improving Ray, Sphere, Solver, Scene a bit

git-svn-id: svn://anubis/fart/trunk@35 7f9b0f55-74a9-4bce-be96-3c2cd072584d

main/Scene.cc

@@ -4,6 +4,8 @@
 #include <string>
 #include <map>
 #include "BMP.h"
+#include "shapes/Shape.h"
+#include "shapes/Sphere.h"
 using namespace std;
 
 Scene::Scene(map<string, const char *> options,
@@ -50,10 +52,18 @@ Scene::~Scene()
 {
     if (m_data != NULL)
         delete m_data;
+    for (vector<Shape *>::iterator it = m_shapes.begin();
+         it != m_shapes.end();
+         it++)
+    {
+        delete (*it);
+    }
 }
 
 void Scene::load(const char * filename)
 {
+    /* TODO: parse file somehow */
+    m_shapes.push_back(new Sphere(2.0));
 }
 
 void Scene::render()

main/Scene.h

@@ -4,6 +4,8 @@
 
 #include <string>
 #include <map>
+#include <vector>
+#include "shapes/Shape.h"
 
 class Scene
 {
@@ -23,6 +25,7 @@ class Scene
         std::string m_output_file_name;
         bool m_verbose;
         unsigned char * m_data;
+        std::vector<Shape *> m_shapes;
 };
 
 #endif

shapes/Sphere.cc

@@ -18,5 +18,15 @@ Solver::Result Sphere::intersect(const Ray & ray)
                            + ray.getOrigin()[1] * ray.getOrigin()[1]
                            + ray.getOrigin()[2] * ray.getOrigin()[2] );
     Solver::Result quadSolutions = solver.solve();
+    int resIdx = 0;
+    for (int i = 0; i < quadSolutions.numResults; i++)
+    {
+        if (quadSolutions.results[i] >= 0.0)
+        {
+            res.results[resIdx] = quadSolutions.results[i];
+            resIdx++;
+            res.numResults = resIdx;
+        }
+    }
     return res;
 }

util/Ray.h

@@ -12,6 +12,7 @@ class Ray
         const Vector & getOrigin() const { return m_origin; }
         const Vector & getDirection() const { return m_direction; }
         Vector getPositionAt(double dist) const;
+        Vector operator[](double dist) const { return getPositionAt(dist); }
 
     private:
         Vector  m_origin;

util/Solver.cc

@@ -75,3 +75,8 @@ QuarticSolver::QuarticSolver(double a, double b, double c, double d, double e)
 Solver::Result QuarticSolver::solve()
 {
 }
+
+Solver::Result::Result()
+{
+    numResults = 0;
+}

util/Solver.h

@@ -5,11 +5,13 @@
 class Solver
 {
     public:
-        typedef struct
+        class Result
         {
+            public:
+                Result();
                 int     numResults;
                 double  results[4];
-        } Result;
+        };
 
         Solver(double a = 0.0,
                double b = 0.0,