From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/opengl-overlay-example.html | 52 ++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 doc/html/opengl-overlay-example.html (limited to 'doc/html/opengl-overlay-example.html') diff --git a/doc/html/opengl-overlay-example.html b/doc/html/opengl-overlay-example.html new file mode 100644 index 0000000..4042573 --- /dev/null +++ b/doc/html/opengl-overlay-example.html @@ -0,0 +1,52 @@ + + + + + +OpenGL Overlay Example + + + + + + + +

OpenGL Overlay Example

+ + +

+This example demonstrates how to use OpenGL overlays with the Qt OpenGL +Extension. It features 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. +

See $QTDIR/examples/opengl/overlay for the source code. +