Blender Git Commits

commented out a debugging message... was getting errors about cast to int
losses percision on 64bit linux with gcc4.X

Kent

Restored the free_imbuf_seq_except() in sequencer, to free all memory
of sequencer, except current frame. Apparently the cache limitor doesnt
work for floatbuffers yet... and while rendering, I prefer to have all
memory available for the render itself.

Schlaile; you might check on what is wrong, in case imbufs have have
a rect_float or zbuf_float, the cache doesnt work yet?

Added a few more button align's

Recoded Panorama rendering.

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).

Made vertex clear work for selected faces from the menu, to be the same as Shift+K.
Also makde Shift+K work in weightpaint mode.

- elbeem.h header file was missing

- typo in SConscript

Sorry for the big commit, but I've been fixing many of these
issues in parallel... So this commit contains: an update of
the solver (e.g. moving objects), integration of blender IPOs,
improved rendering (motion blur, smoothed normals) and a first particle
test. In more detail:

Solver update:
- Moving objects using a relatively simple model, and not yet fully optimized - ok
for box falling into water, water in a moving glass might cause trouble. Simulation
times are influenced by overall no. of triangles of the mesh, scaling meshes up a lot
might also cause slowdowns.
- Additional obstacle settings: noslip (as before), free slip (move along wall freely)
and part slip (mix of both).
- Obstacle settings also added for domain boundaries now, the six walls of the domain are
obstacles after all as well
- Got rid of templates, should make compiling for e.g. macs more convenient,
for linux there's not much difference. Finally got rid of parser (and some other code
parts), the simulation now uses the internal API to transfer data.
- Some unnecessary file were removed, the GUI now needs 3 settings buttons...
This should still be changed (maybe by adding a new panel for domain objects).

IPOs:
- Animated params: viscosity, time and gravity for domains. In contrast
to normal time IPO for Blender objects, the fluidsim one scales the time
step size - so a constant 1 has no effect, values towards 0 slow it down,
larger ones speed the simulation up (-> longer time steps, more compuations).
The viscosity IPO is also only a factor for the selected viscosity (again, 1=no effect).
- For objects that are enabled for fluidsim, a new IPO type shows up. Inflow
objects can use the velocity channels to animate the inflow. Obstacles, in/outflow
objects can be switched on (Active IPO>0) and off (<0) during the simulation.
- Movement, rotation and scaling of those 3 types is exported from the normal
Blender channels (Loc,dLoc,etc.).

Particles:
- This is still experimental, so it might be deactivated for a
release... It should at some point be used to model smaller splashes,
depending on the the realworld size and the particle generation
settings particles are generated during simulation (stored in _particles_X.gz
files).
- These are loaded by enabling the particle field for an arbitrary object,
which should be given a halo material. For each frame, similar to the mesh
loading, the particle system them loads the simulated particle positions.
- For rendering, I "abused" the part->rt field - I couldnt find any use
for it in the code and it seems to work fine. The fluidsim particles
store their size there.

Rendering:
- The fluidims particles use scaled sizes and alpha values to give a more varied
appearance. In convertblender.c fluidsim particle systems use the p->rt field
to scale up the size and down the alpha of "smaller particles". Setting the
influence fields in the fluidims settings to 0 gives equally sized particles
with same alpha everywhere. Higher values cause larger differences.
- Smoothed normals: for unmodified fluid meshes (e.g. no subdivision) the normals
computed by the solver are used. This is basically done by switching off the
normal recalculation in convertblender.c (the function calc_fluidsimnormals
handles other mesh inits instead of calc_vertexnormals).
This could also be used to e.g. modify mesh normals in a modifier...
- Another change is that fluidsim meshes load the velocities computed
during the simulation for image based motion blur. This is inited in
load_fluidsimspeedvectors for the vector pass (they're loaded during the
normal load in DerivedMesh readBobjgz). Generation and loading can be switched
off in the settings. Vector pass currently loads the fluidism meshes 3 times,
so this should still be optimized.

Examples:
- smoothed normals versus normals from subdividing once:
http://www10.informatik.uni-erlangen.de/~sinithue/temp/v060227_1smoothnorms.png
http://www10.informatik.uni-erlangen.de/~sinithue/temp/v060227_2subdivnorms.png
- fluidsim particles, size/alpha influence 0:
http://www10.informatik.uni-erlangen.de/~sinithue/temp/v060227_3particlesnorm.png
size influence 1:
http://www10.informatik.uni-erlangen.de/~sinithue/temp/v060227_4particlessize.png
size & alpha influence 1:
http://www10.informatik.uni-erlangen.de/~sinithue/temp/v060227_5particlesalpha.png
- the standard drop with motion blur and particles:
http://www10.informatik.uni-erlangen.de/~sinithue/temp/elbeemupdate_t2new.mpg
(here's how it looks without
http://www10.informatik.uni-erlangen.de/~sinithue/temp/elbeemupdate_t1old.mpg)
- another inflow animation (moving, switched on/off) with a moving obstacle
(and strong mblur :)
http://www10.informatik.uni-erlangen.de/~sinithue/temp/elbeemupdate_t3ipos.mpg

Things still to fix:
- rotating & scaling domains causes wrong speed vectors
- get rid of SDL code for threading, use pthreads as well?
- update wiki documentation
- cool effects for rendering would be photon maps for caustics,
and motion blur for particles :)

new emptys now have default settings for new emptys.

Applied JMS's Patch. for better Python Dupli Access.
Made some fixes and changes.
* The matricies returned were wrapped. Wrapping Display Mesh matricies segfaulted sometimes. - Made a copy instead.
* Added 1 missing epydoc from the patch.
* Renamed getDupliMatrices to getDupliObjects, and changed to return a list of (object, matrix) tuples instead of just the matrix. This is much more usefull because it allows python to know what objects are used for dupliGroups and for dupliverts where there is more then 1 child. also cleaned up this function a bit.

pthreads for Makefiles/cygwin (don't forget to update lib/windows).

removed typos causing MTL loading to fail.

==SCons==
+ SCons support for pthreads-win32. Library will be committed shortly into
lib/windows, so be sure to check commit list and update that as well
when the pthread lib is available.

converted sqrtf to SimdSqrt Solaris has no sqrtf.

Kent

Bugfix: CTRL+select on a Bone, while in editmode Curve, crashed.

Replacing SDL threads with pthread.

For some reason I thought SDL thread handling would be much simpler... but
the migration to posix pthread went very smooth and painless. Less code
even, and I even notice a slight performance increase!

All threading code is still wrapped in blenlib/intern/threads.c
Only real change was making the callback functions to return void pointer,
instead of an int.

The mutex handling is also different... there's no test anymore if a
mutex was initialized, which is a bit confusing. But it appears to run
all fine still. :)

Nathan Letwory has been signalled already to provide the Windows pthread
library and make/scons linking. For MSVC we might need help from someone
else later though.

==SCons==
* Use same warning flags as with linux2, greatly reducing noise in
output during compile. Also for developers using win32/mingw now
in effect: correct *each* and *every* warning in your code. I
command you to!

==SCons==
* Warning flags I had dutifully copied from sirdudes yet unpublished
make rewrite turned out to be the Paranoia flags, causing the flood
of warnings. Using better flags instead (like current Makefile level 1).

All developers on Linux that use SCons for building - (new) code you write is
supposed to be *entirely* warning-free from now on (Ton said so!)

==SCons==
* compile game-engine libs only when actually enabled

I had to disable mmap altogether for Irix.