277     double vz = vector.z();  in scale()  local
281         m[2][2] = vz;  in scale()
285         m[2][2] *= vz;  in scale()
291         m[2][2] *= vz;  in scale()
301         m[2][0] *= vz;  in scale()
302         m[2][1] *= vz;  in scale()
303         m[2][2] *= vz;  in scale()
304         m[2][3] *= vz;  in scale()
405     double vz = vector.z();  in translate()  local
409         m[3][2] = vz;  in translate()
413         m[3][2] += vz;  in translate()
417         m[3][2] = m[2][2] * vz;  in translate()
421         m[3][2] += m[2][2] * vz;  in translate()
425         m[3][2] += m[2][2] * vz;  in translate()
427         m[3][0] += m[0][0] * vx + m[1][0] * vy + m[2][0] * vz;  in translate()
428         m[3][1] += m[0][1] * vx + m[1][1] * vy + m[2][1] * vz;  in translate()
429         m[3][2] += m[0][2] * vx + m[1][2] * vy + m[2][2] * vz;  in translate()
430         m[3][3] += m[0][3] * vx + m[1][3] * vy + m[2][3] * vz;  in translate()