NAME
glLoadMatrixd, glLoadMatrixf
- replace the current matrix with the specified matrix
C SPECIFICATION
void ggllLLooaaddMMaattrriixxdd(
const GLdouble _*_m )
void ggllLLooaaddMMaattrriixxff(
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.
DESCRIPTION
ggllLLooaaddMMaattrriixx 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 ggllMMaattrriixxMMooddee).
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
GGLL__IINNVVAALLIIDD__OOPPEERRAATTIIOONN is generated if ggllLLooaaddMMaattrriixx
is executed between the execution of ggllBBeeggiinn
and the corresponding execution of ggllEEnndd.
ASSOCIATED GETS
ggllGGeett with argument GGLL__MMAATTRRIIXX__MMOODDEE
ggllGGeett with argument GGLL__CCOOLLOORR__MMAATTRRIIXX
ggllGGeett with argument GGLL__MMOODDEELLVVIIEEWW__MMAATTRRIIXX
ggllGGeett with argument GGLL__PPRROOJJEECCTTIIOONN__MMAATTRRIIXX
ggllGGeett with argument GGLL__TTEEXXTTUURREE__MMAATTRRIIXX
SEE ALSO
ggllLLooaaddIIddeennttiittyy((33GG)),
ggllMMaattrriixxMMooddee((33GG)),
ggllMMuullttMMaattrriixx((33GG)),
ggllPPuusshhMMaattrriixx((33GG))