Guide on incorporating text onto objects with three.js

I successfully incorporated text into my shirt model using a text geometry. Check out the code below:

var canvas = document.getElementById('myCanvas');
var ctx = canvas.getContext('2d');
ctx.font = 'italic 18px Arial';
ctx.textAlign = 'center';
ctx. textBaseline = 'middle';
ctx.fillStyle = 'red'; 
ctx.fillText('Your Text', 150, 50);`

This is how the output appears:

https://i.sstatic.net/fq78R.png

The text is not fitting properly onto the shirt model. Even when I rotate the shirt model, the text appears in an odd manner. I aim to make the text fit seamlessly into the shirt model like this:

https://i.sstatic.net/YCUEz.png

Is there a way to adjust my dynamic text to fit correctly inside the shirt model using three.js?

Answer №1

Are you interested in fitting a 3D text inside a 3D object? Let me guide you through the process starting with the fundamental theory,

Picture a flag shaped like sin(2*pi) and your camera positioned along the y-axis (in Three.js coordinates). Now, imagine adding text that perfectly aligns with the sin(2*pi) function. Sound challenging?

https://i.sstatic.net/FoqoV.png

Here's the key concept - try obtaining tangent lines from the sin(x) function to cut the text into segments that match the tangents...

For instance, the text "Montiel Software" will be split into ["Mon","tiel","Soft","Ware"]

Flag:

function flag(u,v,vector)
{
var x = 10*u;
var y = 10*v;
var z = Math.sin(2*Math.PI*u) ;
vector.set(x,y,z);}

Create the Geometry:

var geometry_sin = new THREE.ParametricGeometry(flag, 100, 100);
var material_sin = new THREE.MeshPhongMaterial({map:groundTexture,side:THREE.DoubleSide, color:0x000000} );
var flag = new THREE.Mesh( geometry_sin, material_sin );

Now, add the text to the flag (choosing tangents) and then add the flag to the scene:

var loader = new THREE.FontLoader();
loader.load('js/examples/fonts/helvetiker_regular.typeface.json',function(font){
var geometry = new THREE.TextGeometry( 'Mon', {
        font: font,
        size: 1,
        height: 0.5,
        curveSegments: 12,
        bevelEnabled: false,
        bevelThickness: 0.1,
        bevelSize: 0.1,
        bevelSegments: 0.1
    } );
    var txt_mat = new THREE.MeshPhongMaterial({color:0xffffff});
    var txt_mesh = new THREE.Mesh(geometry, txt_mat);
    txt_mesh.position.z = 0.2;
    txt_mesh.position.y = 5;
    txt_mesh.rotation.y = -Math.PI/8;
    flag.add(txt_mesh);
    var geometry = new THREE.TextGeometry( 'tiel', {
        font: font,
        size: 1,
        height: 0.5,
        curveSegments: 12,
        bevelEnabled: false,
        bevelThickness: 0.1,
        bevelSize: 0.1,
        bevelSegments: 0.1
    } );
    var txt_mat = new THREE.MeshPhongMaterial({color:0xffffff});
    var txt_mesh = new THREE.Mesh(geometry, txt_mat);
    txt_mesh.position.z = 1.2;
    txt_mesh.position.x = 2.5;
    txt_mesh.position.y = 5;
    txt_mesh.rotation.y = Math.PI/12;
    flag.add(txt_mesh);
    var geometry = new THREE.TextGeometry( '$oft', {
        font: font,
        size: 1,
        height: 0.5,
        curveSegments: 12,
        bevelEnabled: false,
        bevelThickness: 0.1,
        bevelSize: 0.1,
        bevelSegments: 0.1
    } );
    var txt_mat = new THREE.MeshPhongMaterial({color:0xffffff});
    var txt_mesh = new THREE.Mesh(geometry, txt_mat);
    txt_mesh.position.z = 0.28;
    txt_mesh.position.x = 4.5;
    txt_mesh.position.y = 5;
    txt_mesh.rotation.y = Math.PI/7;
    flag.add(txt_mesh);
    var geometry = new THREE.TextGeometry( 'Ware', {
        font: font,
        size: 1,
        height: 0.5,
        curveSegments: 12,
        bevelEnabled: false,
        bevelThickness: 0.1,
        bevelSize: 0.1,
        bevelSegments: 0.1
    } );
    var txt_mat = new THREE.MeshPhongMaterial({color:0xffffff});
    var txt_mesh = new THREE.Mesh(geometry, txt_mat);
    txt_mesh.position.z = -1;
    txt_mesh.position.x = 7;
    txt_mesh.position.y = 5;
    txt_mesh.rotation.y = -Math.PI/8;
    flag.add(txt_mesh);

} );
scene.add(flag);

This is the unique approach I have devised using Three.js. If you are simply looking to create a 3D object, I recommend utilizing 3D builder to explore different options and then import the object into Three.js.

Answer №2

If you're looking to improve the rendering of text on your 2D canvas, there are a few approaches you can try out.

  1. One option is to use textures loaded with the THREE.TextureLoader.
  • For examples, you can visit:
  • There's also a helpful tutorial here:
  1. Another approach is to use THREE.TextGeometry.
  • Check out an example here:
  1. You could also explore a CSS3D solution for rendering text.
  • Here's an example:

Don't forget to take a look at the UI example on the THREE.TextGeometry documentation page:

https://i.sstatic.net/AkHIl.png

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