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README.md
Simple Property Texture
This sample demonstrates usage of the EXT_structural_metadata extension for storing properties associated with the surface of a primitive, using a property texture.
The sample contains a glTF asset with a single mesh primitive. The mesh primitive consists of a quad (the unit square), formed by 2 triangles. The vertices in this mesh primitive have the usual POSITION, NORMAL, and TEXCOORD_0 vertex attributes.
Metadata Structure
The metadata in this example consists of a single example class inside an EXT_structural_metadata schema. This class defines properties of a building facade, namely the insideTemperature, outsideTemperature, and an insulation thickness. These first two properties are given as UINT8 values, covering the range [0,255]. The insulation is given as a normalized UINT8 value, meaning that the raw values in the range [0,255] represent values in the range [0.0, 1.0].
The values for the class properties are stored in a property texture. The red, green, and blue channel of this texture stores the value for the insideTemperature, outsideTemperature, and insulation, respectively.