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workaround for view3d datamask not being correct on opengl render.
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in the append operator.
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- BLO_blendhandle_get_datablock_names() now takes an arg for the total items in the list, saves the caller counting.
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algorithm remains
the same, but big changes have happened both on the outside and on the inside.
New UI:
* The old parameters were quite true to the underlying algorithm, but were quite obscure
from a users point of view. Now there are only a few intuitive basic parameters that
define the basic fluid behavior.
** By default particle size is now used to determine the interaction radius, rest
density and spring rest lengths so that it's easy to get stable simulations by simply
emitting particles for a few frames and adjusting the particle size (easy when the
particle size is drawn) so that the fluid appears continuous (particles are touching
eachother).
** Stiffness - in reality most fluids are very incompressible, but this is a very hard
problem to solve with particle based fluid simulation so some compromises have to be
made. So the bigger the stiffness parameter is the less the fluid will compress under
stress, but the more substeps are needed for stable simulation.
** Viscosity - how much internal friction there is in the fluid. Large viscosities also
smooth out instabilities, so less viscous fluids again need more substeps to remain
stable.
** Buoancy - with high buoancy low pressure areas inside the fluid start to rise against
gravity, and high pressure areas start to come down.
* In addition to these basic parameters there are separate advanced parameters that can
either be tweaked relative to the basic parameters (or particle size) or defined
independently.
** Repulsion - the stiffness parameter tries to keep the fluid density constant, but this
can lead to small clumps of particles, so the repulsion keeps the particles better
separated.
** Stiff viscosity - the normal viscosity only applies when particles are moving closer to
eachother to allow free flowing fluids. Stiff viscosity also applies smoothing to
particles that are moving away from eachother.
** Interaction radius - by default this is 4 * particle size.
** Rest density - by default this is a density that the particles have when they're packed
densely next to eachother.
** Spring rest length - by default this is 2 * particle size.
* There are also new options for 3d view particle coloring in the display panel to show
particle velocity and acceleration. These make it easier to see what's happening in the
fluid simulations, but can of course be used with other particles as well.
* Viscoelastic springs have some new options too. The plasticity can now be set to much
higher values for instant deletion of springs as the elastic limit is exeeded. In addition
to that there is an option to only create springs for a certain number of frames when a
particle is born. These options give new possibilities for breaking viscoelastic fluids.
New in the code:
* Most of the fluids code is now thread safe, so when particle dynamics go threaded there
will be a nice speed boost to fluids as well.
* Fluids now use a bvh-tree instead of a kd-tree for the neighbor lookups. The bvh-tree
implementation makes the code quite a bit cleaner and should also give a slight speed
boost to the simulation too.
* Previously only force fields were calculated with the different integration methods, but
now the fluid calculations are also done using the selected integration method, so there
are again more choices in effecting simulation accuracy and stability. This change also
included a nice cleanup of the whole particle integration code.
As the internals are pretty stirred up old particle fluid simulations will probably not
work correctly straight away, but with some tweaking the same level of control is still
available by not using the "relative versions" of the advanced parameters (by default these
are not used when loading old files).
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* Removed some fields from struct SculptSession:
- Fields drawobject, projverts, and previous_r were completely
unused
- Field `ob' was really unnecessary, changed sculpt functions
to pass the object rather than the SculptSession
This removal of `ob' from SculptSession should should make it a little
easier to continue generalizing paint/sculpt functionality.
There should be no visible changes from cleanup.
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More problems with Undo and Render Slots (Image editor)
- Undo storage for operator is now back, but only when new
buffers were added (not when viewing existing)
- A real bug: On undo/redo, the stored buffers were never
retrieved, but always freed entirely.
Note however that when you undo back to a state before you
rendered (or added slots), the render buffers that didn't
exist back then also get freed. A redo doesn't bring it back.
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run do_versions() on use_rim_material option so Sintel's jacket loads ok.
(request from Bassam)
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the strength of the brush, as it was in 2.49
Layer height used to be controlled with brush radius, quite confusing decision.
Added new property for brushes - height for adjusting affectable brush height
(it could be not only layer height in the future).
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update. Please reset the simulation.
* Backwards compatibility code wasn't forwards compatible :)
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sockets or adding custom sockets by name and type (fixes #26171). Changed a few function names for groups for consistency.
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Was trying to free audio data from sequencer strips that don't even have audio. Corrected the error in several ways so this will definitely not happen again :-)
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updated in future.
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lib_nodetree_do_versions_group.
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sockets. do_versions is running before the lib_verify_nodetree function updates socket lists of nodes. This means that when adding unlinked sockets in do_versions to restore older node groups, the new sockets are not taken into account. To fix this a temporary node tree flag has been introduced, which delays actual group socket do_version until the group tree internal nodes have been updated. After that the unlinked group sockets are exposed (like old node groups did), then the external sockets look up the new index, so that external links to group instances are preserved.
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of input/output sockets. Those can be linked to internal nodes just like links between regular nodes. In addition group sockets can be renamed and have a defined order, which can be modified, and they can be removed again.
More details can be found in the patch tracker description (#24883) and on the code.blender.org development blog.
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- rename layout.operator_enums -> operator_enum (since we have operator_menu_enum, only called in 4 places)
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more sensible in the output.
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python functions.
- use NULL rather then 0 where possible (makes code & function calls more readable IMHO).
- set static variables and functions (exposed some unused vars/funcs).
- use func(void) rather then func() for definitions.
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mostly replace strcpy with BLI_strncpy and multiple strcat's with a BLI_snprintf().
also fix possible crash if CWD isnt available.
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* Effecting particle properties with textures was possible in 2.49,
but not in 2.5 anymore.
