Changeset 4649 for OpenSceneGraph/trunk/examples/osgprerender/osgprerender.cpp

Timestamp:

11/01/05 20:32:26 (8 years ago)

Author:

robert

Message:

Added an image negation callback to the render to image. Added commandline docs
for the new --image and --texture-rectangle options.

Files:

• OpenSceneGraph/trunk/examples/osgprerender/osgprerender.cpp (modified) (3 diffs)

OpenSceneGraph/trunk/examples/osgprerender/osgprerender.cpp

@@ -120 +120 @@
         if (_image && _image->getPixelFormat()==GL_RGBA && _image->getDataType()==GL_UNSIGNED_BYTE)
         {
-            
             // we'll pick out the center 1/2 of the whole image,
             int column_start = _image->s()/4;
@@ -135 +134 @@
                 for(int c=column_start; c<column_end; ++c)
                 {
-                    (*data) = 255; ++data;
-                    (*data) = (*data); ++data;
-                    (*data) = (*data); ++data;
+                    (*data) = 255-(*data); ++data;
+                    (*data) = 255-(*data); ++data;
+                    (*data) = 255-(*data); ++data;
                     (*data) = 255; ++data;
                 }
@@ -347 +346 @@
     arguments.getApplicationUsage()->addCommandLineOption("--pbuffer","Use Pixel Buffer for render to texture, where supported.");
     arguments.getApplicationUsage()->addCommandLineOption("--window","Use a seperate Window for render to texture.");
-    arguments.getApplicationUsage()->addCommandLineOption("--width","Set the width of the render to texture");
-    arguments.getApplicationUsage()->addCommandLineOption("--height","Set the height of the render to texture");
+    arguments.getApplicationUsage()->addCommandLineOption("--width","Set the width of the render to texture.");
+    arguments.getApplicationUsage()->addCommandLineOption("--height","Set the height of the render to texture.");
+    arguments.getApplicationUsage()->addCommandLineOption("--image","Render to an image, then apply a post draw callback to it, and use this image to update a texture.");
+    arguments.getApplicationUsage()->addCommandLineOption("--texture-rectangle","Use osg::TextureRectangle for doing the render to texure to.");
    
     // construct the viewer.