#include "SceneEntityConverter.h"
#include "SceneEntity.h"
#include "Geometry.h"
#include "Shape.h"
#include "Plane3.h"

using namespace std;


namespace CHCDemoEngine 
{

SceneEntity *SceneEntityConverter::ConvertBox(const AxisAlignedBox3 &box, 
											  Material *mat, 
											  Transform3 *trafo)
{
	SceneEntity *ent = new SceneEntity(trafo);

	vector<Triangle3> triangles;

	box.Triangulate(triangles);

	Vector3 *vertices = new Vector3[36];
	Vector3 *normals = new Vector3[36];

	for (size_t i = 0; i < triangles.size(); ++ i)
	{
		Triangle3 tri = triangles[i];

		vertices[i * 3 + 0] = tri.mVertices[0];
		vertices[i * 3 + 1] = tri.mVertices[1];
		vertices[i * 3 + 2] = tri.mVertices[2];

		Vector3 normal = tri.GetNormal();

		normals[i * 3 + 0] = normal;
		normals[i * 3 + 1] = normal;
		normals[i * 3 + 2] = normal;
	}

	Geometry *geom = new Geometry(vertices, normals, NULL, 36, true, NULL);

	Shape *shape = new Shape(geom, mat);
	ent->AddShape(shape);

	LODLevel lodLevel(0);

	lodLevel.AddShape(shape);
	ent->AddLODLevel(lodLevel);

	return ent;
}


SceneEntity *SceneEntityConverter::ConvertSphere(float radius,
												 float xspans,
												 float yspans,
												 Material *mat, 
												 Transform3 *trafo)
{
	// todo
	return NULL;
}


SceneEntity *SceneEntityConverter::ConvertPlane(const Plane3 &plane, 
												float xsize, 
												float ysize,
												float xspans,
												float yspans,
												Material *mat,
												Transform3 *trafo)
{
	SceneEntity *ent = new SceneEntity(trafo);

	vector<Triangle3> triangles;

	Vector3 x1, x2, x3, x4;
	float xsize_h = xsize * 0.5f;
	float ysize_h = xsize * 0.5f;

	x1 = Vector3(xsize_h, ysize_h, 0);
	x2 = Vector3(xsize_h, -ysize_h, 0);
	x3 = Vector3(-xsize_h, -ysize_h, 0);
	x4 = Vector3(-xsize_h, ysize_h, 0);
	
	triangles.push_back(Triangle3(x3, x2, x1));
	triangles.push_back(Triangle3(x3, x1, x4));

	Vector3 *vertices = new Vector3[6];
	Vector3 *normals = new Vector3[6];
	Texcoord2 *tex = new Texcoord2[6];

	tex[0].first = 0; tex[0].second = 0;
	tex[1].first = 50; tex[1].second = 0;
	tex[2].first = 50; tex[2].second = 50;

	tex[3].first = 0; tex[3].second = 0;
	tex[4].first = 50; tex[4].second = 50;
	tex[5].first = 0; tex[5].second = 50;

	for (size_t i = 0; i < triangles.size(); ++ i)
	{
		Triangle3 tri = triangles[i];

		vertices[i * 3 + 0] = tri.mVertices[0];
		vertices[i * 3 + 1] = tri.mVertices[1];
		vertices[i * 3 + 2] = tri.mVertices[2];

		Vector3 normal = tri.GetNormal();

		normals[i * 3 + 0] = normal;
		normals[i * 3 + 1] = normal;
		normals[i * 3 + 2] = normal;
	}

	Geometry *geom = new Geometry(vertices, normals, tex, 6, true, NULL);

	Shape *shape = new Shape(geom, mat);
	ent->AddShape(shape);

	LODLevel lodLevel(0);

	lodLevel.AddShape(shape);
	ent->AddLODLevel(lodLevel);

	return ent;
}

}