VolVis::VolumeRendering::Compositing Class Reference

#include <Compositing.h>

Inheritance diagram for VolVis::VolumeRendering::Compositing:

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Detailed Description

This render mode implements the compositing rendering which has been presented by Levoy. The values obtained by raycasting are composited in front-to-back-order until an opacity of 1 has been reached.

Public Member Functions
	Compositing (Raycasting *raycasting)
void	enableDepthCueing (bool enable)
void	enablePhong (bool enable)
void	render ()
void	setDepthCueing (double k1, double k2)
void	setStochasticJittering (double factor)

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Constructor & Destructor Documentation

VolVis::VolumeRendering::Compositing::Compositing

(

Raycasting *

raycasting

)

Constructor. Binds the raycasting object and loads the needed shaders.

Parameters:

raycasting

this implements the raycasting algorithm

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Member Function Documentation

void VolVis::VolumeRendering::Compositing::enableDepthCueing

(

bool

enable

)

Depth cueing attenuates the color and alpha according to the distance of a voxel to the image plane.

Parameters:

enable

if true, depth cueing is enabled, otherwise it is disabled

void VolVis::VolumeRendering::Compositing::enablePhong

(

bool

enable

)

The phong reflection model can be applied for a compositing rendering, which enforces the three dimensional appearance. The parameters (light source, reflection parameters) are stored in the Raycasting object.

Parameters:

enable

if true, the phong reflection model is applied, otherwise the volume is drawn flat.

void VolVis::VolumeRendering::Compositing::render

(

)

[virtual]

Updates shader parameters and renders an image plane. Raycasting is done within a shader.

Implements VolVis::VolumeRendering::Rendering.

void VolVis::VolumeRendering::Compositing::setDepthCueing	(	double	k1,
		double	k2
	)

Defines the parameters for depth cueing. Depth cueing is calculated with 1.0/(k1 + k2*distance).

Parameters:

	k1	part of depth cueing which is independent from distance
	k2	part of depth cueing which depends on the distance to the image plane

void VolVis::VolumeRendering::Compositing::setStochasticJittering

(

double

factor

)

Stochastic jittering adds a little offset from a noise texture to each ray. This can enhance the visual appearance by avoiding woodgrain artifacts.

Parameters:

factor

a value between 0 and 1. With a value of zero the jittering is disabled.

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

• Compositing.h

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