Custom Import Plugin

<?xml version="1.0"?>
<scene name="my_custom_scene">
	<node name="root">
		<node name="Mesh1">
			<attribute type="mesh">
				<surfaces>
					<surface name="cube_surface1" offset="0" size="12"/>
					<surface name="cube_surface2" offset="12" size="12"/>
					<surface name="cube_surface3" offset="24" size="12"/>
				</surfaces>
				<vertices>
					<vertex>0.0 0.0 0.0</vertex>
					<vertex>0.0 1.0 0.0</vertex>
					<vertex>1.0 1.0 0.0</vertex>
					<vertex>1.0 0.0 0.0</vertex>
					<vertex>0.0 0.0 1.0</vertex>
					<vertex>0.0 1.0 1.0</vertex>
					<vertex>1.0 1.0 1.0</vertex>
					<vertex>1.0 0.0 1.0</vertex>
				</vertices>
				<indices num_indices="36">0 1 2 2 3 0 4 7 6 6 5 4 3 2 6 6 7 3 4 5 1 1 0 4 4 0 3 3 7 4 5 6 2 2 1 5</indices>
			</attribute>
			<transform>1 0 0 0.0 0 1 0 0.0 0 0 1 0.0 -0.5 -1 0.0 1.0</transform>
		</node>
		<node name="OmniLight1">
			<attribute type="light">
				<light_type>LIGHT_OMNI</light_type>
				<color>0.0 1.0 0.0 1.0</color>
				<intensity>0.5f</intensity>
			</attribute>
			<transform>1 0 0 0.0 0 1 0 0.0 0 0 1 0.0 5.0 5.0 5.0 1.0</transform>
		</node>
		<node name="OmniLight2">
			<attribute type="light">
				<light_type>LIGHT_OMNI</light_type>
				<color>0.0 0.0 1.0 1.0</color>
				<intensity>0.5f</intensity>
			</attribute>
			<transform>1 0 0 0.0 0 1 0 0.0 0 0 1 0.0 -5.0 5.0 5.0 1.0</transform>
		</node>
		<node name="ProjectedLight1">
			<attribute type="light">
				<light_type>LIGHT_PROJ</light_type>
				<color>1.0 0.0 0.0 1.0</color>
				<intensity>1.0f</intensity>
			</attribute>
			<transform>1 0 0 0.0 0 1 0 0.0 0 0 1 5.0 0 0 3.0 1.0</transform>
		</node>
		<node name="my_camera">
			<attribute type="camera">
				<camera_type>TYPE_PERSPECTIVE</camera_type>
				<near>0.001f</near>
				<far>10000.0f</far>
				<fov>60.0f</fov>
				<target>10.0 10.0 10.0</target>
			</attribute>
			<transform>1 0 0 0.0 0 1 0 0.0 0 0 1 0.0 0.0 -2.0 2.0 1.0</transform>
		</node>
	</node>
</scene>

#ifndef MY_IMPORT_PLUGIN_H
#define MY_IMPORT_PLUGIN_H

#include <UniginePlugin.h>

class MyImportPlugin : public Unigine::Plugin
{
public:
	MyImportPlugin();
	virtual ~MyImportPlugin();

protected:
	// specifying our plugin's name
	virtual const char *get_name() override { return "MyImportPlugin"; }

	// overriding methods for initialization and cleanup on shutdown
	virtual int init() override;
	virtual int shutdown() override;

};

#endif /* MY_IMPORT_PLUGIN_H */

#include "MyImportPlugin.h"
#include <UnigineImport.h>	// basic import functionality
#include "MyImporter.h"		// our importer's header file (we also declared our import processor there)

using namespace Unigine;

MyImportPlugin::MyImportPlugin()
{

}

MyImportPlugin::~MyImportPlugin()
{

}

// plugin initialization
int MyImportPlugin::init()
{
	// getting a pointer to the Import Manager
	Import *import = Import::get();
	
