- Live scanline updates while rendering
Using a timer system, each second now the tiles that are being processed
are checked if they could use display.
To make this work pretty, I had to use the threaded 'tile processor' for
a single thread too, but that's now proven to be stable.
Also note that these updates draw per layer, including ztransp progress
separately from solid render.
- Recode of ztransp OSA
Until now (since blender 1.0) the ztransp part was fully rendered and
added on top of the solid part with alpha-over. This adding was done before
the solid part applied sub-pixel sample filtering, causing the ztransp
layer to be always too blurry.
Now the ztransp layer uses same sub=pixel filter, resulting in the same
AA level (and filter results) as the solid part. Quite noticable with hair
renders.
- Vector buffer support & preliminary vector-blur Node
Using the "Render Layer" panel "Vector" pass button, the motion vectors
per pixel are calculated and stored. Accessible via the Compositor.
The vector-blur node is horrible btw! It just uses the length of the
vector to apply a filter like with current (z)blur. I'm committing it anyway,
I'll experiment with it further, and who knows some surprise code shows up!
extern/bullet/BulletDynamics/ConstraintSolver/SimpleConstraintSolver.h
added newline at end of file.
intern/boolop/intern/BOP_Face2Face.cpp
fixed indentation and had nested declarations of a varible i used
for multiple for loops, changed it to just one declaration.
source/blender/blenkernel/bad_level_call_stubs/stubs.c
added prototypes and a couple other fixes.
source/blender/include/BDR_drawobject.h
source/blender/include/BSE_node.h
source/blender/include/butspace.h
source/blender/render/extern/include/RE_shader_ext.h
added struct definitions
source/blender/src/editmesh_mods.c
source/gameengine/Ketsji/KX_BlenderMaterial.cpp
source/gameengine/Ketsji/KX_ConvertPhysicsObjects.cpp
source/gameengine/Ketsji/KX_RaySensor.cpp
removed unused variables;
source/gameengine/GameLogic/Joystick/SCA_Joystick.cpp
changed format of case statements to avoid warnings in gcc.
Kent
-> Rendering in RenderLayers
It's important to distinguish a 'render layer' from a 'pass'. The first is
control over the main pipeline itself, to indicate what geometry is being
is rendered. The 'pass' (not in this commit!) is related to internal
shading code, like shadow/spec/AO/normals/etc.
Options for RenderLayers now are:
- Indicate which 3d 'view layers' have to be included (so you can render
front and back separately)
- "Solid", all solid faces, includes sky at the moment too
- "ZTransp", all transparent faces
- "Halo", the halos
- "Strand", the particle strands (not coded yet...)
Currently only 2 'passes' are exported for render, which is the "Combined"
buffer and the "Z. The latter now works, and can be turned on/off.
Note that all layers are still fully kept in memory now, saving the tiles
and layers to disk (in exr) is also todo.
-> New Blur options
The existing Blur Node (compositor) now has an optional input image. This
has to be a 'value buffer', which can be a Zbuffer, or any mask you can
think of. The input values have to be in the 0-1 range, so another new
node was added too "Map Value".
The value input can also be used to tweak blur size with the (todo)
Time Node.
Temporal screenies:
http://www.blender.org/bf/rt.jpghttp://www.blender.org/bf/rt1.jpghttp://www.blender.org/bf/rt2.jpg
BTW: The compositor is very slow still, it recalulates all nodes on each
change still. Persistant memory and dependency checks is coming!
- New Node "Composite" is output node that puts composited result back
in render pipeline.
- This then also displays in the render window while editing
- But, only with Scene buttons option "Do Compositor" set
- Then, just press F12 or render anims to see the magic!
For clarity, the former 'Output" node is renamed to "Viewer".
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!
Until now, the zbuffer was written straight from the internal zbuffer,
which has values that are inverse-proportional (like 1.0/z) which makes
it very hard to use it for postprocess, like zblur or other composit effects
that require Z.
Based on info from ILM, the values stored for Z in exr files is the
actual distance from a camera. I think that's about time to migrate to that
convention!
By default now, after render, the z values are converted to floats. This
saves in exr files now, but not in the Iris Z files. That latter was a
blender-only anyway, so might be not a real hassle to drop. :)
You can see the difference in the image window, but notice the range now
is linear mapped from camera clipstart to clipend.
Note; I just discover that ortho Z values need a different correction...
- Image textures use float colors now, when present. Works for mipmap too,
and for AO skycolor (probes)
- Backbuffer option uses float buffers too. Note that rendering OSA will
resample the backbuffer, filtering it... will need to be solved with the
new composit stage
- LMB sampling in image window now shows float color too
+ bugfix in imbuf, filtering for float buffers had an error.
the coordinate outputs now have correct dx/dy vectors for Image AA, and
texture delivers correct intensity, rgb, alpha and normal.
Note; we need a "Vector Mapping" node, to do 2d/3d mapping, like in the
Material "Map In" panel.
**** NEW: Group Nodes
Node trees usually become messy and confusing quickly, so we need
not only a way to collapse Nodes into single 'groups', but also a
way to re-use that data to create libraries of effects.
This has been done by making a new Library data type, the NodeTree.
