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blocks that were previously missed; and b) greatly increase my
ohloh stats!
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The old implementation was added quite hackish (talking about 10 yr ago).
You also had to make a small image slice, which was extended Xparts in
size. That also required to adjust the camera angle. Very clumsy.
Now; when enabling the Panorama option, it will automatically apply the
panorama effect on the vertically aligned tiles. You can just enable or
disable the "Pano" button, to get a subtle lens effect like this:
(without pano)
http://www.blender.org/bf/rt.jpg
(with pano)
http://www.blender.org/bf/rt1.jpg
For Panorama render, the minimum slice size has been hardcoded to be 8
pixels. The XParts button goes up to 512 to allow that. In practice,
rendering 64 slices will already give very good images for a wide angle
lens of 90 degrees, the curvature of straight lines then is equal to
a circle of 256 points.
Rendering a full 360 degree panorama you do by creating an extreme wide
angle camera. The theory says camera-lens 5 should do 360 degrees, but
for some reason my tests reveil it's 5.1... there's a rounding error
somewhere, maybe related to the clipping plane start? Will look at that
later. :)
Also note that for each Xpart slice, the entire database needs to be
rotated around camera to correct for panorama, on huge scenes that might
give some overhead.
Threaded render goes fine for Panorama too, but it can only render the
vertically aligned parts in parallel. For the next panorama slice it has
to wait for all threads of the current slice to be ready.
On reading old files, I convert the settings to match as closely as
possible the new situation.
Since I cannot bump up the version #, the code detects for old panorama
by checking for the image size. If image width is smaller than height, it
assumes it's an old file (only if Panoroma option was set).
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+ the code in writemovie.c no longer compiles (since the renderer
refactor). I have #if 0-ed it.
+ OpenGL on Irix doesn't have GL_ARB_vertex_program
+ mmap on Irix doesn't like MAP_ANON.
+ If using the MipsPro 7.3 compiler, the variable MIPS73_ISOHEADERS
can be set to point to the directory with those weird C++ headers
that don't have .h in the name
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A full detailed description of this will be done later... is several days
of work. Here's a summary:
Render:
- Full cleanup of render code, removing *all* globals and bad level calls
all over blender. Render module is now not called abusive anymore
- API-fied calls to rendering
- Full recode of internal render pipeline. Is now rendering tiles by
default, prepared for much smarter 'bucket' render later.
- Each thread now can render a full part
- Renders were tested with 4 threads, goes fine, apart from some lookup
tables in softshadow and AO still
- Rendering is prepared to do multiple layers and passes
- No single 32 bits trick in render code anymore, all 100% floats now.
Writing images/movies
- moved writing images to blender kernel (bye bye 'schrijfplaatje'!)
- made a new Movie handle system, also in kernel. This will enable much
easier use of movies in Blender
PreviewRender:
- Using new render API, previewrender (in buttons) now uses regular render
code to generate images.
- new datafile 'preview.blend.c' has the preview scenes in it
- previews get rendered in exact displayed size (1 pixel = 1 pixel)
3D Preview render
- new; press Pkey in 3d window, for a panel that continuously renders
(pkey is for games, i know... but we dont do that in orange now!)
- this render works nearly identical to buttons-preview render, so it stops
rendering on any event (mouse, keyboard, etc)
- on moving/scaling the panel, the render code doesn't recreate all geometry
- same for shifting/panning view
- all other operations (now) regenerate the full render database still.
- this is WIP... but big fun, especially for simple scenes!
Compositor
- Using same node system as now in use for shaders, you can composit images
- works pretty straightforward... needs much more options/tools and integration
with rendering still
- is not threaded yet, nor is so smart to only recalculate changes... will be
done soon!
- the "Render Result" node will get all layers/passes as output sockets
- The "Output" node renders to a builtin image, which you can view in the Image
window. (yes, output nodes to render-result, and to files, is on the list!)
The Bad News
- "Unified Render" is removed. It might come back in some stage, but this
system should be built from scratch. I can't really understand this code...
I expect it is not much needed, especially with advanced layer/passes
control
- Panorama render, Field render, Motion blur, is not coded yet... (I had to
recode every single feature in render, so...!)
- Lens Flare is also not back... needs total revision, might become composit
effect though (using zbuffer for visibility)
- Part render is gone! (well, thats obvious, its default now).
- The render window is only restored with limited functionality... I am going
to check first the option to render to a Image window, so Blender can become
a true single-window application. :)
For example, the 'Spare render buffer' (jkey) doesnt work.
- Render with border, now default creates a smaller image
- No zbuffers are written yet... on the todo!
- Scons files and MSVC will need work to get compiling again
OK... thats what I can quickly recall. Now go compiling!
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Credits go to Gernot Ziegler, who originally coded EXR support, and to
Austin Benesh for bringing it further. Kent Mein provided a lot of code
for integrating float buffers in Blender imbuf and ImBuf API cleanup,
and provided Make and Scons and static linking.
At this moment; the EXR libraries are a *dependency*, so you cannot get
the Orange branch compiled without having OpenEXR installed. Get the
(precompiled or sources) stuff from www.openexr.com. Current default is
that the headers and lib resides in /user/local/
Several changes/additions/fixes were added:
- EXR code only supported 'half' format (16 bits per channel). I've added
float writing, but for reading it I need tomorrow. :)
- Quite some clumsy copying of data happened in EXR code.
- cleaned up the api calls already a bit, preparing for more advanced
support
- Zbuffers were saved 16 bits, now 32 bits
- automatic adding of .exr extensions went wrong
Imbuf:
- added proper imbuf->flags and imbuf->mall support for float buffers, it
was created for *each* imbuf. :)
- found bugs for float buffers in scaling and flipping. Code there will
need more checks still
- imbuf also needs to be verified to behave properly when no 32 bits
rect exists (for saving for example)
TODO:
- support internal float images for textures, backbuf, AO probes, and
display in Image window
Hope this commit won't screwup syncing with bf-blender... :/
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- added BLI_str[n]casecmp, use instead of regular versions
- rewrote BLI_str[n]casecmp to not be stupid
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Main target was to make the inner rendering loop using no globals anymore.
This is essential for proper usage while raytracing, it caused a lot of
hacks in the raycode as well, which even didn't work correctly for all
situations (textures especially).
Done this by creating a new local struct RenderInput, which replaces usage
of the global struct Render R. The latter now only is used to denote
image size, viewmatrix, and the like.
Making the inner render loops using no globals caused 1000s of vars to
be changed... but the result definitely is much nicer code, which enables
making 'real' shaders in a next stage.
It also enabled me to remove the hacks from ray.c
Then i went to the task of removing redundant code. Especially the calculus
of texture coords took place (identical) in three locations.
Most obvious is the change in the unified render part, which is much less
code now; it uses the same rendering routines as normal render now.
(Note; not for halos yet!)
I also removed 6 files called 'shadowbuffer' something. This was experimen-
tal stuff from NaN days. And again saved a lot of double used code.
Finally I went over the blenkernel and blender/src calls to render stuff.
Here the same local data is used now, resulting in less dependency.
I also moved render-texture to the render module, this was still in Kernel.
(new file: texture.c)
So! After this commit I will check on the autofiles, to try to fix that.
MSVC people have to do it themselves.
This commit will need quite some testing help, but I'm around!
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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
Just need to finish cpp files now :)
Kent
--
mein@cs.umn.edu
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