Demo::HdrUtils Class Reference

#include <HdrUtils.h>

Static Public Member Functions
static void	init (Ogre::uint8 fsaa)
static void	setSkyColour (const Ogre::ColourValue &colour, float multiplier, Ogre::CompositorWorkspace *workspace)
static void	setExposure (float exposure, float minAutoExposure, float maxAutoExposure)
	Modifies the HDR Materials for the new exposure parameters By default the HDR implementation will try to auto adjust the exposure based on the scene's average luminance. More...
static void	setBloomThreshold (float minThreshold, float fullColourThreshold)
	Controls the bloom intensity. More...

Member Function Documentation

init()

void Demo::HdrUtils::init ( Ogre::uint8  fsaa )

static

setBloomThreshold()

void Demo::HdrUtils::setBloomThreshold ( float  minThreshold, float  fullColourThreshold  )

static

Controls the bloom intensity.

Parameters

minThreshold	Colours darker than minThreshold will not contribute to bloom. Higher thresholds reduce the amount of bloom. Scale is in lumens / 1024.
fullColourThreshold	The bloom fades between minThreshold & fullColourThreshold. Must be > minThreshold. If it is too close to it, bloom fading may be too harsh/sudden. Scale is the same as minThreshold.

setExposure()

void Demo::HdrUtils::setExposure ( float  exposure, float  minAutoExposure, float  maxAutoExposure  )

static

Modifies the HDR Materials for the new exposure parameters By default the HDR implementation will try to auto adjust the exposure based on the scene's average luminance.

If left unbounded, even the darkest scenes can look well lit and the brigthest scenes appear too normal.

These parameters are useful to prevent the auto exposure from jumping too much from one extreme to the other and provide a consistent experience within the same lighting conditions. (e.g. you may want to change the params when going from indoors to outdoors)

The smaller the gap between minAutoExposure & maxAutoExposure, the less the auto exposure tries to auto adjust to the scene's lighting conditions.

Parameters

exposure	Exposure in EV. Valid range is [-inf; inf] Low values will make the picture darker. Higher values will make the picture brighter.
minAutoExposure	It's in EV stops. Valid range is [-inf; inf] Must be minAutoExposure <= maxAutoExposure Controls how much auto exposure darkens a bright scene.

To prevent that looking at a very bright object makes the rest of the scene really dark, use higher values.

Parameters

maxAutoExposure

It's in EV stops. Valid range is [-inf; inf] Must be minAutoExposure <= maxAutoExposure Controls how much auto exposure brightens a dark scene.

To prevent that looking at a very dark object makes the rest of the scene really bright, use lower values.

setSkyColour()

void Demo::HdrUtils::setSkyColour ( const Ogre::ColourValue &  colour, float  multiplier, Ogre::CompositorWorkspace *  workspace  )

static

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

• blam/components/3rdparty/ogre2/Utils/HdrUtils.h
• blam/components/3rdparty/ogre2/Utils/HdrUtils.cpp