code: public static float[] vMad(float[] v1, float[] v2, float s) {
          float[] dest = new float[3];
          dest[0] = v1[0] + v2[0] * s;
          dest[1] = v1[1] + v2[1] * s;
          dest[2] = v1[2] + v2[2] * s;
          return dest;
      }
docs: / @param[in] s The amount to scale @p v2 by before adding to @p v1.