Change World to use a base group instead of storing all the world object.

Makes the code simpler and avoid some potential issues. Add to change a bit some test to make them pass properly.

source/include/group.h

@@ -46,6 +46,8 @@ public:
 
     bool includes(Shape *b);
 
+    uint32_t getObjectCount() { return this->objectCount + this->unboxableObjectCount; };
+
     Group();
 
     void dumpMe(FILE * fp);

source/include/world.h

@@ -15,6 +15,7 @@
 #include <intersect.h>
 #include <ray.h>
 #include <stdio.h>
+#include <group.h>
 
 #ifdef ENABLE_LUA_SUPPORT
 extern "C" {
@@ -25,15 +26,13 @@ extern "C" {
 class World
 {
 public:
-    uint32_t objectCount;
     uint32_t lightCount;
 
 private:
-    uint32_t allocatedObjectCount;
     uint32_t allocatedLightCount;
-
     Light* *lightList;
-    Shape* *objectList;
+
+    Group worldGroup;
 
 #ifdef ENABLE_LUA_SUPPORT
     lua_State *L;
@@ -50,9 +49,12 @@ public:
     bool lightIsIn(Light &l);
     bool objectIsIn(Shape &s);
 
-    Shape *getObject(int i) { return this->objectList[i]; };
+    Shape *getObject(int i) { return this->worldGroup[i]; };
     Light *getLight(int i) { return this->lightList[i]; };
 
+    uint32_t getObjectCount() { return this->worldGroup.getObjectCount(); };
+    uint32_t getLightCount() { return this->lightCount; };
+
     Tuple shadeHit(Computation comps, uint32_t depthCount = 4);
     Tuple colourAt(Ray r, uint32_t depthCount = 4);
     bool isShadowed(Tuple point, Tuple lightPosition);

source/world.cpp

@@ -22,16 +22,12 @@ extern "C" {
 
 #define MIN_ALLOC (2)
 
-World::World() : objectCount(0), lightCount(0)
+World::World() : lightCount(0)
 {
     this->allocatedLightCount = MIN_ALLOC;
     this->lightList = (Light **)calloc(sizeof(Light *), MIN_ALLOC);
     this->lightCount = 0;
 
-    this->allocatedObjectCount = MIN_ALLOC;
-    this->objectList = (Shape **)calloc(sizeof(Shape *), MIN_ALLOC);
-    this->objectCount = 0;
-
 #ifdef ENABLE_LUA_SUPPORT
     this->L = luaL_newstate();   /* opens Lua */
     luaL_openlibs(L);            /* opens the basic library */
@@ -45,12 +41,10 @@ World::~World()
 
 void World::addObject(Shape *s)
 {
-    if ((this->objectCount + 1) > this->allocatedObjectCount)
-    {
-        this->allocatedObjectCount *= 2;
-        this->objectList = (Shape **)realloc(this->objectList, sizeof(Shape **) * this->allocatedObjectCount);
-    }
-    this->objectList[this->objectCount++] = s;
+    /* Cheaty but need to be done for now */
+    s->materialSet = true;
+
+    this->worldGroup.addObject(s);
 }
 
 void World::addLight(Light *l)
@@ -78,33 +72,12 @@ bool World::lightIsIn(Light &l)
 
 bool World::objectIsIn(Shape &s)
 {
-    int i;
-    for(i = 0; i < this->objectCount; i++)
-    {
-        if (*this->objectList[i] == s)
-        {
-            return true;
-        }
-    }
-    return false;
+    return this->worldGroup.includes(&s);
 }
 
 Intersect World::intersect(Ray r)
 {
-    Intersect ret;
-    int i, j;
-
-    for(i = 0; i < this->objectCount; i++)
-    {
-        Intersect xs = this->objectList[i]->intersect(r);
-
-        for(j = 0; j < xs.count(); j++)
-        {
-            ret.add(xs[j]);
-        }
-    }
-
-    return ret;
+    return this->worldGroup.intersect(r);
 }
 
 Tuple World::shadeHit(Computation comps, uint32_t depthCount)
@@ -230,12 +203,7 @@ void World::dumpMe(FILE *fp)
     fprintf(fp, "},\n");
 
     fprintf(fp, "\"Objects\": {\n");
-    for(i = 0; i < this->objectCount; i++)
-    {
-        fprintf(fp, "\"%d\": {\n", i);
-        this->objectList[i]->dumpMe(fp);
-        fprintf(fp, "},\n");
-    }
+    this->worldGroup.dumpMe(fp);
     fprintf(fp, "},\n");
 
     /* JSON Closing */

tests/world_test.cpp

@@ -22,8 +22,8 @@ TEST(WorldTest, Creating_a_world)
 {
     World w;
 
-    ASSERT_EQ(w.lightCount, 0);
-    ASSERT_EQ(w.objectCount, 0);
+    ASSERT_EQ(w.getLightCount(), 0);
+    ASSERT_EQ(w.getObjectCount(), 0);
 }
 
 TEST(WorldTest, The_default_world)
@@ -41,9 +41,12 @@ TEST(WorldTest, The_default_world)
 
     s2.setTransform(scaling(0.5, 0.5,0.5));
 
+    Shape *obj0 = w.getObject(0);
+    Shape *obj1 = w.getObject(1);
+
     ASSERT_TRUE(w.lightIsIn(l));
-    ASSERT_TRUE(w.objectIsIn(s1));
-    ASSERT_TRUE(w.objectIsIn(s2));
+    ASSERT_EQ(*obj0, s1);
+    ASSERT_EQ(*obj1, s2);
 }
 
 TEST(WorldTest, Intersect_a_world_with_a_ray)