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The following table lists IRIS GL antialiasing functions and their equivalent OpenGL functions.
| IRIS GL function | OpenGL function | Meaning |
|---|---|---|
| pntsmooth | glEnable ( GL_POINT_SMOOTH ) | Enables antialiasing of points. |
| linesmooth | glEnable( GL_LINE_SMOOTH ) | Enables antialiasing of lines. |
| polysmooth | glEnable ( GL_POLYGON_SMOOTH ) | Enables antialiasing of polygons. |
Use the equivalent glDisable calls to turn off antialiasing.
In IRIS GL, you can control the quality of the antialiasing by calling:
linesmooth(SML_ON + SML_SMOOTHER);
OpenGL provides similar controluse glHint:
glHint(GL_POINT_SMOOTH_HINT, hintMode);
glHint(GL_LINE_SMOOTH_HINT, hintMode);
glHint(GL_POLYGON_SMOOTH_HINT, hintMode);
where hintMode is one of the following:
- GL_NICEST (Use the highest quality smoothing.)
- GL_FASTEST (Use the most efficient smoothing.)
- GL_DONT_CARE
IRIS GL also permits end-correction by calling:
linesmooth(SML_ON + SML_END_CORRECT);
OpenGL has no equivalent for this function.