]

Found a bug: The rulestring StickyX cause the "show in viewer" to disappear from patterns:

Code: Select all

x = 103, y = 97, rule = StickyX
$.A12.A6.A6.A10.A2.3A12.A4.3A18.3A7.A4.A$28.A2.A2.A9.2A11.2A$12.2A18.
A5.2A4.3A8.A3.A.2A19.A8.A$.A8.A.2A11.A9.A3.A5.A13.A11.A26.A$.2A10.A8.
A.2A6.A13.A5.A3.A14.2A6.A5.A$6.A17.2A25.3A6.A2.A10.A4.3A3.A$6.A3.A4.
2A3.A4.2A7.A6.A9.2A22.A$4.A8.A.2A14.A4.A5.A9.2A34.2A.A$2.A11.A5.A10.
2A20.2A5.A.2A10.A10.2A12.A$14.2A13.A12.A17.A2.2A9.A11.A$15.2A7.A11.A
3.A4.2A.2A10.A4.A2.2A2.4A17.A$5.A11.A.A24.A4.A4.A8.A21.A4.A2.A2.A$17.
A2.A2.A6.2A6.A4.A10.A23.2A.A8.2A$17.A5.A5.A2.A10.2A7.A8.A.A24.A$.A3.A
12.A4.2A18.3A12.A6.A4.A17.A5.A$16.A.A6.A2.A12.A2.A3.A.A14.A4.A11.A$4.
A11.2A15.2A9.2A3.3A12.A10.A6.A$5.A3.A3.A10.A6.A12.2A3.4A.A4.A22.A3.A
13.A$9.3A34.A35.2A13.A$4.A2.3A11.2A5.A25.A12.A19.A$15.A.2A4.A19.A.A5.
A10.2A3.A6.A11.3A9.A$15.A10.2A5.3A13.A21.A3.A7.A9.A$26.A6.A42.A4.A.2A
7.2A$21.A.2A2.A5.A4.A11.A4.A.A9.2A4.A15.A4.A$2.A3.A.A18.3A20.A3.2A8.A
8.2A19.A$5.A15.A8.2A15.A26.A16.A.A$8.A10.A8.A.A6.2A9.A13.A16.2A$12.A
15.3A17.A9.A4.A3.A3.2A8.A$3.2A2.A4.2A3.A11.A3.A11.A22.A2.A5.A$5.A4.A
25.A.A6.A13.A8.A10.2A5.A5.A7.A$5.2A11.A15.A.A2.A14.A.A2.2A4.A7.A5.A
17.A2.A$9.A.A7.2A3.A.A2.A2.A.4A4.3A17.2A.A17.3A6.A.A2.2A.A$4.A7.A4.A.
A4.4A5.2A7.A5.A2.2A6.A8.A16.A5.2A4.4A$12.2A3.2A12.A3.A.A24.A10.A12.A
3.A8.2A$3.A3.A3.A19.A3.4A13.A27.2A2.A2.A5.A$8.2A12.2A17.2A3.A30.4A3.A
4.2A7.A$.A7.2A11.2A5.A3.A13.A2.2A16.A.2A9.A.A$13.A4.A4.A2.2A4.3A12.A
2.2A5.A4.A6.A14.A12.A$16.A.A16.A.A.A18.A.A4.A7.2A10.2A4.A$6.2A8.A4.A
3.A13.A6.A11.A9.2A3.A13.A3.A7.A$5.2A4.A10.A14.A26.A5.A13.A10.A$34.A
12.A2.A5.A.A.A10.A3.A7.A9.2A$5.A3.A16.A19.A4.A4.A3.2A5.A16.A2.A4.2A$
3.A7.A14.2A10.A4.2A17.A3.A6.A13.A5.A2.2A$4.A6.2A5.A.A11.A16.A9.A3.2A.
A8.A18.A$11.A5.2A39.A8.A.A17.A2.2A7.A$.A9.A7.A3.A6.2A12.A5.A7.2A27.2A
.3A$16.A3.2A25.3A6.A11.A4.2A9.A8.A$10.A22.A2.2A9.2A4.A8.A17.A3.2A2.A
4.2A5.A$21.A2.A7.3A3.A10.A9.3A13.A8.2A2.2A2.4A4.A$3.A9.A2.A3.3A4.A10.
2A3.2A5.A20.2A22.2A$6.A11.A2.A16.A6.A2.A3.A.A19.A.A10.A$6.2A.A.A21.A
5.A19.A5.A11.A4.A6.A$9.A8.A15.A2.A6.A9.A28.A3.A5.A$12.A3.A2.A29.A7.A
10.A24.A$.A3.A3.A2.2A6.A19.A4.A3.3A13.2A.2A7.A2.A10.A$5.3A19.A2.2A8.A
5.A19.2A7.A2.A16.A3.A$4.3A6.A2.A8.3A2.A4.2A3.A9.A30.A3.A$7.A5.A13.A
17.A2.A2.2A6.A11.A10.A2.2A.A$8.A4.A3.A29.A8.A8.2A13.A11.A$3.A4.2A2.A
8.A5.A4.2A2.2A9.2A.A8.A17.A3.A11.2A5.A$3.A24.A.A3.A9.A3.A2.A9.A9.2A5.
A2.3A16.A$4.A4.A3.A14.4A10.A3.A.2A.2A3.2A13.A9.2A2.A$2.A7.A7.A6.A4.2A
7.A6.2A19.A2.3A.A6.2A2.A10.A$13.A14.A2.2A4.A.2A20.A8.2A9.A9.A$14.A22.
A5.A7.A12.A4.3A15.2A2.2A2.A4.A$8.A6.A15.A6.A26.A5.A12.A2.2A$.A10.A5.A
10.A10.A5.A11.A3.A2.A25.A$11.2A7.A8.A15.A19.2A14.A6.A6.A$2.A.A5.2A15.
A4.A6.A14.A3.A5.2A3.A3.A6.2A2.A10.A$7.A2.A13.A13.A7.A2.A23.A10.3A5.2A
2.A$7.A2.A2.2A.A5.A3.A11.A32.A14.A3.A2.2A.A$16.A2.A4.A27.A13.2A21.A$
11.A7.A9.2A2.A18.2A17.A4.2A10.2A3.A$4.A7.A.A23.A5.A7.A14.A3.2A3.3A16.
A$27.2A2.A9.A26.A4.2A4.A11.A$14.A18.A.A18.A4.A4.A4.A6.A5.A4.A6.A.A$9.
2A2.A6.A7.A8.A13.2A.2A2.A13.2A2.2A4.2A7.A7.2A$8.2A3.2A11.A.A9.A16.2A.
A2.A5.A6.A2.A9.A2.A$28.A24.A2.4A14.2A10.2A$4.A6.A9.2A5.A14.A9.2A.3A
13.A3.A13.A2.A2.2A2.A$3.A8.A16.A2.A3.A5.2A13.A3.A23.A7.2A.A2.2A$3.A8.
A14.A14.3A3.A13.A16.2A4.2A$4.A14.A18.A9.4A29.A16.A$23.2A21.A15.A5.A9.
A5.A14.2A$11.A11.4A6.A4.A5.A36.A$7.A7.A6.3A2.3A8.2A6.A11.2A4.A16.2A$
2.A9.A16.2A3.A11.A18.A17.A8.A7.A$12.A5.A15.4A.A13.A19.A2.A12.A10.A$2.
A2.A12.2A5.A4.A.A8.2A5.A36.3A5.A2.A$4.A7.A15.A8.A.A.A8.A20.2A.A4.A11.
A2.A2.2A$4.A8.A8.A6.A29.A6.A9.A17.A4.A$5.A7.2A3.2A3.A3.A6.A12.A31.A
15.A$9.2A19.A3.3A8.A6.A17.A2.3A20.A$5.A.A23.A.4A15.2A12.2A3.A2.4A3.A$
8.A10.A12.2A16.A.A8.A9.2A!

