Blender is Happiness in R&D Projects

Blender PT
Conference 2013
Porto (Portugal)
Carlos Glez. Morcillo
Associate Professor
Escuela Superior de Informática
University of Castilla-La Mancha
Blender Foundation
Certified Trainer
April 7th
2013
or... “Using Blender as an Integrated
Rendering Engine in R&D projects”

[Slide 2]
□ What is Rendering?
□ Why Blender?
□ Blender as a
«Black Box»
□ R&D Projects
□ MultiAgent Rendering
□ Sign Language
□ Indoor Navigation
□ Showcase
Carlos González Morcillo (Carlos.Gonzalez@uclm.es) – University of Castilla-La Mancha
Contents
Intro Why Blender? Black Box R&D Projects Showcase

[Slide 3]
□ Why Blender?
□ Blender as a
«Black Box»
□ R&D Projects
□ Sign Language
□ Showcase
Contents

[Slide 4]
□ Why Blender?
□ Blender as a
«Black Box»
□ R&D Projects
□ Sign Language
□ Showcase
Contents

[Slide 5]
□ Why Blender?
□ Blender as a
«Black Box»
□ R&D Projects
□ Sign Language
□ Showcase
Contents

[Slide 6]
□ Why Blender?
□ Blender as a
«Black Box»
□ R&D Projects
□ Sign Language
□ Showcase
Contents

[Slide 7]Carlos González Morcillo (Carlos.Gonzalez@uclm.es) – University of Castilla-La Mancha
Botticelli (XV)Botticelli (XV)
SearchforRealism...SearchforRealism...

Albrecht Dürer (XVI)Albrecht Dürer (XVI)

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WhatisRendering?
 What? Compute color for each pixel.
 How? Different Methods.
Real Time Rendering
(GPU Based)
“Realistic” Ray-Traced Rendering
(Normally CPU Based)

RealisticRealistic
Rendering!!Rendering!!

RealisticRealistic
Rendering!!Rendering!!
LightLight
Simulation!!Simulation!!

Modeling
Animation
Game
Engine
VideoEditor
Nodes
Scripting
Rendering
Blender
Yaf(a)ray
C
ycles
etc...
Simulation
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Why
Blender?
Blender:
Swiss Army
Knife of 3D
graphics

WhyBlender?
Blender is
Free Software
F0: Run the program
F1: Study how it works,
and change it
F2: Redistribute copies.
F3: Distribute copies of
your modified versions.
Integration in
R&D Projects!
4 Essential Freedoms:

WhyBlender?
Blender is
Free Software
F0: Run the program
and change it
Integration in
R&D Projects!

Geometry
Materials &
Textures
Light Sources
Particles
Others....
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Blenderasa«BlackBox»

Geometry
Materials &
Textures
Light Sources
Particles
Others....
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After
some
Time
Working
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Resulting
2D Image
After
some
Time
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BlenderinNumbers
● 84% C/C++, 13% Python, 3% Others
● 345 Years of effort!! (> 15.000.000 €)
● Large development team (>90)

QualityoftheBlenderCode
"The only reliable measurement of Code Quality: WTFs/minute!"

SomeBlenderSnippets
Blender 2.26 (first public release)
intern/decimation/test/decimate_glut_test/intern/main.cpp
Lines 192-198
faces>push_back(load_face.verts[0]);
// free up the memory this pile of shit used
// to allocate the polygon's vertices
free (load_face.verts);

SomeBlenderSnippets
Blender 2.26 (first public release)
source/blender/render/intern/source/rendercore.c
Lines 230-240
void scanlinesky(char *rect, int y)
{
  /* have to type this! set to :  addalphaUnder:
     char*, char* addalphaUnderGamma: ditto called
     with char *, uint* !!! unmangle this shit... */
  void (*alphafunc)();
  float fac;
  int dx, x, ofs;
  unsigned int col=0, *rt;
  short *sp;
  char *cp, *cp1;
  float u, v;

SomeBlenderSnippets
Blender 2.50 (new trunk)
extern/bullet2/src/Bullet/ConstraintSolver/btConeConstraint.cpp
Lines 799-803
if (fabs(vSwingAxis.x()) > SIMD_EPSILON)
{
// nonzero twist?! this should never happen.
int wtf = 0; wtf = wtf;
}
source/blender/blenkernel/intern/library.c
Lines 801-802
/* this format specifier is fucked... */
sprintf(id>name+2, "%s.%0.3d", left, nr);

