GLPOLYGONOFFSET(3G)GLPOLYGONOFFSET(3G)NAME
glPolygonOffset - set the scale and units used to calculate depth values
C SPECIFICATION
void glPolygonOffset( GLfloat factor,
GLfloat units )
PARAMETERS
factor Specifies a scale factor that is used to create a variable depth offset for each polygon. The initial value is 0.
units Is multiplied by an implementation-specific value to create a constant depth offset. The initial value is 0.
DESCRIPTION
When GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, or GL_POLYGON_OFFSET_POINT is enabled, each fragment's depth value will be offset
after it is interpolated from the depth values of the appropriate vertices. The value of the offset is factor*DZ + r*units, where DZ is a
measurement of the change in depth relative to the screen area of the polygon, and r is the smallest value that is guaranteed to produce a
resolvable offset for a given implementation. The offset is added before the depth test is performed and before the value is written into
the depth buffer.
glPolygonOffset is useful for rendering hidden-line images, for applying decals to surfaces, and for rendering solids with highlighted
edges.
NOTES
glPolygonOffset is available only if the GL version is 1.1 or greater.
glPolygonOffset has no effect on depth coordinates placed in the feedback buffer.
glPolygonOffset has no effect on selection.
ERRORS
GL_INVALID_OPERATION is generated if glPolygonOffset is executed between the execution of glBegin and the corresponding execution of glEnd.
ASSOCIATED GETS
glIsEnabled with argument GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, or GL_POLYGON_OFFSET_POINT.
glGet with argument GL_POLYGON_OFFSET_FACTOR or GL_POLYGON_OFFSET_UNITS.
SEE ALSO
glDepthFunc, glEnable, glGet, glIsEnabled
GLPOLYGONOFFSET(3G)
Check Out this Related Man Page
GLPOLYGONOFFSET(3G)GLPOLYGONOFFSET(3G)NAME
glPolygonOffset - set the scale and units used to calculate depth values
C SPECIFICATION
void glPolygonOffset( GLfloat factor,
GLfloat units )
PARAMETERS
factor Specifies a scale factor that is used to create a variable depth offset for each polygon. The initial value is 0.
units Is multiplied by an implementation-specific value to create a constant depth offset. The initial value is 0.
DESCRIPTION
When GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, or GL_POLYGON_OFFSET_POINT is enabled, each fragment's depth value will be offset
after it is interpolated from the depth values of the appropriate vertices. The value of the offset is factor*DZ+r*units, where DZ is a
measurement of the change in depth relative to the screen area of the polygon, and r is the smallest value that is guaranteed to produce a
resolvable offset for a given implementation. The offset is added before the depth test is performed and before the value is written into
the depth buffer.
glPolygonOffset is useful for rendering hidden-line images, for applying decals to surfaces, and for rendering solids with highlighted
edges.
NOTES
glPolygonOffset is available only if the GL version is 1.1 or greater.
glPolygonOffset has no effect on depth coordinates placed in the feedback buffer.
glPolygonOffset has no effect on selection.
ERRORS
GL_INVALID_OPERATION is generated if glPolygonOffset is executed between the execution of glBegin and the corresponding execution of glEnd.
ASSOCIATED GETS
glIsEnabled with argument GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, or GL_POLYGON_OFFSET_POINT.
glGet with argument GL_POLYGON_OFFSET_FACTOR or GL_POLYGON_OFFSET_UNITS.
SEE ALSO glDepthFunc(3G), glEnable(3G), glGet(3G), glIsEnabled(3G)GLPOLYGONOFFSET(3G)
Manufacturer Links
General Information
Home Page: IBM United States
Documentation/Information: IBM System p - UNIX servers: Support and services
pSeries and AIX Information Center
Developerworks AIX Wiki: AIX Wiki
AIX for System Administrators
In-depth information from IBM:
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