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# openvrml::gl::viewer::modelview_matrix_stack Class Reference

List of all members.

## Detailed Description

Encapsulates an extended modelview matrix stack.

OpenGL requires that implementations have a modelview matrix stack with a maximum depth of only 32. Regardless of that, the maximum depth can be expected to vary between implementations, and we don't want nesting of Transform nodes in VRML worlds to be constrained by this limit.

modelview_matrix_stack uses the OpenGL modelview matrix stack until it fills up, at which point any additional matrices that spill over are pushed onto a conventional stack of mat4f.

## Public Member Functions

| modelview_matrix_stack ()
| Construct.
void | push ()
| Push the current matrix onto the stack.
void | pop ()
| Pop the current matrix off of the stack.

## Private Attributes

size_t | size
| The current stack depth.
std::stack< mat4f > | spillover
| Any matrices that won't fit on the OpenGL modelview matrix stack get pushed onto this stack.

## Constructor & Destructor Documentation

openvrml::gl::viewer::modelview_matrix_stack::modelview_matrix_stack | ( |  | ) |

| Construct.

## Member Function Documentation

void openvrml::gl::viewer::modelview_matrix_stack::push | ( |  | ) |

Push the current matrix onto the stack.

Precondition:
  The current matrix is the modelview matrix.

void openvrml::gl::viewer::modelview_matrix_stack::pop | ( |  | ) |

Pop the current matrix off of the stack.

Precondition:
  The current matrix is the modelview matrix.

## Member Data Documentation

size_t openvrml::gl::viewer::modelview_matrix_stack::size`[private]`

| The current stack depth.

std::stack< mat4f > openvrml::gl::viewer::modelview_matrix_stack::spillover`[private]`

| Any matrices that won't fit on the OpenGL modelview matrix stack get pushed onto this stack.