GLLOADMATRIX(3G)GLLOADMATRIX(3G)NAME
glLoadMatrixd, glLoadMatrixf - replace the current matrix with the
specified matrix
C SPECIFICATION
void glLoadMatrixd( const GLdouble *m )
void glLoadMatrixf( const GLfloat *m )
delim $$
PARAMETERS
m Specifies a pointer to 16 consecutive values, which are used as
the elements of a $4 ~times~ 4$ column-major matrix.
DESCRIPTIONglLoadMatrix 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 $m[0], m[1],. . .,m[15]$, then the modelview transformation
$M(v)$ does the following:
down 130 {M(v) ~ = ~ {{ left ( matrix {
ccol { ~m[0] above m[1] above m[2] above m[3] ~}
ccol { ~m[4] above m[5] above m[6] above m[7] ~}
ccol { ~m[8] above m[9] above m[10] above m[11] ~}
ccol { ~m[12]~ above m[13]~ above m[14]~ above m[15]~} } right ) }
~~ times ~~ {left ( matrix { ccol { ~v[0]~ above ~v[1]~ above ~v[2]~
above ~v[3]~ } } right )} }}
Where ``$times$'' denotes matrix multiplication.
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 ALSOglLoadIdentity(3G), glMatrixMode(3G), glMultMatrix(3G),
glPushMatrix(3G)
March 1, 2011
