1GLMULTMATRIX(3G)                 OpenGL Manual                GLMULTMATRIX(3G)
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NAME

6       glMultMatrix - multiply the current matrix with the specified matrix
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C SPECIFICATION

9       void glMultMatrixd(const GLdouble * m);
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11       void glMultMatrixf(const GLfloat * m);
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PARAMETERS

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

19       glMultMatrix multiplies the current matrix with the one specified using
20       m, and replaces the current matrix with the product.
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22       The current matrix is determined by the current matrix mode (see
23       glMatrixMode()). It is either the projection matrix, modelview matrix,
24       or the texture matrix.
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EXAMPLES

27       If the current matrix is C and the coordinates to be transformed are v
28       = v ⁡ 0 v ⁡ 1 v ⁡ 2 v ⁡ 3, then the current transformation is C × v, or
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30       c ⁡ 0 c ⁡ 4 c ⁡ 8 c ⁡ 12 c ⁡ 1 c ⁡ 5 c ⁡ 9 c ⁡ 13 c ⁡ 2 c ⁡ 6 c ⁡ 10 c
31       ⁡ 14 c ⁡ 3 c ⁡ 7 c ⁡ 11 c ⁡ 15 × v ⁡ 0 v ⁡ 1 v ⁡ 2 v ⁡ 3
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33       Calling glMultMatrix with an argument of m = m ⁡ 0 m ⁡ 1 ... m ⁡ 15
34       replaces the current transformation with C × M × v, or
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36       c ⁡ 0 c ⁡ 4 c ⁡ 8 c ⁡ 12 c ⁡ 1 c ⁡ 5 c ⁡ 9 c ⁡ 13 c ⁡ 2 c ⁡ 6 c ⁡ 10 c
37       ⁡ 14 c ⁡ 3 c ⁡ 7 c ⁡ 11 c ⁡ 15 × m ⁡ 0 m ⁡ 4 m ⁡ 8 m ⁡ 12 m ⁡ 1 m ⁡ 5 m
38       ⁡ 9 m ⁡ 13 m ⁡ 2 m ⁡ 6 m ⁡ 10 m ⁡ 14 m ⁡ 3 m ⁡ 7 m ⁡ 11 m ⁡ 15 × v ⁡ 0
39       v ⁡ 1 v ⁡ 2 v ⁡ 3
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41       Where v is represented as a 4 × 1 matrix.
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NOTES

44       While the elements of the matrix may be specified with single or double
45       precision, the GL may store or operate on these values in
46       less-than-single precision.
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48       In many computer languages, 4 × 4 arrays are represented in row-major
49       order. The transformations just described represent these matrices in
50       column-major order. The order of the multiplication is important. For
51       example, if the current transformation is a rotation, and glMultMatrix
52       is called with a translation matrix, the translation is done directly
53       on the coordinates to be transformed, while the rotation is done on the
54       results of that translation.
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ERRORS

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

61       glGet() with argument GL_MATRIX_MODE
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63       glGet() with argument GL_COLOR_MATRIX
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65       glGet() with argument GL_MODELVIEW_MATRIX
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67       glGet() with argument GL_PROJECTION_MATRIX
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69       glGet() with argument GL_TEXTURE_MATRIX
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SEE ALSO

72       glLoadIdentity(), glLoadMatrix(), glLoadTransposeMatrix(),
73       glMatrixMode(), glMultTransposeMatrix(), glPushMatrix()
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76       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
77       under the SGI Free Software B License. For details, see
78       http://oss.sgi.com/projects/FreeB/.
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AUTHORS

81       opengl.org
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85opengl.org                        07/13/2018                  GLMULTMATRIX(3G)
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