Everything that has been grouped is stored here, and available for
re-use, appending or linking. These NodeTrees are fully generic,
i.e. can store shader trees, composit trees, and so on. The 'type'
value as stored in the NodeTree will keep track of internal type
definitions and execute/drawing callbacks. Needless to say, re-using
shader trees in a composit tree is a bit useless, and will be
prevented in the browsing code. :)
So; any NodeTree can become a "Goup Node" inside in a NodeTree. This
Group Node then works just like any Node.
To prevent the current code to become too complex, I've disabled
the possibility to insert Groups inside of Groups. That might be
enabled later, but is a real nasty piece of code to get OK.
Since Group Nodes are a dynamic Node type, a lot of work has been
done to ensure Node definitions can be dynamic too, but still allow
to be stored in files, and allow to be verified for type-definition
changes on reloading. This system needs a little bit maturing still,
so the Python gurus should better wait a little bit! (Also for me to
write the definite API docs for it).
What works now:
- Press CTRL+G to create a new Group. The grouping code checks for
impossible selections (like an unselected node between selected nodes).
Everthing that's selected then gets removed from the current tree, and
inserted in a new NodeTree library data block. A Group Node then is
added which links to this new NodeTree.
- Press ALT+G to ungroup. This will not delete the NodeTree library
data, but just duplicate the Group into the current tree.
- Press TAB, or click on the NodeTree icon to edit Groups. Note that
NodeTrees are instances, so editing one Group will also change the
other users.
This also means that when removing nodes in a Group (or hiding sockets
or changing internal links) this is immediately corrected for all users
of this Group, also in other Materials.
- While editing Groups, only the internal Nodes can be edited. A single
click outside of the Group boundary will close this 'edit mode'.
What needs to be done:
- SHIFT+A menu in toolbox style, also including a list of Groups
- Enable the single-user button in the Group Node
- Displaying all (visible) internal group UI elements in the Node Panel
- Enable Library linking and prevent editing of Groups then.
**** NEW: Socket Visibility control
Node types will be generated with a lot of possible inputs or outputs,
and drawing all sockets all the time isn't very useful then.
A new option in the Node header ('plus' icon) allows to either hide all
unused sockets (first keypress) or to reveil them (when there are hidden
sockets, the icon displays black, otherwise it's blended).
Hidden sockets in Nodes also are not exported to a Group, so this way
you can control what options (in/outputs) exactly are available.
To be done:
- a way to hide individual sockets, like with a RMB click on it.
**** NEW: Nodes now render!
This is still quite primitive, more on a level to replace the (now
obsolete and disabled) Material Layers.
What needs to be done:
- make the "Geometry" node work properly, also for AA textures
- make the Texture Node work (does very little at the moment)
- give Material Nodes all inputs as needed (like Map-to Panel)
- find a way to export more data from a Material Node, like the
shadow value, or light intensity only, etc
Very important also to separate from the Material Buttons the
"global" options, like "Ztransp" or "Wire" or "Halo". These can not
be set for each Material-Node individually.
Also note that the Preview Render (Buttons window) now renders a bit
differently. This was a horrid piece of antique code, using a totally
incompatible way of rendering. Target is to fully re-use internal
render code for previews.
OK... that's it mostly. Now test!
********* Node editor work:
- To enable Nodes for Materials, you have to set the "Use Nodes"
button, in the new Material buttons "Nodes" Panel or in header
of the Node editor. Doing this will disable Material-Layers.
- Nodes now execute materials ("shaders"), but still only using the
previewrender code.
- Nodes have (optional) previews for rendered images.
- Node headers allow to hide buttons and/or preview image
- Nodes can be dragged larger/smaller (right-bottom corner)
- Nodes can be hidden (minimized) with hotkey H
- CTRL+click on an Input Socket gives a popup with default values.
- Changing Material/Texture or Mix node will adjust Node title.
- Click-drag outside of a Node changes cursor to "Knife' and allows to
draw a rect where to cut Links.
- Added new node types RGBtoBW, Texture, In/Output, ColorRamp
- Material Nodes have options to ouput diffuse or specular, or to use
a negative normal. The input socket 'Normal' will force the material
to use that normal, otherwise it uses the normal from the Material
that has the node tree.
- When drawing a link between two not-matching sockets, Blender inserts
a converting node (now only for value/rgb combos)
- When drawing a link to an input socket that's already in use, the
old link will either disappear or flip to another unused socket.
- A click on a Material Node will activate it, and show all its settings
in the Material Buttons. Active Material Nodes draw the material icon
in red.
- A click on any node will show its options in the Node Panel in the
Material buttons.
- Multiple Output Nodes can be used, to sample contents of a tree, but
only one Output is the real one, which is indicated in a different
color and red material icon.
- Added ThemeColors for node types
- ALT+C will convert existing Material-Layers to Node... this currently
only adds the material/mix nodes and connects them. Dunno if this is
worth a lot of coding work to make perfect?
- Press C to call another "Solve order", which will show all possible
cyclic conflicts (if there are).
- Technical: nodes now use "Type" structs which define the
structure of nodes and in/output sockets. The Type structs store all
fixed info, callbacks, and allow to reconstruct saved Nodes to match
what is required by Blender.
