AtmosphereApp Class Reference

Demo application for the atmospheric scattering shader. Demonstrate real-time approximate atmospheric scattering simulation. Based on Precomputed Atmospheric Scattering, E. Bruneton, F. Neyret, EGSR 2008. More...

#include <AtmosphereApp.hpp>

Public Member Functions
	AtmosphereApp (RenderingConfig &config, Window &window)
void	draw () override
void	update () override
void	resize () override
Public Member Functions inherited from CameraApp
	CameraApp (RenderingConfig &config, Window &window)
virtual void	update () override
virtual void	physics (double fullTime, double frameTime)
Public Member Functions inherited from Application
	Application (RenderingConfig &config, Window &window)
virtual void	draw ()=0
virtual void	update ()
virtual void	finish ()
virtual void	resize ()=0
double	timeElapsed ()
double	frameTime ()
double	frameRate ()
Window &	window ()
virtual	~Application ()
	Application (const Application &)=delete
Application &	operator= (const Application &)=delete
	Application (Application &&)=delete
Application &	operator= (Application &&)=delete

Static Public Member Functions
static void	precomputeTable (const Sky::AtmosphereParameters &params, uint samples, Image &table)

Private Member Functions
void	updateSky ()

Private Attributes
Texture	_atmosphereBuffer
	Scene texture.
Program *	_atmosphere
	Atmospheric scattering shader.
Program *	_tonemap
	Tonemapping shader.
Texture	_scattering
	Scattering lookup table.
Sky::AtmosphereParameters	_atmoParams
	Atmosphere parameters.
int	_tableRes = 256
	Scattering table resolution.
int	_tableSamples = 64
	Scattering table sample count.
glm::vec3	_lightDirection
	Sun light direction.
float	_lightElevation = 10.0f
	Sun vertical angular elevation.
float	_lightAzimuth = 290.0f
	Sun horizontal orientation.
float	_altitude = 1.0f
	View altitude above the planet surface.

Additional Inherited Members
Protected Member Functions inherited from CameraApp
void	freezeCamera (bool shouldFreeze)
Protected Attributes inherited from CameraApp
ControllableCamera	_userCamera
	The interactive camera.
Protected Attributes inherited from Application
RenderingConfig &	_config
	The current configuration.
std::unique_ptr< DebugViewer >	_debug
	Debug viewer.

Detailed Description

Demo application for the atmospheric scattering shader. Demonstrate real-time approximate atmospheric scattering simulation. Based on Precomputed Atmospheric Scattering, E. Bruneton, F. Neyret, EGSR 2008.

Inherits CameraApp.

Constructor & Destructor Documentation

AtmosphereApp()

AtmosphereApp::AtmosphereApp	(	RenderingConfig &	config,
		Window &	window
	)

Constructor

Parameters

config	rendering config
window	the window to render to

Member Function Documentation

draw()

void AtmosphereApp::draw ( )

overridevirtual

Draw call.

Implements Application.

precomputeTable()

void AtmosphereApp::precomputeTable ( const Sky::AtmosphereParameters &  params, uint  samples, Image &  table  )

static

Compute a scattering lookup table for real-time atmosphere rendering.

Parameters

params	the atmosphere parameters
samples	number of samples along a ray
table	the image to fill.

resize()

void AtmosphereApp::resize ( )

overridevirtual

Handle a window resize event, the configuration has been updated with the new size.

Implements Application.

update()

void AtmosphereApp::update ( )

overridevirtual

Per-frame update.

Reimplemented from CameraApp.

updateSky()

void AtmosphereApp::updateSky ( )

private

Update the lookup table based on internal atmosphere parameters.

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

• src/apps/atmosphere/AtmosphereApp.hpp
• src/apps/atmosphere/AtmosphereApp.cpp