* Now particles have their own textures (available in texture panel
for objects with particle systems), which are totally separate from
the material textures.
* Currently a basic set of particle properties is available for
texture control. Some others could still be added, but the whole
system is not intended as an "change anything with a texture" as
this kind of functionality will be provided with node particles in
the future much better.
* Combined with the previously added "particle texture coordinates"
this new functionality also solves the problem of animating particle
properties through the particle lifetime nicely.
* Currently the textures only use the intensity of the texture in
"multiply" blending mode, so in order for the textures to effect
a particle parameter there has to be a non-zero value defined for
the parameter in the particle settings. Other blend modes can be
added later if they're considered useful enough.
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- reading pointcache was using an incorrect, always NULL variable.
- commented NDof code, was giving warnings and isnt used now.
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-> 2.50
Actionified ShapeKey IPO-blocks (i.e. "Shape Key Actions") would have
an action channel with the hardcoded name, "Shape", and this action
would be assigned to Object level (although ShapeKey blocks had their
own IPO-block slot, only Objects could have actions, so actionifying
ShapeKey IPO-blocks would wrap a ShapeKey block's IPO's to an Object-
level action).
Hence, the path conversions code would wrongly interpret this action
channel as referring to a Pose Channel instead, thus creating some
invalid paths with a 'pose.bones["Shape"]' prefix wrongly getting
tacked on. To ensure that the converted animation can work out of the
box, a 'data.shape_keys' prefix is now used instead so that these
actions can still be Object-rooted while still being able to correctly
control the Shape Keys. This is because there's no easy way to
identify and then shift such action from Object-level to ShapeKey-
level within the conversion code. The consequence though is that such
converted ShapeKey actions CAN ONLY BE USED THROUGH OBJECT LEVEL (i.e.
via Action NOT ShapeKey editor).
Secondly, the Action/ShapeKey editor version patching code has been
modified so that if a ShapeKey editor view was active when loading an
old 2.4x file, the action gets cleared from the view. This is because
of this didn't make semantic sense: the ShapeKey editor is for
ShapeKey-rooted actions, while the Action Editor is for Object-rooted
actions. The converted files though let Object-level actions be shown
in either one.
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- BGE was getting MCol array and not using it.
- use list lookup functions for getting constraint from pose bone.
- use const char * in more places.
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ensure quat, delta rotation is set to a unit quaternion on older files.
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Patch #25901 by Tobias Oelgarte.
Bone transformations would be converted back and forth between different
representations when changing modes, which due to numerical errors could
lead to bone transformations slowly changing as you edit the armature.
Now the editmode head, tail and roll values are stored in bones and used
directly when entering edit mode. Head and tail were already there but
now we ensure they are the exact same value, roll was not yet there, so
we have a version patch for it.
The sub version was incremented to 1 for the version patch.
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Migrating "redraws" settings from TimeLine view data to per Screen.
The options are now still shown in the TimeLine "Playback" menu
though.
This means that whatever redraw settings you set in a TimeLine editor
will be used throughout a screen (i.e. editor layout) to determine
which editors will get updated during playback, instead of only
certain editors doing certain things at vague times.
---
Also, I moved some version patches pre 2.56 version bump into a
version-check for 2.56. These must've been missed when doing the
release...
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.blend1 etc backups.
Proves again that lazy coders only make bad code :)
Implementation note:
The filewindow now recoginizes .blend version backups as
a special type, so filtering for .blend files themselves
ignores it. However, they're recognized correctly as valid
.blend files, and draw an icon as .blend file when filtering
is off. Can become a distinct icon if we want...
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window caused .blend itself to be not seen :) Mea Maxima Culpa!
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for drop inside Blender window and icons. (.blend1, .blend2, etc).
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oldbump -> original
newbump -> compatible
*new* -> default (3tap)
*new* -> best quality (5tap)
the latter two have an option to apply bumpmapping in
viewspace - much like displacement mapping
objectspace - default (scales with the object)
texturespace - much like normal mapping (scales)
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*nix with non-standard libjpeg/png/zlib locations was broken.
in the case of python this makes it easier to move to find_package(PythonLibs) when 3.x is supported.
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+ other minor changes.
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properly
* Now the old cache is just freed so that new calculations can be done.
* The particle dynamics regression test files should display correctly now.
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check and checking against incorrect pointer before use).
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Missing check for id-block users before saving
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Texture nodes, the Image node didn't get initialized on load.
This caused the node to refuse accepting a new Image if a
file couldn't be found on saving.
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do_versions.
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some other compiler warnings with recent commits.
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earlier, don't know why I didn't notice these before.
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Whitehorn (chickencoop)
* Viscoelastic springs between the fluid particles can simulate all kinds
of viscous and elastic substances, such as jelly and honey. This is
achieved by creating springs dynamically between neighboring particles
and adjusting their rest length based on stretching/compression.
* This nearly completes the currently intended functionality for particle
fluids. The last missing thing is a surfacing extraction algorithm,
which is needed for a proper representation of a sph fluid.
* I also cleaned up and renamed some of the fluid parameters to make the
ui a bit easier to understand.
* One addition to the patch is an option to use "initial rest length" for
the springs, which uses the lengths between the particles at the time of
spring creation as the spring rest lengths instead of interaction radius/2.
This makes the fluid keep it's original shape better (good for very
viscoelastic materials), but can create large density differences inside
the fluid (not really physically correct for a fluid).
* Viscoelastic springs are stored in point cache as extra data.
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* Not strictly necessary right now, but better for future.
* Struct data (only boids at the moment) is now written as structs (with dna) so they work between 64 and 32 bit machines too.
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