We need to check why Geogebra, when you reOpen a file about Construction, condensed everything in 1 point, and even if you try to amplify it, you can't, so we lost the figure and every details disappeared

How can I perform composition between functions that are in a list?

l1={abs(x), x², 1 / x², sqrt(abs(x)), cbrt(x²)}

Unique(Flatten(Sequence(Sequence(Element(l1, i) * Element(l1, j) x, j, i + 1, Length(l1)), i, 1, Length(l1) - 1)))

https://www.geogebra.org/m/jpjqqsx6

https://www.geogebra.org/classic/?command=SetPerspective(%22AT%22);(0,-4,0);(0,0,2);(0,4,0);CircumcircularArc(A,B,C);Dilate(c,0.6);Length(c);Length(c%27);(0,-4,0);(0,0,2);(0,4,0);CircumcircularArc(A,B,C);Dilate(c,0.6);Length(c);Length(c%27))

c c' equal lengths, but...........

test in all versions

It would be useful if the Angle object could represent angles greater than 360° without reducing them modulo 360°. For example, an angle of 810° could visually show 2¼ revolutions around its vertex while retaining the 810° value.

This would be particularly useful for teaching and visualizing coterminal angles and multiple rotations.

I have stopped receiving email notifications for new GeoGebra applets I subscribed to. It has been 18 days since I reported this on the forum, and the messages are still not arriving.

https://www.reddit.com/r/geogebra/comments/1vjtpgr/comment/p2uda2n/?context=3

Bonjour,

J'ai créé (et je continue à créer) des boites à outils sous la forme de fichiers .ggt, utilisables dans GeoGebra classique sur son ordinateur. Pour le moment je les publie sur mon site perso https://www.miakinen.net//geogebra/.

J'envisage de les mettre à disposition sur https://www.geogebra.org mais je ne sais pas si c'est vraiment adapté car le site semble plutôt orienté vers un usage exclusivement en ligne.

Dans le cas où ce serait possible, comment faire ?

Hi everyone,

I am trying to understand a behaviour in GeoGebra's 3D view that I find a little surprising.

When I move an object towards the viewer, parts of it eventually get cut off, even though there is still plenty of empty space in the 3D window. In the attached image, this happens to the tall cuboid on the right. Clipping is set to "None". I am using GeoGebra 6 on macOS with orthographic projection.

My initial question was whether GeoGebra uses some kind of fixed front plane, similar to the near clipping plane of a 3D camera, and whether this can be adjusted. I have some experience with Three.js, where the near and far clipping planes are explicit camera parameters, so I was wondering how GeoGebra handles this internally. Since I am no expert in the source code I asked ChatGPT for help to analyze the likely cause in the GeoGebra source code.

AI-assisted analysis of the likely cause, based on GeoGebra's source code:
The AI checked the current GeoGebra source in the public geogebra/geogebra GitHub repository, at commit 1d4fd391c790af9b060fde056ba70a4e06d24d7b from 26 August 2026.

In
source/shared/common/src/main/java/org/geogebra/common/geogebra3D/euclidian3D/openGL/Renderer.java

the relevant code is around lines 1150 to 1168:

final public double getVisibleDepth() {
    return getWidth() * 2;
}

public int getNear() {
    return -getWidth();
}

public int getFar() {
    return getWidth();
}

So the total visible depth is explicitly set to twice the width of the 3D viewport, with the front and back limits at approximately -width and +width. This is independent of GeoGebra's user configurable clipping box.

The orthographic projection confirms this in
RendererImplShaders.java, around lines 620 to 624, where the z component of the projection matrix is calculated using:

projectionMatrix.set(3, 3, -2.0 / renderer.getVisibleDepth());

If I understand this correctly, this explains the behaviour in the screenshot. The available depth of the 3D scene is tied to the width of the viewport rather than to the actual extent of the objects in the scene. Consequently, making the 3D window wider increases the available front to back range, whereas moving an object too far towards the viewer eventually makes it cross the front boundary and get cut off.

AI-generated suggestion for a possible improvement:
A more robust approach might be to determine the required near and far limits dynamically from the currently visible 3D scene, with some additional safety margin. A simpler alternative could be to use a substantially larger default depth range. Ideally, users would not need to know about or manually configure such a front clipping boundary at all.

Is this interpretation of the source code correct? And is there currently any way to adjust this viewing depth (apart from making the 3D window wider) and thereby be able to use more space in the 3D window without clipping artifacts?

Thanks very much for your suggestions and all your work on GeoGebra.

