/*************************************************************************/
/*  resource_importer_scene.cpp                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "resource_importer_scene.h"

#include "scene/resources/packed_scene.h"
#include "io/resource_saver.h"
#include "editor/editor_node.h"

#include "scene/3d/mesh_instance.h"
#include "scene/3d/navigation.h"
#include "scene/3d/room_instance.h"
#include "scene/3d/body_shape.h"
#include "scene/3d/physics_body.h"
#include "scene/3d/portal.h"
#include "scene/3d/vehicle_body.h"
#include "scene/resources/sphere_shape.h"
#include "scene/resources/box_shape.h"
#include "scene/resources/ray_shape.h"
#include "scene/resources/plane_shape.h"


void EditorScenePostImport::_bind_methods() {

	BIND_VMETHOD( MethodInfo("post_import",PropertyInfo(Variant::OBJECT,"scene")) );

}

Node *EditorScenePostImport::post_import(Node* p_scene) {

	if (get_script_instance())
		return get_script_instance()->call("post_import",p_scene);

	return p_scene;
}

EditorScenePostImport::EditorScenePostImport() {


}


String ResourceImporterScene::get_importer_name() const {

	return "scene";
}

String ResourceImporterScene::get_visible_name() const{

	return "Scene";
}

void ResourceImporterScene::get_recognized_extensions(List<String> *p_extensions) const{

	for (Set< Ref<EditorSceneImporter> >::Element *E=importers.front();E;E=E->next()) {
		E->get()->get_extensions(p_extensions);
	}
}

String ResourceImporterScene::get_save_extension() const {
	return "scn";
}

String ResourceImporterScene::get_resource_type() const{

	return "PackedScene";
}

bool ResourceImporterScene::get_option_visibility(const String& p_option,const Map<StringName,Variant>& p_options) const {

	if (p_option.begins_with("animation/")) {
		if (p_option!="animation/import" && !bool(p_options["animation/import"]))
			return false;

		if (p_option.begins_with("animation/optimizer/") && p_option!="animation/optimizer/enabled" && !bool(p_options["animation/optimizer/enabled"]))
			return false;

		if (p_option.begins_with("animation/clip_")) {
			int max_clip = p_options["animation/clips/amount"];
			int clip = p_option.get_slice("/",1).get_slice("_",1).to_int()-1;
			if (clip>=max_clip)
				return false;
		}
	}

	return true;

}

int ResourceImporterScene::get_preset_count() const {
	return 0;
}
String ResourceImporterScene::get_preset_name(int p_idx) const {

	return "";
}


static bool _teststr(const String& p_what,const String& p_str) {

	if (p_what.findn("$"+p_str)!=-1) //blender and other stuff
		return true;
	if (p_what.to_lower().ends_with("-"+p_str)) //collada only supports "_" and "-" besides letters
		return true;
	if (p_what.to_lower().ends_with("_"+p_str)) //collada only supports "_" and "-" besides letters
		return true;
	return false;
}

static String _fixstr(const String& p_what,const String& p_str) {

	if (p_what.findn("$"+p_str)!=-1) //blender and other stuff
		return p_what.replace("$"+p_str,"");
	if (p_what.to_lower().ends_with("-"+p_str)) //collada only supports "_" and "-" besides letters
		return p_what.substr(0,p_what.length()-(p_str.length()+1));
	if (p_what.to_lower().ends_with("_"+p_str)) //collada only supports "_" and "-" besides letters
		return p_what.substr(0,p_what.length()-(p_str.length()+1));
	return p_what;
}


Node* ResourceImporterScene::_fix_node(Node *p_node,Node *p_root,Map<Ref<Mesh>,Ref<Shape> > &collision_map) {

	// children first..
	for(int i=0;i<p_node->get_child_count();i++) {


		Node *r = _fix_node(p_node->get_child(i),p_root,collision_map);
		if (!r) {
			print_line("was erased..");
			i--; //was erased
		}
	}

	String name = p_node->get_name();

	bool isroot = p_node==p_root;


	if (!isroot && _teststr(name,"noimp")) {

		memdelete(p_node);
		return NULL;
	}


	if (p_node->cast_to<MeshInstance>()) {

		MeshInstance *mi = p_node->cast_to<MeshInstance>();

		bool bb=false;

		if ((_teststr(name,"bb"))) {
			bb=true;
		} else if (mi->get_mesh().is_valid() && (_teststr(mi->get_mesh()->get_name(),"bb"))) {
			bb=true;

		}

		if (bb) {
			mi->set_flag(GeometryInstance::FLAG_BILLBOARD,true);
			if (mi->get_mesh().is_valid()) {

				Ref<Mesh> m = mi->get_mesh();
				for(int i=0;i<m->get_surface_count();i++) {

					Ref<FixedSpatialMaterial> fm = m->surface_get_material(i);
					if (fm.is_valid()) {
						//fm->set_flag(Material::FLAG_UNSHADED,true);
						//fm->set_flag(Material::FLAG_DOUBLE_SIDED,true);
						//fm->set_depth_draw_mode(Material::DEPTH_DRAW_NEVER);
						//fm->set_fixed_flag(FixedSpatialMaterial::FLAG_USE_ALPHA,true);
					}
				}
			}
		}
	}


	if (p_node->cast_to<MeshInstance>()) {

		MeshInstance *mi = p_node->cast_to<MeshInstance>();

