---

Manual Reference Pages  - GLLOADMATRIX (3G)

---

glLoadMatrixd, glLoadMatrixf - replace the current matrix with the specified matrix

CONTENTS

C Specification
Parameters
Description
Notes
Errors
Associated Gets
See Also

void glLoadMatrixd( const GLdouble *m )

void glLoadMatrixf( const GLfloat *m )

m	Specifies a pointer to 16 consecutive values, which are used as the elements of a 4 times 4 column-major matrix.

 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[0],m[1],...,m[15], then the modelview transformation M(v) does the following:

down130M(v) = (matrix ( m[0] m[1] m[2] m[3] m[4] m[5] m[6] m[7] m[8] m[9] m[10] m[11] m[12] m[13] m[14] m[15] )) times (matrix ( v[0] v[1] v[2] v[3] ))

Where ‘‘times’’ denotes matrix multiplication.

Projection and texture transformations are similarly defined.

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.

 GL_INVALID_OPERATION is generated if  glLoadMatrix is executed between the execution of  glBegin and the corresponding execution of  glEnd.

 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

 glLoadIdentity(3G),  glMatrixMode(3G),  glMultMatrix(3G),  glPushMatrix(3G)

Jump to page    or go to Top of page |  Section 3G |  Main Index.