glmatrixmode(3g) [suse man page]

GLMATRIXMODE(3G)														  GLMATRIXMODE(3G)

NAME

       glMatrixMode - specify which matrix is the current matrix

C SPECIFICATION

       void glMatrixMode( GLenum mode )

PARAMETERS

       mode  Specifies which matrix stack is the target for subsequent matrix operations.  Three values are accepted: GL_MODELVIEW, GL_PROJECTION,
	     and GL_TEXTURE.  The initial value is GL_MODELVIEW.

	     Additionally, if the GL_ARB_imaging extension is supported, GL_COLOR is also accepted.

DESCRIPTION

       glMatrixMode sets the current matrix mode.  mode can assume one of four values:

       GL_MODELVIEW		Applies subsequent matrix operations to the modelview matrix stack.

       GL_PROJECTION		Applies subsequent matrix operations to the projection matrix stack.

       GL_TEXTURE		Applies subsequent matrix operations to the texture matrix stack.

       GL_COLOR 		Applies subsequent matrix operations to the color matrix stack.

       To find out which matrix stack is currently the target of all matrix operations, call glGet with argument GL_MATRIX_MODE. The initial value
       is GL_MODELVIEW.

ERRORS

       GL_INVALID_ENUM is generated if mode is not an accepted value.

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

ASSOCIATED GETS

       glGet with argument GL_MATRIX_MODE

SEE ALSO

       glLoadMatrix(3G), glPushMatrix(3G)

																  GLMATRIXMODE(3G)

GLPUSHMATRIX(3G)														  GLPUSHMATRIX(3G)

NAME

       glPushMatrix, glPopMatrix - push and pop the current matrix stack

C SPECIFICATION

       void glPushMatrix( void )

C SPECIFICATION

       void glPopMatrix( void )

DESCRIPTION

       There  is  a  stack  of	matrices for each of the matrix modes.	In GL_MODELVIEW mode, the stack depth is at least 32.  In the other modes,
       GL_COLOR, const(PROJECTION), and GL_TEXTURE, the depth is at least 2.  The current matrix in any mode is the matrix on the top of the stack
       for that mode.

       glPushMatrix  pushes  the current matrix stack down by one, duplicating the current matrix.  That is, after a glPushMatrix call, the matrix
       on top of the stack is identical to the one below it.

       glPopMatrix pops the current matrix stack, replacing the current matrix with the one below it on the stack.

       Initially, each of the stacks contains one matrix, an identity matrix.

       It is an error to push a full matrix stack, or to pop a matrix stack that contains only a single matrix.  In either case, the error flag is
       set and no other change is made to GL state.

ERRORS

       GL_STACK_OVERFLOW is generated if glPushMatrix is called while the current matrix stack is full.

       GL_STACK_UNDERFLOW is generated if glPopMatrix is called while the current matrix stack contains only a single matrix.

       GL_INVALID_OPERATION  is generated if glPushMatrix or glPopMatrix is executed between the execution of glBegin and the corresponding execu-
       tion 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
       glGet with argument GL_COLOR_STACK_DEPTH
       glGet with argument GL_MODELVIEW_STACK_DEPTH
       glGet with argument GL_PROJECTION_STACK_DEPTH
       glGet with argument GL_TEXTURE_STACK_DEPTH
       glGet with argument GL_MAX_MODELVIEW_STACK_DEPTH
       glGet with argument GL_MAX_PROJECTION_STACK_DEPTH
       glGet with argument GL_MAX_TEXTURE_STACK_DEPTH

SEE ALSO

       glFrustum, glLoadIdentity, glLoadMatrix, glMatrixMode, glMultMatrix, glOrtho, glRotate, glScale, glTranslate, glViewport

																  GLPUSHMATRIX(3G)