It's not due to a problem with the ruletable or something, it's likely a conflict with the x = n, y = n in the RLE.

If this happens with any rulestring with "x" in them, that would be a kinda serious issue.

[rowett]

Found a bug: The rulestring StickyX cause the "show in viewer" to disappear from patterns:

I can see "Show in Viewer" in your example.

[b-engine]

There's a good chance that you can't use the pan function on mobile (maybe also happens in other touchscreen devices). When you tap somewhere in the viewer window, it seems to be like holding the "cursor".
Screenshot_2024-04-04-14-16-06-42_40deb401b9ffe8e1df2f1cc5ba480b12.jpg
This had frustrated me for a long time, while the bug seems to haven't been noticed by someone else yet.

...
I can't reproduce this.

This also happens on other Android devices, as I confirmed. I don't like it but it's still staying.
If you want to trigger the bug, please use a touchscreen device.

[b-engine]

This also happens on other Android devices, as I confirmed. I don't like it but it's still staying.
If you want to trigger the bug, please use a touchscreen device.

Browse the forums for a while and randomly open viewers, until you see at least one not working. If a viewer doesn't work, then all won't work.

[tommyaweosme]

fun fact: lifeviewer does not support 2e or 2i in von neumann. all von neumann rules in lifeviewer have to be totalistic

[confocaloid]

fun fact: lifeviewer does not support 2e or 2i in von neumann. all von neumann rules in lifeviewer have to be totalistic

I think it's not really a bug, but instead a consequence of lack of *any* single commonly agreed notation for non-totalistic isotropic two-state range-1 von Neumann CA. (Perhaps, combined with lack of an obvious reason for implementing any such notation; you only enlarge the rulespace by a factor of 4 by allowing non-totalistic CA while keeping the same neighbourhood.)