	// registering our custom importer and import processor
	import->registerImporter<MyImporter>("MyImporter");
	import->registerImportProcessor<MyImportProcessor>("MyImportProcessor");
	
	return 1;
}

// plugin cleanup on shutdown
int MyImportPlugin::shutdown()
{
	// getting a pointer to the Import Manager
	Import *import = Import::get();
	
	// removing our custom importer and import processor from the registry 
	import->unregisterImporter("MyImporter");
	import->unregisterImportProcessor("MyImportProcessor");
	return 1;
}

extern "C" {

	UNIGINE_EXPORT void *CreatePlugin()
	{
		return new MyImportPlugin();
	}

	UNIGINE_EXPORT void ReleasePlugin(void *plugin)
	{
		delete static_cast<MyImportPlugin *>(plugin);
	}

}

using namespace Unigine;

// template user data structures
template<typename Data>
struct TemplateUserData
{
	TemplateUserData(Data d)
		: data(d)
	{
	}
	Data data;
};

// camera metadata structure
struct MyCamera {
	String type;
	float near_plane;
	float far_plane;
	float fov;
	Math::vec3 target;
};

// light metadata structure
struct MyLight {
	String type;
	float intensity;
	Math::vec4 color;
};
// mesh metadata structure
struct MyMesh {
	String type;
	Unigine::Vector<String> surfaces;
	Unigine::Vector<Math::ivec3> polygons;
	Unigine::Vector<Math::vec3> vertices;
	Unigine::Vector<int> indices;
};

// declaring data types for imported scene components
using MyCameraData = TemplateUserData<MyCamera *>;
using MyLightData = TemplateUserData<MyLight *>;
using MyMeshData = TemplateUserData<MyMesh *>;

MyImporter::MyImporter()
{
	// setting up necessary import parameters to be used by default
	setParameterInt("vertex_cache", 1);
	setParameterFloat("scale", 1.0f);
	
	// adding a pre-processor
	addPreProcessor("MyImportProcessor");
}

MyImporter::~MyImporter()
{
	removePreProcessor("MyImportProcessor");
}

#ifndef MYIMPORTER_H
#define MYIMPORTER_H

#include <UnigineImport.h>
#include <UnigineMesh.h>
#include <UnigineHashMap.h>
#include <UnigineXml.h>

struct MyCamera;
struct MyLight;
struct MyMesh;

// declaring our custom import processor, as it is a pre-processor we should only override the onProcessScene() method
class MyImportProcessor : public Unigine::ImportProcessor
{
protected:
	virtual bool onProcessScene(Unigine::ImportScene *scene) override;
};

// declaring our custom importer
class MyImporter : public Unigine::Importer
{
	using ImportScene = Unigine::ImportScene;
	using ImportProcessor = Unigine::ImportProcessor;
	using ImportMesh = Unigine::ImportMesh;
	using ImportLight = Unigine::ImportLight;
	using ImportCamera = Unigine::ImportCamera;
	using ImportNode = Unigine::ImportNode;

public:
	MyImporter();
	virtual ~MyImporter();
	// here we define file extensions to be exported by our plugin, let it be a single .myext
	UNIGINE_INLINE static Unigine::Vector<Unigine::String> getExtensions() { return {"myext"}; }

protected:
	// overriding methods that we're going to use to import required scene components
	virtual Unigine::ImportScene *onInit(const Unigine::String &filepath) override;
	virtual bool onImport(const char *output_path) override;
	virtual bool onImportMesh(ImportProcessor *processor, Unigine::MeshPtr &mesh, ImportMesh *import_mesh) override;
	virtual bool onImportLight(ImportProcessor *processor, Unigine::LightPtr &light, ImportLight *import_light) override;
	virtual bool onImportCamera(ImportProcessor *processor, Unigine::PlayerPtr &camera, ImportCamera *import_camera) override;
	virtual bool onImportNode(ImportProcessor *processor, Unigine::NodePtr &node, ImportNode *import_node) override;

private:

