Hi Brian,
thanks Brian will have a play.
Cheers
Barry

And it should be remembered here that it is indeed the egg which precedes the Chicken!


- Zooen

Thanks Brian,

Brilliant!

Hey Brian,
Thanks again. I have all of your scripts and commands.

Regarding this one and generating a solid, is there any information on creating a smooth result?

Meaning, your curves iteration doesn't end in tangency, and produces little dimples on the ends....

If the last 2 points on each end of the result curve were g1\linear or planar, then the revolve would be perfectly smooth.

I just don't know enough about these types of math equations to know whether looking at that changes it from an eggovoid and breaks the intent....

Anyway, just some food to the discussion...

Thanks to everyone for their comments.

Hi BurrMan,
The lack of tangency is a major fault.
I had assumed all along that the ends were vertically tangent, and had written so in some preliminary documentation.
The point density at the ends seems low...

Will do some checking...

- Brian

Trimming the top and bottom curves at an endpoint with a tiny circle, and Blending, makes the ends tangent. But moves the endpoint a bit...

The biconcave script does not have this lack of tangency problem...

Hey Brian,
Yeah, we can get smooth.

The curve is so dense i didn't trust moving points either as i would probably just make a smooth dimple...

I just wanted to mention it in case you had missed it. It may be some type of "function" that should be added to all of your "math" scripts to get those end points tangenct.

Maybe michael can comment if he see's some type of "finishing function" that can be added for that, or if is a complex rewrite....

We can hope for some kind if "now that you have processed this curve, perform the "tangent end commit code" or something....

Anyway, i appreciate your work.

Thank you BurrMan.

So with a few modest changes to the script, the ends are now tangent. (The interpcurve factory did the work.)
Also the closed curve, full profile is created.
The full profile can be revolved 360 degrees to show the solid.

Removed the bottom checkbox.
Recreated var bottom = false, for the top half of the profile, and sent the points to the interpcurve factory.
Set bottom to true, and sent the bottom points to the interpcurve factory, using --i as a countdown from (numpoints-2), down to and including 0.

I suppose an x axis revolve axis could be added, and a revolve checkbox...

Added new EggOvoid2.zip to the first post. Removed old EggOvoid.js and EggOvoid.htm.

Very happy,
- Brian

A question for Michael, please.

Is there some way to create a dropdown list, somewhat like the Build menu for Lineweb, where each choice has an associated list of parameters,
which will populate the menu's below the dropdown list, (perhaps including sliders)? (Rather than having to manually enter the various default values.)

For example, choices in the Build menu are Hen or Duck, etc:

Hen, L = 62, B = 45.5, wShift = 5.7, D = 35.6.

Duck, L = 80, B = 50, wShift = 6, D = 34. (fictitious numbers)

Thank you,
Brian

(I tried some trial and error, without success.)

Hi Brian,
thanks for version 2
Is it possible you can update your previous Egghalf script to give tangency also.
If not no problem.
Cheers
Barry

Brian,
You are the man!!!

Hi Barry,

The EggOvoid2 script is a modified version of the EggOvoid script.
If only the top half of the full profile is desired, the user can just trim with a line along the x axis and delete the bottom half.
This could be added to the EggOvoid2 script as a checkbox and a bit of code...

- Brian

Hi Brian,
I'm referring to your old (10 years ago) EggHalf script not your current versions.
Cheers
Barry

Hi Barry,
It must have been called something else. I dont see an "EggHalf" command from Brian.

Most likely it was called by its math name... Like "Enniper" or something. But i dont know which math curve equals an egg shape.

Do you have the old one available?

Hi Brian,

re:
> Is there some way to create a dropdown list, somewhat like the Build menu for Lineweb, where each
> choice has an associated list of parameters,
> which will populate the menu's below the dropdown list, (perhaps including sliders)?
> (Rather than having to manually enter the various default values.)

Yes, for that use a <select> element, it's this part in LineWeb.htm :

			<table>
				<tr>
					<td>Build:</td>
					<td>
						<select id="Build">
							<option value="lines">Lines</option>
							<option value="polylines">Polylines</option>
							<option value="curves">Curves</option>
							<option value="points">Points</option>
						</select>
					</td>
				</tr>
			</table>

If you give the select element an id value then when it is changed it will generate a UI event of that name in the script's event loop.

Or you can also put in script code in the .htm file using an onchange="" handler, something like:

        <select id="Build" onchange="moi.ui.alert( 'changed' );">

Let me know if you're still stuck on this part.

- Michael

Hi Burr,
the link to the script discussion http://moi3d.com/forum/index.php?webtag=MOI&msg=4489.1
Attached the script.
Cheers
Barry

Hi Barry,

It should be possible to make the full profile, with the vertical tangents. I'll have a look later

- Brian

Barry,
Here is a revised version of the 10 year old EggHalf script, renamed EggHalf2021.
It is a full closed profile, with two vertical tangents.

- Brian

Hi Brian,
many thanks perfect.
It's a funny coincidence that I have been using the old script in the last few days and then you have produced a new one with more versatility (spooky).
There's a slight difference with the old script shape that I can't just replicate with the new script thus the request for the update.
Anyway again many thanks.
Barry

Thank you Michael for your help.
The (auto) populate input fields from dropdown selection is still vary murky.
I looked up a bunch of posts about "populate input fields based upon dropdown html", but they are very difficult to follow.

<select id = "Build" onchange = "moi.ui.populateinputs('????');">
// where populateinputs is a javascript function in <script> section </script.>

The 4+ parameter values will be in a 2d array or list, indexed by the dropdown selection. Each row can be for one species of animal.
Look up the 4+ values for the selected animal. They vary for different animals.
aSlider.value = 1.2;
bSlider.value = 0.42;
etc.
Then set the different Sliders, which have binding to input fields,
(or to inputs aValue, bValue, etc.)

moi.ui.fireUIEvent("aSlider");
moi.ui.fireUIEvent("bSlider"); etc.
Or moi.ui.fireUIEvent('aValue")...

- Brian
(I've started a new script with some biological curves and structures...
It has 12 input fields plus some 3 more boxes, plus 10 buttons to become a dropdown select,
which will take up a lot of screen space...)

Hi Brian, check out this modified version of your EggOvoid2 that has the type of dropdown set up like I think you're looking for.

In the .htm file I added a <select> element like this:

			<table>
				<tr>
					<td>Preset:</td>
					<td>
						<select id="Preset">
							<option value="Chicken">Chicken</option>
							<option value="Roc">Roc</option>
							<option value="Alligator">Alligator</option>
						</select>
					</td>
				</tr>
			</table>	

Then the easiest way to make it do something will be to do it in the event loop in the .js file. If it were only going to be modifying UI values and not generating geometry then it could go in an onchange="" handler on the <select> tag. But you probably want it to call Update() in your .js file when it is changed and that will be easier to call from your .js file.

So inside _EggOvoid2.js I added a function UpdatePreset() that gets the current value of the dropdown and sets the values of the other controls.

Then in the main DoEggOvoid() function, it calls UpdatePreset() on startup so the controls will be initialized to the value of the Preset dropdown when the command first starts up and then had it look for the 'Preset' UI event that will be generated when the dropdown is changed here:

		if ( dlg.event == 'LValue' || dlg.event == 'BValue' <....> || dlg.event == 'Preset')

And t hen just inside that:

			if ( dlg.event == 'Preset' )
			{
				UpdatePreset();
			}

So when the dropdown with id="Preset" is changed, it will generate UI event and the script event loop will see it and call UpdatePreset() which sets the values of the other fields and then do an Update().

Let me know if this wasn't what you meant.

- Michael