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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /examples/opengl/overlay/README | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
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 0000000..f08e539 --- /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. |