	// method creating a new import scene, performing file format checks and parsing the input file to fill the hierarchy of metadata structures
	ImportScene *import_scene();
	
	// the methods below check required flags, perform necessary data preparations and add components to the hierarchy of scene metada structures (import_scene)
	void process_node(Unigine::ImportScene *import_scene, Unigine::ImportNode *parent, Unigine::XmlPtr scene_node);
	void process_mesh(ImportScene *import_scene, ImportNode *node, MyMesh *my_mesh);
	void process_light(ImportScene *import_scene, ImportNode *node, MyLight *my_light);
	void process_camera(ImportScene *import_scene, ImportNode *node, MyCamera *my_camera);
private:
	
	float scale { 1.0 };		// scale factor for the imported scene
	Unigine::XmlPtr my_scene;	// initial xml scene structure
};

#endif // MYIMPORTER_H

#include "MyImporter.h"
#include <UnigineThread.h>
#include <UnigineFileSystem.h>
#include <UnigineGeometry.h>
#include <UnigineNodes.h>
#include <UnigineWorld.h>
#include <UnigineHashSet.h>
#include <UnigineMaterials.h>
#include <UnigineDir.h>
#include <UnigineSet.h>

using namespace Unigine;

// template user data structures
template<typename Data>
struct TemplateUserData
{
	TemplateUserData(Data d)
		: data(d)
	{
	}
	Data data;
};

// camera metadata structure
struct MyCamera {
	String type;
	float near_plane;
	float far_plane;
	float fov;
	Math::vec3 target;
};

// light metadata structure
struct MyLight {
	String type;
	float intensity;
	Math::vec4 color;
};
// mesh metadata structure
struct MyMesh {
	String type;
	Unigine::Vector<String> surfaces;
	Unigine::Vector<Math::ivec3> polygons;
	Unigine::Vector<Math::vec3> vertices;
	Unigine::Vector<int> indices;
};

// declaring data types for imported scene components
using MyCameraData = TemplateUserData<MyCamera *>;
using MyLightData = TemplateUserData<MyLight *>;
using MyMeshData = TemplateUserData<MyMesh *>;

// auxiliary functions creating UNIGINE objects
namespace
{
	bool create_mesh(MeshPtr &mesh, ImportMesh *import_mesh, float scale);
	bool create_light(LightPtr &light, ImportLight *import_light);
	bool create_camera(PlayerPtr &camera, ImportCamera *import_camera);
}

MyImporter::MyImporter()
{
	// setting up necessary import parameters
	setParameterInt("vertex_cache", 1);
	setParameterFloat("scale", 1.0f);

	// adding a custom pre-processor
	addPreProcessor("MyImportProcessor");
}

MyImporter::~MyImporter()
{
	// removing our custom pre-processor
	removePreProcessor("MyImportProcessor");
}

Unigine::ImportScene *MyImporter::onInit(const String &filepath)
{
	// getting all necessary import parameters and making necessary preparations for scene import
	scale = getParameterFloat("scale");

	String filesystem_filepath = FileSystem::getAbsolutePath(filepath);
	my_scene = Xml::create();
	my_scene->load(filesystem_filepath);

	Log::message("\n\nLAUNCHING IMPORTING PROCESS... \n");

	// parse input file and fill metadata structures
	return import_scene();
}

bool MyImporter::onImport(const char *output_path)
{
	Log::message("\nOnImport() reporting... \n");
	// importing meshes
	{
		ImportProcessor *proc = nullptr;
		if (meshes_processor.size())
		{
			proc = Import::get()->createImportProcessor(meshes_processor);
			proc->setOutputPath(output_path);
			proc->setImporter(this);
		}