- Defining (new) nodes now is as simple as filling in a fixed
Type struct, plus code some callbacks. A doc will be made!
- Node preview images are by default float
********* Icon drawing:
- Cleanup of how old icons were implemented in new system, making
them 16x16 too, correctly centered *and* scaled.
- Made drawing Icons use float coordinates
- Moved BIF_calcpreview_image() into interface_icons.c, renamed it
icon_from_image(). Removed a lot of unneeded Imbuf magic here! :)
- Skipped scaling and imbuf copying when icons are OK size
********* Preview render:
- Huge cleanup of code....
- renaming BIF_xxx calls that only were used internally
- BIF_previewrender() now accepts an argument for rendering method,
so it supports icons, buttonwindow previewrender and node editor
- Only a single BIF_preview_changed() call now exists, supporting all
signals as needed for buttos and node editor
********* More stuff:
- glutil.c, glaDrawPixelsSafe() and glaDrawPixelsTex() now accept format
argument for GL_FLOAT rects
- Made the ColorBand become a built-in button for interface.c
Was a load of cleanup work in buttons_shading.c...
- removed a load of unneeded glBlendFunc() calls
- Fixed bug in calculating text length for buttons (ancient!)
(As usual movies disappears after while)
Face example showing stress values on a blend. White is stretch, black
is squeeze
http://www.blender.org/bf/0001_0014.avi
Quick test with softbody stretch
http://www.blender.org/bf/0001_0100.avi
Based on the difference of the "Orco" (original undeformed coordinate)
and the actual render coordinate, a stress value is computed to make
textures react to stretching or wrinking skin.
The texture coordinate is neutral (0) on relaxed state. -1 is squeezed
to zero, +1 is stretched to infinity.
Note that scaling (object itself or parent) also will result in
stress values.
The reason for the huge commit is a cleanup in allocating memory for
the vertices. These were growing too large with new options, so now it
allocates the optional coordinates dynamically.
Saves about 20 MB memory per 1M vertices already. But best of all is that
I now can add much more fun... so tangents, here we come!
Previous experiment (in 2000) didn't satisfy, it had even some primitive
NLA option in groups... so, cleaned up the old code (removed most) and
integrated it back in a more useful way.
Usage:
- CTRL+G gives menu to add group, add to existing group, or remove from
groups.
- In Object buttons, a new (should become first) Panel was added, showing
not only Object "ID button" and Parent, but also the Groups the Object
Belongs to. These buttons also allow rename, assigning or removing.
- To indicate Objects are grouped, they're drawn in a (not theme yet, so
temporal?) green wire color.
- Use ALT+SHIFT mouse-select to (de)select an entire group
But, the real power of groups is in the following features:
-> Particle Force field and Guide control
In the "Particle Motion" Panel, you can indicate a Group name, this then
limits force fields or guides to members of that Group. (Note that layers
still work on top of that... not sure about that).
-> Light Groups
In the Material "Shaders" Panel, you can indicate a Group name to limit
lighting for the Material to lamps in this group. The Lights in a Group do
need to be 'visible' for the Scene to be rendered (as usual).
-> Group Duplicator
In the Object "Anim" Panel, you can set any Object (use Empty!) to
duplicate an entire Group. It will make copies of all Objects in that Group.
Also works for animated Objects, but it will copy the current positions or
deforms. Control over 'local timing' (so we can do Massive anims!) will be
added later.
(Note; this commit won't render Group duplicators yet, a fix in bf-blender
will enable that, next commit will sync)
-> Library Appending
In the SHIFT-F1 or SHIFT+F4 browsers, you can also find the Groups listed.
By appending or linking the Group itself, and use the Group Duplicator, you
now can animate and position linked Objects. The nice thing is that the
local saved file itself will only store the Group name that was linked, so
on a next file read, the Group Objects will be re-read as stored (changed)
in the Library file.
(Note; current implementation also "gives a base" to linked Group Objects,
to show them as Objects in the current Scene. Need that now for testing
purposes, but probably will be removed later).
-> Outliner
Outliner now shows Groups as optio too, nice to organize your data a bit too!
In General, Groups have a very good potential... for example, it could
become default for MetaBall Objects too (jiri, I can help you later on how
this works). All current 'layer relationships' in Blender should be dropped
in time, I guess...
New diffuse shader, "Fresnel", which using existing fresnel formula.
Since it hilights edges (away from lamp), nice to fill darker parts with
the new layering system.
Weird stuff though;
http://www.blender.org/bf/0001_0040.avi
(Movie disappears in a couple of days!)
Note; for ray-shadow you need to use the Bias, to prevent 'terminator'
problems. I made that option default now.
(WIP, don't bugs for this in tracker yet please!)
- New Panel "Layers" in Material buttons, allows to add unlimited amount
of materials on top of each other.
- Every Layer is actually just another Material, which gets rendered/shaded
(including texture), and then added on top of previous layer with an
operation like Mix, Add, Mult, etc.
- Layers render fully independent, so bumpmaps are not passed on to next
layers.
- Per Layer you can set if it influences Diffuse, Specular or Alpha
- If a Material returns alpha (like from texture), the alpha value is
used for adding the layers too.