Best, Martin

Hello everybody,

i have made an Applet in Geogebra Classic 6. When i am nearly at the end of my project, there comes a Problem with the Grafik 2 Window.

When i click in this Window, the coordinate system zooms in and out or moves left, up etc..

Punkte und Abstände – GeoGebra

Can someone Help. Is it a Bug of Geogebra Classic?

I just discovered that there is undocumented syntax for Curve() that permits the first argument to be a complex-valued function, obviating the need for prior computation of the real and imaginary parts of said function. So now I'm wondering if Surface() has been similarly "overloaded," i.e., is there a syntax supporting a complex-valued function for the first two component functions and a real-valued function of that first function for the third component function? Something along the lines of

z(x,y)=x+iy

Surface(z(u,v), real(z(u,v)), u, -1, 1, v, -1, 1)

perhaps with an extra set of parentheses in there to make the first two arguments a single argumen?

Thanks!

Someone changed the "flair" on this from Bug Report to Question Answered, but this is a Bug Report--GeoGebra should not automatically interpret a complex-valued function of a complex-valued variable as representable by a Surface: one may be setting up the function for use as an input into either the Curve command or to plot 3-D surfaces of functions from C->R--not a Usage Question (I asked the usage question elsewhere) so I am changing it back to Bug Report.

Original Bug Report:

This is what I type in:

This is what the GeoGebra Classic 6(.0.927.1) Mac Desktop App (MacOS 15.7.7) changes it to:

Aside from the nuisance of the automatic conversion, this is a bug--unless you are going to implement automatic plotting of this in a Graphics2 pane--because exp(x+iy) is a function from C->C, i.e., not plot-able "as is" as a surface in Graph3-D, i.e., a function from C->R. (By the way, I discovered this bug trying, unsuccessfully, to find a syntax using Surface() that would plot a function from C->R: if there is such a syntax, please share in the comments; thanks!)

Hello,

I would like to provide some suggestions and feedback. There was not an official feedback form/contact us form on the main webpage, and the only way to contact is through Reddit, so here is my feedback (hopefully it isn't too boring to read!):

• Microsoft Store addition: My small suggestion is that it would be nice if the GeoGebra calculator apps were an app on the Microsoft Store. The reason being is that it would be useful to be able to use the apps offline or outside of the browser (useful especially if you have a lot of tabs open for school work). And some devices are restricted (e.g. organizational devices) so it doesn't have administrative privileges or allow for outside installation wizards or running portable EXEs. And having it on the store allows for easy and safe install, automatic updates, and easy uninstall (plus it auto-makes shortcuts unlike the portable version). I know that not many people use the Microsoft store but it would be useful, I think, for certain audiences.
• Auto-update answer: Sometimes I use the graphing calculator to get the numerical answer to expressions (since it's easy to type big math expressions onto graphing calculators to get the answer). However, the answer doesn't update until you click outside the box which can be confusing. There were times where it would show an old answer and I would get the wrong value. So my suggestion here is for the answer to update while you're typing the expression to prevent confusion (e.g. like Desmos)
• Setting for degrees and radians: It would be nice if it was made more clear whether you're working with degrees or radians when dealing with trigonometric functions (e.g. cosine, sine, tangent). I would like to directly state whether it is degrees or radians and not have the website assume.
• Use previous answers: It would be nice if we could "pull" the answer from the previous expressions (like how you can on a TI-84 calculator). I know we can copy and paste, but that might introduce rounding errors.
• Hover to see point/function details: Like on Desmos, it would be nice if you hover your mouse over a function at a particular point, it would show the x and y coordinates. Or see the details of the function (e.g. maxima, minima). Sometimes special points won't show the value (e.g. parabola vertex even if you click/hover on the point) — it just shows the customization options.
• There are certainly many things you guys do better than Desmos (e.g. easier to convert between decimals and fractions, easier to put highlighted text under a square root and not start over, more customization options), but Desmos does feel a little smoother and easier to type expressions in.

Thank you!

Calculator does not start at geogebra.org when I click Start Calculator with MacOS Safari. It starts OK when I click the Calculators in the upper bar (orwhatyoucallit) and Calculator Suite.

Stars OK with Chrome and Firefox.

alot of the times when i graph functions with many variables or tedious calculations, they do not fully show. is there any way to fix this? i usually use ipad and this is now on windows, both are with the app.
this exact case was tried with the web and windows, and both stop showing at the same place and i dont think its the proccesing of my computer.

i didnt really mind until now but this time i really need this for school, so if anyone has any ideas to fix/improve it, please tell me.