		Unigine::MeshPtr mesh = Unigine::Mesh::create();

		for (ImportMesh *import_mesh : scene->getMeshes())
		{
			mesh->clear();
			importMesh(proc, mesh, import_mesh);
		}

		delete proc;
	}
	// importing nodes
	{
		ImportProcessor *proc = nullptr;
		if (nodes_processor.size())
		{
			proc = Import::get()->createImportProcessor(nodes_processor);
			proc->setOutputPath(output_path);
			proc->setImporter(this);
		}

		for (ImportNode *node : scene->getNodes())
		{
			if (node->parent != nullptr) continue;
			NodePtr root_node;
			importNode(proc, root_node, node);
			output_filepath = node->filepath;
		}

		delete proc;
	}
	return true;
}

bool MyImporter::onImportMesh(ImportProcessor *processor, MeshPtr &mesh, ImportMesh *import_mesh)
{
	Log::message("\n onImportMesh reporting... \n");

	// trying to generate a Unigine Mesh using the ImportMesh data
	if (!create_mesh(mesh, import_mesh, scale))
	{
		Log::error("MyImporter::onImportMesh: can't create mesh.\n");
		return false;
	}

	// checking vertex_cache parameter and optimizing cache if necessary
	if (getParameterInt("vertex_cache"))
		mesh->optimizeIndices(Unigine::Mesh::VERTEX_CACHE);

	// calling a default processor to save the mesh to a file
	return processor->processMesh(mesh, import_mesh);
}

bool MyImporter::onImportCamera(ImportProcessor *processor, PlayerPtr &camera, ImportCamera *import_camera)
{
	Log::message("\n onImportCamera reporting... \n");
	// trying to generate a Unigine player using the ImportCamera data
	if (!create_camera(camera, import_camera))
	{
		Log::error("MyImporter::onImportCamera: can't create camera.\n");
		return false;
	}

	// saving player data to the resulting *.node file
	return processor->processCamera(camera, import_camera);
}

bool MyImporter::onImportLight(ImportProcessor *processor, LightPtr &light, ImportLight *import_light)
{
	Log::message("\n onImportLight reporting... \n");
	// trying to generate a Unigine light source using the ImportLight data
	if (!create_light(light, import_light))
	{
		Log::error("MyImporter::onImportLight: can't create light.\n");
		return false;
	}

	// saving light data to the resulting *.node file
	return processor->processLight(light, import_light);
}

bool MyImporter::onImportNode(ImportProcessor *processor, NodePtr &node, ImportNode *import_node)
{
	Log::message("\n onImportNode reporting: importing %s node\n", import_node->name.get());

	return processor->processNode(node, import_node);
}

ImportScene *MyImporter::import_scene()
{
	// creating a new import scene
	ImportScene *new_scene = new ImportScene();

	// performing necessary checks on file format
	String n = my_scene->getName();
	if (n != "scene")
	{
		Log::error("Scene loader: bad my_scene format\n");
		return 0;
	}

	// checking scene name
	String name = my_scene->getArg("name");
	if (String::null == name)
	{
		Log::error("Scene loader: scene name can't be empty\n");
		return 0;
	}
	// parsing the input file and filling the ImportScene 
	auto size = my_scene->getNumChildren();
	Log::message("Importing [%s] scene num_nodes = %d\n", name.get(), size);
	for (int i = 0; i < size; i++)
	{
		const XmlPtr child_xml = my_scene->getChild(i);
		const String &child_name = child_xml->getName();

		if (child_name == "node")
		{
			process_node(new_scene, nullptr, child_xml);
		}
		else
			Log::error("Scene loader: unknown element \"%s\" in the \"%s\" scene\n", child_name.get(), name.get());

	}

	return new_scene;
}

void MyImporter::process_node(ImportScene *import_scene, ImportNode *parent, XmlPtr scene_node)
{

	ImportNode *node = import_scene->addNode(parent);
	node->name = scene_node->getArg("name");
	if (scene_node->getChild("transform"))
	{
		node->transform.set(scene_node->getChild("transform")->getDMat4Data());
		node->transform.m03 *= scale;
		node->transform.m13 *= scale;
		node->transform.m23 *= scale;
	}

