analyse determinant determinant3 dMtrx4D fromString getCol getGLMatrix getMatrix getMemSpace getRow hasScale Hat Hat inverse inverseGauss inverseOrthogonal isNull isUnity Matrix4D Matrix4D Matrix4D Matrix4D Matrix4D Matrix4D move move move move multVec multVec nullify operator!= operator* operator* operator* operator* operator*= operator*= operator+ operator+= operator- operator-= operator= operator== operator[] operator[] Outer Outer Print rotLine rotLine rotLine rotLine rotX rotY rotZ scale scale scale scale scale scale setCol setGLMatrix setMatrix setRow setToUnity setTrace toAxisAngle toAxisAngle toString trace traits_type transform transform transpose ~Matrix4D

isNull() bool isNull ( ) const 检查矩阵是否为零矩阵 检查矩阵是否为零矩阵。 返回 如果矩阵是零矩阵，返回 true；否则返回 false