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glt/countsrf.h File Reference

Surface Counting Interface. More...

#include <glt/config.h>
#include <glt/gl.h>

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Enumerations
enum	countSurfacesMode { COUNT_SURFACES_ALL, COUNT_SURFACES_99TH_PERCENTILE }
Functions
void	countSurfaces (const GltShape &shape)
	Use the stencil buffer to count the number of surfaces drawn at each pixel.
GLubyte	countSurfaces (const GltShape &shape, const countSurfacesMode mode)
	Use the stencil buffer to count the number of surfaces drawn at each pixel.
GLubyte	countSurfacesVisualise (const GltShape &shape)
	Visualise the number of rendered surfaces at each pixel.
GLuint	stencilHistogram (GLuint histogram[256])
	Extract a stencil buffer histogram for the current viewport.

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Detailed Description

Surface Counting Interface.

Id:

countsrf.h,v 1.7 2002/10/07 16:27:46 nigels Exp

Log:

countsrf.h,v

Revision 1.7 2002/10/07 16:27:46 nigels Added CVS version control info

Definition in file countsrf.h.

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Enumeration Type Documentation

enum countSurfacesMode

Enumeration values: COUNT_SURFACES_ALL  Count the maximum number of surfaces exactly. COUNT_SURFACES_99TH_PERCENTILE  Take the maximum of the 99th percentile, ignoring outliers. Definition at line 44 of file countsrf.h. Referenced by countSurfaces().

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Function Documentation

void countSurfaces (  const GltShape &    shape )

Use the stencil buffer to count the number of surfaces drawn at each pixel. Parameters: shape  Shapes Warning: Uses the current culling configuration Definition at line 28 of file countsrf.cpp. References GltShape::draw(), and GLERROR.

GLubyte countSurfaces (  const GltShape &    shape, const countSurfacesMode    mode )

Use the stencil buffer to count the number of surfaces drawn at each pixel. Parameters: shape  Shapes mode  Count Mode Returns: Maximum number of surfaces covering a pixel Warning: Uses the current culling configuration Definition at line 65 of file countsrf.cpp. References COUNT_SURFACES_99TH_PERCENTILE, COUNT_SURFACES_ALL, countSurfacesMode, GLERROR, and stencilHistogram(). Referenced by countSurfacesVisualise().

GLubyte countSurfacesVisualise (  const GltShape &    shape )

Visualise the number of rendered surfaces at each pixel. Parameters: shape  Shapes Returns: Maximum number of surfaces covering a pixel Warning: Uses the current culling configuration Definition at line 139 of file countsrf.cpp. References COUNT_SURFACES_ALL, countSurfaces(), drawZnear(), GltColor::glColor(), and maxColors.

GLuint stencilHistogram (  GLuint    histogram[256] )

Extract a stencil buffer histogram for the current viewport. Parameters: histogram  Array of GLuint histogram entries Returns: Number of pixels in the current viewport Definition at line 181 of file countsrf.cpp. Referenced by countSurfaces().

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