		Ref<Mesh> m = mi->get_mesh();

		if (m.is_valid()) {

			for(int i=0;i<m->get_surface_count();i++) {

				Ref<FixedSpatialMaterial> mat = m->surface_get_material(i);
				if (!mat.is_valid())
					continue;

				if (_teststr(mat->get_name(),"alpha")) {

					mat->set_feature(FixedSpatialMaterial::FEATURE_TRANSPARENT,true);
					mat->set_name(_fixstr(mat->get_name(),"alpha"));
				}
				if (_teststr(mat->get_name(),"vcol")) {

					mat->set_flag(FixedSpatialMaterial::FLAG_ALBEDO_FROM_VERTEX_COLOR,true);
					mat->set_flag(FixedSpatialMaterial::FLAG_SRGB_VERTEX_COLOR,true);
					mat->set_name(_fixstr(mat->get_name(),"vcol"));
				}

			}
		}
	}

	if (p_node->cast_to<AnimationPlayer>()) {
		//remove animations referencing non-importable nodes
		AnimationPlayer *ap = p_node->cast_to<AnimationPlayer>();

		List<StringName> anims;
		ap->get_animation_list(&anims);
		for(List<StringName>::Element *E=anims.front();E;E=E->next()) {

			Ref<Animation> anim=ap->get_animation(E->get());
			ERR_CONTINUE(anim.is_null());
			for(int i=0;i<anim->get_track_count();i++) {
				NodePath path = anim->track_get_path(i);

				for(int j=0;j<path.get_name_count();j++) {
					String node = path.get_name(j);
					if (_teststr(node,"noimp")) {
						anim->remove_track(i);
						i--;
						break;
					}
				}
			}

		}
	}


	if (p_node->cast_to<MeshInstance>()) {

		MeshInstance *mi = p_node->cast_to<MeshInstance>();

		String str;

		if ((_teststr(name,"imp"))) {
			str=name;
		} else if (mi->get_mesh().is_valid() && (_teststr(mi->get_mesh()->get_name(),"imp"))) {
			str=mi->get_mesh()->get_name();

		}


		if (p_node->get_parent() && p_node->get_parent()->cast_to<MeshInstance>()) {
			MeshInstance *mi = p_node->cast_to<MeshInstance>();
			MeshInstance *mip = p_node->get_parent()->cast_to<MeshInstance>();
			String d=str.substr(str.find("imp")+3,str.length());
			if (d!="") {
				if ((d[0]<'0' || d[0]>'9'))
					d=d.substr(1,d.length());
				if (d.length() && d[0]>='0' && d[0]<='9') {
					float dist = d.to_double();
					mi->set_flag(GeometryInstance::FLAG_BILLBOARD,true);
					mi->set_flag(GeometryInstance::FLAG_BILLBOARD_FIX_Y,true);
					//mi->set_draw_range_begin(dist);
					//mi->set_draw_range_end(100000);

					//mip->set_draw_range_begin(0);
					//mip->set_draw_range_end(dist);

					if (mi->get_mesh().is_valid()) {

						Ref<Mesh> m = mi->get_mesh();
						for(int i=0;i<m->get_surface_count();i++) {

							Ref<FixedSpatialMaterial> fm = m->surface_get_material(i);
							if (fm.is_valid()) {
								//fm->set_flag(Material::FLAG_UNSHADED,true);
								//fm->set_flag(Material::FLAG_DOUBLE_SIDED,true);
								//fm->set_depth_draw_mode(Material::DEPTH_DRAW_NEVER);
								//fm->set_fixed_flag(FixedSpatialMaterial::FLAG_USE_ALPHA,true);
							}
						}
					}
				}
			}
		}
	}
#if 0
    if (p_flags&SCENE_FLAG_CREATE_LODS && p_node->cast_to<MeshInstance>()) {

	MeshInstance *mi = p_node->cast_to<MeshInstance>();

	String str;

	if ((_teststr(name,"lod"))) {
	    str=name;
	} else if (mi->get_mesh().is_valid() && (_teststr(mi->get_mesh()->get_name(),"lod"))) {
	    str=mi->get_mesh()->get_name();

	}


	if (p_node->get_parent() && p_node->get_parent()->cast_to<MeshInstance>()) {
	    MeshInstance *mi = p_node->cast_to<MeshInstance>();
	    MeshInstance *mip = p_node->get_parent()->cast_to<MeshInstance>();
	    String d=str.substr(str.find("lod")+3,str.length());
	    if (d!="") {
		if ((d[0]<'0' || d[0]>'9'))
		    d=d.substr(1,d.length());
		if (d.length() && d[0]>='0' && d[0]<='9') {
		    float dist = d.to_double();
		  ///  mi->set_draw_range_begin(dist);
		  //  mi->set_draw_range_end(100000);

		  //  mip->set_draw_range_begin(0);
		  //  mip->set_draw_range_end(dist);

		    /*if (mi->get_mesh().is_valid()) {

			Ref<Mesh> m = mi->get_mesh();
			for(int i=0;i<m->get_surface_count();i++) {

			    Ref<FixedSpatialMaterial> fm = m->surface_get_material(i);
			    if (fm.is_valid()) {
				fm->set_flag(Material::FLAG_UNSHADED,true);
				fm->set_flag(Material::FLAG_DOUBLE_SIDED,true);
				fm->set_hint(Material::HINT_NO_DEPTH_DRAW,true);
				fm->set_fixed_flag(FixedSpatialMaterial::FLAG_USE_ALPHA,true);
			    }
			}
		    }*/
		}
	    }
	}
    }


	if (p_flags&SCENE_FLAG_DETECT_LIGHTMAP_LAYER && _teststr(name,"lm") && p_node->cast_to<MeshInstance>()) {

