scm_render Class Reference

An scm_render manages the rendering of background and foreground spheres. More...

#include <scm-render.hpp>

Public Member Functions
	scm_render (int, int)
	Create a new render manager. Initialize the necessary OpenGL state framebuffer object state. More...
	~scm_render ()
	Finalize all OpenGL state.
void	set_size (int, int)
	Set the size of the off-screen render targets. This entails the destruction and recreation of OpenGL framebuffer objects, so it should not be called every frame.
void	set_blur (int)
	Set the motion blur degree. Higher degrees incur greater rendering loads. 8 is an effective value. Set 0 to disable motion blur completely.
void	set_wire (bool)
	Set the wireframe option.
int	get_blur () const
bool	get_wire () const
void	render (scm_sphere *, scm_scene *, scm_scene *, scm_scene *, scm_scene *, const double *, const double *, int, int, double)
	Render the foreground and background with optional blur and dissolve. More...
void	render (scm_sphere *, scm_scene *, scm_scene *, const double *, const double *, int, int)
	Render the foreground and background spheres without blur or dissolve. More...

Detailed Description

An scm_render manages the rendering of background and foreground spheres.

In the simplest case, this entails merely invoking the scm_sphere's render function to draw geometry to the screen. However, the render manager also supports motion blur and dissolve transitions. These features require the sphere to be rendered first to an off-screen buffer which is then drawn to the screen as a single rectangle with the appropriate shader enabled.

The render manager also maintains the wireframe debug option, which would otherwise conflict with more sophisticated capabilities.

Constructor & Destructor Documentation

scm_render::scm_render	(	int	w,
		int	h
	)

Create a new render manager. Initialize the necessary OpenGL state framebuffer object state.

Motion blur is disabled (set to zero) by default.

Parameters

w	Width of the off-screen render targets (in pixels).
h	Height of the off-screen render targets (in pixels).

Member Function Documentation

void scm_render::render	(	scm_sphere *	sphere,
		scm_scene *	fore0,
		scm_scene *	fore1,
		scm_scene *	back0,
		scm_scene *	back1,
		const double *	P,
		const double *	M,
		int	channel,
		int	frame,
		double	t
	)

Render the foreground and background with optional blur and dissolve.

Parameters

sphere	Sphere geometry manager to perform the rendering
fore0	Foreground scene at the beginning of a dissolve
fore1	Foreground scene at the end of a dissolve
back0	Background scene at the beginning of a dissolve
back1	Background scene at the end of a dissolve
P	Projection matrix in OpenGL column-major order
M	Model-view matrix in OpenGL column-major order
channel	Channel index
frame	Frame number
t	Dissolve time between 0 and 1

void scm_render::render	(	scm_sphere *	sphere,
		scm_scene *	fore,
		scm_scene *	back,
		const double *	P,
		const double *	M,
		int	channel,
		int	frame
	)

Render the foreground and background spheres without blur or dissolve.

This function is usually called by the previous function as needed to produce the desired effects. Calling it directly is a legitimate means of circumventing these options.

Parameters

sphere	Sphere geometry manager to perform the rendering
fore	Foreground scene
back	Background scene
P	Projection matrix in OpenGL column-major order
M	Model-view matrix in OpenGL column-major order
channel	Channel index
frame	Frame number

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The documentation for this class was generated from the following files:

• scm-render.hpp
• scm-render.cpp