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--------------- Released version 1.0 beta1 ---------------
1. Bug Fix: vpCreateMinMaxOctree caused a segmentation fault for
volume sizes that were not a power of two.
2. Debug Feature: Added debugging code for compositing calculation.
3. Debug Feature: Added intermediate image coordinates to vpTracePixel
output.
4. Bug Fix: Added a check in vpRamp for non-increasing x coordinates
to prevent a divide-by-zero error.
5. Bug Fix: Added a version of the compositing routine (vp_compAn.m4)
that does not have unrolled loops, since some compilers have
trouble with the unrolled version (too many basic blocks to run the
optimizer in a reasonable amount of time). The unrolled version is
now in vp_compAu.m4 instead of vp_compA.m4. The Makefile can be
modified to choose one or the other version.
6. Feature: Added complete man pages for all library routines.
7. Bug Fix: In vpSetCallback, revert to default behavior if the function
argument is NULL (instead of causing a NULL dereference later on).
8. Feature: Added vpStoreContext and vpLoadContext to save and restore
rendering contexts (and to make it easier to reproduce bugs).
9. Feature: Changed vpLoadRawVolume to memory-map the file if
requested
10. Bug Fix: Fixed missing and incorrect function prototypes.
11. Feature: Changed makefile and headers to use GNU autoconf.
--------------- Released version 1.0 beta2 ---------------
12. Bug Fix: Fixed minus-sign error in formula for depth cueing factor.
This eliminates the brightness changes that occurred when rotating
a volume past a 45 degree point with depth cueing enabled.
13. Debug Feature: Added code to collect rendering statistics for
performance analysis.
14. Debug Feature: Allow negative opacity threshold (to experiment with
disabling the benefit of spatial data structures).
15. Bug Fix: Fixed the result of vpGeti with the VP_VIEW_Y_SIZE
or VP_VIEW_Z_SIZE options.
16. Reorganization and renaming of compositing functions to make it
easier to conditionally compile in just some of the special-case
versions. Also merged code for unrolled loops with code for
non-unrolled loops into one M4 source file.
17. Feature: Added experimental "index volume" code for faster
early-ray termination.
18. Debug Feature: Added define flags to conditionally remove early-ray
termination and resampling loops for performance analysis runs.
19. Feature: Added experimental brute-force raycaster for performance
comparisons.
20. Feature: Implemented shadows.
21. Bug Fix: Added missing return value in vpDestroyClassifiedVolume.
22. Feature: Implemented resampling filters for scaling volume data
(vpSetFilter(), vpResample(), vpBoxFilter(), vpLinearFilter(),
vpBicubicFilter(), vpGaussianFilter()).
23. Feature: Added capability to produce images with a variety of
pixel formats, including an optional alpha channel.
*** INCOMPATIBLE CHANGE TO vpSetImage ***
24. Feature: Changed vpGetImage to produce images with the same
pixel formats supported by vpSetImage, and to allow reading back
the shadow buffer.
*** INCOMPATIBLE CHANGE TO vpGetImage ***
25. Reorganized macros in vp_compA.m4 and vp_warpA.m4.
26. Bug Fix: Refactor view if shadows are turned on.
27. Feature: The callback functions for VP_LOG_ALLOC_FUNC,
VP_LOG_FREE_FUNC and VP_STATUS_FUNC now get one additional
argument, the client_data pointer associated with the context.
28. Bug Fix: Check if intermediate image buffer must be resized
even if view has not changed (since number of color channels
may be different).
29. Feature: Allow clamping to be disabled when computing shading
lookup table (vpShadeTable).
30. Debug Feature: Added options to override default compositing direction
and to retrieve compositing order.
31. Bug Fix: Check for invalid voxel field sizes when using lookup
table shading.
32. Bug Fix: Don't destroy classified volume when raw voxel array
is set to NULL pointer.
33. Bug Fix: Fixed error in vpNormalIndex (also affecting
vpScanlineNormals and vpVolumeNormals) that resulted in incorrect
calculation of isolated surface normals due to a roundoff error.
This sometimes also resulted in index values greater than the
maximum permissible value.
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