- New texture "Map To" channel allows to have a texture work on a Layer
- Each layer, including basis Material, can be turned on/off individually
Notes:
- at this moment, the full shading pass happens for each layer, including
shadow, AO and raytraced mirror or transparency...
- I had to remove old hacks from preview render, which corrected reflected
normals for preview texturing.
- still needs loadsa testing!
While investigating alternative filters (Mitchell), I found two small
errors in the Gauss code, it clipped wrong and multiplied wrong, causing
settings other than filter size 1.0 to not work properly.
Took the last-minute liberty to add more filter types in Blender too.
Also wrote an extensive log about how sampling & filtering in Blender
works.
http://www.blender3d.org/cms/Samples_and_Filtering.723.0.html
This means the diffuse and specular shaders don't use the normal
for hair (which is actually undefined, a hair is micro cylinder) but
it uses the tangent vector (vector in direction of hair).
For Diffuse, it computes a fake normal now, representing the optimal
hair normal pointing towards the light. All current builtin shaders
work with this, including ramps.
For Specular, it uses another formula to remap dot products for all
lines that now use the tangent vector instead of the normal:
dot = vector * tangent
dot = sqrt(1.0 - dot*dot)
Gives better results than using the 'fake' normal for diffuse. Officially
(according the papers) this could be used for diffuse too, but then hair
becomes very flat. Now you can control the flatness easily with ramps or
using Oren-Nayer for example.
Example image (disappears in some weeks)
http://www.blender.org/bf/rt9.jpg
- Added new texture channel "Strand" to apply textures on hairs over the
length of hair (1 dimensional). Orco now gives 1 fixed coordinate for
the entire hair, based on where it starts.
Note; UV doesn't work yet. Nor vertexcolor.
http://www.blender.org/bf/rt10.jpg
- AO and soft shadow AreaLight tables were generated without fixed seed,
causing animations to give unwanted amounts of noise.
- Made sure these tables now are calculated before render, with fixed seed
- Then found out the BLI_rand() has very bad seeding... it showed up as
patterns. After some experimenting, found a nice method using noise.c
hash tables. For compatibility with old code, named it BLI_srandom() to
use this next to the BLI_srand(). This follows libc rand() and random()
naming convention.
- Then of course threading should work... so made a BLI_thread_rand version
of the calls. Now supports up to 16 threads, comments added in .h and .c
Result is stable animation render with AO and soft shadow. But, please
test and feedback!
Area light soft shadow now renders transparant shadow as well.
ALso: found error in correct threadsafe use of soft shadow tables. Caused
dither/noise not to look as well as it could.
parameters the material preset menu won't be as useful. Both glass presets will look the same
because there is no 'filter' parameter in the old yafray for instance.
So using the new Blender version with an old yafray version should work a bit better,
though the other way around, using the new yafray with an old blender version, will generally
not work as well.
I added a few extra things. In 'yafray' panel re-arranged some buttons, and added a new
button 'Clamp RGB'. This button will be enabled by default and helps to improve AA on
high contrast edges in the image. When using bokeh however, it is best to switch this off,
otherwise lens shaped highlights will be quite a bit less visible.
Changed the 'extinction' parameter name to the probably more correct term 'absorption',
though mathematically it works out the same. Also changed the behaviour of this color,
it no longer specifies a color that will be removed as I wrote in the previous commit,
but instead the actual color at one (blender) unit of distance. The 'Ds' (distance scale)
button below the color sliders controls the scaling of this unit distance.
What this means is that if you take the standard blender cube, which covers two units of
distance by default, setting the distance scale button to 2.0 will make sure that the color
you specified is exactly that color at that distance (provided the base color itself is white
of course, or 'filter' is 0, otherwise it will be filtered by the base color too).
Beyond this distance the color will get darker.
The glow option for point/soft/sphere lights has a new parameter 'GloOfs', or glow offset.
Setting this to a higher value then 0 will soften the central peak of the glow.
Another unreported bug fix: For xml export, when yafray failed to render the xml file
for some unknown reason, or because of other problems, the export code would still load
the previously rendered image, this causes problems however if the image resolution is
not the same as the current Blender buffer, and so could cause memory corruption or crashes.
This is now taken into account.
World image backgrounds now use the blender mapping settings as well, but only the
'AngMap', 'Sphere' and 'Tube' settings. But in yafray those last two, unlike Blender, cover
the whole view, not just the upper half, so is not really fully compatible with yafray.
So now you have to set one of these buttons too when loading a hdr lightprobe image.
btw, something I forgot to mention in previous commits is that the exposure control using
the texture brightness slider is no longer restricted to integer values. It is now a
floating point value, so you're not restricted to the 0 1 and 2 slider positions anymore,
anything in between will work too.
And finally, display updating is now more like Blender, using the mouse cursor as frame
counter for animation, etc.
of course...)
Not quite complete, but due to lack of time as good as it will get for now.
From the previous commit, forgot to report that basic fog is supported as well. Though because I had not much time to complete the code, it is sort of unfinished, and you will have
to tweak parameters specifically for yafray again. It uses only the world horizon color, and
only uses the Blender mist distance setting.
Textures now support checker clip mode.
