glLoadTransposeMatrix

Name

glLoadTransposeMatrix — replace the current matrix with the specified row-major ordered matrix

C Specification

void glLoadTransposeMatrixd( const GLdouble * m);

void glLoadTransposeMatrixf( const GLfloat * m);

Parameters

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

Description

glLoadTransposeMatrix 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 ⁡ 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 × v ⁡ 0 v ⁡ 1 v ⁡ 2 v ⁡ 3

Projection and texture transformations are similarly defined.

Calling glLoadTransposeMatrix with matrix M is identical in operation to glLoadMatrix with M T , where T represents the transpose.

Notes

glLoadTransposeMatrix is available only if the GL version is 1.3 or greater.

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 glLoadTransposeMatrix 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