fglpushmatrix man page on IRIX

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fglPushMatrix(3G)	       OpenGL Reference		     fglPushMatrix(3G)

NAME
     fglPushMatrix, fglPopMatrix - push and pop the current matrix stack

FORTRAN SPECIFICATION
     SUBROUTINE fglPushMatrix( )

FORTRAN SPECIFICATION
     SUBROUTINE fglPopMatrix( )

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.

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

     fglPopMatrix 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 fglPushMatrix is called while the
     current matrix stack is full.

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

     GL_INVALID_OPERATION is generated if fglPushMatrix or fglPopMatrix is
     executed between the execution of fglBegin and the corresponding
     execution of fglEnd.

ASSOCIATED GETS
     fglGet with argument GL_MATRIX_MODE
     fglGet with argument GL_COLOR_MATRIX
     fglGet with argument GL_MODELVIEW_MATRIX
     fglGet with argument GL_PROJECTION_MATRIX
     fglGet with argument GL_TEXTURE_MATRIX
     fglGet with argument GL_COLOR_STACK_DEPTH
     fglGet with argument GL_MODELVIEW_STACK_DEPTH
     fglGet with argument GL_PROJECTION_STACK_DEPTH

									Page 1

fglPushMatrix(3G)	       OpenGL Reference		     fglPushMatrix(3G)

     fglGet with argument GL_TEXTURE_STACK_DEPTH
     fglGet with argument GL_MAX_MODELVIEW_STACK_DEPTH
     fglGet with argument GL_MAX_PROJECTION_STACK_DEPTH
     fglGet with argument GL_MAX_TEXTURE_STACK_DEPTH

SEE ALSO
     fglFrustum, fglLoadIdentity, fglLoadMatrix, fglMatrixMode, fglMultMatrix,
     fglOrtho, fglRotate, fglScale, fglTranslate, fglViewport

									Page 2

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