fart/shapes/Shape.h

#ifndef SHAPE_H
#define SHAPE_H SHAPE_H

#include "util/Solver.h"
#include "util/Ray.h"
#include "util/Vector.h"
#include "util/Transform.h"
#include "util/Material.h"
#include "util/refptr.h"
#include <vector>
#include <utility>

class Shape
{
    public:
        class Intersection
        {
            public:
                Intersection() {};
                Intersection(refptr<Shape> shape,
                             const Vector & position,
                             const Vector & normal)
                {
                    this->shape = shape;
                    this->position = position;
                    this->normal = normal;
                }
                refptr<Shape> shape;
                Vector position;
                Vector normal;
                Intersection transform(Transform & t)
                {
                    return Intersection(shape,
                            t.transform_point(position),
                            t.transform_normal(normal));
                }
        };
        class BoolIntersection
        {
            public:
                BoolIntersection() {};
                BoolIntersection(const Intersection & intersection, bool left)
                {
                    this->intersection = intersection;
                    this->left = left;
                }
                Intersection intersection;
                bool left;
        };
        class IntersectionList
        {
            public:
                void add(const Intersection & i)
                {
                    m_intersections.push_back(i);
                }
                Intersection & operator[](int i)
                {
                    return m_intersections[i];
                }
                const Intersection & operator[](int i) const
                {
                    return m_intersections[i];
                }
                size_t size() const { return m_intersections.size(); }
                std::vector<Intersection>::iterator begin()
                {
                    return m_intersections.begin();
                }
                std::vector<Intersection>::iterator end()
                {
                    return m_intersections.end();
                }
            protected:
                std::vector< Intersection > m_intersections;
        };
        class BoolIntersectionList
        {
            public:
                BoolIntersectionList(const IntersectionList & l1,
                                     const IntersectionList & l2,
                                     const Vector & startPoint);
                BoolIntersection & operator[](int i)
                {
                    return m_intersections[i];
                }
                const BoolIntersection & operator[](int i) const
                {
                    return m_intersections[i];
                }
                size_t size() const { return m_intersections.size(); }
                std::vector<BoolIntersection>::iterator begin()
                {
                    return m_intersections.begin();
                }
                std::vector<BoolIntersection>::iterator end()
                {
                    return m_intersections.end();
                }

            protected:
                std::vector< BoolIntersection > m_intersections;
        };

        Shape();
        virtual ~Shape();
        virtual IntersectionList intersect(refptr<Shape> _this,
                                           const Ray & ray) = 0;
        virtual refptr<Shape> clone() = 0;

        void setTransform(const Transform & t)
        {
            m_transform = t;
            m_inverse = m_transform.getInverse();
        }
        Transform & getTransform() { return m_transform; }

        virtual void setMaterial(refptr<Material> material);
        refptr<Material> getMaterial() const { return m_material; }

    protected:
        Transform m_transform;
        Transform m_inverse;
        refptr<Material> m_material;
};

typedef refptr<Shape> ShapeRef;

#endif