glPushMatrix — push and pop the current matrix stack

`void ` | void`)` ; |

`void ` | void`)` ; |

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`

, `GL_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.

`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 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`

glGet with argument `GL_COLOR_MATRIX_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`

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

Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.