Write GlTF materials in header. A material contains a base color, a roughness factor and a metallic factor. It can also contains a base color texture (index of a texture image) if the material is textured. The material follows the GlTF material definition.
This PR will allow to write 3DTiles with color. All the geometries in a tile will have a RGB color or a texture. Different geometries from the same tile can have different materials.
Write GlTF materials in header. A material contains a base color, a roughness factor and a metallic factor. It can also contains a base color texture (index of a texture image) if the material is textured. The material follows the GlTF material definition.
This PR will allow to write 3DTiles with color. All the geometries in a tile will have a RGB color or a texture. Different geometries from the same tile can have different materials.