Fixed possibly all 'duplilist non-empty' errors, though it could hide the real cause of the
error.
AA is no longer enabled automatically for certain GI quality settings, I thought it best to
leave it to the user to decide.
SkyDome GI mode now supports cache as well. There is a new option in the GI quality menu 'Use
Blender AO settings', which will as it says use the most important AO settings for the
skydome parameters. The only AO parameters used are 'Samples', 'Dist' and the random sampling
switch, which unlike in Blender you might want to use more often, since the QMC sampling used
in yafray can result in visible patterns or a dithering type look. 'Random' is not completely
random in yafray however, it is actually jittered (stratified) sampling.
Using an occlusion cache, doesn't necessarily mean that you will always get much shorter
render times. As with 'full' GI and cache, one problem is bumpmaps, when using bump (or
normal) maps, the sampling will be much more dense, using lots more rendertime.
As a temporary fix there is a button 'NoBump', but this also has the side effect that in
areas of total indirect light (or when used with SkyDome cache) no bumpmapping will be
visible. It is therefor best used with some direct light as well.
For SkyDome with cache, and strong bumpmapping it might actually not make much difference,
since for low distance values you can usually get away with low sample values as well.
The entire material panel is now replaced by another panel to show only the parameters
important to yafray and add some new ones as well.
Since lots of users (especially yafray beginners) have had problems getting certain material
aspects right, there is now a material preset menu available to hopefully solve some of the
most common "How do I do this? It doesn't work!" questions seen in various forums.
Choosing an option from this menu will set the required parameters to default
values for yafray, and you can work your way from there to tweak it something you want.
Most buttons are copies of the same Blender parameters, with some variations. Just like
Blender 'Ray Mirror' enables reflection, 'Ray Transp' enables refraction. You can use
'ZTransp' for materials that have texture maps with alpha channels.
Again, same as Blender 'rayMir' sets the amount of reflection. Next button 'frsOfs' however
controls fresnel offset, meaning that when this is set to 1, you will get no fresnel effect
and when set to 5, reflection is totally determined by fresnel, which is important for
realistic glass/metals/etc.
IOR is self-explanatory (...), same as Blender.
When you have 'Ray Transp' enabled, the blender 'filter' button will appear next to the IOR
button. This has the same effect as in Blender.
Below that there are some new parameters, 'Ext.Color' sets the extinction color for
transparent materials. Usually, in real transparent materials, light loses some of it's
energy the further it has to travel through the object. This effect can be simulated with
this parameter. Thing to look out for is that it specifies the color which will be
REMOVED after traveling through the object. What this means is that say you have a clear
white glass sphere, and set the extinction color to a strong blue, the result will be a
very yellow object when rendered.
Next to the color sliders, there is another set of three parameters, with which you can
enable color dispersion for transparent objects. 'Pwr' sets the amount of dispersion,
the higher, the more dispersion (the more colorful the result).
(For real world materials, this number can be found or derived from data in various glass catalogues)
The 'Samples' button below that sets the number of samples used, minimum values are around
7-10, and for very strong dispersion you might need a lot more.
As usual, this also means an increase in render time of course, but to simulate
realistic materials, you shouldn't really need more than 25 samples.
In addition to that, when using low sample numbers, but to still get a good spread of colors,
you can enable the jitter button, but this will also add noise.
Point/soft(point with shadowbuffer) or sphere lights (light with radius), have a new option
to add a simple glow effect, so that lights can be made visible.
NOTE: just like spotlight halo's, glow is not visible against the background, there must be
another object behind it. Simplest solution is to use a large black shadeless plane behind
your scene.
The glow intensity can be set with the 'GlowInt' parameter (use very low values around 0.01
even lower), and you can choose from two different types with the 'GlowType' button (which
don't look much different, but type 1 is probably better, type 0 faster).
And that's it, with apologies for the still missing features and
full support in general, but this will have to do for now.
This will add Minneart diffuse and WardIso specular to our shader menu.
Minneart gives nice control over darkness/brightness areas, the wardIso
over 'plastic' style sharp or fuzzy specular.
Webpage is being made with nice samples. Will be in release log.
Jorge: one change is in the do_versions, you inserted it on wrong location.
- cancelled previous commit to add RE_findTFAce, instead just added
a MemArena to render struct... free'd at end of render, can be used
to store other data as well
- switch rendering to using DerivedMesh API... this is slightly more
inefficient now because it is doing some unnecessary copying. Can
be fixed by defining a DerivedMesh function to convert the object
into a render object (on todo list)
are owned by mesh (or displistmesh)... this causes problems for
adapting to systems that build tfaces on the fly. Added RE_findTFace
function to allow allocating tfaces inside renderer itself.
- removed reference in render.h (really bad, shouldn't include a platform
specific header so widely unless really necessary)
- added M_PI, M_PI_2, M_SQRT, M_SQRT_2 defines to BLI_arithb.h... this is
a better place as it is more the "standard" blender math header. left
in winstuff.h as well for the moment for simplicity
- other changes are patches to code so everything works ok with this
shuffling.
