glMultMatrix(3G) glMultMatrix(3G)[top]NAMEglMultMatrix, glMultMatrixd, glMultMatrixf - multiply the current matrix with the specified matrixSYNOPSISvoid glMultMatrixd( const GLdouble *m ); void glMultMatrixf( const GLfloat *m );PARAMETERSPoints to 16 consecutive values that are used as the elements of a 4 times 4 column-major matrix.DESCRIPTIONglMultMatrix() multiplies the current matrix with the one specified using m, and replaces the current matrix with the product. The current matrix is determined by the current matrix mode (see glMa‐ trixMode()). It is either the projection matrix, modelview matrix, or the texture matrix.EXAMPLESIf the current matrix is C, and the coordinates to be transformed are, v = (v[0], v[1], v[2], v[3]). Then the current transformation is C times v, or c[0] c[4] c[8] c[12] v[0] c[1] c[5] c[9] c[13] v[1] times c[2] c[6] c[10] c[14] v[2] c[3] c[7] c[11] c[15] v[3] Calling glMultMatrix() with an argument of "m" = m[0], m[1], ..., m[15] replaces the current transformation with (C times M) times v, or c[0] c[4] c[8] c[12] m[0] m[4] m[8] m[12] v[0] c[1] c[5] c[9] c[13] m[1] m[5] m[9] m[13] v[1] times times c[2] c[6] c[10] c[14] m[2] m[6] m[10] m[14] v[2] c[3] c[7] c[11] c[15] m[3] m[7] m[11] m[15] v[3] Where 'times' denotes matrix multiplication, and v is represented as a 4 times 1 matrix.NOTESWhile the elements of the matrix may be specified with single or double precision, the GL may store or operate on these values in less than single precision. In many computer languages 4 times 4 arrays are represented in row- major order. The transformations just described represent these matri‐ ces in column-major order. The order of the multiplication is impor‐ tant. For example, if the current transformation is a rotation, and glMultMatrix() is called with a translation matrix, the translation is done directly on the coordinates to be transformed, while the rotation is done on the results of that translation.ERRORSGL_INVALID_OPERATION is generated if glMultMatrix() is executed between the execution of glBegin() and the corresponding execution of glEnd().ASSOCIATED GETSglGet() 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_MATRIXSEE ALSOglLoadIdentity(3), glLoadMatrix(3), glMatrixMode(3), glPushMatrix(3) glMultMatrix(3G)

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