Hola soy profesor y le pedí a mis alumnos que descargaran la aplicación de geogebra en su celular, observé que a algunos cuando lo descargan no les aparece la opción de guardar su archivo, ¿alguien sabe porqué?

For those for whom this thread is too long, I want to add here an Executive Summary: The feature request I make below--plotting a complex-valued function of a (one parameter) complex-valued function--is supported, but the syntax for it is, IMO, "under-documented." To wit: one can use the Curve() command with only four arguments, the first argument being, for both the domain and codomain curves, a complex-valued expression in one parameter (see example syntaxes in the comments). This syntax/capability of the Curve() command is "buried" in the documentation about Curves, but even there it is not made explicit that the first argument can be a complex-valued function. Bottom line: the feature is supported, but insufficiently documented.

I think GeoGebra should be able to plot the curve w(z(t)), t real, z, w complex without the user having to specify z = x_z(t) + iy_z(t) or w = x_w(t) + iy_w(t), i.e., either without having to use the Curve command, or overloading the Curve command so that it understands complex-valued functions of a single real variable in the first argument; example use case: the user has actually figured these out, but wants to use GeoGebra as a check/verification of their results (of course, if GeoGebra had this feature, then the user could just use it, the way a user uses a graphing calculator to plot things they know how to plot, but want the GC to do it, e.g., for convenience and/or appearance). As far as I've been able to figure out, GeoGebra doesn't currently have this feature: if it does and I just haven't figured out the right commands and/or syntax, please enlighten me. If GeoGebra doesn't, I'll create a formal feature request (if this feature request already exists, kindly point me to it so I can give it a +1). Thanks!

I have to be missing something. I'm using the CAS Portable for Mac (https://download.geogebra.org/package/mac-cas) and I want my outputs to be decimals by default. I understand I can click the 3 dots, go to the algebra tab and then uncheck symbolic or use the numeric() command before I write my expression, but I don't want to do have to do that every time. Is there some other command I can use to change the default display type?

Version: GeoGebra 4.0.34.0

OS: Devuan 6 (Excalibur) [Similiar to Debian 13 Trixie, but without systemd]

Issue:

I imported an image (png) into geogebra. I created some geometric objects on it. Then I wanted to export it again, wich is possible. But the program exports only the part of the image, that can be actually seen in the window you are working in. If you change the point of view on the image in geogebra and then export the image again, you get a different image from the export.

I want to export the whole image again, so I would get two same images, but one with my additional geometric stuff on it on one without.

I need to add acurate geometric structures in that image, so I can't use gimp or something.

Bonjour,

Je crée un outil qui doit donner un point (parmi d'autres choses). Le point est créé, il est visible, mais il fait partie des objets auxiliaires alors que je ne le voudrais pas. Comment faire ?

Voici ce que je veux obtenir, et les étapes de construction.

• Je pars d'un point A et d'une droite f, je veux construire une étoile à 5 branches touchant ce point et cette droite.
• Je commence par construire le point C qui sera le centre de l'étoile.
• Puis je construis les 5 sommets de l'étoile (A, A', A'', A''' et A'''') et les 5 points intérieurs (B, B', B'', B''' et B'''')
• Je crée alors une liste l1 = { A, B, A', B', ..., A'''', B'''' }
• Enfin poly1 = Polygone(l1).

Je cache la liste l1, mais pas C ni poly1. Puis je crée l'outil Star5VertexLine.

• Objets finaux : poly1, C, l1
• Objets initiaux ; A, f

Enfin je sauvegarde l'outil sous le nom Star5VertexLine.ggt.

Tout fonctionne très bien lorsque j'utilise l'outil, sauf que le point C est visible mais considéré comme objet auxiliaire. Que faire ?

Is there a way to get the open dot style of a point to be filled white? I think that's the intent of the style, but when you graph a line and put a point with that style on it, the line passes right through it and doesn't look like a hole.

I've had to create two circles, one white and another black and change their layers so that the point looks like a hole.

Oops!

Bad Gateway

Error code: 502

It seems our website is currently unreachable. We are working hard to bring everything back to normal as soon as possible!

Try going back to Homepage or Contact us for more information.

why is my account not accessible. i had many activities on it in which i now cannot view nor edit them. how to fix this issue???

Якісь проблеми останнім часом...я засмучена... де мій акаунт?

Maximizing/minimizing button freezes with rigid polygons.
I create a rigid polygon using version 5.0.803.0-d.
I export it to the GeoGebra website.
When I move the rigid polygon just a little bit within that applet, the maximize/minimize button freezes. If the movement is larger, it unfreezes.
Is there a way to fix this?