- removed ugly pointerhack from OSA render (negative indices denoted
pointers). this should solve memory errors when using >1.5 gig mem
- cleaned up usage of zbuffer values. These are signed in Blender, and
treated as unsigned all over, giving confusing code
- fixed incorrect gamma-adding for halos (caused in after xmas commit)
And bugfix #2101; wire render didn't give correct rendering for mist.
This caused by fact wires are 2D pixel lines, and not correctly filled
in faces. Retrieving the 3d coordinate while render cannot use a face-
equation then. Solved by retrieving 3D coordinate based on zbuffer value.
Still todo here: calculating correct texture coordinates for wire-edges
that are no faces.
Render:
- New; support for dual CPU render (SDL thread)
Currently only works with alternating scanlines, but gives excellent
performance. For both normal render as unified implemented.
Note the "mutex" locks on z-transp buffer render and imbuf loads.
- This has been made possible by major cleanups in render code, especially
getting rid of globals (example Tin Tr Tg Tb Ta for textures) or struct
OSA or using Materials or Texture data to write to.
- Made normal render fully 4x32 floats too, and removed all old optimizes
with chars or shorts.
- Made normal render and unified render use same code for sky and halo
render, giving equal (and better) results for halo render. Old render
now also uses PostProcess options (brightness, mul, gamma)
- Added option ("FBuf") in F10 Output Panel, this keeps a 4x32 bits buffer
after render. Using PostProcess menu you will note an immediate re-
display of image too (32 bits RGBA)
- Added "Hue" and "Saturation" sliders to PostProcess options
- Render module is still not having a "nice" API, but amount of dependencies
went down a lot. Next todo: remove abusive "previewrender" code.
The last main global in Render (struct Render) now can be re-used for fully
controlling a render, to allow multiple "instances" of render to open.
- Renderwindow now displays a smal bar on top with the stats, and keeps the
stats after render too. Including "spare" page support.
Not only easier visible that way, but also to remove the awkward code that
was drawing stats in the Info header (extreme slow on some ATIs too)
- Cleaned up blendef.h and BKE_utildefines.h, these two had overlapping
defines.
- I might have forgotten stuff... and will write a nice doc on the architecture!
channels to link texture to.
The amount of code changes seems large, but is mostly getting rind of
hardcoded values (6 and 8) for channels, replacing it with MAX_MTEX.
Further did some fixes;
- Ipo for Lamp showed too many mapping channels
- Texture MapTo buttons for lamp missed the slider to blend texture color
- Lamp texture mapping "View" only worked for Spot, now it uses lamp-
view vector for all types. (Nice for projections!)
- Ztransp material didn't raytrace at all (now just traces it entirely,
remember too set the transp depth for it)
- tramsparent material reflected wrong in mirror material, due to
specular being added without alpha.
- Cleaned up some code to improve raytrace speed some. The old conventions
from before the AA recode were still there, this allowed coherence for
octree traversal. Current AA doesn't allow this anymore.
Added is improved check for 'first hit' on shadow render, per lamp this
now is stored
All in all, render with ray trace improved about 10-15%.
Extended the range of the depth and cdepth parameters as reqested by leope.
Bumpmapping should now be a bit more similar to the Blender render.
Added support for all remaining lightsources in yafray, tried to make use of
as much of the existing Blender parameters as possible.
Blender Lamp: added switch to enable rendering with shadowbuffer ('softlight' in yafray).
All other parameters are similar to the Blender settings, for yafray both the
bias parameter and the shadowbuffer size can be lower than equivalent Blender
settings, since the yafray buffer is floating point. Remember that 6 shadowmaps
are created in this case, so can use quite a bit of memory with large
buffer settings.
When 'ray shadow' is enabled for this lamp type, it is possible to set a light
radius to create a spherical arealight source ('spherelight' in yafray),
when this is 0, it is exported as a pointlight instead.
Blender Spot: as in Blender now supports 'halo' rendering.
Halo spots always use shadowbuffers, so when enabled the buttons for shadowmap
settings will appear. The 'ray shadow' button can still be used to disable
shadows cast onto other objects, independent of halo shadows.
One thing to remember, halo's don't work with empty backgrounds, something must
be behind the spotlight for it to be visible.
And finally, the photonlight:
probably the most confusing (as more things related to yafray), the photonlight
is not a real lightsource, it is only used as a source to shoot photons from.
Since indirect lighting is already supported (and looks better as well)
only caustics mode is supported.
So to be able to use this properly other lightsources must be used with it.
For the photonlighting to be 'correct' similar lightsettings as for the 'source'
light are needed.
Probably the best way to do this, when you are happy with the lighting setup
you have, and want to add caustics, copy the light you want to enable for
caustics (shift-D) and leave everything as is, then change the mode to
'Photon'.
To not waiste any photons, the photonlight behaves similar to the spotlight,
you can set the width of the beam with the 'angle' parameter. Make sure
that any object that needs to cast caustics is within that beam, make
the beam width as small as possible to tightly fit the object.
The following other parameters can be set:
-photons: the number of photons to shoot.
-search: the number of photons to search when rendering, the higher,
the blurrier the caustics.
-depth: the amount of photon bounces allowed, since the primary use is for
caustics, you probably best set this to the same level as the 'ray depth'
parameter.
