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       glMultMatrix - multiply the current matrix with the specified matrix

       void glMultMatrixd(const GLdouble * m);

       void glMultMatrixf(const GLfloat * m);

	   Points to 16 consecutive values that are used as the elements of a 4 x 4 column-major

       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.

       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 C x v, or

       c  0 c  4 c  8 c  12 c  1 c  5 c  9 c  13 c  2 c  6 c  10 c  14 c  3 c  7 c  11 c  15 x v
       0 v  1 v  2 v  3

       Calling glMultMatrix with an argument of m = m  0 m  1 ... m  15 replaces the current
       transformation with C x M x v, or

       c  0 c  4 c  8 c  12 c  1 c  5 c  9 c  13 c  2 c  6 c  10 c  14 c  3 c  7 c  11 c  15 x m
       0 m  4 m  8 m  12 m  1 m  5 m  9 m  13 m  2 m  6 m  10 m  14 m  3 m  7 m  11 m  15 x v  0
       v  1 v  2 v  3

       Where v is represented as a 4 x 1 matrix.

       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, 4 x 4 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.

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

       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

       glLoadIdentity(), glLoadMatrix(), glLoadTransposeMatrix(), glMatrixMode(),
       glMultTransposeMatrix(), glPushMatrix()

       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.


opengl.org				    06/10/2014				 GLMULTMATRIX(3G)
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