Some relevant discussion:

Are you looking for a mapping like this (from range-1 von Neumann conditions to sets of Hensel conditions), or the question is about something else?
Edit: added third column for the case with two coexisting universes rotated 45 degrees, where only diagonal neighbours are considered.

Code: Select all

R1 von Neumann condition          Hensel conditions   Rotated (corners only)
----------------------------------------------------------------------------
0 alive neighbours                01c2cn3c4c          01e2ei3e4e
1 alive neighbour                 1e2ka3inyq4ny5e     1c2ka3kajr4jr5c
2 opposite alive neighbours       2i3r4itz5r6i        2n3q4qwz5q6n
2 non-opposite alive neighbours   2e3kaj4kaqw5kaj6e   2c3iny4kait5iny6c
3 alive neighbours                3e4jr5inyq6ka7e     3c4ny5kajr6ka7c
4 alive neighbours                4e5c6cn7c8          4c5e6ei7e8

I'm just looking for whatever letters are used for conditions in R1 VN rulestrings, analogously to R1 Moore.

For 2-state isotropic CA using the range-1 von Neumann neighbourhood, the configuration needs to be specified only when there are two alive neighbours (either two opposite neighbours, or not). I don't remember any established notation to distinguish between these two that would be analogous to Hensel notation.

(There were discussions/proposals for range-2 von Neumann neighbourhood:)

We just had a conversation on Discord that might make this a lot easier to use. [...]

[...]Alright this thing is complicated.

[Banananananan]

For some reason sometimes lifeviewer makes the sim stop by increments of 3. When I start, it pauses at 3 ticks. When I start again, it pauses at 6 ticks, and so on.

[rowett]

There's a good chance that you can't use the pan function on mobile (maybe also happens in other touchscreen devices). When you tap somewhere in the viewer window, it seems to be like holding the "cursor".
Screenshot_2024-04-04-14-16-06-42_40deb401b9ffe8e1df2f1cc5ba480b12.jpg
This had frustrated me for a long time, while the bug seems to haven't been noticed by someone else yet.

...
I can't reproduce this.

This also happens on other Android devices, as I confirmed. I don't like it but it's still staying.
If you want to trigger the bug, please use a touchscreen device.

I tried it on an Android device and can't reproduce what you're seeing. Can anyone else reproduce the issue?

[b-engine]

I tried it on an Android device and can't reproduce what you're seeing. Can anyone else reproduce the issue?

Try a few more times, it doesn't occur in every attempt.

[b-engine]

Why viewer/LV tag makes embedded LifeViewer like this?

Screenshot_20240713_062503_com.android.chrome.jpg (136.32 KiB) Viewed 13797 times

Only works on narrow screen device.

[squareroot12621]

Why viewer/LV tag makes embedded LifeViewer like this?
<image snipped>
Only works on narrow screen device.

It looks that way because it's narrow—if you want to see all of it, either get a bigger screen, zoom out to 50%, or use the horizontal scrollbar at the bottom.

[muzik]