-Blur: this controls the amount of caustics blur (in addition to the search
parameter), very low values will cause very sharp caustics, which when used
with a low photonnumber, probably lead to only some noisy specks being rendered.
-Use QMC: Use quasi monte carlo sampling, can lead to cleaner results, but also
can sometimes cause patterns.
Since the photonlight has no meaning to Blender, when using photonlights and
switching back to the internal render, the light doesn't do anything, and no
type button will be selected. The lightsource can still be selected, but unless
switching to yafray, no parameters can set.
Apologies to Anexus, I had no time to really do something with your code,
I'll still look at it later, to see if I can improve anything in my implementation.
old files still use the old fast OSA, and when you want a specific
material to have specular/shader/texture AA you can set this individual.
When rendering ray_mir or ray_transp or ray_shadow the new OSA will be
effective by default however.
Still todo; make this switch work for transparant faces and unified...
http://www.blender3d.org/cms/Ramp_Shaders.348.0.html
Material color and specular now can be defined by a Colorband. The actual
color then is defined during shading based on:
- shade value (like dotproduct)
- energy value (dot product plus light)
- normal
- result of all shading (useful for adding stuff in the end)
Special request from [A]ndy! :)
When tracing a mirror with AO, the rendering was extremely slow due to
each mirror sample (like 8 per pixel) taking a full range of AO samples.
Now it uses for mirror samples a corrected amount, which makes sure for
a single pixel still a full AO range is used.
Makes mirror+AO render 5-6 times faster, at least.
bytes for RGB.
This to allow very bright contrasted images to be used for AO as well. As
a first start also the Texture->Colors panel now allows contrast setting
up to 5.0 (was 2.0).
(1 lamp, shadow). The 'coherence' check gets reset now for each new
pixel rendered, which remains efficient for oversampling.
- small cleanups in code, prototype added, less globals.
- cubemap relied on pointer to MFace, which is only available for Mesh
when directly converted to renderfaces.
It then checked the 'puno' flag where also bits were set to indicate
the optimal projection for a face (XY, XZ or YZ).
- I found out the renderface also has a puno flag, so the mface pointer
in a renderface is redundant. Is removed now
- added code in texture cubemap call, which checks on a projection flag
in 'puno'. If not set, it uses the orco's to calculate one.
- this means, that cubemap now also works for other objects than meshes,
provided they have an orco block while render.
- if no orco block available, it uses the 'global' projection to find which
of the cube sides map.
I couldnt find other errors with subsurf & orco though...
- changed code to make use of actual textures, not the hackish
'externtex', which is only for tools
- added a 'displacement' vector in ShadeInput, and moved calculation of
displacement vector to texture.c itself. So it works with stencil, but
also for options as 'add', 'mult' and 'sub'.
- for RGB textures it uses the brightness value of color for displace
- for stucci, and plugin textures returning a normal, it uses that
- Also: wrote call in end of preparing renderfaces, to split non-flat
quad faces in triangles. gives a lot fewer errors in displace textures,
but also raytracing irregular subsurfs goes better now.
- texture mapping that works for displace: orco, sticky, global, obj, normal.
UV not yet. Reflection-displace? uhh! :)
yet (R.vn and R.vlr no longer exist, and were needed to get the image mapped
right). Works esp. well with Subsurfs. Sensitive to vertex normal issues
in Simple and Mesh modes.
-Also porting Simple Subdivide. Subdivides mesh at rendertime w/o changing
shape, for smooth displace and Radiosity.
-Removed an unused var from KnifeSubdivide.
- New lamp type added "Area". This uses the radiosity formula (Stoke) to
calculate the amount of energy which is received from a plane. Result
is very nice local light, which nicely spreads out.
- Area lamps have a 'gamma' option to control the light spread
- Area lamp builtin sizes: square, rect, cube & box. Only first 2 are
implemented. Set a type, and define area size
- Button area size won't affect the amount of energy. But scaling the lamp
in 3d window will do. This is to cover the case when you scale an entire
scene, the light then will remain identical
If you just want to change area lamp size, use buttons when you dont want
to make the scene too bright or too dark
- Since area lights realistically are sensitive for distance (quadratic), the
effect it has is quickly too much, or too less. For this the "Dist" value
in Lamp can be used. Set it at Dist=10 to have reasonable light on distance
10 Blender units (assumed you didnt scale lamp object).
- I tried square sized specularity, but this looked totally weird. Not
committed
- Plan is to extend area light with 3d dimensions, boxes and cubes.
- Note that area light is one-sided, towards negative Z. I need to design
a nice drawing method for it.
Area Shadow
- Since there are a lot of variables associated with soft shadow, they now
only are available for Area lights. Allowing spot & normal lamp to have
soft shadow is possible though, but will require a reorganisation of the
Lamp buttons. Is a point of research & feedback still.
- Apart from area size, you now can individually set amount of samples in
X and Y direction (for area lamp type 'Rect'). For box type area lamp,
this will become 3 dimensions
- Area shadows have four options:
"Clip circle" : only uses a circular shape of samples, gives smoother
results
"Dither" : use a 2x2 dither mask
"Jitter" : applys a pseudo-random offset to samples
"Umbra" : extra emphasis on area that's fully in shadow.
