EXT_text

Contributors

• Diego F. Goberna, Embark Studios, @feiss
• Takahiro Aoyagi, Mozilla, @takahirox

Status

Draft

Dependencies

Written against the glTF 2.0 spec.

Overview

If you want to 3D text data in a glTF, you need text geometry data in it. 3D text geometry data is expensive and can increase the file size a lot. This EXT_text extension allows to easily and inexpensively 3D text data.

Example screenshot

Defining Texts

"extensions": {
    "EXT_text": {
        "texts": [
            {
                "text": "Hello glTF!",
                "fonts": ["Arial", "Times New Roman"],
                "size": 1.0,
                "color": [1.0, 1.0, 1.0, 1.0]
            }
        ]
    }
}

Adding Text instances to Nodes

"nodes": [
    {
        "extensions": {
            "EXT_text": {
                "text": 0
            }
        }
    }
]

Text Types

Property	Type	Description	Requires
text	string	Text content	✅ Yes
fonts	string [1-*]		No
color	number [4]	Text's RGBA font color	No, default: [0,0,0,1]
size	number		No, default: 1.0

Implementation Note

T.B.D.