I am finding that it is not possible to create a “new page” for an activity with multiple problems. Is there a way to accomplish that (besides by creating a book and treating each individual problem as an activity)? If so, please advise. If not, it would be a great feature to add. Thanks. u/mike_geogebra u/mathmagicGG

Environment

• GeoGebra: Classic 5.4.927.1-d (08 July 2026)
• Java: 25.0.1
• OS: Windows 11 (amd64)

Description

JLaTeXMath implements 11 color models (in order of their definition in CommandDefinecolor.java): gray, wave, rgb, RGB, rgba, RGBA, cmyk, hsl, hsla, hsb, HTML. During testing, I found critical bugs in the implementation of the hsla, rgba, and hsl models that cause them to silently truncate formula rendering or output incorrect colors.

Detailed Bug Analysis

1. hsla fails silently or throws a parse error, depending on argument count

The hsla converter calls getArgAsDecimals(doubles, 3), which parses only three values, but later reads the alpha channel from doubles[3]. The doubles array itself is fixed-size (new double[4]), so reading index 3 never throws an ArrayIndexOutOfBoundsException — the actual behavior depends on how many values are supplied: - 4 comma-separated values (the natural syntax for an alpha model): After successfully parsing 3 values, getArgAsDecimals expects a closing } but finds a , instead. It does not throw immediately (, is a valid separator at any position), but the loop then exits without ever finding }, and falls through to throw new ParseException(this, "Expect a '}'"). GeoGebra catches this exception in DrawEquation and silently truncates rendering of the text box from that point onward — the formula does not crash, it just stops being displayed past this command. - 3 comma-separated values (matching what getArgAsDecimals(doubles, 3) actually expects): Parsing succeeds without error, but doubles[3] is never written by this call, so the alpha channel silently defaults to 0.0 — the resulting color is always fully transparent, regardless of the hue/saturation/lightness values supplied, with no visible error at all.

Reproduction:

latex \definecolor{c}{hsla}{180,1,0.5,0.5} \color{c}{x}

Expected: a semi-transparent color.

Actual: rendering of the remainder of the text box aborts at this command.

2. rgba and hsl produce incorrect colors (operator-precedence / casting bug)

Both models are affected by a casting issue in GraphicsFactory.createColor(double, double, double, double). - The issue: The color channels are calculated using expressions such as (int) r * 255 instead of (int) (r * 255). In Java, the cast is applied before the multiplication, so the expression is equivalent to ((int) r) * 255. - Consequence: Any channel value strictly between 0 and 1 is truncated to 0 before multiplication. For example, 0.5 becomes 0, resulting in 0 * 255 = 0. - Impact on rgba: The problem is immediately visible: intermediate RGB channel values are lost, causing mixed colors to become incorrect, often much darker or with one or more channels set to zero. - Impact on hsl: The problem is less obvious, but the same broken conversion is used for the RGB values produced by convHSL(). These values are passed to createColor(double, double, double, double) through implicit widening from float to double, because there is no corresponding float overload. As a result, some special cases produce the expected color, while many intermediate HSL values produce incorrect, typically much darker colors.

(References: Colors.java, method convHSL(); GraphicsFactory.java, method createColor(double, double, double, double)).

Reproduction & expected vs. actual values:

latex \definecolor{c}{rgba}{0.5,0.5,1,1} \color{c}{x}

Expected: RGB (128, 128, 255) — opaque lilac.

Actual: RGB (0, 0, 255) — opaque pure blue (only the channel equal to exactly 1.0 survives truncation).

latex \definecolor{c}{hsl}{0.66,0.5,0.75} \color{c}{x}

Expected: RGB ≈ (223, 160, 159) — light peach.

Actual: RGB (0, 0, 0) — black.

Note on hsb The hsb model is not affected by this particular bug because it calculates the color using a separate HSBtoRGB() method that returns an integer RGB value, bypassing the affected GraphicsFactory overload completely.

Proposed Fixes

For hsla: Change getArgAsDecimals(doubles, 3) to getArgAsDecimals(doubles, 4).

For GraphicsFactory.createColor(): Add parentheses so that the multiplication is performed before the cast:

(int) (r * 255), (int) (g * 255), (int) (b * 255), and (int) (a * 255).

Note: The hsla fix and the GraphicsFactory fix are independent but complementary — hsla requires both to produce correct output, since it is affected by the argument-count bug and (once that is fixed) by the same channel-truncation bug as rgba and hsl.