public static MeshPrimitive WithIndicesAutomatic(this MeshPrimitive primitive, PrimitiveType primitiveType)
{
var root = primitive.LogicalParent.LogicalParent;
primitive.DrawPrimitiveType = primitiveType;
primitive.SetIndexAccessor(null);
return(primitive);
}
public static MeshPrimitive WithIndicesAccessor(this MeshPrimitive primitive, PrimitiveType primitiveType, MemoryAccessor memAccessor)
{
Guard.NotNull(primitive, nameof(primitive));
var root = primitive.LogicalParent.LogicalParent;
var accessor = root.CreateAccessor();
accessor.SetIndexData(memAccessor);
primitive.DrawPrimitiveType = primitiveType;
primitive.SetIndexAccessor(accessor);
return(primitive);
}
public static MeshPrimitive WithIndicesAccessor(this MeshPrimitive primitive, PrimitiveType primitiveType, IReadOnlyList <Int32> values)
{
var root = primitive.LogicalParent.LogicalParent;
// create an index buffer and fill it
var view = root.UseBufferView(new Byte[4 * values.Count], 0, null, 0, BufferMode.ELEMENT_ARRAY_BUFFER);
var array = new IntegerArray(view.Content);
array.FillFrom(0, values);
var accessor = root.CreateAccessor();
accessor.SetIndexData(view, 0, values.Count, IndexEncodingType.UNSIGNED_INT);
primitive.DrawPrimitiveType = primitiveType;
primitive.SetIndexAccessor(accessor);
return(primitive);
}