First commit

vec3.h

@@ -0,0 +1,73 @@
+#ifndef VEC3_H
+#define VEC3_H
+
+#include <math.h>
+#include <stdio.h>
+
+struct vec3 {
+    /* Members */
+    double x;
+    double y;
+    double z;
+
+    /* Constructors */
+
+    // Default
+    vec3()  { x = 0; y = 0; z = 0; };
+
+    // Constructor proper. Values default to 0
+    vec3(double x = 0, double y = 0, double z = 0)
+    {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    /* Overriden operators */
+
+    // - operator. Not to be confused with substraction
+    vec3 operator-()
+    {
+        return vec3(-x, -y, -z);
+    }
+
+    // straightforward vector sum
+    vec3& operator+=(const vec3 &v)
+    {
+        this.x += v.x;
+        this.y += v.y;
+        this.z += v.z;
+    }
+
+    // scalar multiplication
+    vec3& operator*=(const double t)
+    {
+        x *= t;
+        y *= t;
+        z *= t;
+        return *this;
+    }
+
+    // division by a scalar t
+    vec3& operator/=(const double t)
+    {
+        x /= t;
+        y /= t;
+        z /= t;
+        return *this;
+    }
+
+    /* Methods */
+
+    double length()
+    {
+        std::sqrt(x*x + y*y + z*z);
+    }    
+};
+
+/* Type aliases */
+typedef point3 vec3;
+typedef color vec3;
+
+
+#endif