		MeshInstance *mi = p_node->cast_to<MeshInstance>();

		String str=name;
		int layer = str.substr(str.find("lm")+3,str.length()).to_int();
		//mi->set_baked_light_texture_id(layer);
	}
#endif
	if (_teststr(name,"colonly")) {

		if (isroot)
			return p_node;

		if (p_node->cast_to<MeshInstance>()) {
			MeshInstance *mi = p_node->cast_to<MeshInstance>();
			Node * col = mi->create_trimesh_collision_node();
			ERR_FAIL_COND_V(!col,NULL);

			col->set_name(_fixstr(name,"colonly"));
			col->cast_to<Spatial>()->set_transform(mi->get_transform());
			p_node->replace_by(col);
			memdelete(p_node);
			p_node=col;

			StaticBody *sb = col->cast_to<StaticBody>();
			CollisionShape *colshape = memnew( CollisionShape);
			colshape->set_shape(sb->get_shape(0));
			colshape->set_name("shape");
			sb->add_child(colshape);
			colshape->set_owner(p_node->get_owner());
		} else if (p_node->has_meta("empty_draw_type")) {
			String empty_draw_type = String(p_node->get_meta("empty_draw_type"));
			print_line(empty_draw_type);
			StaticBody *sb = memnew( StaticBody);
			sb->set_name(_fixstr(name,"colonly"));
			sb->cast_to<Spatial>()->set_transform(p_node->cast_to<Spatial>()->get_transform());
			p_node->replace_by(sb);
			memdelete(p_node);
			CollisionShape *colshape = memnew( CollisionShape);
			if (empty_draw_type == "CUBE") {
				BoxShape *boxShape = memnew( BoxShape);
				boxShape->set_extents(Vector3(1, 1, 1));
				colshape->set_shape(boxShape);
				colshape->set_name("BoxShape");
			} else if (empty_draw_type == "SINGLE_ARROW") {
				RayShape *rayShape = memnew( RayShape);
				rayShape->set_length(1);
				colshape->set_shape(rayShape);
				colshape->set_name("RayShape");
				sb->cast_to<Spatial>()->rotate_x(Math_PI / 2);
			} else if (empty_draw_type == "IMAGE") {
				PlaneShape *planeShape = memnew( PlaneShape);
				colshape->set_shape(planeShape);
				colshape->set_name("PlaneShape");
			} else {
				SphereShape *sphereShape = memnew( SphereShape);
				sphereShape->set_radius(1);
				colshape->set_shape(sphereShape);
				colshape->set_name("SphereShape");
			}
			sb->add_child(colshape);
			colshape->set_owner(sb->get_owner());
		}

	} else if (_teststr(name,"rigid") && p_node->cast_to<MeshInstance>()) {

		if (isroot)
			return p_node;

		// get mesh instance and bounding box
		MeshInstance *mi = p_node->cast_to<MeshInstance>();
		Rect3 aabb = mi->get_aabb();

		// create a new rigid body collision node
		RigidBody * rigid_body = memnew( RigidBody );
		Node * col = rigid_body;
		ERR_FAIL_COND_V(!col,NULL);

		// remove node name postfix
		col->set_name(_fixstr(name,"rigid"));
		// get mesh instance xform matrix to the rigid body collision node
		col->cast_to<Spatial>()->set_transform(mi->get_transform());
		// save original node by duplicating it into a new instance and correcting the name
		Node * mesh = p_node->duplicate();
		mesh->set_name(_fixstr(name,"rigid"));
		// reset the xform matrix of the duplicated node so it can inherit parent node xform
		mesh->cast_to<Spatial>()->set_transform(Transform(Basis()));
		// reparent the new mesh node to the rigid body collision node
		p_node->add_child(mesh);
		mesh->set_owner(p_node->get_owner());
		// replace the original node with the rigid body collision node
		p_node->replace_by(col);
		memdelete(p_node);
		p_node=col;

		// create an alias for the rigid body collision node
		RigidBody *rb = col->cast_to<RigidBody>();
		// create a new Box collision shape and set the right extents
		Ref<BoxShape> shape = memnew( BoxShape );
		shape->set_extents(aabb.get_size() * 0.5);
		CollisionShape *colshape = memnew( CollisionShape);
		colshape->set_name("shape");
		colshape->set_shape(shape);
		// reparent the new collision shape to the rigid body collision node
		rb->add_child(colshape);
		colshape->set_owner(p_node->get_owner());

	} else if (_teststr(name,"col") && p_node->cast_to<MeshInstance>()) {


		MeshInstance *mi = p_node->cast_to<MeshInstance>();

		mi->set_name(_fixstr(name,"col"));
		Node *col= mi->create_trimesh_collision_node();
		ERR_FAIL_COND_V(!col,NULL);

		col->set_name("col");
		p_node->add_child(col);

		StaticBody *sb=col->cast_to<StaticBody>();
		CollisionShape *colshape = memnew( CollisionShape);
		colshape->set_shape(sb->get_shape(0));
		colshape->set_name("shape");
		col->add_child(colshape);
		colshape->set_owner(p_node->get_owner());
		sb->set_owner(p_node->get_owner());

	} else if (_teststr(name,"navmesh") && p_node->cast_to<MeshInstance>()) {

		if (isroot)
			return p_node;

