Improved Blender/Collada -colonly import creating collision shapes for empties

tools/collada/collada.cpp

@@ -482,6 +482,24 @@ Transform Collada::_read_transform(XMLParser& parser) {
 	return _read_transform_from_array(array);
 }
 
+String Collada::_read_empty_draw_type(XMLParser& parser) {
+
+	String empty_draw_type = "";
+	
+	if (parser.is_empty())
+		return empty_draw_type;
+	
+	while (parser.read()==OK) {
+		if (parser.get_node_type() == XMLParser::NODE_TEXT) {
+			empty_draw_type = parser.get_node_data();
+		}
+		else
+		if (parser.get_node_type() == XMLParser::NODE_ELEMENT_END)
+			break; // end parsing text
+	}
+	return empty_draw_type;
+}
+
 Variant Collada::_parse_param(XMLParser& parser) {
 
 	if (parser.is_empty())
@@ -1665,6 +1683,8 @@ Collada::Node* Collada::_parse_visual_scene_node(XMLParser& parser) {
 	Vector<Node::XForm> xform_list;
 	Vector<Node*> children;
 	
+	String empty_draw_type="";
+
 	Node *node=NULL;
 
 	name=parser.has_attribute("name")?parser.get_attribute_value_safe("name"):parser.get_attribute_value_safe("id");
@@ -1771,6 +1791,8 @@ Collada::Node* Collada::_parse_visual_scene_node(XMLParser& parser) {
 
 				   xform_list.push_back(xf);
 
+			} else if (section=="empty_draw_type") {
+				empty_draw_type = _read_empty_draw_type(parser);
 			} else if (section == "technique" || section=="extra") {
 
 			} else if (section!="node") {
@@ -1817,6 +1839,7 @@ Collada::Node* Collada::_parse_visual_scene_node(XMLParser& parser) {
 
 	node->name=name;
 	node->id=id;
+	node->empty_draw_type=empty_draw_type;
 
 	if (node->children.size()==1) {
 		if (node->children[0]->noname && !node->noname) {

tools/collada/collada.h

@@ -403,6 +403,7 @@ public:
 
 		String name;
 		String id;
+		String empty_draw_type;
 		bool noname;
 		Vector<XForm> xform_list;
 		Transform default_transform;
@@ -635,6 +636,7 @@ private: // private stuff
 	Vector<float> _read_float_array(XMLParser& parser);
 	Vector<String> _read_string_array(XMLParser& parser);
 	Transform _read_transform(XMLParser& parser);
+	String _read_empty_draw_type(XMLParser& parser);
 
 	void _joint_set_owner(Collada::Node *p_node, NodeSkeleton *p_owner);
 	void _create_skeletons(Collada::Node **p_node, NodeSkeleton *p_skeleton=NULL);

tools/editor/io_plugins/editor_import_collada.cpp

@@ -355,6 +355,10 @@ Error ColladaImport::_create_scene(Collada::Node *p_node, Spatial *p_parent) {
 	p_parent->add_child(node);
 	node->set_owner(scene);
 
+	if (p_node->empty_draw_type!="") {
+		node->set_meta("empty_draw_type", Variant(p_node->empty_draw_type));
+	}
+	
 	for(int i=0;i<p_node->children.size();i++) {
 
 		Error err = _create_scene(p_node->children[i],node);

tools/editor/io_plugins/editor_scene_import_plugin.cpp

@@ -41,6 +41,10 @@
 #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>
 #include "tools/editor/create_dialog.h"
 #include "os/os.h"
 
@@ -1685,11 +1689,12 @@ Node* EditorSceneImportPlugin::_fix_node(Node *p_node,Node *p_root,Map<Ref<Mesh>
 		mi->set_baked_light_texture_id(layer);
 	}
 
-	if (p_flags&SCENE_FLAG_CREATE_COLLISIONS && _teststr(name,"colonly") && p_node->cast_to<MeshInstance>()) {
+	if (p_flags&SCENE_FLAG_CREATE_COLLISIONS && _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);
@@ -1706,7 +1711,39 @@ Node* EditorSceneImportPlugin::_fix_node(Node *p_node,Node *p_root,Map<Ref<Mesh>
 			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 (p_flags&SCENE_FLAG_CREATE_COLLISIONS &&_teststr(name,"col") && p_node->cast_to<MeshInstance>()) {
 

tools/export/blender25/io_scene_dae/export_dae.py

@@ -1104,6 +1104,14 @@ class DaeExporter:
 
 		self.writel(S_NODES,il,'<instance_light url="#'+lightid+'"/>')
 
+	def export_empty_node(self,node,il):
+
+		self.writel(S_NODES,4,'<extra>')
+		self.writel(S_NODES,5,'<technique profile="GODOT">')
+		self.writel(S_NODES,6,'<empty_draw_type>'+node.empty_draw_type+'</empty_draw_type>')
+		self.writel(S_NODES,5,'</technique>')
+		self.writel(S_NODES,4,'</extra>')
+
 
 	def export_curve(self,curve):
 
@@ -1264,6 +1272,8 @@ class DaeExporter:
 			self.export_camera_node(node,il)
 		elif (node.type=="LAMP"):
 			self.export_lamp_node(node,il)
+		elif (node.type=="EMPTY"):
+			self.export_empty_node(node,il)
 
 		for x in node.children:
 			self.export_node(x,il)