began putting everything together

code/particles/P3.h

@@ -0,0 +1,31 @@
+#ifndef P3_H
+#define P3_H
+
+struct P3 {
+
+	double x;
+	double y;
+	double z;
+
+	P3() : x(0), y(0), z(0) {;}
+	P3(const double x, const double y, const double z) : x(x), y(y), z(z) {;}
+
+	P3 operator - (const P3& o) const {
+		return P3(x-o.x, y-o.y, z-o.z);
+	}
+
+	P3 operator + (const P3& o) const {
+		return P3(x+o.x, y+o.y, z+o.z);
+	}
+
+	P3 operator * (const double v) const {
+		return P3(x*v, y*v, z*v);
+	}
+
+	double getLength(const double floorHeight_cm) const {
+		 return std::sqrt(x*x + y*y + z*floorHeight_cm*z*floorHeight_cm);
+	}
+
+};
+
+#endif // P3_H