		MeshInstance *mi = p_node->cast_to<MeshInstance>();

		Ref<Mesh> mesh=mi->get_mesh();
		ERR_FAIL_COND_V(mesh.is_null(),NULL);
		NavigationMeshInstance *nmi = memnew(  NavigationMeshInstance );


		nmi->set_name(_fixstr(name,"navmesh"));
		Ref<NavigationMesh> nmesh = memnew( NavigationMesh);
		nmesh->create_from_mesh(mesh);
		nmi->set_navigation_mesh(nmesh);
		nmi->cast_to<Spatial>()->set_transform(mi->get_transform());
		p_node->replace_by(nmi);
		memdelete(p_node);
		p_node=nmi;
	} else if (_teststr(name,"vehicle")) {

		if (isroot)
			return p_node;

		Node *owner = p_node->get_owner();
		Spatial *s = p_node->cast_to<Spatial>();
		VehicleBody *bv = memnew( VehicleBody );
		String n = _fixstr(p_node->get_name(),"vehicle");
		bv->set_name(n);
		p_node->replace_by(bv);
		p_node->set_name(n);
		bv->add_child(p_node);
		bv->set_owner(owner);
		p_node->set_owner(owner);
		bv->set_transform(s->get_transform());
		s->set_transform(Transform());

		p_node=bv;


	} else if (_teststr(name,"wheel")) {

		if (isroot)
			return p_node;

		Node *owner = p_node->get_owner();
		Spatial *s = p_node->cast_to<Spatial>();
		VehicleWheel *bv = memnew( VehicleWheel );
		String n = _fixstr(p_node->get_name(),"wheel");
		bv->set_name(n);
		p_node->replace_by(bv);
		p_node->set_name(n);
		bv->add_child(p_node);
		bv->set_owner(owner);
		p_node->set_owner(owner);
		bv->set_transform(s->get_transform());
		s->set_transform(Transform());

		p_node=bv;

	} else if (_teststr(name,"room") && p_node->cast_to<MeshInstance>()) {


		if (isroot)
			return p_node;

		MeshInstance *mi = p_node->cast_to<MeshInstance>();
		PoolVector<Face3> faces = mi->get_faces(VisualInstance::FACES_SOLID);


		BSP_Tree bsptree(faces);

		Ref<RoomBounds> area = memnew( RoomBounds );
		//area->set_bounds(faces);
		//area->set_geometry_hint(faces);


		Room * room = memnew( Room );
		room->set_name(_fixstr(name,"room"));
		room->set_transform(mi->get_transform());
		room->set_room(area);

		p_node->replace_by(room);
		memdelete(p_node);
		p_node=room;

	} else if (_teststr(name,"room")) {

		if (isroot)
			return p_node;

		Spatial *dummy = p_node->cast_to<Spatial>();
		ERR_FAIL_COND_V(!dummy,NULL);

		Room * room = memnew( Room );
		room->set_name(_fixstr(name,"room"));
		room->set_transform(dummy->get_transform());

		p_node->replace_by(room);
		memdelete(p_node);
		p_node=room;

		//room->compute_room_from_subtree();

	} else if (_teststr(name,"portal") && p_node->cast_to<MeshInstance>()) {

		if (isroot)
			return p_node;

		MeshInstance *mi = p_node->cast_to<MeshInstance>();
		PoolVector<Face3> faces = mi->get_faces(VisualInstance::FACES_SOLID);

		ERR_FAIL_COND_V(faces.size()==0,NULL);
		//step 1 compute the plane
		Set<Vector3> points;
		Plane plane;

		Vector3 center;

		for(int i=0;i<faces.size();i++) {

			Face3 f = faces.get(i);
			Plane p = f.get_plane();
			plane.normal+=p.normal;
			plane.d+=p.d;

			for(int i=0;i<3;i++) {

				Vector3 v = f.vertex[i].snapped(0.01);
				if (!points.has(v)) {
					points.insert(v);
					center+=v;
				}
			}
		}

		plane.normal.normalize();
		plane.d/=faces.size();
		center/=points.size();

		//step 2, create points

		Transform t;
		t.basis.from_z(plane.normal);
		t.basis.transpose();
		t.origin=center;

		Vector<Point2> portal_points;

		for(Set<Vector3>::Element *E=points.front();E;E=E->next()) {

			Vector3 local = t.xform_inv(E->get());
			portal_points.push_back(Point2(local.x,local.y));
		}
		// step 3 bubbly sort points

		int swaps=0;

		do {
			swaps=0;

			for(int i=0;i<portal_points.size()-1;i++) {

				float a = portal_points[i].angle();
				float b = portal_points[i+1].angle();

				if (a>b) {
					SWAP( portal_points[i], portal_points[i+1] );
					swaps++;
				}

			}

		} while(swaps);


		Portal *portal = memnew( Portal );

		portal->set_shape(portal_points);
		portal->set_transform( mi->get_transform() * t);

		p_node->replace_by(portal);
		memdelete(p_node);
		p_node=portal;

	} else if (p_node->cast_to<MeshInstance>()) {

		//last attempt, maybe collision insde the mesh data

		MeshInstance *mi = p_node->cast_to<MeshInstance>();

		Ref<Mesh> mesh = mi->get_mesh();
		if (!mesh.is_null()) {

			if (_teststr(mesh->get_name(),"col")) {

				mesh->set_name( _fixstr(mesh->get_name(),"col") );
				Ref<Shape> shape;

				if (collision_map.has(mesh)) {
					shape = collision_map[mesh];

