1GLPUSHMATRIX(3G)                 OpenGL Manual                GLPUSHMATRIX(3G)
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NAME

6       glPushMatrix - push and pop the current matrix stack
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C SPECIFICATION

9       void glPushMatrix(void);
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C SPECIFICATION

12       void glPopMatrix(void);
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DESCRIPTION

15       There is a stack of matrices for each of the matrix modes. In
16       GL_MODELVIEW mode, the stack depth is at least 32. In the other modes,
17       GL_COLOR, GL_PROJECTION, and GL_TEXTURE, the depth is at least 2. The
18       current matrix in any mode is the matrix on the top of the stack for
19       that mode.
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21       glPushMatrix pushes the current matrix stack down by one, duplicating
22       the current matrix. That is, after a glPushMatrix call, the matrix on
23       top of the stack is identical to the one below it.
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25       glPopMatrix() pops the current matrix stack, replacing the current
26       matrix with the one below it on the stack.
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28       Initially, each of the stacks contains one matrix, an identity matrix.
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30       It is an error to push a full matrix stack or to pop a matrix stack
31       that contains only a single matrix. In either case, the error flag is
32       set and no other change is made to GL state.
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ERRORS

35       GL_STACK_OVERFLOW is generated if glPushMatrix is called while the
36       current matrix stack is full.
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38       GL_STACK_UNDERFLOW is generated if glPopMatrix() is called while the
39       current matrix stack contains only a single matrix.
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41       GL_INVALID_OPERATION is generated if glPushMatrix or glPopMatrix() is
42       executed between the execution of glBegin() and the corresponding
43       execution of glEnd().
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ASSOCIATED GETS

46       glGet() with argument GL_MATRIX_MODE
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48       glGet() with argument GL_COLOR_MATRIX
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50       glGet() with argument GL_MODELVIEW_MATRIX
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52       glGet() with argument GL_PROJECTION_MATRIX
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54       glGet() with argument GL_TEXTURE_MATRIX
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56       glGet() with argument GL_COLOR_MATRIX_STACK_DEPTH
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58       glGet() with argument GL_MODELVIEW_STACK_DEPTH
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60       glGet() with argument GL_PROJECTION_STACK_DEPTH
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62       glGet() with argument GL_TEXTURE_STACK_DEPTH
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64       glGet() with argument GL_MAX_MODELVIEW_STACK_DEPTH
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66       glGet() with argument GL_MAX_PROJECTION_STACK_DEPTH
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68       glGet() with argument GL_MAX_TEXTURE_STACK_DEPTH
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SEE ALSO

71       glFrustum(), glLoadIdentity(), glLoadMatrix(), glLoadTransposeMatrix(),
72       glMatrixMode(), glMultMatrix(), glMultTransposeMatrix(), glOrtho(),
73       glRotate(), glScale(), glTranslate(), glViewport()
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76       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
77       under the SGI Free Software B License. For details, see
78       http://oss.sgi.com/projects/FreeB/.
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AUTHORS

81       opengl.org
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85opengl.org                        07/13/2018                  GLPUSHMATRIX(3G)
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