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

Encapsulates an extended modelview matrix stack. More...

#include <openvrml/gl/viewer.h>

List of all members.

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.

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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.

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Constructor & Destructor Documentation

openvrml::gl::viewer::modelview_matrix_stack::modelview_matrix_stack

(

)

Construct.

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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.

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Member Data Documentation

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

The current stack depth.

std::stack< openvrml::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.