				} else {

					shape = mesh->create_trimesh_shape();
					if (!shape.is_null())
						collision_map[mesh]=shape;


				}

				if (!shape.is_null()) {
#if 0
					StaticBody* static_body = memnew( StaticBody );
					ERR_FAIL_COND_V(!static_body,NULL);
					static_body->set_name( String(mesh->get_name()) + "_col" );
					shape->set_name(static_body->get_name());
					static_body->add_shape(shape);

					mi->add_child(static_body);
					if (mi->get_owner())
						static_body->set_owner( mi->get_owner() );
#endif
				}

			}

			for(int i=0;i<mesh->get_surface_count();i++) {

				Ref<FixedSpatialMaterial> fm = mesh->surface_get_material(i);
				if (fm.is_valid()) {
					String name = fm->get_name();
				/*	if (_teststr(name,"alpha")) {
						fm->set_fixed_flag(FixedSpatialMaterial::FLAG_USE_ALPHA,true);
						name=_fixstr(name,"alpha");
					}

					if (_teststr(name,"vcol")) {
						fm->set_fixed_flag(FixedSpatialMaterial::FLAG_USE_COLOR_ARRAY,true);
						name=_fixstr(name,"vcol");
					}*/
					fm->set_name(name);
				}
			}

		}

	}


	return p_node;
}


void ResourceImporterScene::_create_clips(Node *scene, const Array& p_clips,bool p_bake_all) {

	if (!scene->has_node(String("AnimationPlayer")))
		return;

	Node* n = scene->get_node(String("AnimationPlayer"));
	ERR_FAIL_COND(!n);
	AnimationPlayer *anim = n->cast_to<AnimationPlayer>();
	ERR_FAIL_COND(!anim);

	if (!anim->has_animation("default"))
		return;


	Ref<Animation> default_anim = anim->get_animation("default");

	for(int i=0;i<p_clips.size();i+=4) {

		String name = p_clips[i];
		float from=p_clips[i+1];
		float to=p_clips[i+2];
		bool loop=p_clips[i+3];
		if (from>=to)
			continue;

		Ref<Animation> new_anim = memnew( Animation );

		for(int j=0;j<default_anim->get_track_count();j++) {


			List<float> keys;
			int kc = default_anim->track_get_key_count(j);
			int dtrack=-1;
			for(int k=0;k<kc;k++) {

				float kt = default_anim->track_get_key_time(j,k);
				if (kt>=from && kt<to) {

					//found a key within range, so create track
					if (dtrack==-1) {
						new_anim->add_track(default_anim->track_get_type(j));
						dtrack = new_anim->get_track_count()-1;
						new_anim->track_set_path(dtrack,default_anim->track_get_path(j));

						if (kt>(from+0.01) && k>0) {

							if (default_anim->track_get_type(j)==Animation::TYPE_TRANSFORM) {
								Quat q;
								Vector3 p;
								Vector3 s;
								default_anim->transform_track_interpolate(j,from,&p,&q,&s);
								new_anim->transform_track_insert_key(dtrack,0,p,q,s);
							}
						}

					}

					if (default_anim->track_get_type(j)==Animation::TYPE_TRANSFORM) {
						Quat q;
						Vector3 p;
						Vector3 s;
						default_anim->transform_track_get_key(j,k,&p,&q,&s);
						new_anim->transform_track_insert_key(dtrack,kt-from,p,q,s);
					}

				}

				if (dtrack!=-1 && kt>=to) {

					if (default_anim->track_get_type(j)==Animation::TYPE_TRANSFORM) {
						Quat q;
						Vector3 p;
						Vector3 s;
						default_anim->transform_track_interpolate(j,to,&p,&q,&s);
						new_anim->transform_track_insert_key(dtrack,to-from,p,q,s);
					}
				}

			}

			if (dtrack==-1 && p_bake_all) {
				new_anim->add_track(default_anim->track_get_type(j));
				dtrack = new_anim->get_track_count()-1;
				new_anim->track_set_path(dtrack,default_anim->track_get_path(j));
				if (default_anim->track_get_type(j)==Animation::TYPE_TRANSFORM) {


					Quat q;
					Vector3 p;
					Vector3 s;
					default_anim->transform_track_interpolate(j,from,&p,&q,&s);
					new_anim->transform_track_insert_key(dtrack,0,p,q,s);
					default_anim->transform_track_interpolate(j,to,&p,&q,&s);
					new_anim->transform_track_insert_key(dtrack,to-from,p,q,s);
				}

			}
		}


		new_anim->set_loop(loop);
		new_anim->set_length(to-from);
		anim->add_animation(name,new_anim);
	}

	anim->remove_animation("default"); //remove default (no longer needed)
}

void ResourceImporterScene::_filter_anim_tracks(Ref<Animation> anim,Set<String> &keep) {

	Ref<Animation> a = anim;
	ERR_FAIL_COND(!a.is_valid());

	print_line("From Anim "+anim->get_name()+":");

	for(int j=0;j<a->get_track_count();j++) {

		String path = a->track_get_path(j);

		if (!keep.has(path)) {

			print_line("Remove: "+path);
			a->remove_track(j);
			j--;
		}

	}
}


void ResourceImporterScene::_filter_tracks(Node *scene, const String& p_text) {

	if (!scene->has_node(String("AnimationPlayer")))
		return;
	Node* n = scene->get_node(String("AnimationPlayer"));
	ERR_FAIL_COND(!n);
	AnimationPlayer *anim = n->cast_to<AnimationPlayer>();
	ERR_FAIL_COND(!anim);