Code: Select all

x = 103, y = 97, rule = StickyX
$.A12.A6.A6.A10.A2.3A12.A4.3A18.3A7.A4.A$28.A2.A2.A9.2A11.2A$12.2A18.
A5.2A4.3A8.A3.A.2A19.A8.A$.A8.A.2A11.A9.A3.A5.A13.A11.A26.A$.2A10.A8.
A.2A6.A13.A5.A3.A14.2A6.A5.A$6.A17.2A25.3A6.A2.A10.A4.3A3.A$6.A3.A4.
2A3.A4.2A7.A6.A9.2A22.A$4.A8.A.2A14.A4.A5.A9.2A34.2A.A$2.A11.A5.A10.
2A20.2A5.A.2A10.A10.2A12.A$14.2A13.A12.A17.A2.2A9.A11.A$15.2A7.A11.A
3.A4.2A.2A10.A4.A2.2A2.4A17.A$5.A11.A.A24.A4.A4.A8.A21.A4.A2.A2.A$17.
A2.A2.A6.2A6.A4.A10.A23.2A.A8.2A$17.A5.A5.A2.A10.2A7.A8.A.A24.A$.A3.A
12.A4.2A18.3A12.A6.A4.A17.A5.A$16.A.A6.A2.A12.A2.A3.A.A14.A4.A11.A$4.
A11.2A15.2A9.2A3.3A12.A10.A6.A$5.A3.A3.A10.A6.A12.2A3.4A.A4.A22.A3.A
13.A$9.3A34.A35.2A13.A$4.A2.3A11.2A5.A25.A12.A19.A$15.A.2A4.A19.A.A5.
A10.2A3.A6.A11.3A9.A$15.A10.2A5.3A13.A21.A3.A7.A9.A$26.A6.A42.A4.A.2A
7.2A$21.A.2A2.A5.A4.A11.A4.A.A9.2A4.A15.A4.A$2.A3.A.A18.3A20.A3.2A8.A
8.2A19.A$5.A15.A8.2A15.A26.A16.A.A$8.A10.A8.A.A6.2A9.A13.A16.2A$12.A
15.3A17.A9.A4.A3.A3.2A8.A$3.2A2.A4.2A3.A11.A3.A11.A22.A2.A5.A$5.A4.A
25.A.A6.A13.A8.A10.2A5.A5.A7.A$5.2A11.A15.A.A2.A14.A.A2.2A4.A7.A5.A
17.A2.A$9.A.A7.2A3.A.A2.A2.A.4A4.3A17.2A.A17.3A6.A.A2.2A.A$4.A7.A4.A.
A4.4A5.2A7.A5.A2.2A6.A8.A16.A5.2A4.4A$12.2A3.2A12.A3.A.A24.A10.A12.A
3.A8.2A$3.A3.A3.A19.A3.4A13.A27.2A2.A2.A5.A$8.2A12.2A17.2A3.A30.4A3.A
4.2A7.A$.A7.2A11.2A5.A3.A13.A2.2A16.A.2A9.A.A$13.A4.A4.A2.2A4.3A12.A
2.2A5.A4.A6.A14.A12.A$16.A.A16.A.A.A18.A.A4.A7.2A10.2A4.A$6.2A8.A4.A
3.A13.A6.A11.A9.2A3.A13.A3.A7.A$5.2A4.A10.A14.A26.A5.A13.A10.A$34.A
12.A2.A5.A.A.A10.A3.A7.A9.2A$5.A3.A16.A19.A4.A4.A3.2A5.A16.A2.A4.2A$
3.A7.A14.2A10.A4.2A17.A3.A6.A13.A5.A2.2A$4.A6.2A5.A.A11.A16.A9.A3.2A.
A8.A18.A$11.A5.2A39.A8.A.A17.A2.2A7.A$.A9.A7.A3.A6.2A12.A5.A7.2A27.2A
.3A$16.A3.2A25.3A6.A11.A4.2A9.A8.A$10.A22.A2.2A9.2A4.A8.A17.A3.2A2.A
4.2A5.A$21.A2.A7.3A3.A10.A9.3A13.A8.2A2.2A2.4A4.A$3.A9.A2.A3.3A4.A10.
2A3.2A5.A20.2A22.2A$6.A11.A2.A16.A6.A2.A3.A.A19.A.A10.A$6.2A.A.A21.A
5.A19.A5.A11.A4.A6.A$9.A8.A15.A2.A6.A9.A28.A3.A5.A$12.A3.A2.A29.A7.A
10.A24.A$.A3.A3.A2.2A6.A19.A4.A3.3A13.2A.2A7.A2.A10.A$5.3A19.A2.2A8.A
5.A19.2A7.A2.A16.A3.A$4.3A6.A2.A8.3A2.A4.2A3.A9.A30.A3.A$7.A5.A13.A
17.A2.A2.2A6.A11.A10.A2.2A.A$8.A4.A3.A29.A8.A8.2A13.A11.A$3.A4.2A2.A
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8.A10.A12.2A16.A.A8.A9.2A!

Why does everything in the middle disappear at generation 6466? I don't see any paste commands.

[dvgrn]

Why does everything in the middle disappear at generation 6466? I don't see any paste commands.

The leftward line of photons becomes contiguous and touches the western edge at that tick. You can see shorter streams of photons disappearing as they touch the wall, many times before that point.

[rowett]

Why does everything in the middle disappear at generation 6466? I don't see any paste commands.

The leftward line of photons becomes contiguous and touches the western edge at that tick. You can see shorter streams of photons disappearing as they touch the wall, many times before that point.

LifeViewer will now let you know when this happens: "Cells deleted after hitting boundary".

[b-engine]

The cellmap generated from identifier seems to wrap.
This is the original pattern (HighLife p96 in a hexagonal tiling):

Code: Select all

x = 27, y = 27, rule = R1,C2,S2-3,B3,6,NW111101111H
25b2o$25b2o18$11b3o$11bo2bo$11bo3bo$12bo2bo$13b3o2$2o$2o!

Here's the cellmap:

The 2 blobs at the corners is the result of wrapping;
The bottom-right corner is bugged

cellmap (1).png (3.87 KiB) Viewed 13366 times

[pifricted]

Some grid lines lost when angle != 0