#pragma once
#include "Intersectable.hpp"
#include "Occluder.hpp"

class Cylinder :
	public Intersectable
{
//	const Material*		material;
	Vector	centre;
	float	radius;
	float top;
	float bottom;
public:
	Cylinder(std::istream& isc, Material** materialTable, int nMaterials)
		:centre(centre),radius(radius), top(top), bottom(bottom)
	{
		centre.clear();
		radius = 1.0f;
		material = &Material::DIFFUSEWHITE;
		top = 100.0f;
		bottom = -100.0f;
		char key[200];
		do
		{
			isc >> key;
			if(strcmp(key,"radius") == 0)	isc >> radius;
			else if(strcmp(key,"centre") == 0)	isc >> centre;
			else if(strcmp(key,"top") == 0)	isc >> top;
			else if(strcmp(key,"bottom") == 0)	isc >> bottom;
			else if(strcmp(key,"material") == 0)
			{ 
				isc >> key;
				for(int i=0; i < nMaterials; i++)
				{
					material = materialTable[i];
					if(strcmp(key, material->getName()) == 0) break;
				}
			}
		}while(strcmp(key,"end") != 0);
		Vector diagonal(radius, radius, radius);
		bbox.minPoint = centre - diagonal;
		bbox.maxPoint = centre + diagonal;
		bbox.minPoint.y = bottom;
		bbox.maxPoint.y = top;
		nOccluders = 1;
		occluders = new Occluder(centre, radius);
	}
	Cylinder(const Vector& centre, const float radius,
		const float top, const float bottom, 
		const Material* material)
		:centre(centre),radius(radius), top(top), bottom(bottom)
	{
		this->material = material;
		Vector diagonal(radius, radius, radius);
		bbox.minPoint = centre - diagonal;
		bbox.maxPoint = centre + diagonal;
		bbox.minPoint.y = bottom;
		bbox.maxPoint.y = top;
		nOccluders = 1;
		occluders = new Occluder(centre, radius);
	}
	bool intersectBackSide(const Ray& ray, float& depth, float rayMin, float rayMax );
	bool intersect(const Ray& ray, float& depth, float rayMin, float rayMax);
	Vector getShadingNormal(const Vector& point)
	{
		if(point.y >= top - 0.000001f)
			return Vector(0.0f, 1.0f, 0.0f);
		if(point.y <= bottom + 0.000001f)
			return Vector(0.0f, -1.0f, 0.0f);
		Vector normal = point - centre;
		normal.y = 0.0f;
		normal *= 1.0f / radius;
		return normal;
	}
};