	Vector<String> strings = p_text.split("\n");
	for(int i=0;i<strings.size();i++) {

		strings[i]=strings[i].strip_edges();
	}

	List<StringName> anim_names;
	anim->get_animation_list(&anim_names);
	for(List<StringName>::Element *E=anim_names.front();E;E=E->next()) {

		String name = E->get();
		bool valid_for_this=false;
		bool valid=false;

		Set<String> keep;
		Set<String> keep_local;


		for(int i=0;i<strings.size();i++) {


			if (strings[i].begins_with("@")) {

				valid_for_this=false;
				for(Set<String>::Element *F=keep_local.front();F;F=F->next()) {
					keep.insert(F->get());
				}
				keep_local.clear();

				Vector<String> filters=strings[i].substr(1,strings[i].length()).split(",");
				for(int j=0;j<filters.size();j++) {

					String fname = filters[j].strip_edges();
					if (fname=="")
						continue;
					int fc = fname[0];
					bool plus;
					if (fc=='+')
						plus=true;
					else if (fc=='-')
						 plus=false;
					else
						continue;

					String filter=fname.substr(1,fname.length()).strip_edges();

					if (!name.matchn(filter))
						continue;
					valid_for_this=plus;
				}

				if (valid_for_this)
					valid=true;

			} else if (valid_for_this) {

				Ref<Animation> a = anim->get_animation(name);
				if (!a.is_valid())
					continue;

				for(int j=0;j<a->get_track_count();j++) {

					String path = a->track_get_path(j);

					String tname = strings[i];
					if (tname=="")
						continue;
					int fc = tname[0];
					bool plus;
					if (fc=='+')
						plus=true;
					else if (fc=='-')
						 plus=false;
					else
						continue;

					String filter=tname.substr(1,tname.length()).strip_edges();

					if (!path.matchn(filter))
						continue;

					if (plus)
						keep_local.insert(path);
					else if (!keep.has(path)) {
						keep_local.erase(path);
					}
				}

			}

		}

		if (valid) {
			for(Set<String>::Element *F=keep_local.front();F;F=F->next()) {
				keep.insert(F->get());
			}
			_filter_anim_tracks(anim->get_animation(name),keep);
		} else {

		}

	}



}

void ResourceImporterScene::_optimize_animations(Node *scene, float p_max_lin_error,float p_max_ang_error,float p_max_angle) {

	if (!scene->has_node(String("AnimationPlayer")))
		return;
	Node* n = scene->get_node(String("AnimationPlayer"));
	ERR_FAIL_COND(!n);
	AnimationPlayer *anim = n->cast_to<AnimationPlayer>();
	ERR_FAIL_COND(!anim);


	List<StringName> anim_names;
	anim->get_animation_list(&anim_names);
	for(List<StringName>::Element *E=anim_names.front();E;E=E->next()) {

		Ref<Animation> a = anim->get_animation(E->get());
		a->optimize(p_max_lin_error,p_max_ang_error,Math::deg2rad(p_max_angle));
	}
}


static String _make_extname(const String& p_str) {

	String ext_name=p_str.replace(".","_");
	ext_name=ext_name.replace(":","_");
	ext_name=ext_name.replace("\"","_");
	ext_name=ext_name.replace("<","_");
	ext_name=ext_name.replace(">","_");
	ext_name=ext_name.replace("/","_");
	ext_name=ext_name.replace("|","_");
	ext_name=ext_name.replace("\\","_");
	ext_name=ext_name.replace("?","_");
	ext_name=ext_name.replace("*","_");

	return ext_name;
}

void ResourceImporterScene::_make_external_resources(Node* p_node,const String& p_base_path, bool p_make_materials, bool p_make_meshes, Map<Ref<Material>,Ref<Material> >& p_materials, Map<Ref<Mesh>,Ref<Mesh> >& p_meshes) {

	List<PropertyInfo> pi;

	p_node->get_property_list(&pi);

	for (List<PropertyInfo>::Element *E=pi.front();E;E=E->next()) {

		if (E->get().type==Variant::OBJECT) {

			Ref<Material> mat = p_node->get(E->get().name);
			if (p_make_materials && mat.is_valid() && mat->get_name()!="") {


				if (!p_materials.has(mat)) {

					String ext_name = p_base_path+"."+_make_extname(mat->get_name())+".mtl";
					if (FileAccess::exists(ext_name)) {
						//if exists, use it
						Ref<Material> existing = ResourceLoader::load(ext_name);
						p_materials[mat]=existing;
					} else {

						ResourceSaver::save(ext_name,mat,ResourceSaver::FLAG_CHANGE_PATH);
						p_materials[mat]=mat;
					}
				}

				if (p_materials[mat]!=mat) {

					p_node->set(E->get().name,p_materials[mat]);
				}
			} else {

				Ref<Mesh> mesh = p_node->get(E->get().name);

				if (mesh.is_valid()) {

					bool mesh_just_added=false;

					if (p_make_meshes) {

						if (!p_meshes.has(mesh)) {

							String ext_name = p_base_path+"."+_make_extname(mesh->get_name())+".msh";
							if (FileAccess::exists(ext_name)) {
								//if exists, use it
								Ref<Mesh> existing = ResourceLoader::load(ext_name);
								p_meshes[mesh]=existing;
							} else {