SomeBlenderSnippets
Blender 2.66 (latest release)
extern/bullet2/src/LinearMath/btConvexHull.cpp
Lines 575-590
btAssert(v != 1);
btAssert(!isextreme[v]);
// wtf we've already done this vertex
isextreme[v]=1;
j=m_tris.size();
while(j) {
if(!m_tris[j]) continue; int3 t=*m_tris[j];
if(above(verts,t,verts[v],btScalar(0.01)*eps)) {
extrude(m_tris[j],v);
}
}
// now check for those degenerate cases where we
// have a flipped triangle or a really skinny

UseBlenderinyourR&DProjects
1) External Realistic Rendering Engine.
2) Creation of Graphical Assets.
3) Blender Customization: Development
of Particularized Tools (Python Scripting).
4) Testing Suite (find Bugs!).
4 Good Uses:

Research&DevelopmentProjects

MultiAgentRenderingOptimization
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Geometry
Materials &
Textures
Light Sources
Particles
Others....
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Ray Depth Light Samples
# Photons Use Cache
….
Config.
Parameters
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After
some
Time
Working
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Result
2D Image
After
some
Time
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Result
2D Image
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How
Much
Time?

RenderRender
TimeTime 4040hh

RenderRender
TimeTime 4040hh
216216KK FramesFrames
Stereoscopic (Stereoscopic (×2)×2)
1.972 Years1.972 Years

RenderRender
TimeTime 4040hh
a) 34.816 Coresa) 34.816 Cores

RenderRender
TimeTime 4040hh
a) 34.816 Coresa) 34.816 Cores
b) Optimizationb) Optimization

SpeedRenderingUp
Configuration
Parameters
Customization of

SpeedRenderingUp
Configuration
Parameters
Customization of
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Distributed Rendering

Objectives
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Config. Param.
Combine the advantages of both approaches
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Customization of

Objectives
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Config. Param.
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Customization of
Modeling of
ExpertExpert
KnowledgeKnowledge

Objectives
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Config. Param.
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Customization of
Modeling of
ExpertExpert
KnowledgeKnowledge
Inherent
ParallelParallel
ComputingComputing

ProposedSolution
Local
Rendering
(1 agent)

ProposedSolution
Local
Rendering
(1 agent)
MultiAgent
Rendering

Problem
Division 1
ProposedSolution
Local
Rendering
(1 agent)
MultiAgent
Rendering

Problem
Division 1
ProposedSolution
Local
Rendering
(1 agent)
MultiAgent
Rendering
Use Knowledge
(Local Optimization)
2

Problem
Division 1
ProposedSolution
Local
Rendering
(1 agent)
MultiAgent
Rendering
Use Knowledge
2
Combine
Results
3

Problem
Division 1
ProposedSolution
MultiAgent
Rendering
Use Knowledge
2
Combine
Results
3
MultiAgent
Architecture
Use of
Expert
Knowledge
Volunteer
Computing
Web Based!

GeneralWorkflow
Scene Analysis

ImportanceMap
Importance Map
Fast.
Approximation of
the complexity.

ImportanceMap
Importance Map
Very complex
(Mirror + Reflact)

ImportanceMap
Importance Map
Very complex
(Mirror + Reflact)
Simple zone

GeneralWorkflow

Results
16 Minutes. 8 Agents. B Opt.Level.121 Minutes. 1 Agent. No Opt.
Very different rendering times
with no noticeable changes.

Results

Ganas:TexttoSignLanguage
Automatic Synthesis of Sign
Language from written Spanish.
● Reusable Dictionary.
● Open Representation of Key
Poses.
● Facial and Corporal.
● Non Lineal Animation.
Dynamical blending by code.

Ganas:TexttoSignLanguage

ConSignos:SpeechtoSignLanguage
Exporter
Automatic
Sing Editor
(Blender)
Skeletal
Animation
+
Sign Elements
DB
Manual
Sign
Creation
DB
Sign
Elements
Parametric Desc.
Configuration
List of Tokens
Sockets
Essential Description
Facial
Animation

DesignoftheCharacters

ConSignos:SpeechtoSignLanguage

ElCano
Multimodal
Distributed
Architecture for
Indoor
Localization
University of Castilla-La Mancha
Indra Cátedras and Fundación Adecco

Showcase:WeatherinC-LeónShowcase:WeatherinC-León

￧
Showcase:VirtualMuseum
Over 70 models.
Linux + OpenGL.
http://www.esi.uclm.es/museo/

Showcase:GameDevelopment
4 Free Books (over 1200
pages) on Game
Development with
Blender, C++, Ogre and
other free multiplatform
technologies.

Blender PT 2013
Porto (Portugal) · 6/7 April 2013
or... “Using Blender as an Integrated
Rendering Engine in R&D projects”

Blender is Happiness in R&D Projects

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