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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-11-08 12:31:36 -0600 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-11-08 12:31:36 -0600 |
| commit | d796c9dd933ab96ec83b9a634feedd5d32e1ba3f (patch) | |
| tree | 6e3dcca4f77e20ec8966c666aac7c35bd4704053 /examples/opengl/overlay/README | |
| download | tqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.tar.gz tqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.zip | |
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
Diffstat (limited to 'examples/opengl/overlay/README')
| -rw-r--r-- | examples/opengl/overlay/README | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/examples/opengl/overlay/README b/examples/opengl/overlay/README new file mode 100644 index 000000000..f08e539d2 --- /dev/null +++ b/examples/opengl/overlay/README @@ -0,0 +1,9 @@ + +The overlay example + +This example program shows how to use OpenGL overlays with the Qt OpenGL +Extension. It contains a QGLWidget with a relatively expensive +redrawing operation, and rubber-band drawing in the overlay plane. +Using the overlay has the advantage that the rubber-band may be drawn +and erased without damaging the image in the main plane, so costly +redraws are avoided. |