C++ demos: prepare infrastructure, add spheres_shadow.cc
rename Ray::a to Ray::o
KdNode::shapes changed to pointer and added to union together with *children (to save memory)
+ − #ifndef KDTREE_H
+ − #define KDTREE_H
+ −
+ − #include <vector>
+ − #include <iostream>
+ − #include <fstream>
+ −
+ − #include "scene.h"
+ −
+ − using namespace std;
+ −
+ − class ShapeList: public vector<Shape*>
+ − {
+ − };
+ −
+ − class Container
+ − {
+ − protected:
+ − BBox bbox;
+ − public:
+ − ShapeList shapes;
+ − Container(): bbox(), shapes() {};
+ − virtual ~Container() {};
+ − virtual void addShape(Shape* aShape);
+ − //void addShapeNoExtend(Shape* aShape) { shapes.push_back(aShape); };
+ − virtual Shape *nearest_intersection(const Shape *origin_shape, const Ray &ray,
+ − float &nearest_distance);
+ − virtual void optimize() {};
+ − };
+ −
+ − class KdNode
+ − {
+ − float split;
+ − short axis; /* 0,1,2 => x,y,z; 3 => leaf */
+ − public:
+ − union {
+ − KdNode *children;
+ − ShapeList *shapes;
+ − };
+ −
+ − KdNode() : axis(3) { shapes = new ShapeList(); };
+ −
+ − void setAxis(short aAxis) { axis = aAxis; };
+ − short getAxis() { return axis; };
+ −
+ − void setSplit(float aSplit) { split = aSplit; };
+ − float getSplit() { return split; };
+ −
+ − void setLeaf() { axis = 3; };
+ − bool isLeaf() { return axis == 3; };
+ −
+ − KdNode *getLeftChild() { return children; };
+ − KdNode *getRightChild() { return children+1; };
+ −
+ − void addShape(Shape* aShape) { shapes->push_back(aShape); };
+ −
+ − void subdivide(BBox bbox, int depth);
+ − };
+ −
+ − class KdTree: public Container
+ − {
+ − KdNode *root;
+ − bool built;
+ − public:
+ − KdTree() : Container(), built(false) {};
+ − void addShape(Shape* aShape) { Container::addShape(aShape); built = false; };
+ − Shape *nearest_intersection(const Shape *origin_shape, const Ray &ray,
+ − float &nearest_distance);
+ − void optimize() { build(); };
+ − void build();
+ − void save(ostream &str, KdNode *node = NULL);
+ − void load(istream &str, KdNode *node = NULL);
+ − };
+ −
+ − #endif