								ResourceSaver::save(ext_name,mesh,ResourceSaver::FLAG_CHANGE_PATH);
								p_meshes[mesh]=mesh;
								mesh_just_added=true;
							}


						}
					}


					if (p_make_materials){

						if (mesh_just_added || !p_meshes.has(mesh)) {


							for(int i=0;i<mesh->get_surface_count();i++) {
								mat=mesh->surface_get_material(i);
								if (!mat.is_valid() || mat->get_name()=="")
									continue;

								if (!p_materials.has(mat)) {

									String ext_name = p_base_path+"."+_make_extname(mat->get_name())+".mtl";
									if (FileAccess::exists(ext_name)) {
										//if exists, use it
										Ref<Material> existing = ResourceLoader::load(ext_name);
										p_materials[mat]=existing;
									} else {

										ResourceSaver::save(ext_name,mat,ResourceSaver::FLAG_CHANGE_PATH);
										p_materials[mat]=mat;
									}
								}

								if (p_materials[mat]!=mat) {

									mesh->surface_set_material(i,p_materials[mat]);
								}

							}

							if(!p_make_meshes) {
								p_meshes[mesh]=Ref<Mesh>(); //save it anyway, so it won't be checked again
							}
						}
					}
				}
			}
		}
	}

	for(int i=0;i<p_node->get_child_count();i++) {

		_make_external_resources(p_node->get_child(i),p_base_path,p_make_materials,p_make_meshes,p_materials,p_meshes);
	}
}


void ResourceImporterScene::get_import_options(List<ImportOption> *r_options,int p_preset) const {


	r_options->push_back(ImportOption(PropertyInfo(Variant::STRING,"nodes/root_type",PROPERTY_HINT_TYPE_STRING,"Node"),"Spatial"));
	r_options->push_back(ImportOption(PropertyInfo(Variant::STRING,"nodes/root_name"),"Scene Root"));

	List<String> script_extentions;
	ResourceLoader::get_recognized_extensions_for_type("Script",&script_extentions);

	String script_ext_hint;

	for(List<String>::Element *E=script_extentions.front();E;E=E->next()) {
		if (script_ext_hint!="")
			script_ext_hint+=",";
		script_ext_hint+="*."+E->get();
	}

	r_options->push_back(ImportOption(PropertyInfo(Variant::STRING,"nodes/custom_script",PROPERTY_HINT_FILE,script_ext_hint),""));
	r_options->push_back(ImportOption(PropertyInfo(Variant::INT,"materials/location",PROPERTY_HINT_ENUM,"Node,Mesh"),0));
	r_options->push_back(ImportOption(PropertyInfo(Variant::INT,"materials/storage",PROPERTY_HINT_ENUM,"Bult-In,Files"),0));
	r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL,"geometry/compress"),true));
	r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL,"geometry/ensure_tangents"),true));
	r_options->push_back(ImportOption(PropertyInfo(Variant::INT,"geometry/storage",PROPERTY_HINT_ENUM,"Built-In,Files"),0));
	r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL,"animation/import",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_DEFAULT|PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED),true));
	r_options->push_back(ImportOption(PropertyInfo(Variant::REAL,"animation/fps",PROPERTY_HINT_RANGE,"1,120,1"),15));
	r_options->push_back(ImportOption(PropertyInfo(Variant::STRING,"animation/filter_script",PROPERTY_HINT_MULTILINE_TEXT),""));
	r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL,"animation/optimizer/enabled",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_DEFAULT|PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED),true));
	r_options->push_back(ImportOption(PropertyInfo(Variant::REAL,"animation/optimizer/max_linear_error"),0.05));
	r_options->push_back(ImportOption(PropertyInfo(Variant::REAL,"animation/optimizer/max_angular_error"),0.01));
	r_options->push_back(ImportOption(PropertyInfo(Variant::REAL,"animation/optimizer/max_angle"),22));
	r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL,"animation/optimizer/remove_unused_tracks"),true));
	r_options->push_back(ImportOption(PropertyInfo(Variant::INT,"animation/clips/amount",PROPERTY_HINT_RANGE,"0,256,1",PROPERTY_USAGE_DEFAULT|PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED),0));
	for(int i=0;i<256;i++) {
		r_options->push_back(ImportOption(PropertyInfo(Variant::STRING,"animation/clip_"+itos(i+1)+"/name"),""));
		r_options->push_back(ImportOption(PropertyInfo(Variant::INT,"animation/clip_"+itos(i+1)+"/start_frame"),0));
		r_options->push_back(ImportOption(PropertyInfo(Variant::INT,"animation/clip_"+itos(i+1)+"/end_frame"),0));
		r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL,"animation/clip_"+itos(i+1)+"/loops"),false));
	}
}

Error ResourceImporterScene::import(const String& p_source_file, const String& p_save_path, const Map<StringName,Variant>& p_options, List<String>* r_platform_variants, List<String> *r_gen_files) {

	String src_path=p_source_file;

	Ref<EditorSceneImporter> importer;
	String ext=src_path.get_extension().to_lower();


	EditorProgress progress("import",TTR("Import Scene"),104);
	progress.step(TTR("Importing Scene.."),0);

	for(Set< Ref<EditorSceneImporter> >::Element *E=importers.front();E;E=E->next()) {

