func addChild(node *xmlx.Node, name string, attribs Attribs, contents string) *xmlx.Node {
child := xmlx.NewNode(xmlx.NT_ELEMENT)
child.Name.Local = name
child.Value = contents
for key, val := range attribs {
child.SetAttr(key, fmt.Sprintf("%v", val))
}
node.AddChild(child)
return child
}
func Export(object export.Exportable) error {
outFile := fmt.Sprintf("%v.dae", object.GetName())
ctx := Context{
Object: xmlx.New(),
imageIds: make(map[string]string),
}
ctx.Object.Root = xmlx.NewNode(xmlx.NT_ROOT)
root := ctx.Object.Root
collada := addChild(root, "COLLADA",
Attribs{"xmlns": "http://www.collada.org/2005/11/COLLADASchema", "version": "1.4.1"}, "")
asset := addChild(collada, "asset", nil, "")
_ = addChild(asset, "unit", Attribs{"meter": "1", "name": "meter"}, "")
_ = addChild(asset, "up_axis", nil, "Y_UP")
ctx.libImages = addChild(collada, "library_images", nil, "")
ctx.libMaterials = addChild(collada, "library_materials", nil, "")
ctx.libEffects = addChild(collada, "library_effects", nil, "")
ctx.libGeometries = addChild(collada, "library_geometries", nil, "")
ctx.libScenes = addChild(collada, "library_visual_scenes", nil, "")
ctx.scene = addChild(ctx.libScenes, "visual_scene", Attribs{"id": "Scene",
"name": object.GetName()}, "")
scenes := addChild(collada, "scene", nil, "")
_ = addChild(scenes, "instance_visual_scene", Attribs{"url": "#Scene"}, "")
for _, model := range object.GetModels() {
var err error
if err = ExportMaterials(&ctx, model); err != nil {
return err
}
if err = ExportGeometries(&ctx, model); err != nil {
return err
}
}
if err := ctx.Object.SaveFile(outFile); err != nil {
return err
}
return nil
}