1 files changed, 43 insertions, 0 deletions
diff --git a/Vector.h b/Vector.h
new file mode 100644
index 0000000..f884c49
--- /dev/null
+++ b/Vector.h
@@ -0,0 +1,43 @@
+#ifndef _VECTOR_H_
+#define _VECTOR_H_
+
+#include "Vertex.h"
+
+class Vector : public Vertex {
+  public:
+    Vector(float x0 = 0, float y0 = 0, float z0 = 0) : Vertex(x0, y0, z0) {}
+    Vector(const Vertex &v) : Vertex(v) {}
+    
+    Vector operator+(const Vector &v) const {
+      return Vector(x+v.x, y+v.y, z+v.z);
+    }
+    
+    Vector operator*(float f) const {
+      return Vector(x*f, y*f, z*f);
+    }
+    
+    Vector operator/(float f) const {
+      return (*this)*(1/f);
+    }
+    
+    Vector operator-() const {
+      return Vector(-x, -y, -z);
+    }
+    
+    Vector cross(const Vector &v) const {
+      return Vector(y*v.z - z*v.y,
+                    z*v.x - x*v.z,
+                    x*v.y - y*v.x);
+    }
+    
+    float dot(const Vector &v) const {
+      return x*v.x + y*v.y + z*v.z;
+    }
+};
+
+static inline Vector operator-(const Vertex &v1, const Vertex &v2) {
+  return Vector(v1.getX()-v2.getX(), v1.getY()-v2.getY(), v1.getZ()-v2.getZ());
+}
+
+#endif /*_VECTOR_H_*/
+