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Crashes due to bad dm face calculation in particle RNA/cycles hair.
This stuff is a total mess, but this kind of check is used in other
places and prevents crashing at least.
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Just hide it in this case, the material slot is not really valid without an
object in the context.
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Reviewed By: brecht
Differential Revision: http://developer.blender.org/D99
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materials.
Also fix material slot index not being properly initialized to 1, this got clamped
from zero only on drawing the UI.
Reviewed By: brecht
Differential Revision: http://developer.blender.org/D55
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Williamson. Thanks!
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used elsewhere.
also minor style cleanup.
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might not want (even though in general I think its an improvement).
split this into 2 options, added 'Normal-Tangent' orientation that makes the mesh orient towards the tangent, otherwise it uses Z-Up as before.
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The Emission panel now has a Use Modifier Stack option to emit particles from
the mesh with modifiers applied. Previously particles would only be emitted from
faces that exist in the original mesh. There are some caveats however:
http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.68/Tools#Particles
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* Editing number of segments for particle hair did not update the viewport.
* Hidden particles were confusing, the paths were drawn but without the points.
Now it draws the path faded to indicate that they are hidden/locked.
* Select tips/roots operators now have options to select/deselect/toggle/invert.
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you can specify precision=0 for this, and use -1 for the default 2.
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Also done a few cleanup here and there...
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Gazzán and S. Lockal for spotting them!
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besides performance in some cases.
* DAG_scene_sort is now removed and replaced by DAG_relations_tag_update in
most cases. This will clear the dependency graph, and only rebuild it right
before it's needed again when the scene is re-evaluated.
This is done because DAG_scene_sort is slow when called many times from
python operators. Further the scene argument is not needed because most
operations can potentially affect more than the current scene.
* DAG_scene_relations_update will now rebuild the dependency graph if it's not
there yet, and DAG_scene_relations_rebuild will force a rebuild for the rare
cases that need it.
* Remove various places where ob->recalc was set manually. This should go
through DAG_id_tag_update() in nearly all cases instead since this is now
a fast operation. Also removed DAG_ids_flush_update that goes along with
such manual tagging of ob->recalc.
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* Removed "rotfrom" from particle RNA/DNA, was not used anywhere.
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render thread,
and rename ToggleRender to set_resolution to follow RNA conventions.
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Addition of a RNA function to toggle between the hair settings and rebuild the cache. This enables the usage of the render step, child number and full display percentage with f12 rendering.
A scaling to the strand radius has also been added for the static bvh. This only matches up with dynamic for uniform scaling.
A very small fix is included for multiple uvs/vertex colours when using child particles.
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Added export of multiple UV coordinates and vertex colour attributes.
A debugging option to export the strands without using the cache has also been removed.
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rendering.
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be speed of sound squared; now just speed of sound.
The classical SPH solver was not in 2.65, so this change is unlikely to affect many users. But beta users who have been trying it out will need to change the stiffness parameter to sqrt(old value).
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for triangle mesh hair.
I have also included a small speedup for the intersection test.
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checker script detects this now so easy to detect this if new code is added that doesnt follow blenders style.
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Patch [#33445] - Experimental Cycles Hair Rendering (CPU only)
This patch allows hair data to be exported to cycles and introduces a new line segment primitive to render with.
The UI appears under the particle tab and there is a new hair info node available.
It is only available under the experimental feature set and for cpu rendering.
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http://projects.blender.org/tracker/index.php?func=detail&aid=29681&group_id=9&atid=127
The solver was mostly implemented by John Mansour at VPAC, with help from me and with funding from the AutoCRC. The SPH formulation is due to Gingold and Monaghan, and the smoothing kernel is due to Wendland.
This solver does not replace the old one; it is available as an option. Note that the new solver uses different units than the old one. The patch page has a couple of attachments that can be used to test the new solver, particularly sphclassical_dam_s0.01_grav.blend (ignore the earlier tests). The simulation in that file compares well with a physical experimental dam break; details in a paper by Changhong Hu and Makoto Sueyoshi, also referred to on that page.
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the time step size) for fluid simulations. Previously, the "subframes" parameter was not available when the adaptive time step was enabled; now they can both be set. The two settings can be used together to greatly increase simulation stability.
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checking >= 0.
also remove unused bmesh decimator code.
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another exception to UI messages spellchecker! Thanks to Lockal for pointing this.
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After 2.63 there was a bugfix to take object scale into account for the duplicated
objects, but this breaks compatibility on earlier files. Now there is an option to
control if the scale should be used or not.
Scale is used by default on newer files, and not used on older ones.
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tools...).
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