Raytrace speedup
- improved filling in faces in Octree. Large faces occupied too many nodes
- added a coherence check; rays fired sequentially that begin and end in
same octree nodes, and that don't intersect, are quickly rejected
- rendering shadow scenes benefits from this 20-40%. My statue test monkey
file now renders in 19 seconds (was 30).
Plus:
- adjusted specular max to 511, and made sure Blinn spec has again this
incredible small spec size
- for UI rounded theme: the color "button" displayed RGB color too dark
- fixed countall() function, to also include Subsurf totals
- removed setting the 'near' clipping for pressing dot-key numpad
- when you press the buttons-window icon for 'Shading Context' the context
automaticilly switches as with F5 hotkey
Please be warned that this is not a release... settings in files might not
work as it did, nor guaranteed to work when we do a release. :)
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!
This is a revision of the old NeoGeo raytracer, dusted off, improved quite
a lot, and nicely integrated in the rest of rendering pipeline.
Enable it with F10-"Ray", and set either a 'ray-shadow' lamp or give the
Material a "RayMirror" value.
It has been added for 2 reasons:
- get feedback on validity... I need artists to play around with it if it's
actually useful. It still *is* raytracing, meaning complex scenes will
easily become slow.
- for educational purposes. All raytracing happens in ray.c, which can be
quite easily adjusted for other effects.
When too many disasters pop up with this, I'll make it a compile #ifdef.
But so far, it seems to do a decent job.
Demo files: http://www.blender.org/docs/ray_test.tgz
An article (tech) about how it works, and about the new octree invention
will be posted soon. :)
Note: it doesn't work with unified render yet.
User Info:
Hard coded limits on the total number of face, verts, halos, and lamps
is gone. Blender now allocates the tables for these on an as needed
basis. As long as your system can come up with the memory, you won't
run out. As a bonus, it also uses slightly less memory on smaller scenes.
Coder info:
This has been in tuhopuu for a while, but I don't know how hard it
has been tested. Since it now allocates only an initial 1024 tables
(of 256 verts/faces/halos each), it seems like it has been put through
it's paces. Lamps are allocated one at a time, and I start with 256.
I rendered 2.5M Faces/Verts/Halos. 4444 lamps. None the less, I left
a few printf's in the realocation to hunt bugs. I'll take them out
just before the release freeze.
Also, be on the lookout for other "sanity checks" that assume
a limited number of the above items. I think I got them all, but
you never know.
Multiple environments now can be rendered in one pass. Previously the other objects with environment maps didn't show up in a reflection. Like this:
http://www.blender.org/bf/dep.jpg
By default, Blender renders now this result:
http://www.blender.org/bf/dep0.jpg
For a further 'recursive ray-tracing effect' you can give each EnvMap texture a higher "Depth" value. Here is a result with depth set at '2':
http://www.blender.org/bf/dep2.jpg
Related new options:
- in (F10) DisplayButtons, environment map rendering can be turned on and off.
- in EnvMap texture buttons you can free all environment maps
- Environment map sizes are also reduced with the (F10) 'percentage' option.
Tech note: with this commit the VlakRen struct has on *ob pointer!
- the link order for Blender has changed, the libradiosity.a has to be moved after the librender.a (obviously for a new dependency!). Check blender/source/Makefile
- there's a new file: blender/source/radiosity/intern/source/radrender.c
Here's what the new code does:
Using the core routines of the Radiosity tool, each renderface with 'emit material' and each renderface with 'radio material flag' set will be used to itterate to a global illumination solution. Per face with high energy (emit) little images are rendered (hemicubes) which makes up lookup tables to 'shoot' its energy to other faces.
In the end this energy - color - then is directly added to the pixel colors while rendering, Gouraud shaded.
Since it's done with renderfaces, it works for all primitives in Blender.
What is doesn't do yet:
- take into account textured color of faces. Currently it uses the material RGB color for filtering distributed energy.
- do some smart pre-subdividing. I don't know yet if this is useful... Right now it means that you'll have to balance the models yourself, to deliver small faces where you want a high accuracy for shadowing.
- unified render (is at my todo list)
User notes:
- per Material you want to have included in radiosity render: set the 'radio' flag. For newly added Materials it is ON by default now.
- the Ambient slider in Material controls the amount of radiosity color.
- for enabling radiosity rendering, set the F10 "Radio" button.
- the Radiosity buttons now only show the relevant radiosity rendering options. Pressing "collect meshes" will show all buttons again.
- for meshes, the faces who use Radio material always call the 'autosmooth' routine, this to make sure sharp angles (like corners in a room) do not have shared vertices. For some smooth models (like the raptor example) you might increase the standard smoothing angle from 30 to 45 degree.
Technical notes:
- I had to expand the renderface and rendervertices for it... shame on me! Faces have one pointer extra, render vertices four floats...
- The size of the hemicubes is now based at the boundbox of the entire scene (0.002 of it). This should be more reliable... to be done
- I fixed a bug in radiosity render, where sometimes backfaces where lit
In general:
I'd like everyone to play a bit with this system. It's not easy to get good results with it. A simple "hit and go" isn't there... maybe some good suggestions?
