#include <vtkSphereSource.h>
#include <vtkSmartPointer.h>
#include <vtkAppendPolyData.h>
#include <vtkCamera.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkProperty.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkTimerLog.h>
#include <vtkTransform.h>
#include <vtkDepthSortPolyData.h>

Functions
vtkSmartPointer< vtkAppendPolyData >	GenerateOverlappingBunchOfSpheres (int theta, int phi)

bool	SetupEnvironmentForDepthPeeling (vtkSmartPointer< vtkRenderWindow > renderWindow, vtkSmartPointer< vtkRenderer > renderer, int maxNoOfPeels, double occlusionRatio)

bool	IsDepthPeelingSupported (vtkSmartPointer< vtkRenderWindow > renderWindow, vtkSmartPointer< vtkRenderer > renderer, bool doItOffScreen)

int	main (int argc, char *argv[])

Function Documentation

vtkSmartPointer<vtkAppendPolyData> GenerateOverlappingBunchOfSpheres	(	int	theta,
		int	phi
	)

Generate a bunch of overlapping spheres within one poly data set: one big sphere evenly surrounded by four small spheres that intersect the centered sphere.

Parameters

theta	sphere sampling resolution (THETA)
phi	sphere sampling resolution (PHI)

Returns: the set of spheres within one logical poly data set

Definition at line 32 of file CorrectlyRenderTranslucentGeometry.cxx.

bool IsDepthPeelingSupported	(	vtkSmartPointer< vtkRenderWindow >	renderWindow,
		vtkSmartPointer< vtkRenderer >	renderer,
		bool	doItOffScreen
	)

Find out whether this box supports depth peeling. Depth peeling requires a variety of openGL extensions and appropriate drivers.

Parameters

renderWindow	a valid openGL-supporting render window
renderer	a valid renderer instance
doItOffScreen	do the test off screen which means that nothing is rendered to screen (this requires the box to support off screen rendering)

Returns: TRUE if depth peeling is supported, FALSE otherwise (which means that another strategy must be used for correct rendering of translucent geometry, e.g. CPU-based depth sorting)

Definition at line 116 of file CorrectlyRenderTranslucentGeometry.cxx.

int main	(	int	argc,
		char *	argv[]
	)

Example application demonstrating correct rendering of translucent geometry. It will automatically detect whether depth peeling is supported by the hardware and software, and will apply depth peeling if possible. Otherwise a fallback strategy is used: depth sorting on the CPU.
Usage: [ProgramName] Theta Phi MaximumPeels OcclusionRatio ForceDepthSortingFlag DoNotUseAnyDepthRelatedAlgorithmFlag
Theta ... spheres' THETA resolution
Phi ... spheres' PHI resolution
MaximumPeels ... maximum number of depth peels (multi-pass rendering) for depth peeling mode
OcclusionRatio ... occlusion ratio for depth peeling mode (0.0 for a perfect rendered image, >0.0 for a non-perfect image which is expected to be slower)
ForceDepthSortingFlag ... force depth sorting even if depth peeling is supported
DoNotUseAnyDepthRelatedAlgorithmFlag ... neither use depth peeling nor depth sorting - just render as usual

Definition at line 180 of file CorrectlyRenderTranslucentGeometry.cxx.

bool SetupEnvironmentForDepthPeeling	(	vtkSmartPointer< vtkRenderWindow >	renderWindow,
		vtkSmartPointer< vtkRenderer >	renderer,
		int	maxNoOfPeels,
		double	occlusionRatio
	)

Setup the rendering environment for depth peeling (general depth peeling support is requested).

See also: IsDepthPeelingSupported()

Parameters

renderWindow	a valid openGL-supporting render window
renderer	a valid renderer instance
maxNoOfPeels	maximum number of depth peels (multi-pass rendering)
occlusionRatio	the occlusion ration (0.0 means a perfect image, >0.0 means a non-perfect image which in general results in faster rendering)

Returns: TRUE if depth peeling could be set up

Definition at line 78 of file CorrectlyRenderTranslucentGeometry.cxx.

Functions

Function Documentation