public IVertex SetUv(int uvIndex, ITexCoord?uv)
{
if (uv != null)
{
this.Uvs ??= new SparseVertexAttributeArray <ITexCoord>();
this.Uvs[uvIndex] = uv;
}
else
{
this.Uvs?.Set(uvIndex, null);
if (this.Uvs?.Count == 0)
{
this.Uvs = null;
}
}
return(this);
}
public IVertex SetColor(int colorIndex, IColor?color)
{
if (color != null)
{
this.Colors ??= new SparseVertexAttributeArray <IColor>();
this.Colors[colorIndex] = color;
}
else
{
this.Colors?.Set(colorIndex, null);
if (this.Colors?.Count == 0)
{
this.Colors = null;
}
}
return(this);
}