	// processing node attributes
	XmlPtr attribute = scene_node->getChild("attribute");
	if (attribute)
	{
		String attr_type = attribute->getArg("type");
		if (attr_type == "light")
		{
			// creating and filling light metadata
			MyLight *light = new MyLight();
			light->type = attribute->getChildData("light_type");
			light->color = attribute->getChild("color")->getVec4Data();
			light->intensity = attribute->getChild("intensity")->getFloatData();

			// processing light metadata and adding ImportLight to the scene
			process_light(import_scene, node, light);

			Log::message("Artribute light: named %s , type %s, color (%f, %f, %f, %f)\n", node->name.get(), light->type.get(), light->color.x, light->color.y, light->color.z, light->color.w);
		}
		else if (attr_type == "camera")
		{
			// creating and filling camera metadata
			MyCamera *camera = new MyCamera();
			camera->type = attribute->getChildData("player_type");
			camera->fov = attribute->getChild("fov")->getFloatData();
			camera->near_plane = attribute->getChild("near")->getFloatData();
			camera->far_plane = attribute->getChild("far")->getFloatData();
			camera->target = attribute->getChild("target")->getVec3Data();

			// processing camera metadata and adding ImportCamera to the scene
			process_camera(import_scene, node, camera);
			Log::message("Artribute camera: named %s , type %s, target (%f, %f, %f)\n", node->name.get(), camera->type.get(), camera->target.x, camera->target.y, camera->target.z);
		}
		else if (attr_type == "mesh")
		{
			// creating and filling mesh metadata
			MyMesh *mesh = new MyMesh();
			int num_surfaces = attribute->getChild("surfaces")->getNumChildren();
			int num_vertices = attribute->getChild("vertices")->getNumChildren();

			Log::message("Artribute mesh: named %s , %d surfaces, %d vertices\n", node->name.get(), num_surfaces, num_vertices);

			// getting all surfaces
			for (int i = 0; i < num_surfaces; ++i) {
				XmlPtr xml_surf = attribute->getChild("surfaces")->getChild(i);
				mesh->surfaces.append(xml_surf->getArg("name"));
				// filling polygons data
				mesh->polygons.append(Math::ivec3(i, xml_surf->getIntArg("offset"), xml_surf->getIntArg("size")));
				Log::message("\nSurface [%d] named: %s\n", i, mesh->surfaces[i].get());
			}
			// getting all vertices
			for (int i = 0; i < num_vertices; ++i) {
				mesh->vertices.append(attribute->getChild("vertices")->getChild(i)->getVec3Data());

				Log::message("Vertex [%d] coordinates:(%f, %f, %f)\n", i, mesh->vertices[i].x, mesh->vertices[i].y, mesh->vertices[i].z);
			}
			// getting all indices
			XmlPtr indices_xml = attribute->getChild("indices");
			int num_indices = indices_xml->getIntArg("num_indices");

			mesh->indices.resize(num_indices);
			indices_xml->getIntArrayData(mesh->indices.get(), num_indices);

			// processing mesh metadata and adding ImportMesh to the scene
			process_mesh(import_scene, node, mesh);
		}
	}

	// processing all node's children
	int num_children = scene_node->getNumChildren();
	for (int i = 0; i < num_children; ++i) {
		XmlPtr child = scene_node->getChild(i);
		const String &child_name = child->getName();
		if (child_name == "node")
			process_node(import_scene, node, child);
	}
}
void MyImporter::process_mesh(ImportScene *import_scene, ImportNode *node, MyMesh *my_mesh/*, fbx::FbxNode *fbx_node, fbx::FbxMesh *fbx_mesh*/)
{
	Log::message("\n FUNCTION: process_mesh() reporting... \n");
	if ((flags & IMPORT_MESHES) == 0)
		return;

	ImportMesh *mesh = import_scene->addMesh(node);
	mesh->name = node->name;

	ImportGeometry &geometry = mesh->geometries.append();
	geometry.transform = Math::dmat4_identity;
	mesh->has_animations = 0;
	geometry.data = new MyMeshData(my_mesh);

