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GLMULTMATRIX(3G)		 OpenGL Manual		      GLMULTMATRIX(3G)

NAME
       glMultMatrix - multiply the current matrix with the specified matrix

C SPECIFICATION
       void glMultMatrixd(const GLdouble * m);

       void glMultMatrixf(const GLfloat * m);

PARAMETERS
       m
	   Points to 16 consecutive values that are used as the elements of a
	   4 × 4 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 C × 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 × 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 × M × 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 × 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 × v ⁡ 0
       v ⁡ 1 v ⁡ 2 v ⁡ 3

       Where v is represented as a 4 × 1 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, 4 × 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.

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(), glLoadTransposeMatrix(),
       glMatrixMode(), glMultTransposeMatrix(), glPushMatrix()

COPYRIGHT
       Copyright © 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/.

AUTHORS
       opengl.org

opengl.org			  03/16/2013		      GLMULTMATRIX(3G)

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