We will create a very simple counter using Geometry Nodes in Blender. You can animate the counting however you like.

Let's get started. If you are looking at Geometry Nodes for the first time,
it may seem a little difficult.

To put it simply, it is an add-on with a specific function.
You can think of it as making it step-by-step.

Next, I will outline today's tutorial. Even if it looks complicated, follow along slowly. You will see the completed Geometry Node.

First, create numeric text with the String to Curve node. Create a face on the curve. Use the Extrude Mesh node to create thickness on the object.

But you can't see the face on the back, right? Adding a back face creates a more realistic 3D text.

You can add two materials. Set green for the extruded part and black for the back face.

All you have to do is duplicate the front face one more time. Geometry Nodes can be easily animated using modifier properties.

It's not difficult. Let's look at it one by one from the beginning. Change the workspace to Geometry Nodes.

First, you need to select one or more objects. Aside from cameras and lights, choose from Mesh, Curve, and Text objects.

Select a Cube and click + New! Group Input and Group Output. Two nodes have been created. These two nodes are the most important basic nodes.

You can also see Geometry Nodes in the Modifier Properties. Let's merge the viewport to make it wider.

Add a node for numeric text. Add and drag (Shift + A) a String to Curves node.

The connection to the left Group Input node has disappeared. The reason the connection is lost is that the types of sockets do not match.

The round shape is called a socket. You can tell the type by the color of the socket.

The left and right sides are different colors. You can directly insert text into the string part. You can check it on the viewport.

0 1 2 3 4... Converts to numbers. You can also change the font.

The "esamanru" font is one of my favorite free fonts. If you look at [More], there is a font link.

Change the alignment of the text to center. But the numbers are lying on the floor. Let's rotate them.

Shift + A / Add a Transform Geometry node, and drag to connect. The sockets are automatically connected.

You can edit the XYZ position and rotation. Rotation X axis 90 degrees / The text stands upright.

If we render now, nothing comes out. We need to create a mesh face on the curve.

Add a Fill Curve node. If you check, a face has been created on the curve. To create a 3D object, add an Extrude Mesh node.

You can adjust the extrusion value using the offset scale value. Your 3D text is complete.

It's important from now on. To count numbers, you need an integer instead of a string.

Currently, it is a string (character) type. It is similar to processing numbers and strings differently in program coding or Excel.

Group input plays an important role here. (You can create sockets by type) Select the Group Input node and use the shortcut key N.

Interface to create additional sockets. + / input / Select the type as integer. Double-click the socket name and edit it as 'counter value'.

A socket has been added to the group input node. You can also check the added counter value in modifier properties.

Connect the nodes. The red one is incorrectly connected. The colors on the left and right are different.

The left one is Integer, and the right one is String type. To connect two sockets of different types, a gender node is needed in the middle.

Shift + A / Add a Value to String node. The Value to String node changes a Value (number) to a String (character).

Now, when you modify a numeric value in the modifier properties, the geometry number is counted. Let me show you one more time.

Adding the offset scale value of the Extrude Mesh node to the Group input socket. In the interface of the group input node, the + / input

socket name is 'extrude offset'. Offset Scale value requires a decimal point, so select Float as the Type.

Connect the nodes. Now you can easily modify the extrude offset value. Did you understand? Let's rotate the viewport.

Can't you see the face on the back? There is a hole. The Extrude Mesh node cannot fill this hole.

A back face must be created. Add a Join Geometry node and connect it. Connect the face at the origin location to the Join Geometry node.

Now the back face has been created. Let's set the material. Add a Set Material node.

We will use two materials with different colors. Change the Workspace to Shading. Create a green material and modify the Emission value. The name is 'green'.

And we also make a black material. I made two materials, green and black. We come back to Geometry Nodes.

Select the green material in the Set Material node. The black material will be used for the back face.

Select the Set Material node and Shift + D / duplicate it. Connect the nodes and select black.

If you rotate it, two materials are set. I also want to make the front face black.

Now the last step, END GAME. Don't give up. Create a Set Position node. The number of nodes can be reduced by connecting it with the Set Material node

The front face position can be adjusted using the Offset Z value of the Set Position node. The value just needs to be slightly larger than the offset scale value of the Extrude Mesh node.

Add a math node for addition. The default function is Add. Connect the extrude offset socket to the first value.

Enter 0.001 in the second value. Then it becomes + 0.001. When you connect a socket directly, you will get unwanted results because the two socket types are different.

Once again, you need a compatible node. In Blender, the vector type has three component values.

Here, Translation, Rotation, and Scale are representative vectors. Add a Combine XYZ node. Connect the value to the Z value and connect the vectors to complete.

You see why we need the Combine XYZ node, right? Now you can freely animate the number counting and extrude (thickness) in the modifier properties.

Let's do a counting animation. Start frame: 0 frames. Set the Play Head at 0 frames.

Counter value: 0 / set the keyframe. End frame: 100. Set the Play Head at 100 frames.

Counter value: 100 / set the keyframe. When you play, it counts from 0 to 100. Okay.

Animate the extrude offset value in the same way. The counting animation is complete using geometry nodes.

Now, I'll show you how to import the geometry node you just created into a new file.

Rename the node tree to 'counting'. Save the Blender file. Create a geometry node in the new file.

File / Append. Double-click the Blender file you just saved. Double-click the Node Tree folder. Select 'counting'.

You can load 'counting' from Append Geometry Nodes. We imported geometry nodes. Did you like today's tutorial?

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