Removed cmath dependency.

Makefile

@@ -3,7 +3,7 @@ HEADERS = ray.hpp figure.hpp sphere.hpp plane.hpp disk.hpp material.hpp light.hp
 OBJECTS = main.o sphere.o plane.o disk.o directional_light.o tracer.o 
 CXX = g++
 CXXFLAGS = -ansi -pedantic -Wall -g -DGLM_FORCE_RADIANS -fopenmp
-LDLIBS = -lm
+LDLIBS = 
 
 .PHONY: all
 all: $(TARGET)

directional_light.cpp

@@ -1,5 +1,3 @@
-#include <cmath>
-
 #include <glm/glm.hpp>
 #include <glm/gtc/constants.hpp>
 
@@ -8,12 +6,14 @@
 using glm::pi;
 using glm::reflect;
 using glm::dot;
+using glm::pow;
+using glm::max;
 
 vec3 DirectionalLight::shade(vec3 normal, Ray & r, Material & m) const {
   float n_dot_l, r_dot_l;
   vec3 color, ref;
 
-  n_dot_l = max(dot(normal, m_position), 0.0);
+  n_dot_l = max(dot(normal, m_position), 0.0f);
   color += (m.m_diffuse / pi<float>()) * m_diffuse * n_dot_l;
 
   ref = reflect(m_position, normal);

light.hpp

@@ -16,10 +16,6 @@ public:
   vec3 m_specular;
   vec3 m_ambient;
 
-  float max(float a, float b) const {
-    return a >= b ? a : b;
-  }
-
   virtual ~Light() { }
 
   virtual vec3 shade(vec3 normal, Ray & r, Material & m) const = 0;

plane.cpp

@@ -1,16 +1,14 @@
-#include <cmath>
-
 #include "plane.hpp"
 
 #define TOL 1e-6
 
-using std::fabs;
+using glm::abs;
 using glm::dot;
 
 bool Plane::intersect(Ray & r, float & t) const {
   float d = dot(r.m_direction, m_normal);
 
-  if (fabs(d) > TOL) {
+  if (abs(d) > TOL) {
     t = dot(m_normal, (m_point - r.m_origin)) / d;
     return t >= 0.0f;
   }

sphere.cpp

@@ -1,8 +1,7 @@
-#include <cmath>
-
 #include "sphere.hpp"
 
 using glm::normalize;
+using glm::sqrt;
 
 bool Sphere::intersect(Ray & r, float & t) const {
   float t1, t2;

tracer.cpp

@@ -17,7 +17,7 @@ using glm::reflect;
 using glm::refract;
 using glm::clamp;
 using glm::tan;
-using glm::cos;
+using glm::sqrt;
 
 static const vec3 BCKG_COLOR = vec3(0.16f, 0.66f, 0.72f);