C SPECIFICATION

       void GLAPIENTRY glMultMatrixd( const GLdouble *m )
       void GLAPIENTRY glMultMatrixf( const GLfloat *m )

PARAMETERS

       m  Points to 16 consecutive values that are used as the elements  of  a
          4x4 column-major matrix.

DESCRIPTION

       glMultMatrix multiplies the current matrix with the one specified using
       m, and replaces the current matrix with the product.

       The current matrix is  determined  by  the  current  matrix  mode  (see
       glMatrixMode). It is either the projection matrix, modelview matrix, or
       the texture matrix.

EXAMPLES

       If the current matrix is C, and the coordinates to be transformed  are,
       v=(v[0],v[1],v[2],v[3]).  Then the current transformation is Cxv, or

                            c[0] c[4] c[8]  c[12]   v[0]



















                            c[1] c[5] c[9]  c[13]   v[1]

























                            c[3] c[7] c[11] c[15]   v[3]


       Calling glMultMatrix with an argument of m=m[0],m[1],...,m[15] replaces
       the current transformation with (CxM)xv, or

                c[0] c[4] c[8]  c[12]   m[0] m[4] m[8]  m[12]   v[0]



















                c[1] c[5] c[9]  c[13]   m[1] m[5] m[9]  m[13]   v[1]

























                c[3] c[7] c[11] c[15]   m[3] m[7] m[11] m[15]   v[3]


       Where 'x' denotes matrix multiplication, and v is represented as a  4x1
       matrix.

NOTES

       While the elements of the matrix may be specified with single or double
       precision, the GL may store or operate on these  values  in  less  than
       single precision.

       In  many  computer  languages  4x4  arrays are represented in row-major
       order. The transformations just described represent these  matrices  in
       column-major  order.  The order of the multiplication is important. For
       example, if the current transformation is a rotation, and  glMultMatrix
       is  called  with a translation matrix, the translation is done directly
       on the coordinates to be transformed, while the rotation is done on the
       results of that translation.

ERRORS

       GL_INVALID_OPERATION  is  generated if glMultMatrix is executed between
       the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS

       glGet with argument GL_MATRIX_MODE
       glGet with argument GL_COLOR_MATRIX
       glGet with argument GL_MODELVIEW_MATRIX
       glGet with argument GL_PROJECTION_MATRIX
       glGet with argument GL_TEXTURE_MATRIX

SEE ALSO

       glLoadIdentity, glLoadMatrix, glMatrixMode, glPushMatrix