1991-2006
Silicon Graphics, Inc.
glLoadMatrix
3G
glLoadMatrix
replace the current matrix with the specified matrix
C Specification
void glLoadMatrixd
const GLdouble * m
void glLoadMatrixf
const GLfloat * m
Parameters
m
Specifies a pointer to 16 consecutive values, which are used as the
elements of a
4
×
4
column-major matrix.
Description
glLoadMatrix replaces the current matrix with the one whose elements are specified by
m.
The current matrix is the projection matrix,
modelview matrix,
or texture matrix,
depending on the current matrix mode
(see glMatrixMode).
The current matrix, M, defines a transformation of coordinates.
For instance, assume M refers to the modelview matrix.
If
v
=
v
0
v
1
v
2
v
3
is the set of object coordinates
of a vertex,
and m points to an array of
16
single- or double-precision
floating-point values
m
=
m
0
m
1
...
m
15
,
then the modelview transformation
M
v
does the following:
M
v
=
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
Projection and texture transformations are similarly defined.
Notes
While the elements of the matrix may be specified with
single or double precision, the GL implementation may
store or operate on these values in less than single
precision.
Errors
GL_INVALID_OPERATION is generated if glLoadMatrix
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,
glMatrixMode,
glMultMatrix,
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/.