	//adding surfaces to the mesh
	for (int i = 0; i < my_mesh->surfaces.size(); i++)
	{
		ImportSurface &s = geometry.surfaces.append();
		s.name = my_mesh->surfaces[i];
		s.material = nullptr;
		s.data = nullptr;
		s.target_surface = geometry.surfaces.size() - 1;
	}
}
void MyImporter::process_light(ImportScene *import_scene, ImportNode *node, MyLight *my_light)
{
	Log::message("\n FUNCTION: process_light() reporting... \n");
	// checking if the light import flag is set
	if ((flags & IMPORT_LIGHTS) == 0) return;

	// adding a light source to the scene and setting lignt source data
	ImportLight *light = import_scene->addLight(node);
	light->data = new MyLightData(my_light);
}


void MyImporter::process_camera(MyImporter::ImportScene *import_scene, MyImporter::ImportNode *node, MyCamera *my_camera)
{
	Log::message("\n FUNCTION: process_camera() reporting... \n");
	// checking if the camera import flag is set
	if ((flags & IMPORT_CAMERAS) == 0) return;

	// adding a camera to the scene and setting camera data
	ImportCamera *camera = import_scene->addCamera(node);
	camera->data = new MyCameraData(my_camera);
}

namespace
{
	// auxiliary data structures to store mesh geometry information
	struct SurfaceData
	{
		int index;
		ImportSurface *surface;
		Unigine::Vector<int> cindices;
		Unigine::Vector<int> tindices;
	};

	struct GeometryData
	{
		Unigine::Math::vec3 *vertices;
		Unigine::Math::dmat4 transform;
	};

	bool create_surfaces(MeshPtr &mesh, const Unigine::Vector<SurfaceData> &surfaces, const GeometryData &geometry_data, float scale) {

		Log::message("\n FUNCTION: create_surfaces() reporting... \n");
		using namespace Unigine;
		using namespace Unigine::Math;

		const dmat4 &transform = geometry_data.transform;
		const Unigine::Math::vec3 *vertices = geometry_data.vertices;

		mat3 rotation = mat3(transform);
		// creating mesh surfaces using metadata
		for (const SurfaceData &surface : surfaces)
		{
			if (surface.cindices.empty())
				continue;

			int s = surface.surface->target_surface;
			while (s >= mesh->getNumSurfaces())
				mesh->addSurface();

			mesh->setSurfaceName(s, surface.surface->name);

			for (int index : surface.cindices) {
				mesh->addVertex(vec3(transform * vec3(vertices[index])), s);
				Log::message("\n FUNCTION: create_surfaces() reporting: adding vertex[%d] with coords (%f, %f, %f)... \n", index, vertices[index].x, vertices[index].y, vertices[index].z);
			}
			// applying scale
			mesh->setSurfaceTransform(Math::scale(vec3(scale)), s);
		}

		return true;
	}

	bool create_geometry(Unigine::MeshPtr &mesh, ImportGeometry &geometry, float scale)
	{
		Log::message("\n FUNCTION: create_geometry() REPORTING... \n");
		using namespace Unigine;
		using namespace Unigine::Math;

		MyMeshData *mesh_data = static_cast<MyMeshData *>(geometry.data);
		MyMesh *my_mesh = mesh_data->data;

		const dmat4 &transform = geometry.transform;

		GeometryData geometry_data;
		geometry_data.vertices = &my_mesh->vertices[0];
		geometry_data.transform = transform;

		Unigine::Vector<SurfaceData> surfaces_data;

		for (int n_surf = 0; n_surf < my_mesh->surfaces.size(); n_surf++)
		{
			// adding cindices and tindices and calling create surfaces
			SurfaceData &surface = surfaces_data.append();
			surface.index = n_surf;
			surface.surface = &geometry.surfaces[n_surf];

			int offset = my_mesh->polygons[n_surf].y;
			int size = my_mesh->polygons[n_surf].z;
			for (int i = 0; i < size; i++)
			{
				surface.cindices.append(my_mesh->indices[offset + i]);
				surface.tindices.append(my_mesh->indices[offset + i]);
			}
		}

		create_surfaces(mesh, surfaces_data, geometry_data, scale);
		return true;
	}

	bool create_mesh(Unigine::MeshPtr &mesh, ImportMesh *import_mesh, float scale)
	{
		Log::message("\n FUNCTION: create_mesh() reporting... \n");
		for (ImportGeometry &geometry : import_mesh->geometries)
			create_geometry(mesh, geometry, scale);


		int num_surfaces = mesh->getNumSurfaces();