		List<String> extensions;
		E->get()->get_extensions(&extensions);

		for(List<String>::Element *F=extensions.front();F;F=F->next()) {

			if (F->get().to_lower()==ext) {

				importer = E->get();
				break;
			}
		}

		if (importer.is_valid())
			break;
	}

	ERR_FAIL_COND_V(!importer.is_valid(),ERR_FILE_UNRECOGNIZED);

	float fps=p_options["animation/fps"];



	int import_flags=EditorSceneImporter::IMPORT_ANIMATION_DETECT_LOOP;
	if (!bool(p_options["animation/optimizer/remove_unused_tracks"]))
		import_flags|=EditorSceneImporter::IMPORT_ANIMATION_FORCE_ALL_TRACKS_IN_ALL_CLIPS;

	if (bool(p_options["animation/import"]))
		import_flags|=EditorSceneImporter::IMPORT_ANIMATION;

	if (bool(p_options["geometry/ensure_tangents"]))
		import_flags|=EditorSceneImporter::IMPORT_GENERATE_TANGENT_ARRAYS;

	if (int(p_options["materials/location"])==0)
		import_flags|=EditorSceneImporter::IMPORT_MATERIALS_IN_INSTANCES;


	Error err=OK;
	List<String> missing_deps; // for now, not much will be done with this
	Node *scene = importer->import_scene(src_path,import_flags,fps,&missing_deps,&err);
	if (!scene || err!=OK) {
		return err;
	}

	String root_type = p_options["nodes/root_type"];

	if (scene->get_class()!=root_type) {
		Object *base = ClassDB::instance(root_type);
		Node *base_node = NULL;
		if (base)
			base_node=base->cast_to<Node>();

		if (base_node) {

			scene->replace_by(base_node);
			memdelete(scene);
			scene=base_node;
		}
	}

	scene->set_name(p_options["nodes/root_name"]);


	err=OK;

	String animation_filter = String(p_options["animation/filter_script"]).strip_edges();

	bool use_optimizer = p_options["animation/optimizer/enabled"];
	float anim_optimizer_linerr=p_options["animation/optimizer/max_linear_error"];
	float anim_optimizer_angerr=p_options["animation/optimizer/max_angular_error"];
	float anim_optimizer_maxang=p_options["animation/optimizer/max_angle"];

	Map<Ref<Mesh>,Ref<Shape> > collision_map;

	scene=_fix_node(scene,scene,collision_map);

	if (use_optimizer) {
		_optimize_animations(scene,anim_optimizer_linerr,anim_optimizer_angerr,anim_optimizer_maxang);
	}

	Array animation_clips;
	{


		int clip_count = p_options["animation/clips/amount"];

		for(int i=0;i<clip_count;i++) {
			String name = p_options["animation/clip_"+itos(i+1)+"/name"];
			int from_frame = p_options["animation/clip_"+itos(i+1)+"/start_frame"];
			int end_frame = p_options["animation/clip_"+itos(i+1)+"/end_frame"];
			bool loop = p_options["animation/clip_"+itos(i+1)+"/loops"];

			animation_clips.push_back(name);
			animation_clips.push_back(from_frame/fps);
			animation_clips.push_back(end_frame/fps);
			animation_clips.push_back(loop);
		}

	}
	if (animation_clips.size()) {
		_create_clips(scene,animation_clips,!bool(p_options["animation/optimizer/remove_unused_tracks"]));
	}

	if (animation_filter!="") {
		_filter_tracks(scene,animation_filter);
	}


	bool external_materials = p_options["materials/storage"];
	bool external_meshes = p_options["geometry/storage"];

	if (external_materials || external_meshes) {
		Map<Ref<Material>, Ref<Material> > mat_map;
		Map<Ref<Mesh>, Ref<Mesh> > mesh_map;
		_make_external_resources(scene,p_source_file.get_basename(),external_materials,external_meshes,mat_map,mesh_map);
	}

	progress.step(TTR("Running Custom Script.."),2);

	String post_import_script_path = p_options["nodes/custom_script"];
	Ref<EditorScenePostImport>  post_import_script;

	if (post_import_script_path!="") {
		post_import_script_path = post_import_script_path;	// FIXME: is there a good reason for this?
		Ref<Script> scr = ResourceLoader::load(post_import_script_path);
		if (!scr.is_valid()) {
			EditorNode::add_io_error(TTR("Couldn't load post-import script:")+" "+post_import_script_path);
		} else {

			post_import_script = Ref<EditorScenePostImport>( memnew( EditorScenePostImport ) );
			post_import_script->set_script(scr.get_ref_ptr());
			if (!post_import_script->get_script_instance()) {
				EditorNode::add_io_error(TTR("Invalid/broken script for post-import (check console):")+" "+post_import_script_path);
				post_import_script.unref();
				return ERR_CANT_CREATE;
			}
		}
	}


	if (post_import_script.is_valid()) {
		scene = post_import_script->post_import(scene);
		if (!scene) {
			EditorNode::add_io_error(TTR("Error running post-import script:")+" "+post_import_script_path);
			return err;
		}


	}

	progress.step(TTR("Saving.."),104);

	Ref<PackedScene> packer = memnew( PackedScene );
	packer->pack(scene);
	print_line("SAVING TO: "+p_save_path+".scn");
	err = ResourceSaver::save(p_save_path+".scn",packer); //do not take over, let the changed files reload themselves

	memdelete(scene);

	EditorNode::get_singleton()->reload_scene(p_source_file);

	return OK;
}

ResourceImporterScene *ResourceImporterScene::singleton=NULL;

ResourceImporterScene::ResourceImporterScene()
{
	singleton=this;
}