Adding shadows!

source/include/intersection.h

@@ -16,11 +16,13 @@ class Shape;
 
 struct Computation
 {
-    Computation(Shape *object, double t, Tuple point, Tuple eyev, Tuple normalv, bool inside) :
-          object(object), t(t), hitPoint(point), eyeVector(eyev), normalVector(normalv), inside(inside) { };
+    Computation(Shape *object, double t, Tuple point, Tuple eyev, Tuple normalv, Tuple overHitP, bool inside) :
+          object(object), t(t), hitPoint(point), eyeVector(eyev), normalVector(normalv), inside(inside), overHitPoint(overHitP) { };
+
     Shape *object;
     double t;
     Tuple hitPoint;
+    Tuple overHitPoint;
     Tuple eyeVector;
     Tuple normalVector;
 

source/include/material.h

@@ -25,7 +25,7 @@ public:
 public:
     Material() : colour(Colour(1, 1, 1)), ambient(0.1), diffuse(0.9), specular(0.9), shininess(200) {};
 
-    Colour lighting(Light light, Tuple point, Tuple eyeVector, Tuple normalVector);
+    Colour lighting(Light light, Tuple point, Tuple eyeVector, Tuple normalVector, bool inShadow = false);
 
     bool operator==(const Material &b) const { return double_equal(this->ambient,   b.ambient) &&
                                                       double_equal(this->diffuse,   b.diffuse) &&

source/include/math_helper.h

@@ -13,6 +13,7 @@
 #include <math.h>
 
 void set_equal_precision(double v);
+double getEpsilon();
 bool double_equal(double a, double b);
 
 double deg_to_rad(double deg);

source/include/world.h

@@ -43,6 +43,7 @@ public:
 
     Tuple shadeHit(Computation comps);;
     Tuple colourAt(Ray r);
+    bool isShadowed(Tuple point);
 
     Intersect intersect(Ray r);