		// creating mesh indices
		mesh->createIndices();

		for (int s = 0; s < num_surfaces; ++s)
		{
			if (!mesh->getNumTangents(s, 0))
				mesh->createTangents(s, 0);

			for (int t = 1; t < mesh->getNumSurfaceTargets(s); ++t)
				mesh->createTangents(s, t);
		}
		// creating mesh bounds
		mesh->createBounds();

		return true;
	}

	bool create_light(LightPtr &light, ImportLight *import_light)
	{
		using namespace Math;

		MyLight *my_light = static_cast<MyLightData *>(import_light->data)->data;

		// getting light parameters from the ImportLight structure
		String type = my_light->type;
		vec4 color = vec4(my_light->color);
		float intensity = my_light->intensity;

		// checking light source type and creating a corresponding light source
		if (type == "LIGHT_OMNI")
		{
			Log::message("\n FUNCTION: create_light() creating an OMNI light... \n");
			LightOmniPtr light_omni = LightOmni::create(color, 100.0f);
			light_omni->setIntensity(intensity);
			light_omni->setShapeType(Light::SHAPE_RECTANGLE);
			light_omni->setTransform(Mat4(import_light->node->transform));
			light = light_omni;
			return true;
		}
		else if (type == "LIGHT_PROJ")
		{
			Log::message("\n FUNCTION: create_light() creating a PROJ light... \n");
			LightProjPtr light_proj = LightProj::create(color, 100.0f, 60.0f);
			light_proj->setTransform(Mat4(import_light->node->transform));
			light = light_proj;
			return true;
		}

		Log::error("create_light: unknown light type.\n");
		return false;
	}

	bool create_camera(PlayerPtr &camera, ImportCamera *import_camera)
	{
		Log::message("\n FUNCTION: create_camera() reporting... \n");

		using namespace Unigine::Math;
		MyCamera *my_camera = static_cast<MyCameraData *>(import_camera->data)->data;

		// getting camera parameters from the ImportCamera structure
		float fov = my_camera->fov;
		float znear = my_camera->near_plane;
		float zfar = my_camera->far_plane;

		PlayerDummyPtr player_dummy = PlayerDummy::create();
		player_dummy->setZNear(znear);
		player_dummy->setZFar(zfar);
		player_dummy->worldLookAt((Vec3)my_camera->target, vec3_up);

		// setting player projection
		if (my_camera->type == "TYPE_ORTHOGONAL")
			player_dummy->setProjection(ortho(-1.0f, 1.0f, -1.0f, 1.0f, znear, zfar));

		if (my_camera->type == "TYPE_PERSPECTIVE")
			player_dummy->setFov(fov);

		camera = player_dummy;
		return true;
	}

}

// custom scene preprocessor stripping out color information from all scene light sources
bool MyImportProcessor::onProcessScene(ImportScene *scene)
{
	Log::message("\n MyImportProcessor reporting... \n");

	// getting the number of lights in the scene
	int num_lights = scene->getNumLights();

	// checking if the scene contains lights and the make_lights_white flag is set
	if (num_lights && getImporter()->getParameterFloat("make_lights_white")) {
		for (int i = 0; i < num_lights; i++)
		{
			// getting light data from the ImportLight sctructure
			MyLight *light = static_cast<MyLightData *>(scene->getLight(i)->data)->data;
			// setting color to white
			light->color = Math::vec4(1.0f);
		}
	}

	return true;
}